Influence of gelation temperature and catalysts on the mesoporous structure of resorcinol-formaldehyde aerogels

被引：32

作者：

Tamon, H ^{[1
]}

Ishizaka, H ^{[1
]}

机构：

[1] Kyoto Univ, Dept Chem Engn, Kyoto 6068501, Japan

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2000年 / 223卷 / 02期

关键词：

resorcinol-formaldehyde aerogel; sol-gel polycondensation; supercritical drying; mesoporosity; nitrogen adsorption; base catalysts; gelation temperature;

D O I：

10.1006/jcis.1999.6640

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Resorcinol-formaldehyde (RF) hydrogels were synthesized by sol-gel polycondensation of resorcinol with formaldehyde using a few kinds of catalysts at a gelation temperature of 238 or 332 K. RF aerogels were prepared by supercritical drying with carbon dioxide. The aerogels were characterized by nitrogen adsorption. The experimental results suggest that the gelation temperature does not greatly influence the porous properties and that sodium hydroxide and sodium hydrogencarbonate can be used as catalysts in the preparation of the aerogels. (C) 2000 Academic Press.

引用

页码：305 / 307

页数：3

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