PHASE-SEPARATION IN SILICA SOL-GEL SYSTEM CONTAINING POLYACRYLIC-ACID .1. GEL FORMATION BEHAVIOR AND EFFECT OF SOLVENT COMPOSITION

被引：295

作者：

NAKANISHI, K

SOGA, N

机构：

[1] Department of Industrial Chemistry, Faculty of Engineering, Kyoto University, Kyoto

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1992年 / 139卷 / 01期

关键词：

D O I：

10.1016/S0022-3093(05)80800-2

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：

Phase separations of gelling solutions have been investigated for acid-catalyzed, alkoxysilane-based systems containing polyacrylic acid (HPAA). Gels with micrometer-range interconnected porous morphologies were obtained in a composition range broader than that reported for the systems containing sodium polystyrene sulfonate. It is suggested that the data of a light-scattering experiment can be explained by the occurrence of spinodal phase separation which forms an interconnected morphology. The analogy between a chemical crosslinking reaction and a finite-rate cooling of a network-forming liquid is introduced, on which basis the effects of compositional parameters on the resultant gel morphology are explained.

引用

页码：1 / 13

页数：13

共 15 条

[1]

[Anonymous], 1990, DRYING SOL GEL SCI, DOI [10.1016/B978-0-08-057103-4.50013-1, DOI 10.1016/B978-0-08-057103-4.50013-1]

[2] ON SPINODAL DECOMPOSITION [J].