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

作　　者：Long Li Yanan Lu Yu Chen Jiayi Bian Li Wang Li Li 

机构地区：[1]Engineering Research Center of Food Thermal-Processing Technology,College of Food Science and Technology,Shanghai Ocean University,Shanghai,201306,China

出　　处：《Journal of Renewable Materials》2023年第1期291-307,共17页可再生材料杂志（英文）

基　　金：supported by the National Key R&D Program of China(Grant No.2020YFD0900905).

摘　　要：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 mate-rials.These antibacterial microcapsules were then modified with green-synthesized Ag NPs,blended into the bio-polymer 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.

关 键 词：Silver nanoparticles chitosan GELATIN MICROCAPSULES antibacterial activity food packaging 

分 类 号：TB33[一般工业技术—材料科学与工程]