Polysaccharide-protein films loaded with silver and zinc oxide nanoparticles for food packaging. A review

Abstract

In recent years, nanoparticles have attracted significant interest as sustainable materials for food packaging because of their ability to enhance functional performance and impart antimicrobial properties. This review provides an extensive overview of silver (Ag) and zinc oxide (ZnO) nanoparticles, beginning with their synthesis methods, advantages and disadvantages of the methods. Recent advances in the incorporation of Ag and ZnO nanoparticles into polysaccharide–protein based films are discussed, with emphasis on their effects on physical, mechanical, barrier, optical, thermal, and functional properties. Beyond techno-functional performance, the review discusses the migration of nanoparticles from packaging materials into food matrices and explores the uses of these nanocomposite films in real food. The regulatory frameworks for the use of Ag and ZnO nanoparticles in food contact materials are outlined, and future research directions are suggested, concentrating on migration behavior and the creation of sustainable and regulatory-compliant packaging solutions. This review provides important guidance for examining the impact of nanoparticle synthesis techniques on their characteristics, which are crucial for enhancing techno-functional properties of polysaccharide-protein based film and help to extend the shelf-life of food products.

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