SILICA MICROSPHERES FROM THE SYSTEM TETRAETHYL ORTHOSILICATE ACETIC-ACID WATER

被引:46
作者
KARMAKAR, B
DE, G
KUNDU, D
GANGULI, D
机构
[1] Sol-Gel Laboratory, Central Glass and Ceramic Research Institute, Calcutta
关键词
D O I
10.1016/0022-3093(91)90439-D
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
Dense silica microspheres (density 2.11-2.16 g cm-3) were obtained from a range of molar compositions tetraethyl orthosilicate (TEOS):CH3COOH:H2O = 1 :(0.5-4.0):(1.5-5.0), FTIR spectroscopic studies of the reaction between TEOS and CH3COOH in the presence and absence of water showed that acetic acid readily attacked TEOS and generated Si-OH groups via the formation of Si-OOCCH3 groups; (OH)-(OH) condensation finally led to the formation of silica particles.
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页码:29 / 36
页数:8
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