Stabilization and characterization of colloidal gas aphron dispersions

被引：40

作者：

Dai, YJ ^{[1
]}

Deng, T ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2003年 / 261卷 / 02期

基金：

中国国家自然科学基金;

关键词：

bubble stabilization; encapsulation; colloidal gas aphrons; silica sol; cationic surfactant;

D O I：

10.1016/S0021-9797(03)00056-0

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：

Colloidal gas aphrons (CGAs) are finding increasing application in water processing, bioseparation, bubble-entrained floc flotation, separation of oil from sand, etc. This article proposes an effective method of encapsulation to stabilize the CGA bubbles with silicic sol solution for their characterization. The stabilized CGA bubbles can keep shapes and sizes for at least 12 h; even the bubbles smaller than 25 mum can also be stabilized and exist for very long times. Effects of concentration and pH of silicic sol solution on CGA stabilization were studied. Tile optimal ranges of concentration and pH of silicic sol solution are 0.15-0.25 mol/dm(3) and 7-10, respectively. The bubble distortion behavior in disturbance and size distribution of CGAs were examined by using the stabilization method and photographic techniques. (C) 2003 Elsevier Science (USA.). All rights reserved.

引用

页码：360 / 365

页数：6

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