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Polymers
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Biopolymer-Based Films and Coatings for Packaging Applications II
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Biopolymer-Based Films and Coatings for Packaging Applications II

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Circular and Green Sustainable Polymer Science".

Deadline for manuscript submissions: closed (31 March 2025) | Viewed by 3910

Special Issue Editor

Prof. Dr. Albert Linton Charles

E-Mail Website
Guest Editor
Department of Tropical Agriculture and International Cooperation, National Pingtung University of Science and Technology, Pingtung 912, Taiwan
Interests: food science; food biochemistry; functional food; starch polymer; bioplastic; edible films
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Bioplastics are currently generating high research interest, motivated by the environmental threat posed by petroleum-based plastics. The food packaging industry stands to gain as consumers demand eco-friendly and intelligent packaging materials. Therefore, finding alternative plastics that are environmentally friendly and low cost to sustainably support the developing bio-economy is one strategy that can meet food loss and waste sustainable development goals. Bioplastics developed from agriculture waste can be designed to intelligently monitor food quality during storage, and we can explore their biocompatibility in coating bioactives. Moreover, composite polymers obtained from food waste would not only lead to a reduction in food loss and waste, but will create biodegradable material with enhanced physicomechanical, barrier, and thermomechanical properties, which will develop cost-effective materials for use in a range of bioproducts.

Therefore, this Special Issue will encompass current and applied research in the discipline of biodegradable polymers, especially from agricultural waste. Submissions are welcome on topics related to the bioconversion of food wastes into polymers, bio-based microencapsulation, the customized production of composite polymers, and smart bioplastics and their applications in the areas of food quality monitoring during short- and long-term storage use, and cost-effective production strategies for the best possible industrial output/relevance.

Prof. Dr. Albert Linton Charles
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • active packaging
  • biodegradable polymer
  • bioplastic
  • edible films
  • food wastes
  • microencapsulation
  • wall materials
  • freeze and spray drying
  • oxidative shelf life
  • active ingredients
  • antibacterial film

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Published Papers (2 papers)

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Research

17 pages, 1680 KiB  
Article
Encapsulation of Thymol in Ethyl Cellulose-Based Microspheres and Evaluation of Its Sustained Release for Food Applications
by Iro Giotopoulou, Haralambos Stamatis and Nektaria-Marianthi Barkoula
Polymers 2024, 16(23), 3396; https://doi.org/10.3390/polym16233396 - 2 Dec 2024
Cited by 5 | Viewed by 1680
Abstract
Food waste is a global concern with enormous economic, environmental and social impacts that has contributed to active packaging evolution. However, incorporating bioactive substances into the packaging can deteriorate its physicochemical and mechanical characteristics. Thus, the objective of this work was to entrap [...] Read more.
Food waste is a global concern with enormous economic, environmental and social impacts that has contributed to active packaging evolution. However, incorporating bioactive substances into the packaging can deteriorate its physicochemical and mechanical characteristics. Thus, the objective of this work was to entrap the natural bioactive compound thymol into microparticles and apply them in the form of pads for the controlled release of bioactivity in food packaging material. The physicochemical characteristics and bioactivity of five different ethyl cellulose-based microparticles were evaluated. Increasing the amount of thymol in the formulation led to higher encapsulation efficiency. Encapsulation resulted in a substantial increase of >10–20 °C in the volatilization temperature of thymol, and the release of thymol occurred following a sustained profile, best described by the Higuchi release kinetic model. Increasing the polymer to thymol ratio in the microparticles resulted in higher thermal stability and a more gradual release profile. While all formulations demonstrated considerable inhibition of E. coli growth, the ones with the highest thymol content maintained their antimicrobial activity for at least one month of microparticle storage. Furthermore, the ability of the microparticles in retaining pH and titratable acidity of cherry tomatoes was evaluated, and it was confirmed that these characteristics were maintained during 21 days of storage. Full article
(This article belongs to the Special Issue Biopolymer-Based Films and Coatings for Packaging Applications II)
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18 pages, 23979 KiB  
Article
Poly(butylene adipate-co-terephthalate)/Polylactic Acid/Tetrapod-Zinc Oxide Whisker Composite Films with Antibacterial Properties
by Zhibo Zhao, Rajkamal Balu, Sheeana Gangadoo, Naba Kumar Duta and Namita Roy Choudhury
Polymers 2024, 16(8), 1039; https://doi.org/10.3390/polym16081039 - 10 Apr 2024
Cited by 3 | Viewed by 1584
Abstract
Biodegradable composite films comprising of poly(butylene adipate-co-terephthalate) (PBAT), polylactic acid (PLA), and tetrapod-zinc oxide (T-ZnO) whisker were prepared by a melt-extrusion and blow molding process. The effect of the incorporation of the T-ZnO whisker (1 to 7 wt.%) in the PBAT/PLA blend film [...] Read more.
Biodegradable composite films comprising of poly(butylene adipate-co-terephthalate) (PBAT), polylactic acid (PLA), and tetrapod-zinc oxide (T-ZnO) whisker were prepared by a melt-extrusion and blow molding process. The effect of the incorporation of the T-ZnO whisker (1 to 7 wt.%) in the PBAT/PLA blend film was studied systematically. The composite films with an optimal T-ZnO whisker concentration of 3 wt.% exhibited the highest mechanical (tensile strength ~32 MPa), rheological (complex viscosity~1200 Pa.s at 1 rad/s angular frequency), and gas barrier (oxygen permeability~20 cc/m2·day) properties, whereas the composite films with 7 wt.% T-ZnO whiskers exhibited the highest antibacterial properties. The developed composite films can find potential application as antibacterial food packaging materials. Full article
(This article belongs to the Special Issue Biopolymer-Based Films and Coatings for Packaging Applications II)
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