Surface-tension-driven flow due to the adsorption and desorption of colloidal particles

被引:12
作者
Casson, K [1 ]
Johnson, D [1 ]
机构
[1] Univ Alabama, Dept Chem Engn, Tuscaloosa, AL 35487 USA
关键词
interfacial tension; colloidal particles; interfacial tension gradients; capillary charge; Marangoni flow;
D O I
10.1006/jcis.2001.7870
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
When a dilute colloidal suspension of 50-mum polyamide particles is exposed to a deformable interface, spontaneous flow occurs. This flow is orderly, reproducible, and shows a proportional dependence on particle concentration. The same type of flow was also observed in a silicon oil suspension. Placing a glass plate on the interface dampens the flow, eventually extinguishing it completely. Upon removing the plate, the flow resumes. This leads to the belief that a new surface effect is being observed and may be important in a number of industrial applications where a free interface of a colloidal suspension is present. (C) 2001 Academic Press.
引用
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页码:279 / 283
页数:5
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