New Advances in Edible Coatings and Their Application in Food Preservation and Shelf Life

A special issue of Foods (ISSN 2304-8158). This special issue belongs to the section "Food Packaging and Preservation".

Deadline for manuscript submissions: closed (31 March 2026) | Viewed by 5503

Special Issue Editors


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Department of Food and Nutrition, National Institute of Health Doctor Ricardo Jorge, Av. Padre Cruz, 1649-016 Lisbon, Portugal
Interests: food packaging; materials engineering; innovative food packaging; nanomaterials; food contaminants; extracts from food by-products
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Special Issue Information

Dear Colleagues,

This special edition aims to consolidate innovative investigations focused on developing and applying edible coatings for food preservation. Edible coatings have presented remarkable potential in regard to prolonging the shelf life of food products, diminishing quality degradation, and mitigating food waste.

Our objective is to underscore novel formulations and application methodologies, encompassing the utilization of biopolymers, bioactive compounds, and nanotechnology. Additionally, contributions examining the mechanisms of action, influence on sensory and nutritional quality, and food safety are encouraged.

We invite researchers to submit empirical studies, critical reviews, and sustainable methodologies that foster the integration of these coatings within the food industry. This edition aspires to contribute significantly towards advancing effective and environmentally sustainable solutions.

This Special Issue invites papers in the following areas:

  • Optimization of the formulation of Edible Coatings (they can be based on Polysaccharides, proteins, or lipids);
  • Enhanced mechanical and barrier properties of edible coatings (e.g., due to the use of nanomaterials);
  • Incorporation of bioactive compounds (e.g., antioxidants, antimicrobials, probiotics, prebiotics) in edible coating;
  • Extension of food shelf life due to the application of edible coatings;
  • Advances in the release of active agents from coatings: encapsulation of bioactive compounds and release of compounds in response to environmental conditions;
  • Regulatory aspects of coatings and consumer acceptance.

Dr. Fernanda Vilarinho
Dr. Ana Teresa Sanches-Silva
Guest Editors

Manuscript Submission Information

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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. Foods 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 2900 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

  • food packaging
  • edible coatings
  • biopolymers
  • nanomaterials
  • bioactive compounds
  • antioxidants
  • antimicrobials
  • active packaging
  • shelf-life extension
  • encapsulation

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Published Papers (3 papers)

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Research

12 pages, 1103 KB  
Article
Citric Pectin–Cordia verbenacea Bioactive Coatings to Preserve Egg Quality Under Non-Refrigerated Conditions Using Machine Learning Approaches
by Junior Gonçalves Soares, Suélen Serafini, Fernanda Picoli, Denise Nunes Araújo, Marcel Manente Boiago, Alessandro Cazonatto Galvão and Weber da Silva Robazza
Foods 2026, 15(5), 879; https://doi.org/10.3390/foods15050879 - 4 Mar 2026
Viewed by 452
Abstract
In many developing regions, the lack of a continuous cold chain poses a significant challenge for the preservation of table eggs. This study developed bioactive coatings based on citric pectin enriched with Cordia verbenacea DC aqueous extract to maintain egg quality under non-refrigerated [...] Read more.
In many developing regions, the lack of a continuous cold chain poses a significant challenge for the preservation of table eggs. This study developed bioactive coatings based on citric pectin enriched with Cordia verbenacea DC aqueous extract to maintain egg quality under non-refrigerated conditions (25 days). A total of 144 fresh eggs were divided into a Control group and five treatment groups with increasing extract concentrations (0% to 100%). Quality was assessed through physical, chemical, and microbiological parameters, supported by principal component analysis (PCA) and random forest (RF) modeling. The results showed that all coated eggs maintained significantly higher Haugh units (classified as Grade B) compared to the control (grade C) (p < 0.05). The microbial load on the shell, a fundamental indicator of sanitary-hygienic conditions, was reduced from 70.0 ± 5.8 CFU/egg in the control to zero in the 100% extract treatment. The RF model achieved 97.06% accuracy in classifying the treatments, identifying microbial load and Haugh unit as the primary predictors of quality. This bioactive coating represents a sustainable and low-cost technology to enhance the shelf life and safety of eggs in markets without refrigeration infrastructure. Full article
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25 pages, 6022 KB  
Article
Effects of Spice Mixtures and Konjac Glucomannan–Whey Protein Isolate Based Edible Films on the Microbiological Stability and Textural Properties of Cheese
by Aslı Çelikel Güngör, Mutlu Buket Akın and Emir Ayşe Özer
Foods 2025, 14(22), 3819; https://doi.org/10.3390/foods14223819 - 7 Nov 2025
Viewed by 1380
Abstract
Some of the main factors affecting the product quality and shelf life of cheese include weight loss during storage, microbial spoilage, and structural changes in processing technology. Edible films are coating materials produced with the aim of improving quality properties and extending shelf [...] Read more.
Some of the main factors affecting the product quality and shelf life of cheese include weight loss during storage, microbial spoilage, and structural changes in processing technology. Edible films are coating materials produced with the aim of improving quality properties and extending shelf life, and various studies have been conducted on their properties. However, research examining the effects of coatings enriched with spice-derived natural antimicrobial compounds is scarce in relation to cheese quality. In this study, edible films and spice mixtures were applied to cheese during storage, and their effects on weight loss, textural properties, and microbiological stability were investigated. Response surface methodology was used to determine the edible films and spice mixtures used in the coatings. The amounts of whey protein isolate and konjac glucomannan in the composition of edible films were found to affect water vapor permeability, elongation coefficient, and tensile strength properties; in the spice mixtures, thyme, rosemary, and red pepper were found to have antifungal effects. Based on the data obtained, it was determined that applying an edible film coating to the cheese surface reduced weight loss and improved textural properties, while applying a spice mixture coating increased microbial stability. This study demonstrates that the use of edible films supported by natural protective components could be a practically applicable, innovative, and sustainable approach to improving the properties of cheese and extending its shelf life. Full article
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17 pages, 1991 KB  
Article
pH-Sensitive Cassava Starch/Onion Peel Powder Films as Colorimetric Indicators for Minced Beef Freshness Monitoring
by Assala Torche, Toufik Chouana, Ibtissem Sanah, Fairouz Djeghim, Esma Anissa Trad Khodja, Katiba Mezreb, Redouan Elboutachfaiti, Cedric Delattre, Maria D’Elia and Luca Rastrelli
Foods 2025, 14(17), 2974; https://doi.org/10.3390/foods14172974 - 26 Aug 2025
Cited by 1 | Viewed by 2863
Abstract
pH-sensitive intelligent films offer a novel strategy for real-time monitoring of food freshness via visible color changes. This study valorizes onion peel powder (OPP), a polyphenol-rich agro-industrial by-product, by incorporating it into cassava starch-based films at three concentrations (1O, 2O, 3O). Increasing OPP [...] Read more.
pH-sensitive intelligent films offer a novel strategy for real-time monitoring of food freshness via visible color changes. This study valorizes onion peel powder (OPP), a polyphenol-rich agro-industrial by-product, by incorporating it into cassava starch-based films at three concentrations (1O, 2O, 3O). Increasing OPP content led to significantly higher total phenolic and flavonoid levels, enhancing the films’ antioxidant properties (p < 0.0001). While the films exhibited selective antibacterial effects, pronounced inhibition zones were observed against Pseudomonas aeruginosa and Escherichia coli, two relevant meat spoilage and pathogenic bacteria. The films displayed clear and gradual color shifts from light to dark brown across a wide pH range (1–13), confirming their suitability as pH indicators. When applied as labels in minced beef packaging stored at 4 °C, the films successfully tracked freshness over 13 days. Film color changes were strongly correlated with microbial load and pH variations, accurately flagging spoilage onset. These findings support the potential of cassava starch/OPP films as biodegradable, cost-effective intelligent packaging tools, contributing to food safety, waste reduction, and circular bioeconomy principles. The system provides a practical, non-invasive solution for meat freshness monitoring without requiring instrumentation. Full article
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