Covalent linkage of bioactive volatiles to a polysaccharide support as a potential approach for preparing active edible coatings and delivery systems for food products. (15th February 2021)

• Record Type: Journal Article
• Authors: Arnon-Rips, Hadar; Cohen, Yael; Saidi, Lilah; Porat, Ron; Poverenov, Elena
• Is Part Of: Food chemistry. Volume 338(2021)
• Publication Date: 2021-02-15
• Subjects: Active edible coating -- Covalent linkage -- Self-assembly -- Cinnamaldehyde -- Vanillin -- Citral; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2020.127822
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: Active coatings were developed by covalent linkage of vanillin and CNMA to chitosan. The coatings decreased microbial growth on fresh-cut melon without affecting flavor. The modified polymers can self-assemble to aggregates, which encapsulated citral. Citral-containing aggregates reduced spoilage and improve flavor of mandarin juice. Abstract: In this study, a potential of covalent linkage approach for developing active edible coatings was examined. Vanillin and trans- cinnamaldehyde were bound to chitosan by Schiff base reaction and reductive amination. The modified polysaccharides were comprehensively characterized and applied as active coatings on fresh-cut melon. The covalent linkage allowed overcoming solubility problems with the lipophilic vanillin and cinnamaldehyde and neutralizing their volatility, producing well-adhered coatings that enhanced fruit quality and storability without sensorial impairment. The attached hydrophobic moieties also provided new polysaccharides with self-assembling ability. Their aggregates were loaded with antimicrobial citral and added to mandarin juice, resulting in up to 6 log CFU/mL microbial count reduction. Thus, the covalent linkage concept offers several advantages, especially when hydrophobic or volatile active agents are used. Further developed, it may become a safe and effective tool for the formation of advanced active edible coatings and delivery vehicles for direct applications on food products.