Chitosan and Other Edible Coatings with Antimicrobial Activity: Synthesis, Properties and Horticultural Applications II

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Coatings for Food Technology and System".

Deadline for manuscript submissions: 20 May 2024 | Viewed by 5421

Special Issue Editors


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Guest Editor
Postharvest Research Center, Valencian Institute of Agrarian Research (IVIA), 46113 Valencia, Spain
Interests: edible coatings for horticultural products; gas and mechanical properties of biodegradable films; fresh-cut fruits and vegetables; postharvest physiology; postharvest technology; fruit quality
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Postharvest Research Center, Valencian Institute of Agrarian Research (IVIA), 46113 Valencia, Spain
Interests: postharvest pathology of horticultural produce; alternatives to conventional fungicides; integrated disease management; food additives; biological control; fungal infection; postharvest technology; fruit quality
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Antimicrobial edible coatings for entire or fresh-cut fruits and vegetables based on natural biopolymers (i.e., proteins and polysaccharides) that serve as carriers of antimicrobial agents or even are inherently antimicrobial, such as chitosan, are increasingly gaining interest for researchers and industry due to their high potential to provide important produce quality and safety benefits. Additionally, edible coatings can also exert a barrier function to water vapor, gases and other solutes, regulating physiological aspects and eliciting resistance to pathogens in fruit. Altogether, these effects impact positively on the quality, storability, and safety of fruit.

Despite the substantial research progress in antimicrobial edible coatings for fresh and minimally processed fruits and vegetables, the development of tailor-made solutions according to specific commercialization needs still represents a technological challenge because of important physical, physiological, and biochemical differences among the wide variety of fresh horticultural commodities. The development of edible films and coatings with antimicrobial activity requires knowledge about the chemical bases to develop formulations capable of forming edible coatings, the structural characteristics and functionalities that enable their use to coat the horticultural product, the effects of the coatings on different postharvest pathogens in in vitro studies and in different fruit matrices, as well as their effect on the quality during postharvest storage.

This Special Issue aims to cover original research and critical review articles on recent aspects of novel antimicrobial edible coatings formulated with chitosan and other edible coating-forming materials containing salts, natural compounds or antagonistic microorganisms to preserve fresh and minimally processed fruits and vegetables, as well as on the mode of action against postharvest pathogens and their properties to preserve the physicochemical and sensory characteristics of the coated product.

In particular, topics of interest include, but are not limited to:

  • Biopolymer interactions with active ingredients used in the design of antimicrobial edible coatings for horticultural products;
  • Improving biopolymers performance of antimicrobial edible coatings for fruit and vegetable applications;
  • Influence of antimicrobial agents on optical, mechanical, and barrier properties of stand-alone edible films;
  • Mode of action of antimicrobial edible coatings on different postharvest pathogens;
  • Effect of active coating materials to control decay and spoilage due to fungi, bacteria or other contaminating microorganisms of horticultural products during postharvest storage;
  • Physiological and metabolic responses of antimicrobial edible coatings in fresh and minimally processed fruits and vegetables during postharvest storage;
  • Nutritional and sensory quality of coated horticultural products during postharvest storage.

Dr. María B. Pérez-Gago
Prof. Dr. Lluís Palou
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. Coatings is an international peer-reviewed open access monthly 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 2600 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

  • edible coatings
  • horticultural produce
  • physiological responses
  • microbial decay control
  • postharvest quality and safety

Published Papers (2 papers)

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Research

20 pages, 7295 KiB  
Article
A Comparison of Cellulose Nanocrystals and Nanofibers as Reinforcements to Amylose-Based Composite Bioplastics
by Marwa Faisal, Marija Žmirić, Ngoc Quynh Nhu Kim, Sander Bruun, Loredana Mariniello, Michela Famiglietti, Heloisa N. Bordallo, Jacob Judas Kain Kirkensgaard, Bodil Jørgensen, Peter Ulvskov, Kim Henrik Hebelstrup and Andreas Blennow
Coatings 2023, 13(9), 1573; https://doi.org/10.3390/coatings13091573 - 09 Sep 2023
Viewed by 1523
Abstract
Starch-based bioplastics offer a promising alternative to conventional plastics. However, they exhibit certain limitations, notably in terms of mechanical strength and barrier properties. These challenges could potentially be addressed through the incorporation of nanocellulose as a reinforcing agent. In this study, we fabricated [...] Read more.
Starch-based bioplastics offer a promising alternative to conventional plastics. However, they exhibit certain limitations, notably in terms of mechanical strength and barrier properties. These challenges could potentially be addressed through the incorporation of nanocellulose as a reinforcing agent. In this study, we fabricated bioplastic films using a casting and blending approach, employing highly linear pure amylose (AM) in combination with cellulose nanofibers (CNF) or cellulose nanocrystals (CNC) at various ratios. This allowed for a direct comparison of CNF and CNC functionality within the AM matrix. We systematically assessed mechanical properties and water barrier characteristics, encompassing parameters such as water permeability, moisture content, swelling, solubility, crystallinity, thermal stability, transmittance, and opacity. Additionally, we investigated water vapor and oxygen permeability. Furthermore, we delved into distinctions between CNC and CNF biocomposites. Incorporation of either type of nanocellulose yielded enhancements in film properties, with CNF exerting a more pronounced positive influence compared to CNC. Particularly noteworthy were the mechanical properties, wherein CNF composite films demonstrated markedly higher tensile strength and Young’s modulus compared to their CNC counterparts. For instance, the inclusion of 1% CNF led to a substantial increase in AM tensile strength from 66.1 MPa to 144.8 MPa. Conversely, water vapor permeability exhibited a converse behavior, as the addition of 1% CNF resulted in a significant reduction of water barrier properties from 8.7 to 1.32 g mm m−2 24 h−1kPa−1. Intriguingly, CNC films displayed greater elongation at the point of rupture in comparison to CNF films. This can be attributed to the larger surface area of the CNC and the favorable interfacial interaction between AM and CNC. Notably, the introduction of nanocellulose led to reduced film opacity and improved thermal stability. In summary, nanocellulose interacted synergistically with the AM matrix, establishing a robust hydrogen-bonded network that greatly enhanced the performance of the biocomposite films. Full article
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20 pages, 797 KiB  
Article
Antifungal Hydroxypropyl Methylcellulose (HPMC)-Lipid Composite Edible Coatings and Modified Atmosphere Packaging (MAP) to Reduce Postharvest Decay and Improve Storability of ‘Mollar De Elche’ Pomegranates
by Bruno Di Millo, Victoria Martínez-Blay, María B. Pérez-Gago, Maricruz Argente-Sanchis, Amparo Grimal, Elena Baraldi and Lluís Palou
Coatings 2021, 11(3), 308; https://doi.org/10.3390/coatings11030308 - 09 Mar 2021
Cited by 11 | Viewed by 3733
Abstract
Pomegranate exhibits important postharvest quality losses that limit its storage potential, caused mainly by weight loss, chilling injury and fungal diseases. In this work, we evaluated the effect of novel hydroxypropyl methylcellulose (HPMC) edible coatings (ECs) formulated with three different lipids (beeswax (BW), [...] Read more.
Pomegranate exhibits important postharvest quality losses that limit its storage potential, caused mainly by weight loss, chilling injury and fungal diseases. In this work, we evaluated the effect of novel hydroxypropyl methylcellulose (HPMC) edible coatings (ECs) formulated with three different lipids (beeswax (BW), carnauba wax, and glycerol monostearate), as hydrophobic components, and two different GRAS salts (potassium bicarbonate (PBC) and sodium benzoate (SB)), as antifungal ingredients, to control weight loss and natural fungal decay of ‘Mollar de Elche’ pomegranates during storage at 20 °C. Afterwards, selected antifungal ECs and commercial modified atmosphere packaging (MAP) films were assayed alone or in combination to control natural decay and preserve fruit quality of pomegranates stored at 5 °C for 4 months plus 1 week at 20 °C. Results showed that ECs amended with SB reduced pomegranate latent infections caused by Botrytis cinerea and wound diseases caused by Penicillium spp. Moreover, MAP technologies were confirmed as an efficient mean to preserve freshness, prevent fruit shriveling and rind browning, and reduce fungal decay, thus extending storage life of pomegranates. The combination HPMC-BW-SB + MAP was the most promising treatment as it reduced weight loss and decay, without negatively affecting the fruit physicochemical and sensory quality. Full article
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