Antibacterial Chitosan-Gelatin Microcapsules Modified with Green-Synthesized Silver Nanoparticles for Food Packaging

4区材料科学 Q2 Environmental Science

Journal of Renewable Materials Pub Date : 2023-01-01 DOI:10.32604/jrm.2022.021456

Long Li, Yanan Lu, Yu Chen, Jiayi Bian, Li Wang, Li Li

引用次数: 7

Abstract

Silver nanoparticles (Ag NPs) are an effective antibacterial agent, but their application in food packaging is limited due to their easy agglomeration and oxidation. In this study, antibacterial microcapsules were fabricated using Ginkgo biloba essential oil (GBEO) as core material and chitosan and type B gelatin biopolymer as capsule materials. These antibacterial microcapsules were then modified with green-synthesized Ag NPs, blended into the biopolymer polylactic acid (PLA), and finally formed as films. Physicochemical properties and antibacterial activity against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) were evaluated. Results showed that the prepared antibacterial PLA films exhibited excellent antibacterial activity against foodborne pathogens. Its TVC exceeded the limit value of 7 log CFU/g at 7 days compared with the 5 days of pure PLA films. Therefore, these films can extend the shelf life of grass carp fillets by 2–3 days under refrigeration.

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绿色合成纳米银修饰抗菌壳聚糖-明胶微胶囊用于食品包装

银纳米粒子是一种有效的抗菌剂，但由于其易团聚和氧化，限制了其在食品包装中的应用。本研究以银杏精油(GBEO)为核心材料，壳聚糖和B型明胶生物聚合物为胶囊材料制备抗菌微胶囊。然后用绿色合成的Ag NPs修饰这些抗菌微胶囊，混合到生物聚合物聚乳酸(PLA)中，最终形成薄膜。对其理化性质及对大肠杆菌和金黄色葡萄球菌的抑菌活性进行了评价。结果表明，制备的聚乳酸抗菌膜对食源性致病菌具有良好的抗菌活性。与纯PLA膜相比，其TVC在第7天超过了7 log CFU/g的极限值。因此，这些薄膜可以使草鱼鱼片在冷藏条件下的保质期延长2-3天。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Renewable Materials Materials Science, Composites; Polymer Science; Green & Sustainable Science & Technology-

CiteScore

4.10

自引率

0.00%

发文量

125

期刊介绍： This journal publishes high quality peer reviewed original research and review articles on macromolecules and additives obtained from renewable/biobased resources. Utilizing a multidisciplinary approach, JRM introduces cutting-edge research on biobased monomers, polymers, additives (both organic and inorganic), their blends and composites. JRM showcases both fundamental aspects and applications of renewable materials. The fundamental topics include the synthesis and polymerization of biobased monomers and macromonomers, the chemical modification of natural polymers, as well as the characterization, structure-property relationships, processing, recycling, bio and environmental degradation and life cycle analysis of the ensuing materials, in view of their potential applications. Within this sustainability approach, green chemistry processes and studies falling within biorefinery contexts are strongly favored.