壳聚糖
材料科学
纳米晶
化学工程
淀粉
液晶
铸造
图层(电子)
纤维素
逐层
柠檬酸
复合材料
纳米技术
有机化学
化学
光电子学
工程类
作者
Amin Babaei-Ghazvini,Bishnu Acharya,Darren R. Korber
标识
DOI:10.1016/j.carbpol.2021.118709
摘要
In this study, a new approach to employ and control cellulose nanocrystal (CNC) chiral nematic structure as a biodegradable, intelligent material was investigated. Tuned CNC self-assembled films were interlocked between two layers of citric acid, cross-linked starch/chitosan (1:1) films through the solvent casting process. This method increased the mechanical properties of produced films and created a selective reflection band from UV to near-IR depending on the helical pitch of the chiral nematic CNC layer. The features of these intelligent films have potential for different applications, from UV protective packaging to biomedical uses. The water vapor permeability (WVP) of the produced films decreased considerably by adding a CNC layer into the cross-linked starch/chitosan structure. Also, the WVP was different for the different helical pitches of the CNC layer. The starch/chitosan (outer layer) also showed a remarkable antibacterial property against E. coli, P. fluorescens, S. Enteritidis, and S. aureus which could be useful for biomedical applications or antibacterial packaging.
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