热重分析
结晶度
核化学
热稳定性
壳聚糖
抗氧化剂
傅里叶变换红外光谱
纤维素
化学
极限抗拉强度
没食子酸表没食子酸酯
阿布茨
溶解度
没食子酸
细菌纤维素
高分子化学
化学工程
有机化学
材料科学
多酚
DPPH
复合材料
结晶学
工程类
作者
Xuejiao Wang,Yumei Xie,Hanjing Ge,Lin Chen,Jiali Wang,Shuang Zhang,Yang Guo,Zhixi Li,Xianchao Feng
标识
DOI:10.1016/j.carbpol.2017.09.087
摘要
Films with antioxidant activity were prepared by combining chitosan (CH) and epigallocatechin-3-gallate (EGCG) with nano-bacterial cellulose (BC) as a reinforcement agent. Results showed that BC addition improved the qualities of films jeopardized by EGCG. Fourier Transform Infrared (FTIR) spectroscopy analysis confirmed that there were intermolecular interactions among BC, CH and EGCG though hydrogen bonding. Consequently, BC addition increased the crystallinity and thermal stability of CH-BC5/10-EGCG15/30 films analyzed by X-ray diffraction (XRD) and thermogravimetric (TGA) analysis. BC addition also significantly decreased water solubility (WS), from 26.54% to 20.80%, increased tensile strength (TS), from 18.71 to 44.17 MPa, and increased elongation at break (EAB), from 2.72% to 7.34%. Moreover, BC and EGCG had high affinity for each other, as BC addition lowered the release of EGCG from CH films with a higher ABTS radical scavenging ability. Therefore, BC can be used as a sustained release carrier of EGCG in antioxidant active films.
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