State Key Lab for Modification of Chemical Fibers and Polymer Materials, College of Material Science & Engineering Donghua University, Shanghai 201620, PR China.
State Key Lab for Modification of Chemical Fibers and Polymer Materials, College of Material Science & Engineering Donghua University, Shanghai 201620, PR China.
Int J Biol Macromol. 2014 Mar;64:341-6. doi: 10.1016/j.ijbiomac.2013.12.015. Epub 2013 Dec 17.
In this paper, rod-like chitin whisker was used as a filler to reinforce the chitosan membrane, and a series of composite membranes were prepared by casting-evaporation method. Mechanical testing shows that tensile strength of the resulting composite membrane with 3 wt% chitin whisker content reaches up to 110.3 MPa, which is about 2.8 times than that of neat chitosan membrane (38.5 MPa), and moisture regain of all composite membranes presents a decreasing tendency with increasing content of chitin whisker. Furthermore, SEM was used to investigate the morphology difference between neat chitosan membrane and composite membranes, to understand the reinforce mechanism of chitin whisker. Wide angle x-ray diffraction and Fourier transform infrared spectroscopy were used to visualize the structure change before and after the compositing processes. Besides, the bacterostatic test shows that this composite membrane presents effective inhibitory effect on Staphylococcus aureus, Escherchia coli and Corinebaterium michiganence respectively, which indicates it a promising material for packaging and wound dressing.
本文以棒状甲壳素晶须为填充剂增强壳聚糖膜，采用浇铸-蒸发法制备了一系列复合膜。力学性能测试表明，当甲壳素晶须的含量为 3wt%时，复合膜的拉伸强度达到 110.3MPa，约为纯壳聚糖膜（38.5MPa）的 2.8 倍，所有复合膜的回潮率均随甲壳素晶须含量的增加而呈下降趋势。此外，通过扫描电子显微镜（SEM）研究了纯壳聚糖膜和复合膜之间的形貌差异，以了解甲壳素晶须的增强机理。广角 X 射线衍射和傅里叶变换红外光谱用于可视化复合前后的结构变化。此外，抑菌试验表明，该复合膜对金黄色葡萄球菌、大肠杆菌和密歇根棒状杆菌分别具有有效的抑制作用，表明其有望成为一种有前途的包装和伤口敷料材料。
