生物降解
羧甲基纤维素
食物腐败
食品包装
热稳定性
纤维素
化学
涂层
溶解度
化学工程
材料科学
高分子化学
细菌
有机化学
食品科学
工程类
生物
钠
遗传学
作者
Zhenhao Lin,Hao Fu,Yuancheng Zhang,Yongfu Deng,Fuxiang Wei,Hao Li,Chuanhui Xu,Fuli Hua,Baofeng Lin
标识
DOI:10.1016/j.carbpol.2022.120433
摘要
The lack of antimicrobial effect of commercial paper coating for food packaging makes it difficult to prevent food spoilage and harms the environment by non-biodegradation. Herein, carboxymethyl cellulose (CMC) provides negatively charged sites for anchoring Ag+ and Zn2+ to grow AgNPs and ZIF-8 in situ on its molecular chains. The ZIF-8/AgNPs@CMC paper coating has excellent synergistic antibacterial activity to prolong the shelf-life of food. It not only has good thermal stability but binds closely to the paper and its adhesion force reaches 628.9 nN. Besides, the ZIF-8/AgNPs@CMC coated paper has better mechanical properties, water vapor barrier, and resists water solubility. Interestingly, due to the confinement effect of ZIF-8, the cumulative release of AgNPs after 168 h is only 2.66 % to avoid possible food safety risks. Especially, the coating can be almost biodegraded in the soil after 30 days, which provides the possibility to replace the non-biodegradable coatings in food packaging.
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