Xie Yuanjian, Cai Pingxiong, Cao Xiaofeng, Chen Bo, Pan Yuanfeng
Guangxi Key Laboratory of Green Chemical Materials and Safety Technology, Guangxi Engineering Research Center for New Chemical Materials and Safety Technology, College of Petroleum and Chemical Engineering, Beibu Gulf University, Qinzhou 535011, China.
Guangxi Colleges and Universities Key Laboratory of New Technology and Application in Resource Chemical Engineering, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
ACS Omega. 2024 Dec 11;9(51):50403-50413. doi: 10.1021/acsomega.4c07173. eCollection 2024 Dec 24.
To solve the problems that poly(vinyl alcohol) (PVA) easily breeds bacteria and swells in a humid environment, PVA and ZnO nanopillar (ZnO NP) components were composed to generate PVA/ZnO NP composite films via a simple combination process of blending and heat treatment in this study. Here, ZnO NPs endowed composite films with good antibacterial properties, and the etherification and dehydration of hydroxyl groups between PVA molecular chains induced by heat treatment resulted in the composite films having excellent water-swelling resistance. Most importantly, PVA/ZnO NP composite films revealed excellent tensile strength in both humid (52.85 MPa) and dry (74.63 MPa) environments. In addition, PVA/ZnO NP composite films showed good antibacterial and antisepsis abilities as well as preservation functions in the packaging test of half-cut apples. The current work disclosed an easy strategy for producing a PVA-based antibacterial film for packaging materials that are water-resistant and highly strong, making them suitable for applications in humid environments.
为了解决聚乙烯醇（PVA）在潮湿环境中易滋生细菌和膨胀的问题，本研究通过简单的共混和热处理组合工艺，将PVA与氧化锌纳米柱（ZnO NP）组分复合，制备出PVA/ZnO NP复合薄膜。在此，ZnO NPs赋予复合薄膜良好的抗菌性能，热处理引发的PVA分子链间羟基的醚化和脱水反应使复合薄膜具有优异的抗水溶胀性。最重要的是，PVA/ZnO NP复合薄膜在潮湿（52.85 MPa）和干燥（74.63 MPa）环境中均表现出优异的拉伸强度。此外，在半切苹果的包装测试中，PVA/ZnO NP复合薄膜展现出良好的抗菌防腐能力以及保鲜功能。当前的工作揭示了一种简便的策略，可用于制备用于包装材料的基于PVA的抗菌薄膜，该薄膜具有防水性且强度高，适用于潮湿环境中的应用。
