Li Yujie, Chen Yifan, Wu Qiang, Huang Jingda, Zhao Yadong, Li Qian, Wang Siqun
College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou 311300, China.
School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan 316022, China.
Polymers (Basel). 2022 Apr 22;14(9):1705. doi: 10.3390/polym14091705.
In this study, we reported PVA nanocomposite films enhanced by polyethyleneimine (PEI)-lignin contained cellulose nanofibers (LCNFs) via the solvent casting method. An easy and available method was preformed to prepare LCNFs using a supermasscolloider from unbleached bamboo waste after a mild alkaline pretreatment. The results demonstrate that LCNF-PEI can greatly improve mechanical, hydrophobic, anti-UV shielding and antibacterial properties of the composite films. The tensile strength of LPP1 film was improved to 54.56 MPa, which was higher than 39.37 MPa of PVA film. The water contact angle of films increased from 35° to 104° with an increase in LCNF content from 0 to 6 wt%. Meanwhile, the nanocomposite film demonstrated the effect of full shielding against ultraviolet light when the amount of LCNF-PEI reached 6 wt%. The addition of LCNF-PEI endowed excellent antibacterial activity (against and ), which indicated potential applications in the packaging field.
在本研究中，我们报道了通过溶剂浇铸法制备的由含纤维素纳米纤维（LCNFs）的聚乙烯亚胺（PEI）-木质素增强的聚乙烯醇（PVA）纳米复合薄膜。采用一种简单可行的方法，在温和的碱性预处理后，使用超微胶体磨从未漂白的竹废料中制备LCNFs。结果表明，LCNF-PEI能显著提高复合薄膜的机械性能、疏水性、抗紫外线屏蔽性能和抗菌性能。LPP1薄膜的拉伸强度提高到54.56MPa，高于PVA薄膜的39.37MPa。随着LCNF含量从0增加到6wt%，薄膜的水接触角从35°增加到104°。同时，当LCNF-PEI的含量达到6wt%时，纳米复合薄膜表现出完全屏蔽紫外线的效果。添加LCNF-PEI赋予了优异的抗菌活性（针对 和 ），这表明其在包装领域具有潜在应用。
