Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming, 650500, China.
Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming, 650500, China.
Carbohydr Polym. 2021 Jan 15;252:117156. doi: 10.1016/j.carbpol.2020.117156. Epub 2020 Sep 30.
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.
一种由 CMC 和不同含量的固定化 AgNPs 的 CNC 组成的新型天然制剂被开发用于纸张涂层。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得到提高。与未涂布纸相比，CMC/CNC@AgNPs7%涂布纸的拉伸强度提高了 1.26 倍，水蒸气透过率降低了 45.4%，空气透过率降低了 93.3%，对大肠杆菌和金黄色葡萄球菌的抗菌活性也最好。此外，由于 CNC 对 AgNPs 的固定作用，涂层纸上 AgNPs 的累积释放率显著降低。此外，用 CMC/CNC@AgNPs 涂布纸在环境条件下包装草莓。结果表明，与未包装的草莓相比，涂布纸可以更好地保持草莓的品质，并将草莓的保质期延长至 7 天。因此，制备的 CMC/CNC@AgNPs 涂布纸在食品包装方面具有广阔的应用前景。
