Translational motion of a spherical particle near a planar liquid-fluid interface.
J Colloid Interface Sci
; 319(1): 344-52, 2008 Mar 01.
Article
em En
| MEDLINE
| ID: mdl-18096181
ABSTRACT
The translational electrophoretic motion of a colloidal spherical particle parallel to a planar liquid-fluid interface is analyzed by using the reciprocal theorem developed by Yariv and Brenner [E. Yariv, H. Brenner, J. Fluid Mech. 484 (2003) 85]. Based on the thin electric double layers assumption, analytical solutions of the forces acting on the particle are obtained, and the influence of the liquid-fluid interface on the electrophoretic velocity of the particle is studied. It is found that the speed of the particle's electrokinetic motion will increase as the separation distance between the particle and the interface decreases. This enhancement of electrophoretic mobility becomes more significant when the viscosity of the fluid phase becomes larger.
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Base de dados:
MEDLINE
Assunto principal:
Coloides
/
Microesferas
/
Modelos Químicos
Idioma:
En
Ano de publicação:
2008
Tipo de documento:
Article