CHEMICAL MODIFICATION OF METAL ALKOXIDES BY SOLVENTS - A WAY TO CONTROL SOL-GEL CHEMISTRY

被引：76
作者：
NABAVI, M
DOEUFF, S
SANCHEZ, C
LIVAGE, J
机构：
[1] Laboratoire de Chimie de la Matière Condensée URA 302, Université Pierre et Marie Curie, 75252 Paris
来源：
JOURNAL OF NON-CRYSTALLINE SOLIDS | 1990年 / 121卷 / 1-3期
关键词：
D O I：
10.1016/0022-3093(90)90099-8
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：
Solvents can control both the gelation time and the morphology of colloidal particles. They behave as true chemical additives and are able to react with alkoxide precursors changing their structure at a molecular level. Depending on the solvent and the metal, alkoxy bridging solvation or alcohol interchange reaction can be favored. Alcoholysis of titanium and vanadium alkoxides was followed by NMR. This is a fast process that decreases the apparent functionality of the precursor and promotes anisotropic growth of polymeric gels. © 1990.
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页码：31 / 34
页数：4
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