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Review

Effect of Non-Thermal Food Processing Techniques on Selected Packaging Materials

Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia
*
Author to whom correspondence should be addressed.
Polymers 2022, 14(23), 5069; https://doi.org/10.3390/polym14235069
Submission received: 24 October 2022 / Revised: 15 November 2022 / Accepted: 16 November 2022 / Published: 22 November 2022
(This article belongs to the Special Issue Polymers in Food Science)

Abstract

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In the last decade both scientific and industrial community focuses on food with the highest nutritional and organoleptic quality, together with appropriate safety. Accordingly, strong efforts have been made in finding appropriate emerging technologies for food processing and packaging. Parallel to this, an enormous effort is also made to decrease the negative impact of synthetic polymers not only on food products (migration issues) but on the entire environment (pollution). The science of packaging is also subjected to changes, resulting in development of novel biomaterials, biodegradable or not, with active, smart, edible and intelligent properties. Combining non-thermal processing with new materials opens completely new interdisciplinary area of interest for both food and material scientists. The aim of this review article is to give an insight in the latest research data about synergies between non-thermal processing technologies and selected packaging materials/concepts.

1. Introduction

Tailor-made packaging solutions are used for each and individual food (or beverage) product. Packaging offers convenience in terms of distribution, traceability and effectual marketing. Adequate selection of packaging materials/systems gives as an output a prolonged shelf-life of foodstuffs whilst maintaining the quality and microbiological safety. Due to long processing times and subjection to high temperatures in thermal processing, the quality of food products cannot meet the consumers’ expectations in the 21st century. In that sense, current research is targeted towards in-package and post-package processing in order to achieve adequate decontamination rate of packaged foods. Selection of packaging materials used prior to processing is of high importance due to specific requirements for non-thermal conditions and risk of post-process recontamination [1,2] A recent review papers [3,4] describe progress and new trends in the production of smart, active and intelligent food packaging, with focus on biodegradable and biobased polymers. As for the future research authors emphasized the needs to focus on some important aspects such as development of highly sensitive, eco-friendly and low cost paper-based electrical sensors. Possibilities to scale-up, costs, regulatory aspects, and consumers’ acceptance are also often questionable, making it take a long time for these systems to be commercially available [5].
Traditional thermal food treatment results in deterioration of physico-chemical and sensory properties. Nowadays, consumer demands are shifted towards organoleptic superior properties (such as appearance and flavor) as well as in high nutritional value of the product with extended shelf-life. Non-thermal processing technologies (NTP), fulfill the above, so could potentially replace traditional thermal processing methods [6]. They cause inactivation of microbes without the direct application of heat, thus without affecting nutritional values. The most common NTPs are irradiation, ultrasound processing, plasma discharge, high-pressure processing, pulsed electric field, e-beam, and gamma irradiation. In some cases, they can cause the release of free radicals that might interact with packaging material or (inside pre-packed food) with food components, leading to undesirable, and sometimes adverse, reactions.
In the scope of this review, brief introduction to NTPs will be presented followed by explanations of their impact on properties of biobased polymers, edible films and nanomaterials. Additionally, and if existing in the scientific literature, the evidence of NTPs with real foodstuffs will be presented. A list of abbreviations is given at the end of the manuscript.

2. Short Overview of Non-Thermal Food Processing Techniques Commonly Applied on Food Packaging Materials

In the high pressure processing (HPP) method, the pressure is usually transferred by water contained in the high pressure processing chamber. Although this method started to be used more than a century ago, it finally reached the point where it can be applied commercially on a larger industrial scale [7]. The method involves the Le Chatelier and the isostatic principles. It requires relatively low amounts of energy, and can reuse the pressurization fluid (water) with zero waste emission. The compression is caused by the air and the water and alters the anatomy of microbial cell walls. This further weakens the activity of foodborne pathogens without affecting organoleptic properties or nutrient composition [8]. The main disadvantage related to this technique is its impact on the mechanical properties of packaging material. Since it impacts the morphological and thermal properties, it also changes the flexibility of materials and their barrier properties. For in-pack processing, packaging materials must be compressed at least 15% [9], which appears to be limiting factor for use of materials other than petroleum-based plastics. In addition, changes might result in higher migration values. Thus, great attention must be given when using high pressure processing with versatile biopolymers.
Cold plasma (CP) is a partially or fully ionized gaseous system composed of free electrons, ions, radicals, ultraviolet (UV) photons, and excited or non-excited molecules and atoms. Such an ionized gaseous system can cause the functionalization of the polymer surface, by introducing functional groups, such as hydroxyl, peroxide and ethers, by a cross-linking effect, or by increasing surface roughness (etching) [10,11,12]. It has shown good potential for food decontamination, with limited data about packaging materials. Cold plasma has been shown to affect the quality attributes of food during treatment and storage [13]. For in-package treatment, the product is first sealed inside mostly plastic (or glass) material, with air or with modified atmosphere, and the package is exposed to a strong electric field [14,15]. There are no specific packaging requirements, except the risk of production of free reactive species on the packaging surface must be checked from aspects related to chemical migration.
Pulsed electric field (PEF) uses electric waves with high voltage amplitude. Short electrical impulses (from microseconds to milliseconds each) of high voltage (typically 10–80 kV/cm) are supplied to the product placed between the electrodes in the chamber. The main advantage of this is the minimal loss of aroma and flavor occurs, with improved physico-chemical and nutritional properties [16]. Economically, although expensive for industrial implementation, PEF technology is cost and time effective. About 50% less electricity is required when compared to low-temperature-low-time thermal treatment [17,18]. Unfortunately, main disadvantages of this processing are: (i) requirement of a high peak power, (ii) limited (rather low) volume of the liquid that can be treated, (iii) inevitable occurrence of electrochemical reactions between the electrode and the food such as electrolysis of water, corrosion and migration. To date, few papers have been published about in-package PEF food processing. Even that there are few special requirements for packaging, high barrier materials used for aseptic packaging seem to be the most appropriate ones, such as ethylene vinyl acetate films filled with carbon-black particles [16,19].
Irradiation is a method that uses controlled radiant energy (such as X-ray, electron beams, gamma rays) directed towards foodstuffs in order to destroy microorganisms (such as Salmonella spp., Listeria spp., E. coli O157:H7), parasites and insects.
Electron beam (EB) and gamma irradiation (GI) are common methods used for sterilization of packaging surfaces, phytosanitary treatment, and pathogen elimination. Here, the absorbed dose is defined as one of the most critical factors related to the sterility assurance level. Prior to irradiation processing, prerequisites for food packaging materials are chemical stability (e.g., not prone to depolymerisation), good transparency (allowing the light to pass through to the processed food), in accordance with regulations applied and (desirably) of consumer acceptance [20].
Pulsed light (PL) technology is a method used for the sterilization of foods using very high power and very short duration pulses of light emitted by inert-gas flash lamps [21]. The high-power pulses of radiation can be in the spectra of ultraviolet (UV), visible and infrared (IR) light. The commercialization of pulsed light in-package treated foods requires the development of suitable packaging in order to avoid post-treatment recontamination. For the effective treatment, different aspects should be considered, such as food itself, processing parameters, microorganisms, and packaging material [22].
Ultrasound (US) is defined as a treatment that uses acoustic waves with frequencies between 20 kHz and 100 kHz. Ultrasound treatment is non-ionizing, non-invasive and does not pollute the environment [23]. It has many applications in food industry inducing filtration, crystallization, fogging, emulsification, oxidation and reduction reactions, extraction, drying, softening, sterilization, and cleaning. The activity is due to the phenomenon of cavitation, which includes the formation, growth and collapse of the created bubble. The growth and collapse of the bubbles will result in the formation of high temperatures and pressures in the matrix/cell [24]. However, this non-invasive method could affect the food packaging material if used as an in-pack treatment. Therefore, knowledge about changes in barrier performance, mechanical properties, and the risk of migration of unwanted substances from the material into the food must be seriously considered and studied before applying ultrasound treatment to a food product [25].

3. Impact of Non-Thermal Food Processing on Selected Packaging Materials

3.1. Biobased Polymers

According to the European Bioplastics Association, biopolymers can be classified as a fossil-fuel based and a biobased material. Both may be biodegradable or non-biodegradable. Biosourced polymers distinguish themselves depending on the source of the raw material used for their production. They can be systemized in three main groups as follows: (a) natural bioproducts (e.g., cellulose, hemicelluloses, starch, chitosan, lignin, pullulan, natural rubbers, plant oils, and fats etc.); (b) microbial produced bioplastics (e.g. bacterial polysaccharides: polyhydroxyalcanoate (PHA) and poly(3-hydroxybutyrate)s (PHB, PHBV, P3HB4HB, P3HBHHX), bacterial cellulose); and (c) chemically synthesized (e.g. poly(lactic acid) (PLA)). A recent market survey showed that more than 20 products are present at the pilot plant level (technology readiness level, TRL, 5), with very few products on industrial scale with TRL between 7 and 8 [26]. Both eco-friendly material alternatives and NTP can be considered to have a low environmental impact, and thus, by combining them an improved sustainability is achieved. Significant impacts of different methods on various biobased polymers are summarized in Figure 1.

3.1.1. Poly (Lactic Acid) (PLA)

This is compostable and non-toxic biobased aliphatic polyester derived by the fermentation of renewable resources such as starch and/or sugar from corn, cassava, potato or sugarcane. This material has a great mechanical strength and plasticity. It is accepted as GRAS (Generally Recognized as Safe) by the Food and Drug Administration (FDA) and is suitable for use in food and beverage packaging. PLA is commercially used for different shapes production, such as food overwraps, yoghurt cups, lunch boxes, blister packs, water and juice bottles, tableware, kitchen utensils etc. [27]. Further, more elaborated examples are used in active or intelligent packaging materials. Antipack TM stands for PLA/starch-based material incorporated with an antifungal substance which is gradually released to prevent mould growth during the storage period [28]. According to the literature data, the global production volume of PLA was around 190,000 tons in 2019 [29].
Almost a decade ago, [30] gave an interesting review on the effect of high pressure processing (HPP) on the integrity of various polymers including PLA. High pressure processing at 300 MPa during 10 min did not influence the thermomechanical properties of the post-processed films [31]. It was also reported that HPP significantly impacts morphology, structure/crystallinity and roughness if the material is treated with (for example, water) or without food [32]. For processing temperatures above its Tg (90–115 °C), it was shown to change amourphous phases to glassy state. This change has a direct and reversible effect decreasing the sorption of the aroma compounds in PLA [33], but at the same time increasing aroma permeation. Moreover, at higher temperatures (90–110 °C), significant opacification takes place, probably due to the re-crystallisation induced by hydrolysis [10,34]. Thus, temperature is considered an important factor for high pressure processing of PLA, which is usually performed at low operating temperatures (below 40 °C). Higher intensities of HPP (above 600 MPa) lead to significant changes in gas permeability, as well as enhanced water resistance of PLA films. However, these values remain significantly elevated compared to commercial plastic based on polyethylene (PE) and/or polypropylene (PP).
The synergistic effect of HPP and cinnamon oil incorporated in PLA was observed during 3 weeks of refrigerated storage of fresh chicken [31]. Listeria monocytogenes and Salmonella Typhimurium were efecitevely inactivated.
Recently, suitability of PLA bottles for HPP apple juice was demonstrated [35]. The treatment of PLA bottles with HPP at 600 MPa for 3 min did not cause alterations in the packaging shape and content, confirming PLA as a valid sustainable alternative to polyethylene terephthalate (PET) bottles for short-term cold storage. This is considered as a significant progress in PLA processing, compared to 10 years ago when PLA materials were shown to be not appropriate due to the unacceptable material embrittlement.
Thus, PLA seems to be a potential candidate as a packaging material for minimally processed food, with short shelf-life, that require less aggressive processing conditions.
Atmospheric cold plasma (CP) and dielectric barrier discharge plasmas (DBD) are used to improve the compatibility and hydrophilicity between PLA and thermoplastic starch (TPS) [36], polycaprolactone (PCL) [37] and zein [38]. In addition, plasma treatment can significantly contribute to the overall environmental impact, and hence entail future optimization of processing [36]. Cold plasma was also shown to improve the coating process and absorption capacity of antimicrobial agents on the PLA surface. Functional compounds can in turn be progressively released to packed food to exhibit bactericidal effect [39]. A combination of CP and nisin on PLA decreased the viability of Listeria monocytogenes by 2.25 log CFU/mL, while the control PLA film could not inhibit its growth.
Ultrasound was thought to accelerate the hydrolysis/transesterification reactions that drive the depolymerisation of PLA. However, from our knowledge no many studies on this subject are available. The effect of ultrasonic on PLA was insignificant compared to bulk erosion/depolymerisation, with appropriate media and salts over the range of treatment [40]. Ultrasonification of PLA with ZnO nanoparticles led to a better morphology, UV shielding, and better antimicrobial activity against E. coli and S. aureus [41].
Treating pomegranate juice packed in PLA coated PET bottles with PEF (100 L/h flow rate, 35 kV/cm field strength, 281 μs total treatment time) significantly improved the microbiological shelf-life of juices over 84 days [42].
Radiation was shown to cause major structure modifications and changes in the functional properties of PLA [43]. The radiation process leads to the formation of free polymer radicals that can induce two opposite types of reactions: (a) cross-linking (enhanced chemical and thermal properties), and/or (b) chain scission reactions (reduced tensile strength and enhanced hydrolysis rate) [44]. In most cases, one of them is predominant depending on the radiation conditions. A detailed description is well reported in the literature [45]. Radiation treatment makes possible to speed up the composting of PLA packages. EB and GI in doses up to 1.5 MeV and 1200 kGy, respectively, were shown to lead to a higher degradability of PLA. Under radiation, changes in molecular weight, morphology, flexural strength, and degradation profile are induced [46,47,48,49]. For doses around 45 kGy chain scission reactions are predominant over cross-linking, and thus they are defined as critical or transition zone between chain scission and recombination of radicals [50]. Taking into account the ecological impact of degradable materials where degradation process is favourable, in other purposes, such as long term food storage, the degradation should be slowed down. The improvement of thermal stability is not easy to achieve due to the complexity of the degradation mechanism. Treating nanoclay-modified PLA with EB promotes cross-linking and helps in controlling the degradation rate of PLA [44]. Similar effects could be also obtained after modification with compounds with aromatic structure, such as benzene ring [51] and copolymers [52,53], or by increasing treatment temperature above its glass transition [47]. Recently, [53] showed that the presence of SIS (styrene-isoprene-styrene triblock polymers) increased the thermal stability of PLA/SIS blends.

3.1.2. Poly (Butylene-Adipate-Co-Terephthalate)

Poly (butylene adipate-co-terephthalate) (PBAT) is obtained by poly-condensation between butanediol, adipic acid and purified terephthalic acid. It is considered the most promising aliphatic-aromatic co-polyester [54]. An aliphatic unit in the molecule chain provides good biodegradability, while the aromatic unit provides excellent mechanical properties compared to other biobased polymers. Since pure PBAT still does not satisfy commercial acceptance due to higher costs and mechanical properties not being comparable to synthetic polymers, it is often blended with other biobased polymers to improve its performance.
EB irradiation was used to chemically cross-link poly(glycolic acid)/PBAT blends to impart great barrier properties while maintaining a high toughness of 75 MPa. EB doses below 200 kGy were shown to enhance packaging performance [49,55,56], while doses higher than 300 kGy can cause inhomogeneity on the film surface of the material and degradation of its mechanical performance [57].
PBAT was shown to be sensitive to UV radiation, often known as photodegradation [58]. Thus, it is also considered as a perfect candidate for mulch films for agriculture [59].
Recently, [60] have shown a synergistic effect between UV-C LED irradiation and antimicrobial PLA/PBAT packaging enriched with grapefruit seed extract and zinc oxide blend: counts of enterohemorrhagic Escherichia coli and Staphylococcus aureus during storage of fresh-cut onion, cabbage, and carrot were significantly reduced, without using chemical preservative, making it possible to be used as active packaging.
Ultrasound was shown to contribute to a uniform distribution of PBAT and birch bark (genus Betula) antimicrobial extract [61].

3.1.3. Thermoplastic Starch

Thermoplastic starch (TPS), a material made from starch, water, and/or plasticizers is often considered as the most promising biodegradable material. The major drawbacks of this material are its hygroscopic nature, low gas barrier, and inadequate water barrier. By combining TPS with non-thermal processes, significant changes in material might be observed.
The electron beam irradiation was shown as the most promising method for sterilization of the TPS/polybutylene succinate (PBS) blend. It provides high efficiency in elimination of microorganisms. The electron beam can induce the cross-linking through the formation of carboxylate and carbonyl groups assigned to the irradiation reaction between the water molecules and the starch. This subsequently leads to the increased moisture resistivity (by up to 10%), higher tensile strength, improved thermal properties and changes in blend degradation [62].
Air and oxygen plasma can be efficiently used to modify the surface of cellulose fibers. Consequently, the adhesion between the TPS matrix and modified fiber is better [63,64]. Poly(hydroxybutyrate) (PHB) can be used as reinforcement in thermoplastic corn starch and treating it with sulphur hexafluoride gas (SF6) showed a higher thermal stability but weakened mechanical properties if compared to the untreated composites. Poor mechanical properties were assigned to the agglomeration of PHB particles in the starch matrix that are considered as stress concentrators and thus leading to a weak interfacial adhesion [65]. Ref. [37] used atmospheric cold plasma to improve the adhesivity of PLA and polycaprolactone (PCL) to cassava starch films. Cold plasma led to the increased surface roughness and hydrophilicity and thus improved the adhesion and delamination resistance of produced blends.
Dielectric barrier discharge at atmospheric pressure can be used to assure proper compatibility between PLA and TPS [36]. Plasma treatment can improve the overall environmental impact, but currently there is still need for further process optimization.

3.1.4. Poly(3-Hydroxybutyrate-Co-3-Hydroxyvalerate)

Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) is an aliphatic polyester belonging to the PHA family, and known for its biodegradability, non-toxicity, and biocompatibility. It is similar to the other biobased alternatives, if used alone. PHBV has serious disadvantages when compared to thermoplastics.
The poor miscibility of PHBV could be enhanced through treatment with gamma irradiation. Likewise, it was successfully blended to PLA [66] and to natural polyisoprene rubber [67]. Resulting materials had better mechanical performance [67]. Since the applied dose of gamma rays is an important factor for changes in material, for doses above 100 kGy it can be considered that the oxidative degradation of neat PHBV and neat PLA caused the main chain scissions that are responsible for a significant decrease in the average molecular weight of materials, and furtherly characteristics of their blends [66]. EB irradiation leads to changes in the chemical structure of neat PHBV, neat PLA and PHBV/PLA blend. For absorbed dose of 10 kGy, the transformation of ester groups to mainly hydroxyl groups might occur [68].

3.1.5. Cellulose Acetate

Cellulose acetate (CA) is a derivate of cellulose with excellent optical properties and high toughness. Films can be produced either by melting or solvent-casting technique. In CA films, HPP (200–400 MPa for 5 or 10 min) caused a reduction in tensile strength, Young’s modulus and an increase in elongation at break [69]. Treated films were more luminous and opaque showing also a reduction of water vapor transmission rate and better water resistance. HPP also caused delamination or slight porosity of CA films, and better mechanical stress during heat sealing (250 °C).
It was shown that γ-irradiation (cobalt-60 source up to 50 kGy) of cellulose acetate cause a decrease in the values of relative, specific, reduced and intrinsic viscosities, molar mass, hydrodynamic volume, real and ideal chain dimensions [70]. Irradiation treatment (10 kGy) also improved the quality of nanocomposite films (cellulose acetate-polyethylene glycol/clay) (reduced opacity index, improved mechanical properties, and water and oxygen permeability) [71]. An interesting book chapter covers issues related to irradiated cellulose for use in food and agriculture, with the insight in the enlarged application of irradiation-induced biodegradable polymers instead of nonbiodegradable ones [72].

3.1.6. Polyhydroxyalkanoates

Polyhydroxyalkanoates (PHA) are linear polyesters, insoluble in water that naturally occur in a variety of microorganisms. They are produced by the fermentation of renewable carbon resources and are accumulated intracellularly as energy reserves. They exhibit thermoplastic properties. The most commonly used PHAs are polyhydroxy-butyrate (PHB, C4) with a methyl group as a side chain, or poly-3-hydroxybutyrate-co-3-hydroxyvalerate (PHBV, C4 resp. C5) which is a copolymer of PHB and PHV with a methyl or ethyl side chain, respectively. Due to the longer side chain of PHV in comparison to PHB, the melting and the glass transmission temperatures are lower. This leads to a lower crystallinity and a better processing behavior of the extremely thermosensitive PHB-(co)-polymers in an extrusion process.
Picosecond pulsed laser treatment, compared to UV irradiation [73], showed its convenience for PHAs micro structuration in order to improve the biocompatibility for scaffold manufacturing in the food packaging and tissue engineering fields.
To our knowledge, there are no other scientific articles published combining PHA with non-thermal food processing.

3.1.7. Edible Coatings

The use of edible coating in combination with some non–thermal processing became a trend in the last decade. There are excellent review articles on edible film/non-thermal processing/nanomaterials [74], edible film/pulsed light [22,75], and edible coating/ozonation/gamma irradiation [76]. The prevalence of scientific articles on this subject published in science direct, only in the last 2 years is given in Figure 2. Therefore, in this article only some examples not already covered in the literature will be mentioned in order to review of possible effects on both food and applied coating material.
Gamma irradiation, in combination with EC, has been a well-studied topic in recent two decades [77,78]. Doses below 2 kGy are shown to retard sprouting of vegetables and fruits’ ripening, medium doses (from 1 to 10 kGy) to reduce pathogens (similar effect compared to conventional pasteurization), while doses above 10 kGy are required to reach a sterile food product. Irradiation can be used to enhance cross-linking in protein-based coatings (covalent protein molecules link) [24,79,80]. Irradiation in doses from 5 to 20 kGy was shown to extend the shelf-life of Hayani date fruit (Phoenix dactylifera L., Family Arecaceae) coated with poly(vinyl alcohol), PVOH, chitosan and tannic acid from 7 to 30 days [81]. Irradiation doses of 0.25 and 1.0 kGy with commercially available carnauba wax coating improved the shelf-life of tamarillo (Cyphomandra betacea) and Jujube fruit (angiosperm clade) [1]. In another study, combining chitosan coating and UV radiation (253.7 nm for 6 min) helped in controlling the respiration rate of jujube fruit (Ziziphus jujuba) whilst preserving ascorbic acid and chlorophyll [82]. Irradiation of strawberries was shown to inhibit Botrytis cinerea and other visible fungus and molds in combination with various coatings: protein/limonene/peppermint coatings (irradiation at doses of 32 kGy) [83], with milk protein/Quillaja saponaria EC (irradiation at doses of 15-35 kGy) [84] and carboxymethyl cellulose (irradiation at doses of 2 kGy) [85]. An increase in shelf-life from 9 to 19 days was also reported for banana fruit when treated with 5.87 kGy/h and combined with PVOH/carboxymethyl cellulose/tannin edible coating [86].
With regards to vegetables, carrots, tomatoes and broccoli were successfully treated whilst using EC prior to irradiation. An interesting two-step post-treatment processing of carrots showed improvement in firmness, sample weight, and color [78]. Irradiation at 32 kGy was used on pre-cut carrots coated with calcium caseinate and then samples were treated with nanoemulsion based coating enriched with citrus extract, cranberry juice and essential oils. Irradiation also led to a better mechanical properties and a water vapor permeability of used coatings. Same authors found that combining active EC (based on thymol, winter savory, Ceylon cinnamon and lemongrass) and irradiation at doses of 0.4 and 0.8 kGy kill pathogens effectively (E. coli O157:H7, L. monocytogenes, S. Typhimurium and A. niger), resulting in extended shelf-life of ready-to-eat broccoli [81].
Gamma irradiation is also known as an efficient method for meat and fish decontamination. For example, when used in combination with thyme/cannelle/oregano, the shelf-life of chicken might increase by 14 days [87].
In the past decade, pulsed light in combination with edible coatings was shown as effective in industrial proof-of-principle trials for fruits and vegetables [75]. “Golden Delicious” apples were treated with pulsed light (spectrum range of 180–1100 nm; 30 pulses; 0.3 ms, total energy accumulated 12 J/cm2) in combination with gellan gum [88] or pectin based coating [89]. Great synergistic effect resulted in reduced tissue softening and browning whilst preserving antioxidant value of apples, reducing microbial loads and without affecting freshness of apples. Similarly, [90] demonstrated an extended shelf-life of mango fruit when treated with pulsed light (8 J/cm2) and alginate coatings. Preservation of the antioxidant capacity, color, and reduced L. innocua loads make this method a promising tool for commercialization of such high nutritive fruit for countries which do not produce mango themselves [90]. Pulsed light with pectin, alginate or gellan was also used for extending the shelf-life of fresh-cut cantaloupe melon up to 28 days [91,92,93]. Treatments with chitosan resulted only in improved microbiological quality but negatively influenced ascorbic acid content and loss of fluids [92], while alginate maintained physico-chemical and nutritional quality and reduced fluid loss [93].
A combination of chitosan (1%)/mandarin essential oil (0.05%) and pulsed light (3, 6 and 12 J/cm2) on fresh-cut cucumbers and fresh green beans had no effect against L. innocua, but coating maintained tissue integrity and sample firmness [94].
Recently, in an interesting research study, the authors showed that PL of 1.32 J/cm2 did not affect albumen quality with maximum of 3.77 log CFU/egg of E. coli inactivation and thus possibility of using pulsed light with Vaseline coating on whole shell eggs for industrial application [95].
Plasma treatment (V = 60 and 70 kV, 1–5 min) of sodium caseinate results in an improvement in the hydrophilic properties, film roughness and surface oxygen content due to the increase of O−H and C=O groups [96].
Ref. [97] used ultrasonic pretreatment (19 W, 5 min at room temperature) to improve the interaction between kidney bean protein isolate and chitosan to produce films with increased opacity.
Some of the results pertaining to studies on the non-thermal effects on edible packaging are shown in Table 1.

3.2. Nanomaterials

Recent developments in nanotechnology have enabled the synthesis of nanoparticles with high stability that can be used directly in food or in food packaging materials. They are often applied to tailor-made design to improve properties of packed product. Novel process and types of nanoparticles allow reductions in degradation and cause the inactivation of incorporated nanoparticles after their application. In packaging field, nanotechnology has been used to improve the material performance (especially its barrier and thermal properties) or in order to incorporate various active compounds, such as antibiotics, antimicrobials or antioxidants [74,104,105]. Nano-materials (nanoparticles, nanoemulsions, nanocomposites, nanostructured materials) can be used as (a) new active functional packaging; (b) as new smart packaging materials such as (bio)sensing technologies for detection of nutritional and non-nutritional components, antioxidants, adulterants and toxicants; and (c) as enhancers of barrier and mechanical properties the existing food packaging materials [74,104,106,107,108,109,110,111,112,113,114,115]. In addition, they are used to extend food shelf-life, while reducing waste and ensuring adequate food safety and quality. The environmental, health and safety implications of nanomaterials in the food sector are important issue taking into account regulation and consumer perception of these materials [114].
Nanoscale fillers, such as clay and silicate nanoplatelets, silica (SiO2) nanoparticles, chitin or chitosan, can be applied into the polymer matrix to provide lighter, stronger, fire resistant, and better thermal properties of materials [106,116]. Antimicrobial nanocomposite films, made by impregnating the fillers into the polymers offer desirable barrier properties (to moisture, water vapor, gases, and solutes) for specific food products [117,118]. To our knowledge, there has been little research performed on the effect of NTP on the nano-packaging materials used for in-package food processes. Thus, in the context and the scope of this article, the focus will be done on those nanoparticles in biomaterials intended for use in combination with NTP techniques.
Some of the interesting examples found in the literature [94,119,120,121] will be presented in the following paragraphs (Table 2).
Although biobased materials have many advantages compared to petroleum-based resins, they often lack barrier properties. Combining HPP with biopolymers often results in a decrease of their barrier performance. In this concern metal nanoparticles (such as zinc, silver, or titanium) and nanofillers from graphene family (such as graphene sheets, graphene oxide, and expanded graphite) are shown to be promising enhancers of gas and water vapor barrier, thermal stability, and tailored functionality. Silver nanoparticles (nano-Ag) have been used in food packaging applications due to the remarkable antibacterial properties and high thermal stability. Since HPP can cause changes to the morphology of the polymeric materials, the mass transfer of permeants in the material or from the food to the material should be considered [123,124]. The addition of nano-Ag could impact the microstructure, and thus improve the thermal, mechanical and barrier properties of the PLA nanocomposite film treated with HPP [125]. Moreover, nano-Ag has a strong inhibitory effect on various pathogenic microorganisms such as E.coli, Neisseria gonorrhoeae, and Chlamydia trachomatis [126].
Graphene based nanoparticles have a unique conductivity, single layer formations, and strong reinforcement capability when compared to the other nanocomposites. Therefore, graphene oxide has been the most versatile and the most commonly used in production of composites and thin films for improving the gas barrier [127]. For example, in PLA, its presence leads to a significant morphological change (increased roughness) and decreased tensile strength, while if treated with HPP (300−600 MPa/15 min), glass transition and crystallization temperatures are increased indicating improvements in thermal stability. The loading concentration of graphene oxide and applied pressure are shown to play an important role in the changes caused by HPP. In other words, the barrier properties of PLA were first modified due to the presence of graphene oxides and later by the pressurization. The authors demonstrate major limitations of biodegradable single-layer composite films in a high pressure environment leaving their use in industrial purposes still questionable [32].
HPP (especially at 600 MPa) in combination with nano-TiO2 improved the mechanical (elongation-at-break) and the barrier (water vapor and oxygen) properties of the biodegradable polyvinyl alcohol (PVOH) and chitosan composite films [128]. The antibacterial activity of films was also enhanced. The HPP treated PVOH–Chitosan–TiO2 films also showed great stability in food simulants (distilled water, acetic acid, ethanol and olive oil) which makes this composite material adequate for food packaging. Cotton linen nanowhiskers processed in a high-pressure homogenizer and used as a reinforcing material in thermoplastic starch improved performance of composite material [129].
Electrically conductive polymers can be used to provide the necessary electrical conductivity needed for electrically employed treatments, such as PEF. The main disadvantage for use in food applications is a lack of biocompatibility and biodegradability and often a cytotoxic character. Recently, there has been research interest in novel non-toxic electrically conductive nanofillers made from/or in combination with natural biopolymers, such as those with graphene oxides, naturally occurring clays, or multi-walled carbon nanotubes [130]. The food packaging materials for in-pack PEF treatment should have a through-plane electrical conductivity close to the electrical conductivity of the packaged food, which is typically between 0.1–2 S/m [131]. Since many biopolymers have only in-plane conductivity, their application for in-package PEF food treatments remains subject to future investigations [132]. The combination of bioactive nanoparticles with PEF opens new opportunities in overcoming the resistance of materials and to improve inactivation efficacy without noticeable losses of food quality [132]. Ref. [133] found that the application of microsecond-range PEF in combination with the encapsulated nisin nanoparticles can significantly potentiate the efficacy of the antimicrobial treatment even against bacteria in stationary growth phase. Even though this study promises great results, authors underlined that there is still a lack of sufficient electrophoresis. Thus, it remains the major limitation of nanosecond PEF protocols in food industry where mass transfer is required.
Recently, Refs. [130,131] developed electrically conductive bionanocomposite using chitosan and reduced graphene oxide. The addition of biocomposites resulted in an increased mechanical and water resistance, in addition to the electrical properties, making this material suitable not only for use in food packaging but also other sectors (electric field processing, body sensors and electro-responsive biocompatible devices). Graphene nanoparticles can be hardly used in pure PLA since it has a weak affinity for graphene. Thus, blending it with another biodegradable polymer with a good affinity for graphene nanoparticles, like PBAT, seems a good strategy to hold high loadings of this conductive filler. Recently it was shown that confining nanofillers into the PBAT continuous phase resulted in the creation of conductive channels and good percolation networks, with an electrical conductivity of 338 S/m. Multi-walled carbon nanotubes were also used in small amounts as doping materials to provide the electrical conductivity and desirable mechanical properties to chitosan [134]. When the content of the nano-sized carbon fillers is increased, then light scattering inside the matrix becomes more probable, so transmitted light intensity decreases. The authors of [134] indicated that if the target is to increase the electrical conductivity that might be achieved with high loadings, then it is sometimes necessary to sacrifice optical transparency.
Electron beam has been recently used to improve the interfacial compatibility between polar nanofillers (graphene based or natural clays) and non-polar polymer resins such as PLA. The main principle is in removing the surface impurities and altering the surface chemical characteristics under the proper irradiation conditions. Halloysite nanotubes, which are clay particles with a tubular shape present in nature, have been recently used as reinforcing fillers. For example, after electron beam exposure, halloysite-enriched PLA samples showed increased crystallinity and consequently higher Tg value (from 310 to 316 °C of non-irradiated and irradiated samples, respectively). Additionally, at lower irradiation doses the lower water vapor permeability was measured (decrease of 20% for 20 kGy compared to 40 kGy irradiation) [135]. PLA can also be modified with the montmorillonite (MMT). An increase in the mechanical properties and oxygen barrier compared to the neat PLA was reported. This study also demonstrated that PLA nanocomposite films are suitable materials for the irradiation processing of prepacked food at doses from 1 to 10 kGy [44].
The addition of bio-CaCO3 nanoparticle in the electron-beam irradiated (100 and 200 KGy, using a 1.5 MeV electrostatic accelerator) PBAT/starch and PBAT/PLA blend improved the thermal resistance of material [136,137]. The incorporation of organomodified montmorillonite (OMMT) contributed to the enhanced miscibility, thermal stability of PHBV, PLA, and PHBV/PLA blends that is usually observed only when the clay is homogeneously dispersed. The gamma irradiation of PHBV/PLA/ OMMT with the compatibilizer lead to the oxidation reactions of ester groups, inducing the formation of hydroxyl groups, and thus improving the miscibility. Gamma irradiation at doses of 10-40 kGy was used to improve the dispersion of chitin nanowhiskers (1–5 wt %) in PCL films. Irradiation led to the reduction of chitin macroscopic domains when compared to the production without the irradiation, but no significant effect was observed depending on the irradiation dose. Additionally, irradiated materials had better mechanical properties, as well as reduced yellow discoloration of chitin by irradiation.
UV radiation can be used to accelerate the degradation of PBAT films modified with organoclay Cloiste C20A at concentration up to 5% [58]. It was also reported that the chitosan-TiO2 nano film showed a decreased transmittance in the visible light region, so UV light facilitated its photocatalytic antimicrobial effect under ambient condition [1].
The effect of cold plasma treatment (Table 2) was used to improve surface morphology, barrier properties, and the release efficiency of active substances from nanofibers [121,122]. Ref. [138] showed that the ratios of oleic acid to stearic acid and ultrasonic/microwave assisted treatment had a significant effect on the WVP and on the contact angle of prepared films. It was found that the oleic acid: stearic acid = 2:3 films had the lowest WVP value (0.1 × 10−12 g/cm s Pa) and the highest contact angle value (135°), at treatment conditions of 20 °C, 15 min, and 500 W.
The ultrasound was used for the incorporation of starch nanoparticles in PBAT/TPS blends without the addition of any chemical reagent. The ultrasound treatment resulted in the formation of starch less than 100 nm in size and of an amorphous character, lower thermal stability and low gelatinization temperature when compared with cassava starch films [139].

4. Active Packaging

If the packed food is treated with one of the non-thermal techniques, the addition of the active compound should not affect the active properties of the whole package nor its primary preservation role. Thus, the final efficiency combines the synergistic effect of both non thermal principles. In recent years, the combined use of essential oils (EOs) with NTP has attracted much attention for microbial inactivation. It is due to the fact that EOs have often been proposed as food preservatives due to their strong, wide-spectrum activity against microorganisms. However, because of the strong organoleptic impact they cannot often be used in excreted doses. In the combination with other inactivation mechanism a good efficiency might be achieved even after the application of a lower dose of the EO. An interesting review article was recently published covering the issue [140].
If the target function is the antimicrobial effect, then the NTP will be used to lower the initial microflora counts and to inhibit their enzymatic activity, while the active compounds will limit further microbial growth. The reduced growth can be achieved either by controlled release of the antimicrobial substances or by the degradation of product during the storage by controlling the gas composition and moisture in the package space.
In addition to the antimicrobial function, the NTP can also cause the oxidation of food components. For example, in protein rich food, HPP leads to the intracellular release of prooxidants and starts the catalytic oxidation reactions [141]. Then, combining novel techniques with active antioxidant packaging can be beneficial. The most recent literature examples are given in Table 3.
Irradiation (ultraviolet, gamma, electron beam, ion beam, and laser exposure [152]) is a method used in combination with active packaging (AP) in order to tailor the release behavior of the active agents from the AP systems. The major mechanism of the irradiation action on controlling the release is its ability to induce the cross-linking of functional groups of active compounds to polymer surfaces [153]. Ref. [100] found that the electron beam irradiation (60 kGy) could favor the interactions between antioxidants and the biopolymer via a free radical-mediated mechanism providing a better protection and less mobility within the matrix structure. Irradiation induced cross-linking of biobased polymers can thus reduce the effective diffusion of natural phenolics from the matrix [147,154].
For prepacked food products, an important issue is that during the irradiation treatment, the formation of free radicals in food might occur. Moreover, in food with high water content, the reaction between oxygen molecules dissolved in water with hydrogen radicals takes place resulting in the formation of free radicals that in a second step leads to their reaction with small amounts of the remaining oxygen in the packaging headspace. In order to reduce the impact of this process-induced oxidation, combining active O2 scavengers with IR can act synergistically.

5. Safety Issues

Safety of food contact materials (FCMs) and articles depends on containing substances which can migrate into food under conditions of intended use [155,156,157]. Moreover, the purpose/type of packaging must be taken into consideration especially if the active packaging is within the context. It is important to clearly distinguish the undesired interactions between the package and the food (migration of the unwanted substances) from those expected and desired, such as in active packaging. The EU Regulation 450/2009 describes that for the active packaging, the migration of active substances must not be taken in the calculation of the overall migration. Still, NTP can influence the migration of the active film ingredients. In other words, with the active packaging developments, a migration of active component becomes a desirable process. Some examples include the migration of the antioxidant agents (such as EOs) and hydro-alcoholic extracts incorporated into chitosan films. Desirable interaction between phenolic compounds from hydro-alcoholic extracts and chitosan can protect the packaged food by acting as an improved barrier against light, water, and oxygen from the outer environment, etc. Additionally, biopolymers with EOs showed exponential diffusion growth, and the active compound present in the simulant kept its antioxidant activity. EOs showed a faster release toward fatty food simulant, highlighting their potential use for fatty food [158].
As it was shown, various NTPs can lead to various changes in biobased materials, so it is also questionable if those structural changes can promote migration of additives and other residual compounds that might become food contaminants when released into foods that are in direct contact with materials. For example, irradiation (e.g., γ-rays, X-rays, accelerated electrons, and ion beams) may lead to disproportion, hydrogen abstraction, arrangements, degradation, and/or the formation of new bonds in polymer network [159]. Moreover, pure biopolymers are generally less stable and present a worse water vapor barrier compared to the conventional polymers, more additives are usually used for their production. Therefore, some undesirable interactions and consequent migration of substances may occur [160]. Nonetheless, and to the best of our knowledge, there are substantial gaps in the scientific information available dealing with the effect of NTP on the interactions on the interphase between food and packaging.
Safety concerns associated with the migration of nanoparticles from the packaging material into the food and their impact on the consumer’s health have been in the focus of many papers [161,162,163,164,165,166]. Since 2006, the European Food Safety Authority (EFSA) intensively follows the developments in nanotechnology including reviewing the current state of knowledge and latest developments in nanotechnology regarding food and feed. Information from the European Commission on the regulatory aspects of nanomaterials are published in 2008 [167]. So far, this is an ongoing issue, and additional studies must be performed to examine the risk of nanoparticles due to their properties and capacity for absorption and migration and the effect on human health [168,169].
According to the studies performed, there are many factors that should be taken into account when performing such research (such as particle dissolution, surface morphology of the particles, concentration, surface energy, aggregation, and adsorption).
The effects of the NTP on the food-packaging interactions, i.e., on the chemical migration, are the focus of review paper [170]. More than ten years ago, authors asserted that only a few publications were found on this issue related to the active and the biodegradable packaging systems. The situation has not changed a lot since then, and this observation is valid for the nanomaterials as well. Nanomaterials, as any other material, may have a diverse set of properties that need to be determined and taken into account [171]. However, the few papers published so far are sometimes contradictory with a lot of controversy about the toxicity of nanoclays [172,173].
For the packaging materials used in irradiation process, it is required that they should not transmit any radiolysis product to foods. Formation of radiolysis product (such as low molecular weight aldehydes, and acids) depends on the absorbed dose, atmosphere, temperature, time after the irradiation, and food simulant used [174]. Due to the possible occurrence of radiolysis product resulting from the scissioning or the cross-linking of polymers, as well as from the reactions of additives (antioxidants, stabilizers, etc.), their migration must be evaluated in any pre-market safety assessment prior to their commercial use [175].
UV irradiation is one of the primary causes of polymer degradation. It can lead to the formation of oligomers and monomers. Since they are detached from the structured polymer network, then they can migrate into food and influence the biodegradation. The authors of [176] found that no unwanted substances migrated from PLA and cellulose based materials into aqueous food simulants aimed for packaging of fresh-cut cherry tomatoes after UV exposure.
The trace amounts of TiO2 from the PVOH/Chitosan–TiO2 film was detected in an olive oil food simulant at 23 °C after the HPP treatment (200–400 MPa), while no other detectable substances were found in distilled water, acetic acid and ethanol [128]. HPP treatment significantly reduced the migration of TiO2 nanoparticles from the films, probably by decreasing the molecular chain mobility of PLA while tightening the network structure in nanocomposites (better stiffness and tortuosity) [126]. In this context, PLA was also shown as suitable for HPP due to the low scalping of aroma compounds from food [35].
The migration of various packaging additives (antioxidant, Irganox 1076, and ultraviolet light absorber, Uvitex OB) from the commercial PLA, during and after two high-pressure/temperature treatments was measured. The effects of HPP pasteurization (800 MPa for 5 min, from 20 to 40 °C) and HPP sterilization (800 MPa for 5 min, from 90 to 115 °C) were compared with the conventional pasteurization (30 min at 0.1 MPa and 63 °C) and sterilization (20 min at 121 °C) treatments. Migration to the food simulants (distilled water, 3% acetic acid, 15% ethanol and olive oil) was evaluated. The migration of Uvitex OB was very low or no detectable for all the cases studied and comparable to commercial LLDPE [177].
After the 90-days of storage, the migration of nano-Ag particles (AgNPs) from the PLA/AgNPs composite film treated under 200 MPa was low, while it was accelerated under the 400 MPa HPP [178].
Chemical migrations have not been observed when using biopolymer-based food packaging, such as PLA films treated with cold plasma [11].

6. Conclusions

In the last decade the scientific community is facing an intensive research in emerging food processing technologies looking for products with excellent quality and adequate safety. Parallel to this, an enormous effort is also made in the field of food packaging, aiming to decrease the negative effects of synthetic polymers not only on food product but on the entire environment as well. However, the introduction of new and different packaging materials is under debate, and requires time for their safe application to specific food products. Knowing the number of combinations of existing materials, as well as searching for environmentally friendly ones, implied that this is a never-ending task. Furthermore, the effect of the processing treatments on both food product and the packaging material should be simultaneously investigated in order to result in safe food products on the market. Thus, the selection of the non-thermal food treatment and the optimal eco-friendly packaging can result with products that are acceptable not only to consumers (due to their safety and high nutritional and sensorial attributes) but also to the environment.

Author Contributions

Conceptualization, M.K. and D.G.; writing—original draft preparation, M.K., D.G., K.G.; writing—review and editing, M.K., D.G., M.Š., K.G., M.B.; funding acquisition, M.B. All authors have read and agreed to the published version of the manuscript.

Funding

This research received no external funding.

Institutional Review Board Statement

Not applicable.

Data Availability Statement

Not applicable.

Acknowledgments

This work was supported by the project “Increasing the development of new products and services arising from research and development activities-phase II”: Development of innovative products to increase food quality, KK.01.2.1.02.0282.

Conflicts of Interest

The authors declare no conflict of interest.

List of Abbreviations

AbbreviationsDescription
AMAntimicrobial
AOAntioxidant
APActive packaging
CACellulose acetate
EABElongation at break
ECEdible coating
EFSAEuropean Food Safety Authority
EOsEssential oils
EVAC (EVA)Ethylene vinyl acetate
EVOH (EVAL)Ethylene vinyl alcohol
FCMsFood contact materials
FDAFood and Drug Administration
HPPHigh pressure processing
HPPMP/HPPPaneer prepared with HPP treated milk
HTMPHeat treated milk paneer
HTMP/LABHTMP/lactic acid bacteria
IRInfrared light
LLDPELinear low-density polyethylene
MMTMontmorillonite
MWMolecular weight
NPsNanoparticles
NTPNon-thermal processing technologies
OMMTOrganomodified MMT
OTROxygen transmission rate
P3HBPoly-3-hydroxybutyrate
P3HB4HBPoly(3-hydroxybutyrate-co-4-hydroxybutyrate)
P3HBHHXP3HB-co-3-hydroxyhexanoate
PAPolyamide (Nylon)
PBATPoly (butylene adipate-co-terephthalate)
PCLPolycaprolactone
PEPolyethylene
PEFPulsed electric field
PETPoly(ethylene-terephthalate)
PHAPolyhydroxyalkanoates
PHBPolyhydroxybutyrate
PHBVPoly(3-hydroxybutyrate-co-3-hydroxyvalerate),
PLAPolylactic acid
PPPolypropylene
PTPhlorotannin
PVOH (PVAL, PVA)Poly(vinyl alcohol)
TPSThermoplastic starch
TSTensile strength
UVUltraviolet
UV-CUV light with wavelengths between 200–280 nm
WVPWater vapour permeability
WVTRWater vapour transmission rate

References

  1. Abad, J.; Valencia-Chamorro, S.; Castro, A.; Vasco, C. Studying the effect of combining two nonconventional treatments, gamma irradiation and the application of an edible coating, on the postharvest quality of tamarillo (Solanum betaceum Cav.) fruits. Food Control 2017, 72, 319–323. [Google Scholar] [CrossRef]
  2. Baek, N.; Han, J.H.; Pascall, M.A. Packaging for nonthermal processing of food. In Packaging for Nonthermal Processing of Food; John Wiley & Sons: New York, NY, USA, 2018; pp. 1–13. [Google Scholar]
  3. Rodrigues, C.; Souza, V.G.L.; Coelhoso, I.; Fernando, A.L. Bio-based sensors for smart food packaging—Current applications and future trends. Sensors 2021, 21, 2148. [Google Scholar] [CrossRef] [PubMed]
  4. Salgado, P.R.; Di Giorgio, L.; Musso, Y.S.; Mauri, A.N. Recent developments in smart food packaging focused on biobased and biodegradable polymers. Front. Sustain. Food Syst. 2021, 5, 630393. [Google Scholar] [CrossRef]
  5. Carina, D.; Sharma, S.; Jaiswal, A.K.; Jaiswal, S. Seaweeds polysaccharides in active food packaging: A review of recent progress. Trends Food Sci. Technol. 2021, 110, 559–572. [Google Scholar] [CrossRef]
  6. Zhao, Y.-M.; de Alba, M.; Sun, D.-W.; Tiwari, B. Principles and recent applications of novel non-thermal processing technologies for the fish industry—a review. Crit. Rev. Food Sci. Nutr. 2018, 59, 728–742. [Google Scholar] [CrossRef] [PubMed]
  7. Abera, G.; Yildiz, F. Review on high-pressure processing of foods. Cogent Food Agric. 2019, 5, 1568725. [Google Scholar] [CrossRef]
  8. Chacha, J.S.; Zhang, L.; Ofoedu, C.E.; Suleiman, R.A.; Dotto, J.M.; Roobab, U.; Agunbiade, A.O.; Duguma, H.T.; Mkojera, B.T.; Hossaini, S.M.; et al. Revisiting non-thermal food processing and preservation methods—Action mechanisms, pros and cons: A technological update (2016–2021). Foods 2021, 10, 1430. [Google Scholar] [CrossRef]
  9. Huang, H.-W.; Wu, S.-J.; Lu, J.-K.; Shyu, Y.-T.; Wang, C.-Y. Current status and future trends of high-pressure processing in food industry. Food Control 2017, 72, 1–8. [Google Scholar] [CrossRef]
  10. Ahmed, J.; Varshney, S.K.; Ramaswamy, H.S. Effect of high pressure treatment on thermal and rheological properties of lentil flour slurry. LWT-Food Sci. Technol. 2009, 42, 1538–1544. [Google Scholar] [CrossRef]
  11. Pankaj, S.K.; Bueno-Ferrer, C.; Misra, N.N.; Milosavljević, V.; O’Donnell, C.P.; Bourke, P.; Keener, K.M.; Cullen, P.J. Applications of cold plasma technology in food packaging. Trends Food Sci. Technol. 2014, 35, 5–17. [Google Scholar] [CrossRef]
  12. Jordá-Vilaplana, A.; Fombuena, V.; García-García, D.; Samper, M.D.; Sánchez-Nácher, L. Surface modification of polylactic acid (PLA) by air atmospheric plasma treatment. Eur. Polym. J. 2014, 58, 23–33. [Google Scholar] [CrossRef]
  13. Pankaj, S.; Wan, Z.; Keener, K. Effects of cold plasma on food quality: A review. Foods 2018, 7, 4. [Google Scholar] [CrossRef] [Green Version]
  14. Misra, N.N.; Yepez, X.; Xu, L.; Keener, K. In-package cold plasma technologies. J. Food Eng. 2019, 244, 21–31. [Google Scholar] [CrossRef]
  15. Moutiq, R.; Misra, N.N.; Mendonça, A.; Keener, K. In-package decontamination of chicken breast using cold plasma technology: Microbial, quality and storage studies. Meat Sci. 2020, 159, 107942. [Google Scholar] [CrossRef]
  16. Roodenburg, B. Pulsed Electric Field treatment of packaged food. Ph.D. Thesis, Technische Universiteit Delft, Delft, The Netherlads, 7 December 2011. [Google Scholar]
  17. Gabrić, D.; Barba, F.; Roohinejad, S.; Gharibzahedi, S.M.T.; Radojčin, M.; Putnik, P.; Bursać Kovačević, D. Pulsed electric fields as an alternative to thermal processing for preservation of nutritive and physicochemical properties of beverages: A review. J. Food Process Eng. 2018, 41, 12638. [Google Scholar] [CrossRef]
  18. Arshad, R.N.; Abdul-Malek, Z.; Jusoh, Y.M.M.; Radicetti, E.; Tedeschi, P.; Mancinelli, R.; Lorenzo, J.M.; Aadil, R.M. Sustainable electroporator for continuous pasteurisation: Design and performance evaluation with orange juice. Sustainability 2022, 14, 1896. [Google Scholar] [CrossRef]
  19. Galić, K.; Ščetar, M.; Kurek, M. The benefits of processing and packaging. Trends Food Sci. Technol. 2011, 22, 127–137. [Google Scholar] [CrossRef]
  20. Abida, J.; Rayees, B.; Masoodi, F.A. Pulsed light technology: A novel method for food preservation. Int. Food Res. J. 2014, 21, 839–848. [Google Scholar]
  21. Gómez-López, V.M.; Ragaert, P.; Debevere, J.; Devlieghere, F. Pulsed light for food decontamination: A review. Trends Food Sci. Technol. 2007, 18, 464–473. [Google Scholar] [CrossRef]
  22. John, D.; Ramaswamy, H.S. Pulsed light technology to enhance food safety and quality: A mini-review. Curr. Opin. Food Sci. 2018, 23, 70–79. [Google Scholar] [CrossRef]
  23. Alarcon-Rojo, A.D.; Peña-González, E.; García- Galicia, I.; Carrillo-López, L.; Huerta-Jiménez, M.; Reyes- Villagrana, R.; Janacua-Vidales, H. Ultrasound application to improve meat quality. In Descriptive Food Science; Intech Open: London, UK, 2018; pp. 153–172. [Google Scholar]
  24. Beikzadeh, S.; Ghorbani, M.; Shahbazi, N.; Izadi, F.; Pilevar, Z.; Mortazavian, A.M. The effects of novel thermal and nonthermal technologies on the properties of edible food packaging. Food Eng. Rev. 2020, 12, 333–345. [Google Scholar] [CrossRef]
  25. Ščetar, M.; Daniloski, D.; Tinjić, M.; Kurek, M.; Galić, K. Effect of ultrasound treatment on barrier changes of polymers before and after exposure to food simulants. Polymers 2022, 14, 990. [Google Scholar] [CrossRef] [PubMed]
  26. Fabbri, P.; Viaggi, D.; Cavani, F.; Bertin, L.; Michetti, M.; Carnevale, E.; Ochoa, J.V.; Martinez, G.A.; Degli Esposti, M.; Fischer, P.K.; et al. Top Emerging Bio-Based Products, Their Properties and Industrial Applications. Available online: https://www.ecologic.eu/sites/default/files/publication/2018/3513-top-emerging-bio-based-products.pdf (accessed on 18 July 2022).
  27. Conn, R.E.; Kolstad, J.J.; Borzelleca, J.F.; Dixler, D.S.; Filer, L.J.; Ladu, B.N.; Pariza, M.W. Safety assessment of polylactide (PLA) for use as a food-contact polymer. Food Chem. Toxicol. 1995, 33, 273–283. [Google Scholar] [CrossRef] [PubMed]
  28. Szafranska, Natural Controlled-Releasing Antifungal Film ANTIPACKTM AF. Available online: https://www.handary.com/product-show-Antipack-AF-Bio-degradable-active-antifungal-film (accessed on 29 July 2022).
  29. Jem, K.J.; Tan, B. The development and challenges of poly (lactic acid) and poly (glycolic acid). Adv. Ind. Eng. Polym. Res. 2020, 3, 60–70. [Google Scholar] [CrossRef]
  30. Fleckenstein, B.S.; Sterr, J.; Langowski, H.-C. The effect of high pressure processing on the integrity of polymeric packaging - analysis and categorization of occurring defects. Packag. Technol. Sci. 2014, 27, 83–103. [Google Scholar] [CrossRef]
  31. Ahmed, J.; Mulla, M.; Arfat, Y.A. Application of high-pressure processing and polylactide/cinnamon oil packaging on chicken sample for inactivation and inhibition of Listeria monocytogenes and Salmonella Typhimurium, and post-processing film properties. Food Control 2017, 78, 160–168. [Google Scholar] [CrossRef]
  32. Ahmed, J.; Mulla, M.Z.; Vahora, A.; Bher, A.; Auras, R. Morphological, barrier and thermo-mechanical properties of high-pressure treated polylactide graphene oxide reinforced composite films. Food Packag. Shelf Life 2021, 29, 100702. [Google Scholar] [CrossRef]
  33. Mauricio-Iglesias, M.; Peyron, S.; Chalier, P.; Gontard, N. Scalping of four aroma compounds by one common (LDPE) and one biosourced (PLA) packaging materials during high pressure treatments. J. Food Eng. 2011, 102, 9–15. [Google Scholar] [CrossRef]
  34. Galotto, M.J.; Ulloa, P.A.; Hernández, D.; Fernández-Martín, F.; Gavara, R.; Guarda, A. Mechanical and thermal behaviour of flexible food packaging polymeric films materials under high pressure/temperature treatments. Packag. Technol. Sci. 2008, 21, 297–308. [Google Scholar] [CrossRef]
  35. Cubeddu, A.; Fava, P.; Pulvirenti, A.; Haghighi, H.; Licciardello, F. Suitability assessment of PLA bottles for high-pressure processing of apple juice. Foods 2021, 10, 295. [Google Scholar] [CrossRef] [PubMed]
  36. Benetto, E.; Jury, C.; Igos, E.; Carton, J.; Hild, P.; Vergne, C.; Di Martino, J. Using atmospheric plasma to design multilayer film from polylactic acid and thermoplastic starch: A screening Life Cycle Assessment. J. Clean. Prod. 2015, 87, 953–960. [Google Scholar] [CrossRef]
  37. Heidemann, H.M.; Dotto, M.E.R.; Laurindo, J.B.; Carciofi, B.A.M.; Costa, C. Cold plasma treatment to improve the adhesion of cassava starch films onto PCL and PLA surface. Colloids Surf. Physicochem. Eng. Aspects 2019, 580, 123739. [Google Scholar] [CrossRef]
  38. Chen, G.; Ali, F.; Dong, S.; Yin, Z.; Li, S.; Chen, Y. Preparation, characterization and functional evaluation of chitosan-based films with zein coatings produced by cold plasma. Carbohydr. Polym. 2018, 202, 39–46. [Google Scholar] [CrossRef]
  39. Hu, S.; Li, P.; Wei, Z.; Wang, J.; Wang, H.; Wang, Z. Antimicrobial activity of nisin-coated polylactic acid film facilitated by cold plasma treatment. J. Appl. Polym. Sci. 2018, 135, 46844. [Google Scholar] [CrossRef]
  40. Grewell, D.; Srinivasan, G.; Cochran, E. Depolymerization of post-consumer polylactic acid products. J. Renew. Mater. 2014, 2, 157–165. [Google Scholar] [CrossRef] [Green Version]
  41. Zhang, R.; Lan, W.; Ji, T.; Sameen, D.E.; Ahmed, S.; Qin, W.; Liu, Y. Development of polylactic acid/ZnO composite membranes prepared by ultrasonication and electrospinning for food packaging. LWT 2021, 135, 110072. [Google Scholar] [CrossRef]
  42. Jin, T.Z.; Guo, M.; Yang, R. Combination of pulsed electric field processing and antimicrobial bottle for extending microbiological shelf-life of pomegranate juice. Innov. Food Sci. Emerg. Technol. 2014, 26, 153–158. [Google Scholar] [CrossRef]
  43. Madera-Santana, T.J.; Meléndrez, R.; González-García, G.; Quintana-Owen, P.; Pillai, S.D. Effect of gamma irradiation on physicochemical properties of commercial poly(lactic acid) clamshell for food packaging. Radiat. Phys. Chem. 2016, 123, 6–13. [Google Scholar] [CrossRef]
  44. Salvatore, M.; Marra, A.; Duraccio, D.; Shayanfar, S.; Pillai, S.D.; Cimmino, S.; Silvestre, C. Effect of electron beam irradiation on the properties of polylactic acid/montmorillonite nanocomposites for food packaging applications. J. Appl. Polym. Sci. 2016, 133, 42219. [Google Scholar] [CrossRef]
  45. Zivanovic, S. Electron beam processing to improve the functionality of biodegradable food packaging. In Electron Beam Pasteurization and Complementary Food Processing Technologies; Elsevier: Amsterdam, The Netherlands, 2015; pp. 279–294. [Google Scholar]
  46. Cairns, M.-L.; Sykes, A.; Dickson, G.R.; Orr, J.F.; Farrar, D.; Dumba, A.; Buchanan, F.J. Through-thickness control of polymer bioresorption via electron beam irradiation. Acta Biomater. 2011, 7, 548–557. [Google Scholar] [CrossRef]
  47. Huang, Y.; Gohs, U.; Müller, M.T.; Zschech, C.; Wiessner, S. Electron beam treatment of polylactide at elevated temperature in nitrogen atmosphere. Radiat. Phys. Chem. 2019, 159, 166–173. [Google Scholar] [CrossRef]
  48. Krul’, L.P.; Butovskaya, G.V.; Fedorenko, A.A.; Roginets, L.P.; Sal’nikova, I.A. Gamma- and electron beam radiation-induced degradation of poly-L-lactide. High Energ. Chem. 2020, 54, 136–141. [Google Scholar] [CrossRef]
  49. Zhao, Y.; Li, Q.; Wang, B.; Wang, Y.; Liu, C.; Shen, C. Effect of electron beam irradiation dose on the properties of commercial biodegradable poly(lactic acid), poly(butylenes adipate-co-terephthalate) and their blends. Nucl. Instrum. Methods Phys. Res. Sect. B Beam Interact. Mater. At. 2020, 478, 131–136. [Google Scholar] [CrossRef]
  50. Mansouri, M.; Berrayah, A.; Beyens, C.; Rosenauer, C.; Jama, C.; Maschke, U. Effects of electron beam irradiation on thermal and mechanical properties of poly(lactic acid) films. Polym. Degrad. Stab. 2016, 133, 293–302. [Google Scholar] [CrossRef]
  51. Zhang, W.; Zhang, Y.; Chen, Y. Modified Brittle poly(lactic acid) by biodegradable hyperbranched poly(ester amide). Iran. Polym. J. 2008, 17, 891–898. [Google Scholar]
  52. Tábi, T. The application of the synergistic effect between the crystal structure of poly(lactic acid) (PLA) and the presence of ethylene vinyl acetate copolymer (EVA) to produce highly ductile PLA/EVA blends. J. Therm. Anal. Calorim. 2019, 138, 1287–1297. [Google Scholar] [CrossRef] [Green Version]
  53. Luchian-Lupu, A.-M.; Zaharescu, T.; Lungulescu, E.-M.; Râpă, M.; Iovu, H. Availability of PLA/SIS blends for packaging and medical applications. Radiat. Phys. Chem. 2020, 172, 108696. [Google Scholar] [CrossRef]
  54. Jian, J.; Xiangbin, Z.; Xianbo, H. An overview on synthesis, properties and applications of poly(butylene-adipate-co-terephthalate)–PBAT. Adv. Ind. Eng. Polym. Res. 2020, 3, 19–26. [Google Scholar] [CrossRef]
  55. Hwang, I.-T.; Jung, C.-H.; Kuk, I.-S.; Choi, J.-H.; Nho, Y.-C. Electron beam-induced crosslinking of poly(butylene adipate-co-terephthalate). Nucl. Instrum. Methods Phys. Res. Sect. B Beam Interact. Mater. At. 2010, 268, 3386–3389. [Google Scholar] [CrossRef]
  56. Iuliano, A.; Nowacka, M.; Rybak, K.; Rzepna, M. The effects of electron beam radiation on material properties and degradation of commercial PBAT/PLA blend. J. Appl. Polym. Sci. 2019, 137, 48462. [Google Scholar] [CrossRef]
  57. Samantaray, P.K.; Ellingford, C.; Farris, S.; O’Sullivan, D.; Tan, B.; Sun, Z.; McNally, T.; Wan, C. Electron beam-mediated cross-linking of blown film-extruded biodegradable PGA/PBAT blends toward high toughness and low oxygen permeation. ACS Sustain. Chem. Eng. 2022, 10, 1267–1276. [Google Scholar] [CrossRef]
  58. Falcão, G.A.M.; Almeida, T.G.; Bardi, M.A.G.; Carvalho, L.H.; Canedo, E.L. PBAT/organoclay composite films—part 2: Effect of UV aging on permeability, mechanical properties and biodegradation. Polym. Bull. 2018, 76, 291–301. [Google Scholar] [CrossRef]
  59. Xie, J.; Yan, Y.; Fan, S.; Min, X.; Wang, L.; You, X.; Jia, X.; Waterhouse, G.I.N.; Wang, J.; Xu, J. Prediction model of photodegradation for PBAT/PLA mulch films: Strategy to fast evaluate service life. Environ. Sci. Technol. 2022, 56, 9041–9051. [Google Scholar] [CrossRef]
  60. Kim, H.-J.; Lee, C.-L.; Yoon, K.-S.; Rhim, J.-W. Synergistic effect of UV-C LED irradiation and PLA/PBAT-based antimicrobial packaging film on fresh-cut vegetables. Food Control 2022, 138, 109027. [Google Scholar] [CrossRef]
  61. Kirsh, I.; Frolova, Y.; Beznaeva, O.; Bannikova, O.; Gubanova, M.; Tveritnikova, I.; Romanova, V.; Filinskaya, Y. Influence of the ultrasonic treatment on the properties of polybutylene adipate terephthalate, modified by antimicrobial additive. Polymers 2020, 12, 2412. [Google Scholar] [CrossRef]
  62. Iuliano, A.; Fabiszewska, A.; Kozik, K.; Rzepna, M.; Ostrowska, J.; Dębowski, M.; Plichta, A. Effect of electron-beam radiation and other sterilization techniques on structural, mechanical and microbiological properties of thermoplastic starch blend. J. Polym. Environ. 2020, 29, 1489–1504. [Google Scholar] [CrossRef]
  63. Fazeli, M.; Florez, J.P.; Simão, R.A. Improvement in adhesion of cellulose fibers to the thermoplastic starch matrix by plasma treatment modification. Compos. Part B Eng. 2019, 163, 207–216. [Google Scholar] [CrossRef]
  64. de Farias, J.G.G.; Cavalcante, R.C.; Canabarro, B.R.; Viana, H.M.; Scholz, S.; Simão, R.A. Surface lignin removal on coir fibers by plasma treatment for improved adhesion in thermoplastic starch composites. Carbohydr. Polym. 2017, 165, 429–436. [Google Scholar] [CrossRef]
  65. Florez, J.P.; Fazeli, M.; Simão, R.A. Preparation and characterization of thermoplastic starch composite reinforced by plasma-treated poly (hydroxybutyrate) PHB. Int. J. Biol. Macromol. 2019, 123, 609–621. [Google Scholar] [CrossRef]
  66. Silvestre, C.; Cimmino, S.; Stoleru, E.; Vasile, C. Application of radiation technology to food packaging. In Applications of Ionizing Radiation in Materials Processing; Sun, Y., Chmielewski, A.G., Eds.; Institute of Nuclear Chemistry and Technology: Warszawa, Poland, 2017; pp. 461–484. [Google Scholar]
  67. Chutamas, M.; Jackapon, S.; Sriroth, K.R. Evaluation of gamma radiation on NR/PHBV blends. Appl. Mech. Mater. 2013, 300–301, 1325–1329. [Google Scholar] [CrossRef]
  68. Zembouai, I.; Kaci, M.; Bruzaud, S.; Pillin, I.; Audic, J.-L.; Shayanfar, S.; Pillai, S.D. Electron beam radiation effects on properties and ecotoxicity of PHBV/PLA blends in presence of organo-modified montmorillonite. Polym. Degrad. Stab. 2016, 132, 117–126. [Google Scholar] [CrossRef]
  69. Gonçalves, S.M.; Chávez, D.W.H.; Oliveira, L.M.d.; Sarantópoulos, C.I.G.d.L.; Carvalho, C.W.P.d.; Melo, N.R.d.; Rosenthal, A. Effects of high hydrostatic pressure processing on structure and functional properties of biodegradable film. Heliyon 2020, 6, e05213. [Google Scholar] [CrossRef] [PubMed]
  70. El-Ashhab, F.; Sheha, L.; Abdalkhalek, M.; Khalaf, H.A. The influence of gamma irradiation on the intrinsic properties of cellulose acetate polymers. J. Assoc. Arab. Univ. Basic Appl. Sci. 2013, 14, 46–50. [Google Scholar] [CrossRef] [Green Version]
  71. El-Rehim, H.A.; Kamal, H.; Hegazy, E.-S.A.; Soliman, E.-S.; Sayed, A. Use of gamma rays to improve the mechanical and barrier properties of biodegradable cellulose acetate nanocomposite films. Radiat. Phys. Chem. 2018, 153, 180–187. [Google Scholar] [CrossRef]
  72. Hossain, M.A.; Shourove, J.H. Prospects and probabilities of irradiated cellulose and carrageenan in food and agricultural industries. In Radiation-Processed Polysaccharides: Emerging Roles in Agriculture; Elseavier: Amsterdam, The Netherlands, 2021; pp. 155–1771. [Google Scholar]
  73. Ortiz, R.; Basnett, P.; Roy, I.; Quintana, I. Picosecond Laser Ablation of Polyhydroxyalkanoates (PHAs): Comparative Study of Neat and Blended Material Response. Polymers 2020, 12, 127. [Google Scholar] [CrossRef] [PubMed] [Green Version]
  74. Dash, K.K.; Deka, P.; Bangar, S.P.; Chaudhary, V.; Trif, M.; Rusu, A. Applications of inorganic nanoparticles in food packaging: A comprehensive review. Polymers 2022, 14, 521. [Google Scholar] [CrossRef]
  75. Pirozzi, A.; Pataro, G.; Donsi, F.; Ferrari, G. Edible Coating and Pulsed Light to Increase the Shelf Life of Food Products. Food Eng. Rev. 2021, 13, 544–569. [Google Scholar] [CrossRef]
  76. Maherani, B.; Khlifi, M.A.; Salmieri, S.; Lacroix, M. Microemulsion-based biopreservatives and γ-irradiation as combined treatments to provide healthy and safe orange juice. J. Food Process. Preserv. 2019, 43, 13909. [Google Scholar] [CrossRef]
  77. Ben-Fadhel, Y.; Saltaji, S.; Khlifi, M.A.; Salmieri, S.; Dang Vu, K.; Lacroix, M. Active edible coating and gamma-irradiation as cold combined treatments to assure the safety of broccoli florets (Brassica oleracea L.). Int. J. Food Microbiol. 2017, 241, 30–38. [Google Scholar] [CrossRef]
  78. Ben-Fadhel, Y.; Cingolani, M.C.; Li, L.; Chazot, G.; Salmieri, S.; Horak, C.; Lacroix, M. Effect of γ-irradiation and the use of combined treatments with edible bioactive coating on carrot preservation. Food Packag. Shelf Life 2021, 28, 100635. [Google Scholar] [CrossRef]
  79. Morehouse, K.M.; Komolprasert, V. Irradiation of food and packaging: An overview. In Irradiation of Food and Packaging; ACS Symposium Series; ACS Publications: Washington, DC, USA, 2004; pp. 1–11. [Google Scholar]
  80. Caillet, S.; Millette, M.; Turgis, M.; Salmieri, S.; Lacroix, M. Influence of antimicrobial compounds and modified atmosphere packaging on radiation sensitivity of Listeria monocytogenes present in ready-to-use carrots (Daucus carota). J. Food Prot. 2006, 69, 221–227. [Google Scholar] [CrossRef] [PubMed]
  81. El-Dein, A.E.; Khozemy, E.E.; Farag, S.A.; Abd El-Hamed, N.; Dosoukey, I.M. Effect of edible co-polymers coatings using γ-irradiation on Hyani date fruit behavior during marketing. Int. J. Biol. Macromol. 2018, 117, 851–857. [Google Scholar] [CrossRef] [PubMed]
  82. Zhang, S.; Yu, Y.; Xiao, C.; Wang, X.; Lei, Y. Effect of ultraviolet irradiation combined with chitosan coating on preservation of jujube under ambient temperature. LWT-Food Sci. Technol. 2014, 57, 749–754. [Google Scholar] [CrossRef]
  83. Vu, K.D.; Hollingsworth, R.G.; Salmieri, S.; Takala, P.N.; Lacroix, M. Development of bioactive coatings based on γ-irradiated proteins to preserve strawberries. Radiat. Phys. Chem. 2012, 81, 1211–1214. [Google Scholar] [CrossRef]
  84. Zúñiga, G.E.; Junqueira-Gonçalves, M.P.; Pizarro, M.; Contreras, R.; Tapia, A.; Silva, S. Effect of ionizing energy on extracts of Quillaja saponaria to be used as an antimicrobial agent on irradiated edible coating for fresh strawberries. Radiat. Phys. Chem. 2012, 81, 64–69. [Google Scholar] [CrossRef]
  85. Hussain, P.R.; Dar, M.A.; Wani, A.M. Effect of edible coating and gamma irradiation on inhibition of mould growth and quality retention of strawberry during refrigerated storage. Int. J. Food Sci. Technol. 2012, 47, 2318–2324. [Google Scholar] [CrossRef]
  86. Senna, M.M.H.; Al-Shamrani, K.M.; Al-Arifi, A.S. Edible coating for shelf-life extension of fresh banana fruit based on gamma irradiated plasticized poly(vinyl alcohol)/carboxymethyl cellulose/tannin composites. Mater. Sci. Appl. 2014, 5, 395–415. [Google Scholar] [CrossRef] [Green Version]
  87. Shankar, S.; Karboune, S.; Salmieri, S.; Lacroix, M. Development of antimicrobial formulation based on essential oils and gamma irradiation to increase the shelf life of boneless chicken thighs. Radiat. Phys. Chem. 2022, 192, 109893. [Google Scholar] [CrossRef]
  88. Moreira, M.R.; Tomadoni, B.; Martín-Belloso, O.; Soliva-Fortuny, R. Preservation of fresh-cut apple quality attributes by pulsed light in combination with gellan gum-based prebiotic edible coatings. LWT-Food Sci. Technol. 2015, 64, 1130–1137. [Google Scholar] [CrossRef] [Green Version]
  89. Moreira, M.R.; Álvarez, M.V.; Martín-Belloso, O.; Soliva-Fortuny, R. Effects of pulsed light treatments and pectin edible coatings on the quality of fresh-cut apples: A hurdle technology approach. J. Sci. Food Agric. 2017, 97, 261–268. [Google Scholar] [CrossRef] [Green Version]
  90. Salinas-Roca, B.; Soliva-Fortuny, R.; Welti-Chanes, J.; Martín-Belloso, O. Effect of pulsed light, edible coating, and dipping on the phenolic profile and antioxidant potential of fresh-cut mango. J. Food Process. Preserv. 2018, 42, 13591. [Google Scholar] [CrossRef]
  91. Koh, P.C.; Noranizan, M.A.; Nur Hanani, Z.A.; Karim, R.; Rosli, S.Z. Application of edible coatings and repetitive pulsed light for shelf life extension of fresh-cut cantaloupe (Cucumis melo L. reticulatus cv. Glamour). Postharvest Biol. Technol. 2017, 129, 64–78. [Google Scholar] [CrossRef]
  92. Koh, P.C.; Noranizan, M.A.; Karim, R.; Nur Hanani, Z.A.; Rosli, S.Z.; Hambali, N.H. Enzymatic activity of alginate coated and pulsed light treated fresh-cut cantaloupes (Cucumis melo L. var. reticulatus cv. Glamour) during chilled storage. Int. Food Res. J. 2019, 26, 547–556. [Google Scholar]
  93. Koh, P.C.; Noranizan, M.A.; Karim, R.; Nur Hanani, Z.A.; Lasik-Kurdyś, M. Combination of alginate coating and repetitive pulsed light for shelf life extension of fresh-cut cantaloupe (Cucumis melo L. reticulatus cv. Glamour). J. Food Process. Preserv. 2018, 42, 13786. [Google Scholar] [CrossRef]
  94. Donsì, F.; Marchese, E.; Maresca, P.; Pataro, G.; Vu, K.D.; Salmieri, S.; Lacroix, M.; Ferrari, G. Green beans preservation by combination of a modified chitosan based-coating containing nanoemulsion of mandarin essential oil with high pressure or pulsed light processing. Postharvest Biol. Technol. 2015, 106, 21–32. [Google Scholar] [CrossRef]
  95. Wang, B.; Wei, W.; Aputexiakere, J.; Li, Y.; Ma, H. Surface decontamination of whole eggs using pulsed light technology and shelf life study of combined pulsed light and vaseline coating during room temperature storage. Food Control 2022, 137, 108411. [Google Scholar] [CrossRef]
  96. Pankaj, S.K.; Bueno-Ferrer, C.; Misra, N.N.; O’Neill, L.; Tiwari, B.K.; Bourke, P.; Cullen, P.J. Physicochemical characterization of plasma-treated sodium caseinate film. Food Res. Int. 2014, 66, 438–444. [Google Scholar] [CrossRef]
  97. Fan, J.-M.; Ma, W.; Liu, G.-Q.; Yin, S.-W.; Tang, C.-H.; Yang, X.-Q. Preparation and characterization of kidney bean protein isolate (KPI)–chitosan (CH) composite films prepared by ultrasonic pretreatment. Food Hydrocoll. 2014, 36, 60–69. [Google Scholar] [CrossRef]
  98. Shahbazi, M.; Majzoobi, M.; Farahnaky, A. Physical modification of starch by high-pressure homogenization for improving functional properties of κ-carrageenan/starch blend film. Food Hydrocoll. 2018, 85, 204–214. [Google Scholar] [CrossRef]
  99. Molinaro, S.; Cruz-Romero, M.; Sensidoni, A.; Morris, M.; Lagazio, C.; Kerry, J.P. Combination of high-pressure treatment, mild heating and holding time effects as a means of improving the barrier properties of gelatin-based packaging films using response surface modeling. Innov. Food Sci. Emerg. Technol. 2015, 30, 15–23. [Google Scholar] [CrossRef]
  100. Benbettaïeb, N.; Chambin, O.; Karbowiak, T.; Debeaufort, F. Release behavior of quercetin from chitosan-fish gelatin edible films influenced by electron beam irradiation. Food Control 2016, 66, 315–319. [Google Scholar] [CrossRef]
  101. Sifuentes-Nieves, I.; Neira-Velázquez, G.; Hernández-Hernández, E.; Barriga-Castro, E.; Gallardo-Vega, C.; Velazquez, G.; Mendez-Montealvo, G. Influence of gelatinization process and HMDSO plasma treatment on the chemical changes and water vapor permeability of corn starch films. Int. J. Biol. Macromol. 2019, 135, 196–202. [Google Scholar] [CrossRef] [PubMed]
  102. Sifuentes-Nieves, I.; Hernández-Hernández, E.; Neira-Velázquez, G.; Morales-Sánchez, E.; Mendez-Montealvo, G.; Velazquez, G. Hexamethyldisiloxane cold plasma treatment and amylose content determine the structural, barrier and mechanical properties of starch-based films. Int. J. Biol. Macromol. 2019, 124, 651–658. [Google Scholar] [CrossRef]
  103. Marcuzzo, E.; Peressini, D.; Debeaufort, F.; Sensidoni, A. Effect of ultrasound treatment on properties of gluten-based film. Innov. Food Sci. Emerg. Technol. 2010, 11, 451–457. [Google Scholar] [CrossRef]
  104. Sorrentino, A.; Gorrasi, G.; Vittoria, V. Potential perspectives of bio-nanocomposites for food packaging applications. Trends Food Sci. Technol. 2007, 18, 84–95. [Google Scholar] [CrossRef]
  105. Yadav, S.; Mehrotra, G.K.; Dutta, P.K. Chitosan based ZnO nanoparticles loaded gallic-acid films for active food packaging. Food Chem. 2021, 334, 127605. [Google Scholar] [CrossRef] [PubMed]
  106. Duncan, T.V. Applications of nanotechnology in food packaging and food safety: Barrier materials, antimicrobials and sensors. J. Colloid Interface Sci. 2011, 363, 1–24. [Google Scholar] [CrossRef]
  107. Pinto, R.J.B.; Daina, S.; Sadocco, P.; Neto, C.P.; Trindade, T. Antibacterial activity of nanocomposites of copper and cellulose. BioMed Res. Int. 2013, 2013, 1–6. [Google Scholar] [CrossRef] [Green Version]
  108. Mihindukulasuriya, S.D.F.; Lim, L.T. Nanotechnology development in food packaging: A review. Trends Food Sci. Technol. 2014, 40, 149–167. [Google Scholar] [CrossRef]
  109. Ghanbarzadeh, B.; Oleyaei, S.A.; Almasi, H. Nanostructured materials utilized in biopolymer-based plastics for food packaging applications. Crit. Rev. Food Sci. Nutr. 2014, 55, 1699–1723. [Google Scholar] [CrossRef]
  110. Singh, T.; Shukla, S.; Kumar, P.; Wahla, V.; Bajpai, V.K.; Rather, I.A. Application of nanotechnology in food science: Perception and overview. Front. Microbiol. 2017, 8, 1501. [Google Scholar] [CrossRef] [Green Version]
  111. Aswathanarayan, J.B.; Vittal, R.R. Nanoemulsions and their potential applications in food industry. Front. Sustain. Food Syst. 2019, 3, 95. [Google Scholar] [CrossRef] [Green Version]
  112. Sothornvit, R. Nanostructured materials for food packaging systems: New functional properties. Curr. Opin. Food Sci. 2019, 25, 82–87. [Google Scholar] [CrossRef]
  113. Wilson, M.D.; Stanley, R.A.; Eyles, A.; Ross, T. Innovative processes and technologies for modified atmosphere packaging of fresh and fresh-cut fruits and vegetables. Crit. Rev. Food Sci. Nutr. 2019, 59, 411–422. [Google Scholar] [CrossRef] [PubMed]
  114. Mustafa, F.; Andreescu, S. Nanotechnology-based approaches for food sensing and packaging applications. RSC Adv. 2020, 10, 19309–19336. [Google Scholar] [CrossRef]
  115. Velásquez, E.; Patiño Vidal, C.; Rojas, A.; Guarda, A.; Galotto, M.J.; López de Dicastillo, C. Natural antimicrobials and antioxidants added to polylactic acid packaging films. Part I: Polymer processing techniques. Compr. Rev. Food Sci. Food Saf. 2021, 20, 3388–3403. [Google Scholar] [CrossRef]
  116. Othman, S.H.; Abd Salam, N.R.; Zainal, N.; Kadir Basha, R.; Talib, R.A. Antimicrobial activity of TiO2 nanoparticle-coated film for potential food packaging applications. Int. J. Photoenergy 2014, 2014, 1–6. [Google Scholar] [CrossRef] [Green Version]
  117. Rhim, J.-W.; Ng, P.K.W. Natural biopolymer-based nanocomposite films for packaging applications. Crit. Rev. Food Sci. Nutr. 2007, 47, 411–433. [Google Scholar] [CrossRef]
  118. Yusof, N.L.; Mutalib, N.-A.A.; Nazatul, U.K.; Nadrah, A.H.; Aziman, N.; Fouad, H.; Jawaid, M.; Ali, A.; Kian, L.K.; Sain, M. Efficacy of biopolymer/starch based antimicrobial packaging for chicken breast fillets. Foods 2021, 10, 2379. [Google Scholar] [CrossRef]
  119. Vlasveld, D.P.N.; Vaidya, S.G.; Bersee, H.E.N.; Picken, S.J. A comparison of the temperature dependence of the modulus, yield stress and ductility of nanocomposites based on high and low MW PA6 and PA66. Polymer 2005, 46, 3452–3461. [Google Scholar] [CrossRef]
  120. Halim, L.; Pascall, M.A.; Lee, J.; Finnigan, B. Effect of pasteurization, high-pressure processing, and retorting on the barrier properties of nylon 6, nylon 6/ethylene vinyl alcohol, and nylon 6/nanocomposites films. J. Food Sci. 2009, 74, 9–15. [Google Scholar] [CrossRef] [PubMed]
  121. Cui, H.; Yang, X.; Abdel-Samie, M.A.; Lin, L. Cold plasma treated phlorotannin/Momordica charantia polysaccharide nanofiber for active food packaging. Carbohydr. Polym. 2020, 239, 116214. [Google Scholar] [CrossRef] [PubMed]
  122. Lin, L.; Liao, X.; Cui, H. Cold plasma treated thyme essential oil/silk fibroin nanofibers against Salmonella Typhimurium in poultry meat. Food Packag. Shelf Life 2019, 21, 100337. [Google Scholar] [CrossRef]
  123. Galotto, M.J.; Ulloa, P.; Escobar, R.; Guarda, A.; Gavara, R.; Miltz, J. Effect of high-pressure food processing on the mass transfer properties of selected packaging materials. Packag. Technol. Sci. 2010, 23, 253–266. [Google Scholar] [CrossRef]
  124. Pascall, M.A. Packaging for high-pressure processing, irradiation, and pulsed electric field. In Packaging for Nonthermal Processing of Food; John Wiley & Sons, Ltd.: Chichester, UK, 2018; pp. 95–120. [Google Scholar]
  125. Fan, C.; Cui, R.; Lu, W.; Chen, H.; Yuan, M.; Qin, Y. Effect of high pressure treatment on properties and nano–Ag migration of PLA-based food packaging film. Polym. Test. 2019, 76, 73–81. [Google Scholar] [CrossRef]
  126. Chi, H.; Xue, J.; Zhang, C.; Chen, H.; Li, L.; Qin, Y. High pressure treatment for improving water vapour barrier properties of poly(lactic acid)/Ag nanocomposite Films. Polymers 2018, 10, 1011. [Google Scholar] [CrossRef] [Green Version]
  127. Ahmed, J. Use of graphene/graphene oxide in food packaging materials: Thermomechanical, structural and barrier properties. In Reference Module in Food Science; Elsevier: Amsterdam, The Netherlands, 2019; pp. 1–22. [Google Scholar]
  128. Lian, Z.; Zhang, Y.; Zhao, Y. Nano-TiO 2 particles and high hydrostatic pressure treatment for improving functionality of polyvinyl alcohol and chitosan composite films and nano-TiO 2 migration from film matrix in food simulants. Innov. Food Sci. Emerg. Technol. 2016, 33, 145–153. [Google Scholar] [CrossRef]
  129. Savadekar, N.R.; Karande, V.S.; Vigneshwaran, N.; Kadam, P.G.; Mhaske, S.T. Preparation of cotton linter nanowhiskers by high-pressure homogenization process and its application in thermoplastic starch. Appl. Nanosci. 2014, 5, 281–290. [Google Scholar] [CrossRef] [Green Version]
  130. Barra, G.; Guadagno, L.; Vertuccio, L.; Simonet, B.; Santos, B.; Zarrelli, M.; Arena, M.; Viscardi, M. Different methods of dispersing carbon nanotubes in epoxy resin and initial evaluation of the obtained nanocomposite as a matrix of carbon fiber reinforced laminate in terms of vibroacoustic performance and flammability. Materials 2019, 12, 2998. [Google Scholar] [CrossRef] [Green Version]
  131. Barra, A.; Santos, J.D.C.; Silva, M.R.F.; Nunes, C.; Ruiz-Hitzky, E.; Gonçalves, I.; Yildirim, S.; Ferreira, P.; Marques, P.A.A.P. Graphene derivatives in biopolymer-based composites for food packaging applications. Nanomaterials 2020, 10, 2077. [Google Scholar] [CrossRef]
  132. Jäger, H.; Knorr, D. Pulsed electric fields treatment in food technology: Challenges and opportunities. In Handbook of Electroporation; Springer: Berlin/Heidelberg, Germany, 2017; pp. 1–24. [Google Scholar]
  133. Novickij, V.; Stanevičienė, R.; Staigvila, G.; Gruškienė, R.; Sereikaitė, J.; Girkontaitė, I.; Novickij, J.; Servienė, E. Effects of pulsed electric fields and mild thermal treatment on antimicrobial efficacy of nisin-loaded pectin nanoparticles for food preservation. LWT 2020, 120, 108915. [Google Scholar] [CrossRef]
  134. Mergen, Ö.B.; Arda, E.; Evingür, G.A. Electrical, optical and mechanical properties of chitosan biocomposites. J. Compos. Mater. 2019, 54, 1497–1510. [Google Scholar] [CrossRef]
  135. Alakrach, A.M.; Zulkepli, N.N.; Al-Rashdi, A.A.; Ting, S.S.; Hamzah, R.; Dahham, O.S. Modification of polylactic acid/ halloysite bionanocomposites using electron beam radiation: Physical, barrier and thermal properties. Mater. Sci. Forum 2020, 1002, 57–65. [Google Scholar] [CrossRef]
  136. Moura, E.A.B. The potential of micro- and nano-sized fillers extracted from agroindustry residues as reinforcements of thermoplastic-based biocomposites—A Review. In Green Materials Engineering; The Minerals, Metals & Materials Series; Springer: Berlin/Heidelberg, Germany, 2019; pp. 89–100. [Google Scholar]
  137. Cardoso, R.V.C.; Carocho, M.; Fernandes, Â.; Barreira, J.C.M.; Cabo Verde, S.; Santos, P.M.P.; Antonio, A.L.; Gonzaléz-Paramás, A.M.; Barros, L.; Ferreira, I.C.F.R. Combined effects of irradiation and storage time on the nutritional and chemical parameters of dried Agaricus bisporus Portobello mushroom flour. J. Food Sci. 2021, 86, 2276–2287. [Google Scholar] [CrossRef]
  138. Wang, Z.; Zhang, N.; Wang, H.Y.; Sui, S.Y.; Sun, X.X.; Ma, Z.S. The effects of ultrasonic/microwave assisted treatment on the properties of soy protein isolate/titanium dioxide films. LWT-Food Sci. Technol. 2014, 57, 548–555. [Google Scholar] [CrossRef]
  139. da Silva, N.M.C.; Correia, P.R.C.; Druzian, J.I.; Fakhouri, F.M.; Fialho, R.L.L.; de Albuquerque, E.C.M.C. PBAT/THERMOPLASTIC STARCH Composite Films Reinforced with Starch Nanoparticles Produced by Ultrasound. Int. J. Polym. Sci. 2017, 2017, 1–10. [Google Scholar] [CrossRef] [Green Version]
  140. Targino de Souza Pedrosa, G.; Pimentel, T.C.; Gavahian, M.; Lucena de Medeiros, L.; Pagán, R.; Magnani, M. The combined effect of essential oils and emerging technologies on food safety and quality. LWT-Food Sci. Technol. 2021, 147, 111593. [Google Scholar] [CrossRef]
  141. Keenan, D.F.; Rößle, C.; Gormley, R.; Butler, F.; Brunton, N.P. Effect of high hydrostatic pressure and thermal processing on the nutritional quality and enzyme activity of fruit smoothies. LWT-Food Sci. Technol. 2012, 45, 50–57. [Google Scholar] [CrossRef]
  142. Bolumar, T.; Andersen, M.L.; Orlien, V. Antioxidant active packaging for chicken meat processed by high pressure treatment. Food Chem. 2011, 129, 1406–1412. [Google Scholar] [CrossRef]
  143. Martillanes, S.; Rocha-Pimienta, J.; Ramírez, R.; García-Parra, J.; Delgado-Adámez, J. Effect of an active packaging with rice bran extract and high-pressure processing on the preservation of sliced dry-cured ham from Iberian pigs. LWT-Food Sci. Technol. 2021, 151, 112128. [Google Scholar] [CrossRef]
  144. Martillanes, S.; Rocha-Pimienta, J.; Llera-Oyola, J.; Gil, M.V.; Ayuso-Yuste, M.C.; García-Parra, J.; Delgado-Adámez, J. Control of Listeria monocytogenes in sliced dry-cured Iberian ham by high pressure processing in combination with an eco-friendly packaging based on chitosan, nisin and phytochemicals from rice bran. Food Control 2021, 124, 107933. [Google Scholar] [CrossRef]
  145. Amaro-Blanco, G.; Delgado-Adámez, J.; Martín, M.J.; Ramírez, R. Active packaging using an olive leaf extract and high pressure processing for the preservation of sliced dry-cured shoulders from Iberian pigs. Innov. Food Sci. Emerg. Technol. 2018, 45, 1–9. [Google Scholar] [CrossRef]
  146. Pavli, F.; Argyri, A.A.; Skandamis, P.; Nychas, G.-J.; Tassou, C.; Chorianopoulos, N. Antimicrobial activity of oregano essential oil incorporated in sodium alginate edible films: Control of Listeria monocytogenes and spoilage in ham slices treated with high pressure processing. Materials 2019, 12, 3726. [Google Scholar] [CrossRef] [PubMed]
  147. Benbettaïeb, N.; Assifaoui, A.; Karbowiak, T.; Debeaufort, F.; Chambin, O. Controlled release of tyrosol and ferulic acid encapsulated in chitosan–gelatin films after electron beam irradiation. Radiat. Phys. Chem. 2016, 118, 81–86. [Google Scholar] [CrossRef]
  148. Shankar, S.; Danneels, F.; Lacroix, M. Coating with alginate containing a mixture of essential oils and citrus extract in combination with ozonation or gamma irradiation increased the shelf life of Merluccius sp. fillets. Food Packag. Shelf Life 2019, 22, 100434. [Google Scholar] [CrossRef]
  149. Fallah, A.A.; Sarmast, E.; Habibian Dehkordi, S.; Isvand, A.; Dini, H.; Jafari, T.; Soleimani, M.; Mousavi Khaneghah, A. Low-dose gamma irradiation and pectin biodegradable nanocomposite coating containing curcumin nanoparticles and ajowan (Carum copticum) essential oil nanoemulsion for storage of chilled lamb loins. Meat Sci. 2022, 184, 108700. [Google Scholar] [CrossRef]
  150. Shankar, S.; Khodaei, D.; Lacroix, M. Effect of chitosan/essential oils/silver nanoparticles composite films packaging and gamma irradiation on shelf life of strawberries. Food Hydrocoll. 2021, 117, 106750. [Google Scholar] [CrossRef]
  151. Dini, H.; Fallah, A.A.; Bonyadian, M.; Abbasvali, M.; Soleimani, M. Effect of edible composite film based on chitosan and cumin essential oil-loaded nanoemulsion combined with low-dose gamma irradiation on microbiological safety and quality of beef loins during refrigerated storage. Int. J. Biol. Macromol. 2020, 164, 1501–1509. [Google Scholar] [CrossRef]
  152. Bertuzzi, M.; Slavutsky, A. Standard and new processing techniques used in the preparation of films and coatings at the lab level and scale-up. In Edible Films and Coatings; CRC Press: Boca Raton, FL, USA, 2016; pp. 24–46. [Google Scholar]
  153. Almasi, H.; Jahanbakhsh Oskouie, M.; Saleh, A. A review on techniques utilized for design of controlled release food active packaging. Crit. Rev. Food Sci. Nutr. 2020, 61, 2601–2621. [Google Scholar] [CrossRef]
  154. Benbettaïeb, N.; Chambin, O.; Assifaoui, A.; Al-Assaf, S.; Karbowiak, T.; Debeaufort, F. Release of coumarin incorporated into chitosan-gelatin irradiated films. Food Hydrocoll. 2016, 56, 266–276. [Google Scholar] [CrossRef]
  155. Savolainen, K.; Pylkkänen, L.; Norppa, H.; Falck, G.; Lindberg, H.; Tuomi, T.; Vippola, M.; Alenius, H.; Hämeri, K.; Koivisto, J.; et al. Nanotechnologies, engineered nanomaterials and occupational health and safety – A review. Saf. Sci. 2010, 48, 957–963. [Google Scholar] [CrossRef]
  156. Marangoni Júnior, L.; Cristianini, M.; Padula, M.; Anjos, C.A.R. Effect of high-pressure processing on characteristics of flexible packaging for foods and beverages. Food Res. Int. 2019, 119, 920–930. [Google Scholar] [CrossRef] [PubMed]
  157. Lajarrige, A.; Gontard, N.; Gaucel, S.; Peyron, S. Evaluation of the food contact suitability of aged bio-nanocomposite materials dedicated to food packaging applications. Appl. Sci. 2020, 10, 877. [Google Scholar] [CrossRef]
  158. Lauriano Souza, V.G.; Rodrigues, P.F.; Duarte, M.P.; Fernando, A.L. Antioxidant migration studies in chitosan films incorporated with plant extracts. J. Renew. Mater. 2018, 6, 548–558. [Google Scholar] [CrossRef]
  159. Vasile, C.; Pamfil, D.; Zaharescu, T.; Dumitriu, R.-P.; Pricope, G.M.; Râpă, M.; Vasilievici, G. Effect of gamma irradiation on the PLA-based blends and biocomposites containing rosemary ethanolic extract and chitosan. Polymers 2022, 14, 1398. [Google Scholar] [CrossRef]
  160. Scarfato, P.; Di Maio, L.; Incarnato, L. Recent advances and migration issues in biodegradable polymers from renewable sources for food packaging. J. Appl. Polym. Sci. 2015, 132, 42597. [Google Scholar] [CrossRef]
  161. Magnuson, B.A.; Jonaitis, T.S.; Card, J.W. A brief review of the occurrence, use, and safety of food-related nanomaterials. J. Food Sci. 2011, 76, 126–133. [Google Scholar] [CrossRef]
  162. Kuorwel, K.K.; Cran, M.J.; Orbell, J.D.; Buddhadasa, S.; Bigger, S.W. Review of mechanical properties, migration, and potential applications in active food packaging systems containing nanoclays and nanosilver. Compr. Rev. Food Sci. Food Saf. 2015, 14, 411–430. [Google Scholar] [CrossRef] [Green Version]
  163. Riquet, A.M.; Breysse, C.; Dahbi, L.; Loriot, C.; Severin, I.; Chagnon, M.C. The consequences of physical post-treatments (microwave and electron-beam) on food/packaging interactions: A physicochemical and toxicological approach. Food Chem. 2016, 199, 59–69. [Google Scholar] [CrossRef] [Green Version]
  164. Jain, A.; Ranjan, S.; Dasgupta, N.; Ramalingam, C. Nanomaterials in food and agriculture: An overview on their safety concerns and regulatory issues. Crit. Rev. Food Sci. Nutr. 2017, 58, 297–317. [Google Scholar] [CrossRef]
  165. Toussaint, B.; Raffael, B.; Angers-Loustau, A.; Gilliland, D.; Kestens, V.; Petrillo, M.; Rio-Echevarria, I.M.; Van den Eede, G. Review of micro- and nanoplastic contamination in the food chain. Food Addit. Contam. Part A 2019, 36, 639–673. [Google Scholar] [CrossRef] [PubMed]
  166. Alfei, S.; Marengo, B.; Zuccari, G. Nanotechnology application in food packaging: A plethora of opportunities versus pending risks assessment and public concerns. Food Res. Int. 2020, 137, 109664. [Google Scholar] [CrossRef] [PubMed]
  167. Parliament, C.t.t.E. Communication from the Commission to the European Parliament, the Council and the European Economic and Social Committee-Regulatory Aspects of Nanomaterials [SEC(2008) 2036]; COMMISSION OF THE EUROPEAN COMMUNITIES: Brussels, Belgium, 2008. [Google Scholar]
  168. Ma, L.; Zhang, M.; Bhandari, B.; Gao, Z. Recent developments in novel shelf life extension technologies of fresh-cut fruits and vegetables. Trends Food Sci. Technol. 2017, 64, 23–38. [Google Scholar] [CrossRef]
  169. Huang, Y.; Mei, L.; Chen, X.; Wang, Q. Recent Developments in Food Packaging Based on Nanomaterials. Nanomaterials 2018, 8, 830. [Google Scholar] [CrossRef] [PubMed] [Green Version]
  170. Guillard, V.; Mauricio-Iglesias, M.; Gontard, N. Effect of novel food processing methods on packaging: Structure, composition, and migration properties. Crit. Rev. Food Sci. Nutr. 2010, 50, 969–988. [Google Scholar] [CrossRef]
  171. Paidari, S.; Tahergorabi, R.; Anari, E.S.; Nafchi, A.M.; Zamindar, N.; Goli, M. Migration of various nanoparticles into food samples: A review. Foods 2021, 10, 2114. [Google Scholar] [CrossRef] [PubMed]
  172. Souza, V.G.L.; Fernando, A.L. Nanoparticles in food packaging: Biodegradability and potential migration to food—A review. Food Packag. Shelf Life 2016, 8, 63–70. [Google Scholar] [CrossRef]
  173. Echegoyen, Y.; Rodríguez, S.; Nerín, C. Nanoclay migration from food packaging materials. Food Addit. Contam. Part A 2016, 33, 530–539. [Google Scholar] [CrossRef]
  174. Kumar, P.; Han, J.H. Packaging materials for non-thermal processing of food and beverages. In Emerging Food Packaging Technologies; Elsevier: Amsterdam, The Netherlands, 2012; pp. 323–334. [Google Scholar]
  175. Ashfaq, M.; Hashmi, M.Z.; Mumtaz, A.; Javed, D.; Ain, N.U.; Shifaqat, S.; Rehman, M.S.U. Environmental risk assessment of antibiotics and AMR/ARGs. In Antibiotics and Antimicrobial Resistance Genes in the Environment; Elsevier: Amsterdam, The Netherlands, 2020; pp. 331–349. [Google Scholar]
  176. Rapisarda, M.; Patanè, C.; Pellegrino, A.; Malvuccio, A.; Rizzo, V.; Muratore, G.; Rizzarelli, P. Compostable polylactide and cellulose based packaging for fresh-cut cherry tomatoes: Performance evaluation and influence of sterilization treatment. Materials 2020, 13, 3432. [Google Scholar] [CrossRef]
  177. Mauricio-Iglesias, M.; Jansana, S.; Peyron, S.; Gontard, N.; Guillard, V. Effect of high-pressure/temperature (HP/T) treatments of in-package food on additive migration from conventional and bio-sourced materials. Food Addit. Contam. Part A 2010, 27, 118–127. [Google Scholar] [CrossRef] [Green Version]
  178. Zhu, B.; Fan, C.; Cheng, C.; Lan, T.; Li, L.; Qin, Y. Migration kinetic of silver from polylactic acid nanocomposite film into acidic food simulant after different high-pressure food processing. J. Food Sci. 2021, 86, 2481–2490. [Google Scholar] [CrossRef] [PubMed]
Figure 1. Principle impact of non-thermal food processing on various biobased polymers.
Figure 1. Principle impact of non-thermal food processing on various biobased polymers.
Polymers 14 05069 g001
Figure 2. Number of scientific articles found in Science direct in the period from 2017 to 2022. EC—edible coating, IRR—irradiation, US—ultrasound, PL—pulsed light, Nano—nanomaterials, PEF—pulsed electric field, HPP—high pressure processing.
Figure 2. Number of scientific articles found in Science direct in the period from 2017 to 2022. EC—edible coating, IRR—irradiation, US—ultrasound, PL—pulsed light, Nano—nanomaterials, PEF—pulsed electric field, HPP—high pressure processing.
Polymers 14 05069 g002
Table 1. Effect of non-thermal treatments on characteristics of edible packaging materials.
Table 1. Effect of non-thermal treatments on characteristics of edible packaging materials.
Packaging MaterialTreatmentEffect of Process on Packaging MterialReference
κ-carrageenan/starch blend filmHPP 14 MPa (2–5 passes) and 20 MPa (2 passes)Increased water resistance and WVP; increased surface hydrophobicity and tensile strength[98]
Gelatin-based filmsHPP (600 MPa), 30 min at 20.5 °CDecrease in OTR; significant increase in TS and Tm; Significant decrease in WVTR[99]
Calcium caseinate- whey protein isolate-glycerol filmγ-Irradiation of 32 kGyIncreased puncture strength; no detrimental effect on WVP[83]
Chitosan-gelatin films +5 wt % quercetinElectron beam irradiation of 60 kGyDecreased the release rate of quercetin;
42% increase in TS; 65% decrease in O2P; improvement of thermal stability
[100]
Chitosan (1.5%) coating on fresh jujube fruitUV-irradiation 253.7 nm; 4 and 6 minReduced decay of jujube fruit[82]
Starch-based filmHMDSO cold plasma,
70 w, 30 min
Increased film crystallinity; improved WVP and mechanical properties of films[101,102]
Chitosan-based + zein coatingsCold plasma 100 W (65 V, 1.5 A), d = 5 mm, 30 sImproved surface wettability; slower drug release rate within 24 h from 72.8% to 49.3%[38]
Gluten-based filmUltrasound 600 W/cm2, 24 Hz, 3–12 minEnhanced protein dispersion and the appearance of film[103]
κ-carrageenan/starch blend filmHPP 14 MPa (2–5 passes) and 20 MPa (2 passes)Increased water resistance and WVP; Increased surface hydrophobicity and tensile strength[98]
Gelatin-based filmsHPP (600 MPa), 30 min at 20.5 °CDecrease in OTR; Significant increase in TS and Tm; Significant decrease in WVTR[99]
Calcium caseinate- whey protein isolate-glycerol filmγ-Irradiation of 32 kGyIncreased puncture strength; no detrimental effect on WVP[83]
Chitosan-gelatin films +5 wt % quercetinElectron beam irradiation of 60 kGyDecreased the release rate of quercetin;42% increase in TS; 65% decrease in O2P; improvement of thermal stability[100]
HMDSO—Hexamethyldisiloxane; HPP—high pressure processing; OTR—oxygen transmission rate; O2P—oxygen permeability; WVP—water vapour permeability; WVTR—Water vapor transmission rate; TS—tensile strength; EAB—elongation at break; Tm—melting temperature.
Table 2. Effect of non-thermal treatments on nano-packaging material characteristics.
Table 2. Effect of non-thermal treatments on nano-packaging material characteristics.
Packaging MaterialTreatmentEffect of Process on Packaging MaterialReference
PA/LDPE
PA/nano/LDPE
PA/EVOH/LDPE
Pasteurization
75 °C, 30 min
OTR > 13.3%; WVTR > 96.7%
OTR > 75.9%; WVTR > 40.7%
OTR < 44.5%; WVTR > 43.8%
[120]
PA/LDPE
PA/nano/LDPE
PA/EVOH/LDPE
HPP 70 °C, 800 MPa,
10 min
OTR > 16.9%; WVTR > 21%
OTR > 39.7 %; WVTR > 21.2%
OTR < 53.9%; WVTR > 48.9%
PA/PP
PA/nano/PP
121 °C, 30 minOTR > 63.3%
OTR > 112.6%
High and low molecular weight (MW) PA6 and PA66 silica nanocomposites; Commercial nanocompositesTemperatures
from 20 to 120 °C
Yield stress increases with the addition of layered silicate; Low MW PA6 and PA66 nanocomposites show very brittle fracture behaviour at room temperature; High MW PA6 nanocomposites are ductile; Commercial nanocomposites are brittle; With temperature increase all the nanocomposites become ductile at a certain temperature[119]
Bioactive coating: 3% N-palmitoyl chitosan + mandarin EOs nanoemulsionHPP 200–400 MPa, 25 °C, 5 min;
pulsed light 3 × 104
1.2 × 105 J/m2
HPP caused disintegration of the coating layer;
pulsed light treatment did not affect samples firmness during storage, nor coating integrity
[94]
Thyme EOs/silk fibroin nanofibersCold plasma 400W, 4 min;
N2 flow rate = 100 cm3/min
With silk fibroin increased, from 50% to 100%, moisture content increased from 11.87% to 15.77%; water solubility increased from 52.54% to 63.54%; WVP decreased from 1.58 to 0.77 g mm/m2 h kPa; TS decreased from 12.9 to 6.53 MPa; EAB increased from 17.06 to 21.39[122]
Phlorotannin (PT) encapsulated in Momordica charantia polysaccharide (MCP) nanofiberscold plasma 30 s, 350 W,
N2 flow rate = 100 cm3/min
Release efficiency of PT from the nanofibers was enhanced by 23.5% (4 °C) and 25% (25 °C); Antibacterial and anti-oxidant activities of PT/MCP nanofibers were markedly improved; moisture content and water solubility of the MCP nanofibers increased (from 4.28% and 10.42% to 8.91% and 18.94%, respectively); maximum TS was achieved when MCP:PT was 6:1; free radical scavenging capacity of PT/MCP increased to 91.74%[121]
OTR—oxygen transmission rate; WVTR—water vapor transmission rate; TS—tensile strength; EAB-elongation at break; HPP—high pressure processing; PA—polyamide, EVOH—Ethylene vinyl alcohol; MW—molecular weight; EOs—essential oils; PT—Phlorotannin; MCP—Momordica charantia polysaccharide; >increased property; <decreased property.
Table 3. Effect of non-thermal treatments on active packaging material characteristics.
Table 3. Effect of non-thermal treatments on active packaging material characteristics.
NTTConditionsActive SubstanceActive Character Food EffectReference
HPP
800 MPa, 10 min. at 5 °CRosemary extract 0.45 mg/cm2 on LDPEAOChicken pattiesHPP reduced the microbial growth and the rosemary suppressed the lipid oxidation[142]
600 MPa, 7 min, water at 10 °CRice bran extract on internal surface of vacuum package filmAM, AODry-cured Iberian hamHPP+AP does not improve activity of AP film[143]
600 MPa, 8 minChitosan, nisin and phytochemicals from rice branAMSliced dry-cured Iberian hamHPP+nisin or oryzanol chitosan based-films reduced the population of L. monocytogenes by 6 log CFU/g[144]
600 MPa, 7 minOlive leaf extract on internal surface of vacuum package filmAO, AMSliced dry-cured shouldersAP not efficient to preserve the volatile compounds profile of the samples from the changes induced by HPP[145]
500 MPa, 2 min at 20 °COregano EOs +Na-alginate edible filmAMSliced hamReduction of Listeria counts below the detection limit[146]
EBI60 kGyFerulic acid and tyrosol incorporated into chitosan–gelatin edible filmsAOFood simulant (water) at
25 °C
Effective diffusivity of tyrosol was 40 times greater than that of ferulic acid.
[147]
40 and 60 kGyQuercetin incorporated into chitosan-gelatin edible filmAOEthanol 30% (v/v) at 25 °CIrradiation induced a reduction of the quercetin release rate. Effective diffusion coefficient of quercetin was not significantly modified by the irradiation.[100]
OZ or γ irrOZ = 10 ppm, 15 min;
γ irr = 1 kGy
Alginate/EOs + citrus extractAMMerluccius sp. filletIncreased shelf-life of fish fillets from 7 days (control) to 28 days for alginate/EOs/γ irr samples; and 21 days for alginate/EOs/OZ treatment[148]
γ irrLow dose γ irrEOs: Thyme +
Cannelle +
Oregano
AMBoneless chicken thigh samplesShelf-life of the chicken sample increased by 3 days and 8 days when treated with Thyme + Cannelle + Oregano EOs and gamma irradiation, respectively. γ irr + EOs increased shelf-life by 14 days[87]
2 kGyPectin + curcumin NPs + ajowan EOs nanoemulsionAMChilled lamb loinsIncreased shelf-life of lamb loins from 5 days (control) to 25 days[149]
1 kGyChitosan (film + EOs;
Chitosan + Silver NPs (AgNPs);
Chitosan + Eos + AgNPs
AMStrawberryStrong AM activity against Escherichia coli, Listeria monocytogenes, Salmonella Typhimurium, and Aspergillus niger. All composite films exhibited lower weight loss than control samples, and γ-irr reduce the firmness and decay during 12 days of storage[150]
2.5 kGyChitosan + Cumin EO nanoemulsionAMBeef loinsEffective to control microbial population; Enhanced storage life (~ 14 days) of beef loins and slowed some physico-chemical changes[151]
AP—active packaging; LDPE—low density polyethylene; EOs—essential oils; AO—antioxidant; AM—antimicrobial; γ irr—gamma irradiation; OZ—Ozonation; HPP—high pressure processing; EBI—electron beam irradiation.
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Gabrić, D.; Kurek, M.; Ščetar, M.; Brnčić, M.; Galić, K. Effect of Non-Thermal Food Processing Techniques on Selected Packaging Materials. Polymers 2022, 14, 5069. https://doi.org/10.3390/polym14235069

AMA Style

Gabrić D, Kurek M, Ščetar M, Brnčić M, Galić K. Effect of Non-Thermal Food Processing Techniques on Selected Packaging Materials. Polymers. 2022; 14(23):5069. https://doi.org/10.3390/polym14235069

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Gabrić, Domagoj, Mia Kurek, Mario Ščetar, Mladen Brnčić, and Kata Galić. 2022. "Effect of Non-Thermal Food Processing Techniques on Selected Packaging Materials" Polymers 14, no. 23: 5069. https://doi.org/10.3390/polym14235069

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