Effect of ionic sizes on the electrophoretic mobility of a particle with a charge-regulated membrane in a general electrolyte solution

被引:14
作者
Huang, SW
Hsu, JP [1 ]
Kuo, YC
Tseng, S
机构
[1] Natl Taiwan Univ, Dept Chem Engn, Taipei 10617, Taiwan
[2] Natl Chung Cheng Univ, Dept Chem Engn, Chiayi 62102, Taiwan
[3] Tamkang Univ, Dept Math, Tamsui 25137, Taipei, Taiwan
关键词
D O I
10.1021/jp011644b
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
The electrophoretic mobility of a planar particle covered by a charge-regulated membrane in a mixed (a:b) + (c:b) electrolyte solution, taking the effect of the sizes of charged species into account, is analyzed theoretically. The influences of the key parameters, which include the frictional coefficient of the membrane layer, pH, membrane thickness, ionic strength, valence of counterions, fixed charge density, fraction of multivalent counterions, dissociation equilibrium constant of the functional groups, and sizes of cations and anions, are discussed. We demonstrate the importance of the ionic steric effects by showing a substantial difference between the classic point-charge model and the present model.
引用
收藏
页码:2117 / 2122
页数:6
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