INFRARED-SPECTROSCOPY OF SILICA SOLS - EFFECTS OF WATER CONCENTRATION, CATALYST, AND AGING

被引：29

作者：

CHU, PY ^{[1
]}

CLARK, DE ^{[1
]}

机构：

[1] UNIV FLORIDA,DEPT MAT SCI & ENGN,GAINESVILLE,FL 32611

来源：

SPECTROSCOPY LETTERS | 1992年 / 25卷 / 02期

关键词：

INFRARED SPECTROSCOPY; SILICA SOLS; AGING;

D O I：

10.1080/00387019208020687

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Silica sols were investigated by Fourier transform infrared spectroscopy (FT-IR). The influences of water content, pH, and aging were studied. It was observed that the silica network gradually formed during aging and a more linear structure was present in the sol with low water content while high-water content sol possessed a more branched structure. The hydrolysis reaction was very fast in the sols with low pH compared with that in the high pH sols. Additionally, the sols with low pH had a greater concentration of silanol groups remaining after aging when compared with those with high pH. The IR spectra provide supplementary information about the sol to gel transformation and structure evolution.

引用

页码：201 / 220

页数：20

共 22 条

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