关键词: 有机硅, 杂化涂料, 溶胶-凝胶法, UV 固化

Abstract:

UV -curable organic silicone/Si02 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 Si02 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.

Key words: organic silicone, hybrid coating, sol-gel method, UV curing