催化剂对正硅酸乙酯水解-聚合机理的影响

The Effect of Catalysts on TEOS Hydrolysis-Condensation Mechanism

运用溶胶-凝胶法制备SiO2凝胶，研究了催化剂对正硅酸乙酯的水解-聚合机理及凝胶结构的影响．结果表明催化剂阴离子尺寸导致了不同的水解机理，不同的催化方式及催化剂浓度、pH值、反应水量等对凝胶化时间、结构均有明显影响．

SiO2 gels were prepared by Sol-Gel processing, the influence of catalysts on the hydrolysiscondensation and structure of the gel was studied. The radius of negative ions determines thehydrolysis-condensation mechanism. Different catalysis ways and catalyst concertration, pH value,water content have great influence on the gelation time and the structure of SiO2 gel.