Some remarks on coalescence in emulsions or foams

被引：43

作者：

de Gennes, PG ^{[1
]}

机构：

[1] Coll France, F-75231 Paris 05, France

来源：

CHEMICAL ENGINEERING SCIENCE | 2001年 / 56卷 / 19期

关键词：

emulsions; foams; coalescence; soap films;

D O I：

10.1016/S0009-2509(01)00170-1

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Intrinsic coalescence (corresponding to the opening of a hole in a surfactant monolayer) is important only for poor surfactants. With good surfactants, and in usual industrial conditions, coalescence is extrinsic, and mainly due to dirt particles. In the present note, we first analyze the motions of one dirt particle inside an initially monodisperse O/W emulsion. The particle remains trapped at the surface of a growing oil droplet, of size R(t) similar to t(1/3). If we now go to a very dilute system of dirt particles, we expect that they generate first a collection of large drops. Ultimately, these large drops come into contact, and one may end up with an oil matrix containing droplets of the O/W emulsion. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：5449 / 5450

页数：2