Comparative study on the properties of cross‐linked cellulose nanocrystals/chitosan film composites with conventional heating and microwave curing,Journal of Applied Polymer Science

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Comparative study on the properties of cross‐linked cellulose nanocrystals/chitosan film composites with conventional heating and microwave curing
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-06-26 , DOI: 10.1002/app.49578
Pei Gie Gan ₁ , Sung Ting Sam ₁ , Muhammad Faiq Abdullah ₁ , Mohd Firdaus Omar ₂ , Wai Kian Tan ₃

Affiliation

Cross‐linking of chitosan film composites was carried out by using conventional heating and microwave curing methods in this study. Non‐cross‐linked and glutaraldehyde (GA) cross‐linked neat chitosan and cellulose nanocrystals (CNC)/chitosan film composites were cured by either conventional oven heating or microwave irradiation. Tensile strength and Young's modulus of chitosan composites were enhanced significantly by the addition of CNC and GA especially for the microwave‐cured samples. The changes in chemical interaction of the chitosan film composites was determined by Fourier transform infrared (FTIR) spectroscopy. The microwave‐cured GA‐cross‐linked chitosan film composites were more thermally stable than non‐cross‐linked and conventionally heated GA‐cross‐linked chitosan film composites due to the formation of a more stable structure between GA and chitosan. Nevertheless, the reduced antimicrobial efficacy of film composites against Escherichia coli, Bacillus subtilis, and Saccharomyces cerevisiae was observed in cross‐linked film composites compared with non‐cross‐linked composites.

中文翻译：

常规加热和微波固化交联纤维素纳米晶体/壳聚糖薄膜复合材料性能的比较研究

壳聚糖膜复合材料的交联是通过使用常规加热和微波固化方法进行的。非交联和戊二醛（GA）交联的纯壳聚糖和纤维素纳米晶体（CNC）/壳聚糖薄膜复合材料可通过常规烤箱加热或微波辐射固化。加入CNC和GA可以显着提高壳聚糖复合材料的拉伸强度和杨氏模量，特别是对于微波固化的样品。壳聚糖膜复合材料化学相互作用的变化是通过傅立叶变换红外（FTIR）光谱确定的。微波固化的GA交联的壳聚糖薄膜复合材料比未交联的和常规加热的GA交联的壳聚糖薄膜复合材料更热稳定，因为在GA和壳聚糖之间形成了更稳定的结构。然而，薄膜复合材料的抗微生物功效降低与未交联的复合材料相比，在交联的薄膜复合材料中观察到了大肠杆菌，枯草芽孢杆菌和酿酒酵母。

更新日期：2020-06-26

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