Mesoporous TMOS-MTMS copolymer silica gels catalyzed by fluoride

被引：11

作者：

He, L

Powers, K

Baney, RH ^{[1
]}

Gower, L

Duran, RS

Sheth, P

Carino, SR

机构：

[1] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

[2] Univ Florida, Engn Res Ctr Particle Sci & Technol, Gainesville, FL 32611 USA

[3] Univ Florida, Dept Chem, Butler Polymer Lab, Gainesville, FL 32611 USA

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2001年 / 289卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

Number:; -; Acronym:; NSF; Sponsor: National Science Foundation; UF; Sponsor: University of Florida;

D O I：

10.1016/S0022-3093(01)00698-6

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Mesoporous HF-catalyzed tetramethoxysilane-methyltrimethoxysilane (TMOS-MTMS) copolymer silica gels with average pore diameter from 80 to 100 Angstrom and narrow pore size distribution have been obtained. Mesoporous TMOS-MTMS copolymer gels with tetramethoxysilane ranging from 10% to 100% were also produced with tetrabutylammonium. fluoride (TBAF) catalyst. The pore sizes of TBAF-catalyzed copolymer gels were controlled over a range from 25 to 194 Angstrom. Their pore sizes increased with increasing fluoride content to R-2 = 0.112 (R-2, molar ratio of F/Si) and then level off. The catalytic effect of fluoride on the sol-gel process was investigated. The results suggest that multi-fluorinated silicon species catalyze the silica polymerization. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：97 / 105

页数：9

共 19 条

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