SUPERCRITICAL DRYING OF SIO2-TIO2 SOL-PILLARED CLAYS

被引：20

作者：

TAKAHAMA, K ^{[1
]}

YOKOYAMA, M ^{[1
]}

HIRAO, S ^{[1
]}

YAMANAKA, S ^{[1
]}

HATTORI, M ^{[1
]}

机构：

[1] HIROSHIMA UNIV,FAC ENGN,DEPT APPL CHEM,HIROSHIMA 734,JAPAN

来源：

JOURNAL OF MATERIALS SCIENCE | 1992年 / 27卷 / 05期

关键词：

D O I：

10.1007/BF01142041

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The interlayers of montmorillonite clay were pillared with silica-titania sol particles by ion exchange in aqueous solutions. The water in the pillared clay was substituted with ethanol which was in turn extracted with CO2 under supercritical conditions. This drying procedure avoids the formation of liquid-vapour interfaces which give rise to shrinkage of the swelled pillared structure. Highly porous structures with well developed card-house structures resulted. The pore structure was investigated and compared with that of samples prepared by conventional air-drying procedures.

引用

页码：1297 / 1301

页数：5

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