摘要
以正硅酸乙酯和常用的有机硅为原料,采用溶胶-凝胶法制备了可紫外光(UV)固化的有机硅/SiO2杂化涂料.研究了有机硅用量对杂化漆膜性能的影响,并用FTIR和固体29Si-NMR对杂化涂料进行了表征,测定了UV固化C C的转化率和硅氧烷的缩聚度.结果表明:杂化涂料的有机与无机网络间以共价键的方式结合,在UV固化240 s时双键转化率可达81.0%,硅氧烷的平均缩聚度为89.5%;由于采用了改进的溶胶-凝胶法,在高度交联的SiO2网络结构中引入线性Si O Si链段,使得漆膜既有高硬度又有良好的柔韧性,当TEOS/MPTMS/DDS摩尔比为6∶2∶3时膜的综合性能最佳.
UV-curable organic silicone/SiO2 hybrid coating was prepared by using the sol-gel method, with tetraethyl-orthosilicate （TEOS） and common organic silicone as the materials, and effect of organic silicone content on the properties of hybrid films from the coating was studied. Then, the hybrid coating was characterized by means of FTIR and solid state ^29Si-NMR. Moreover, the conversion of ethylene linkage and the polycondensation degree of siloxane were determined. It is found that （ 1 ） the inorganic network and organic network in the hybrid coating are joined via covalent bond; （2） the conversion of ethylene linkage and the average polycondensation degree of siloxane for the coating with 240s curing rare respectively 81.0% and 89. 5% ; （3） hybrid film with high rigidity and good flexibility can be obtained by introducing linear Si-O-Si segmers in the highly crosslinked SiO2 network via sol-gel method; and （4） hybrid film with optimal properties can be produced at a TEOS/MPTMS （methacrylate propyl trimethoxysilicate）/DDS （ dimethyl diethylorthosilicate） mole ratio of 6： 2： 3.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第6期76-80,共5页
Journal of South China University of Technology(Natural Science Edition)
基金
福建省自然科学基金资助项目(2006J0150)
作者简介
林金娜（1975-），女，在职博士生，福建农林大学交通学院讲师，主要从事有机／无机杂化材料及高性能涂料研究．E-mail：fafuljn@163．com
通讯作者：曾幸荣，教授，E-mail：psxrzeng@scut．edu．cn
