Transparent bionanocomposite films based on konjac glucomannan, chitosan, and TEMPO-oxidized chitin nanocrystals with enhanced mechanical and barrier properties
Transparent bionanocomposite films based on konjac glucomannan, chitosan, and TEMPO-oxidized chitin nanocrystals with enhanced mechanical and barrier properties
复制标题
基于魔芋葡甘聚糖、壳聚糖和 TEMPO 氧化甲壳素纳米晶体的透明生物纳米复合薄膜，具有增强的机械和阻隔性能
DOI：
10.1016/j.ijbiomac.2019.07.170
复制
发表时间：
2019
影响因子：
8.2
通讯作者：
Wu Chunhua
中科院分区：
文献类型：
--
作者：
Sun Jishuai;Du Yu;Ma Jiaqi;Li Yuanzhao;Wang Lin;Lu Yinzhu;Zou Junwu;Pang Jie;Wu Chunhua
生物聚合物基食品包装膜的发展由于其环境吸引力、可再生性和生物降解性而日益增加。本研究制备了透明、可生物降解的魔芋葡甘聚糖（KGM）/壳聚糖（CS）/TEMPO-氧化甲壳素（TEMPO-ChNCs）生物纳米复合膜。使用2，2，6，6-四甲基哌啶-1-羟基自由基（克里思）氧化方法从甲壳素制备TEMPO-ChNC，并用作生物纳米复合材料膜的增强纳米填料。研究了TEMPO-ChNC含量对成膜溶液（FFS）的流变性质以及所得膜的结构和物理性质的影响。FFS的流变学结果表明，TEMPO-ChNC与KGM和CS通过静电相互作用和生物纳米复合材料基体中的氢键相互作用，这与傅立叶变换红外光谱和X射线衍射结果一致。膜的微观结构显示，3%（w/w）的TEMPO-ChNC均匀地分散在KGM/CS基质中，减少了生物复合基质的自由体积，并提高了最终膜的机械性能和屏障性能（P < 0.05）。此外，这些生物纳米复合膜表现出良好的热稳定性。将TEMPO-ChNC掺入KGM/CS基质中产生柔性和透明的生物纳米复合膜。因此，这种生物纳米复合膜在食品包装应用中具有潜在的用途。
The development of biopolymer-based films for food packaging is increasing owing to their environmental appeal, renewability, and biodegradability. In this study, transparent and biodegradable konjac glucomannan (KGM)/chitosan (CS)/TEMPO-oxidized chitin nanocrystal (TEMPO-ChNCs) bionanocomposite films were prepared. The TEMPO-ChNCs were prepared from chitin using the 2,2,6,6-tetramethylpiperidine-1-oxylradical (TEMPO) oxidation method and were used as a reinforcement nanofiller for the bionanocomposite films. The effect of TEMPO-ChNCs content on both rheological properties of film-forming solutions (FFS) and structural and physical properties of the resultant films was investigated. The rheological results of the FFS revealed that the TEMPO-ChNCs interacted with KGM and CS through electrostatic interaction and the hydrogen bonds in the bionanocomposite matrix, which was in agreement with the Fourier transform infrared spectroscopy and X-ray diffraction results. The microstructure of the films showed that 3% (w/w) TEMPO-ChNCs were homogeneously dispersed within the KGM/CS matrix, reducing the free volume of the biocomposite matrix and improving the final film mechanical and barrier properties (P < 0.05). Furthermore, these bionanocomposite films exhibited good thermal stability. The incorporation of TEMPO-ChNCs in the KGM/CS matrix produced flexible and transparent bionanocomposite films. Thus, this bionanocomposite films has potential use in food packaging applications.