Structural evolution of a formamide modified sol - Spectroscopic study

被引：22

作者：

Viart, N ^{[1
]}

Niznansky, D ^{[1
]}

Rehspringer, JL ^{[1
]}

机构：

[1] ASCR,INST INORGAN CHEM,PRAGUE 25068,CZECH REPUBLIC

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 1997年 / 8卷 / 1-3期

关键词：

gelation mechanism; structural evolution; formamide; FTIR;

D O I：

10.1007/BF02436838

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：

We investigated the influence of formamide on the acid-catalyzed sol-gel process at 40 degrees C, by Fourier transformed infrared spectroscopy. Two silica sols were studied: one containing formamide and one without. Following the time evolution of both the Si-O(H) stretching vibration at around 950 cm(-1) and the Si-O(-Si) vibration between 1080 and 1200 cm(-1), we were able to describe the structural evolution of each sol. We thus observed, in the case of the formamide containing sol, a peculiar two-step structural evolution which eventually resulted in a highly interconnected gel.

引用

页码：183 / 187

页数：5

共 11 条

[1] THE ROLE OF N,N-DIMETHYLFORMAMIDE, A DCCA, IN THE FORMATION OF SILICA-GEL MONOLITHS BY SOL-GEL METHOD [J].