Structurization of Aerosil OX50 dispersions

被引：3

作者：

Semenov, AD ^{[1
]}

Golikova, EV ^{[1
]}

Grigor'ev, VS ^{[1
]}

Kulagin, KM ^{[1
]}

机构：

[1] SI Vavilova State Res Ctr, Gosudarstvennyi Opt Inst, St Petersburg, Russia

来源：

RUSSIAN JOURNAL OF GENERAL CHEMISTRY | 2002年 / 72卷 / 01期

关键词：

D O I：

10.1023/A:1015368506678

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Structural and mechanical properties of aqueous dispersions of Aerosil OX50 were studied by rotary viscometry. The thixotropic properties of concentrated (20-50 wt %) Aerosil dispersions used in the sol-gel synthesis of quartz glass are due to structurization caused by appreciable overlapping of the electrical double layers of the particles. The particle interaction occurring in a limited volume is accompanied by formation of periodic colloidal structures of the second kind. The viscoplastic properties and extrema in the pH dependence of the viscosity are explained in terms of collective interaction of Aerosil particles according to the Deryagin-Landau-Verwey-Overbeek (DLVO) theory.

引用

页码：17 / 25

页数：9

共 47 条

[1] BACHMANN PK, 1989, AM CERAM SOC BULL, V68, P1826
[2] Hamaker constants of inorganic materials
Bergstrom, L
[J]. ADVANCES IN COLLOID AND INTERFACE SCIENCE, 1997, 70 : 125 - 169
[3] CHERNOBEREZHSKI.YM, 1983, POVERKHNOSTNYE SILY, P117
[4] CHURAEV NV, 1984, KOLLOID ZH, V44, P302
[5] PREPARATION OF HIGH-PURITY SILICA GLASS TUBES BY CENTRIFUGAL CASTING OF COLLOIDAL GELS
CLASEN, R
[J]. JOURNAL OF MATERIALS SCIENCE LETTERS, 1988, 7 (05) : 477 - 478
[6] CLASEN R, 1987, GLASTECH BER-GLASS, V60, P125
[7] Deryagin B., 1941, Zh. Eksp. Teor. Fiz, V11, P802
[8] Deryagin B.V., 1986, TEORIYA USTOICHIVOST
[9] Deryagin B.V., 1985, POVERKHNOSTNYE SILY
[10] DERYAGIN BV, 1967, DOKL AKAD NAUK SSSR+, V176, P869

← 1 2 3 4 5 →