无机材料学报

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催化剂对正硅酸乙酯水解-聚合机理的影响

林健   

  1. 同济大学材料科学与工程学院; 上海200433
  • 收稿日期:1996-04-11 修回日期:1996-05-09 出版日期:1997-06-20 网络出版日期:1997-06-20

The Effect of Catalysts on TEOS Hydrolysis-Condensation Mechanism

LIN Jian   

  1. Institute of Materials Science and Engineering; Tongji University Shanghai 2O0433 China
  • Received:1996-04-11 Revised:1996-05-09 Published:1997-06-20 Online:1997-06-20

摘要: 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.

关键词: 溶胶-凝胶法, SiO2, 正硅酸乙酯, 水解-聚合机理

Abstract: 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.

Key words: sol-gel processing, SiO2, TEOS, hydrolysis- condensation mechanism