High Strength Cellulose Composite Films Reinforced with Clay for Applications as Antibacterial Materials  

作　　者：ding-feng xu 蔡杰 张俐娜 

机构地区：[1]College of Chemistry & Molecule Sciences, Wuhan University, Wuhan 430072, China

出　　处：《Chinese Journal of Polymer Science》2016年第10期1281-1289,共9页高分子科学（英文版）

基　　金：financially supported by the Major Program of National Natural Science Foundation of China(No.21334005);the National Natural Science Foundation of China(No.20874079)

摘　　要：High strength cellulose composite films with antibacterial activities were prepared by dispersing montmorillonites （MMT） into cellulose solution in LiOH/urea aqueous solvent followed by regeneration in ethanol coagulation bath, and then by soaking in 5 wt% hexadecylpyridine bromide ethanol solutions to induce the antibacterial action. The cellulose/MMT composite films were characterized by field emission scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, FTIR, UV-spectra, wide angle X-ray diffraction and mechanical test. The results revealed that MMT was dispersed well in the cellulose matrix to form layer structure with a thickness of approximately 3 nm. The mechanical properties of the cellulose/MMT composite films were significantly improved to achieve 132 MP for tensile strength as a result of the MMT delamination. The hexadecylpyridine bromide was fixed well in the cellulose/MMT matrix through cation exchange, leading to the excellent antibacterial activities against Staphylococcus aureus and Escherichia coli, which is important in their practical applications.High strength cellulose composite films with antibacterial activities were prepared by dispersing montmorillonites （MMT） into cellulose solution in LiOH/urea aqueous solvent followed by regeneration in ethanol coagulation bath, and then by soaking in 5 wt% hexadecylpyridine bromide ethanol solutions to induce the antibacterial action. The cellulose/MMT composite films were characterized by field emission scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, FTIR, UV-spectra, wide angle X-ray diffraction and mechanical test. The results revealed that MMT was dispersed well in the cellulose matrix to form layer structure with a thickness of approximately 3 nm. The mechanical properties of the cellulose/MMT composite films were significantly improved to achieve 132 MP for tensile strength as a result of the MMT delamination. The hexadecylpyridine bromide was fixed well in the cellulose/MMT matrix through cation exchange, leading to the excellent antibacterial activities against Staphylococcus aureus and Escherichia coli, which is important in their practical applications.

关 键 词：Cellulose/MMT composite films Antibacterial activities High strength Hexadecylpyridine bromide. 

分 类 号：TB383.2[一般工业技术—材料科学与工程]