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.

开发了一种由CMC和各种含量的CNC固定化AgNPs（CNC @ AgNPs）组成的新天然配方，用于纸张涂布。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改善。CMC / CNC @ AgNPs7％的涂布纸的抗张强度提高了1.26倍，WVP降低了45.4％，透气性降低了93.3％，并且对大肠杆菌和金黄色葡萄球菌的最佳抗菌活性与未涂布纸相比。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着降低。此外，CMC / CNC @ AgNPs涂层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，涂布纸可以保持更好的草莓品质，并将草莓的货架期延长至7天。因此，制备的CMC / CNC @ AgNPs涂布纸在食品包装中具有广阔的应用前景。