纳米TiO2原位杂化聚氨酯及其抗菌防霉性能研究  

Nano-TiO_2 In-situ Reinforced Polyurethane Membranes with Antimicrobial Activity

作　　者：陈意[1] 冯萍[1] 范浩军[1] 张秀丽[1] 周虎[1] 袁继新[2] 刘若望[2] 

机构地区：[1]皮革化学与工程教育部重点实验室(四川大学),四川成都610065 [2]温州大学化学与材料科学学院,浙江温州325024

出　　处：《皮革科学与工程》2008年第3期11-15,共5页Leather Science and Engineering

基　　金：浙江省重大科技专项课题资助项目(2007C11100);国家863项目资助(2007AA03Z341)

摘　　要：采用原位有机—无机杂化技术将纳米TiO2引入合成革用聚氨酯膜中,并对杂化薄膜的截面形态、抗菌防霉性能和力学性能进行了检测。结果表明:无机纳米TiO2颗粒在聚氨酯杂化膜中分布均匀,且其粒径与TiO2的含量有关。当TiO2的含量从0.25%提高到1.00%时,纳米TiO2的平均尺寸相应的由40-50 nm增加到90-110nm。该杂化膜不仅对细菌(金黄色葡萄球菌和大肠杆菌)的生长有抑制作用,而且还表现出优异的防霉(黑曲霉)性能。同时,纳米TiO2的原位引入对聚氨酯薄膜有增强、增韧的作用。A series of polyurethane （PU） membranes with different nano-TiO2 content were prepared via an in-situ organic-inorganic hybrid process, and the cross section morphologies, antimicrobial activity and mechanical properties of the hybrid samples were investigated, respectively. SEM analysis indicated that with an increasing content of TiO2from 0. 25% to 1.00%, the average size of nano particles, which dispersed homogeneously in the polymer matrix, appeared to increase correspondingly from 40-50 nm to 90-110 nm without large agglomerates observed. These nano-TiO2 hybrid PU membranes exhibited excellent antimicrobial activity against Staphylococcus aureu, Escherichia coli and Aspergillus niger, and possessed simultaneously improved tensile strength and elongationa at break, which might be of great potential for application in the manufacture of PU synthetic leather.

关 键 词：聚氨酯合成革 纳米TIO2 原位杂化 抗菌防霉 

分 类 号：TS565[轻工技术与工程—皮革化学与工程]