Carboxymethyl cellulose/cellulose nanocrystals immobilized silver nanoparticles as an effective coating to improve barrier and antibacterial properties of paper for food packaging applications
Carboxymethyl cellulose/cellulose nanocrystals immobilized silver nanoparticles as an effective coating to improve barrier and antibacterial properties of paper for food packaging applications
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DOI：
10.1016/j.carbpol.2020.117156
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发表时间：
2021-01-15
影响因子：
11.2
通讯作者：
Peng, Lincai
中科院分区：
文献类型：
--
作者：
He, Yunqing;Li, Hui;Peng, Lincai
开发了一种由CMC和不同含量的CNC固定化AgNPs（CNC@AgNPs）组成的用于纸张涂布的新天然制剂。随着CNC@AgNPs含量的增加，CMC/CNC@AgNPs涂布纸的机械强度、水蒸气和空气阻隔性能以及抗菌活性均有所提高。CMC/CNC@AgNPs7%涂布纸的抗张强度是未涂布纸的1.26倍，吸水率降低45.4%，透气率降低93.3%，对大肠杆菌和金黄色葡萄球菌的抗菌活性最好。此外，由于CNC对AgNPs的固定作用，AgNPs从涂布纸的累积释放速率显著降低。此外，CMC/CNC@AgNPs涂布纸用于在环境条件下包装草莓。结果表明，与未包装的草莓相比，涂布纸包装草莓能更好地保持草莓的品质，延长草莓的货架期至7 d。因此，所制备的CMC/CNC@AgNPs涂布纸在食品包装上具有很好的应用前景。
A new natural formulation composed of CMC and various contents of CNC immobilized AgNPs (CNC@AgNPs) was developed for paper coating. The mechanical strength, water vapor and air barrier properties, and antibacterial activities of CMC/CNC@AgNPs coated paper improved with the increasing content of CNC@AgNPs. CMC/CNC@AgNPs7 % coated paper exhibited 1.26 times increase in tensile strength, 45.4 % decrease in WVP, 93.3 % reduction in air permeability as well as the best antibacterial activities against E.coli and S.aureus compared with uncoated paper. Moreover, the cumulative release rate of AgNPs from coated paper significantly reduced due to the immobilization effect of CNC on AgNPs. Furthermore, CMC/CNC@AgNPs coated paper was used to package strawberries under ambient conditions. The results showed that coated paper could maintain better strawberries quality compared with unpackaged strawberries and extend the shelf-life of strawberries to 7 days. Therefore, the prepared CMC/CNC@AgNPs coated paper will have a great application prospect in the food packaging.