THEORY OF CONDUCTANCE OF COLLOIDAL ELECTROLYTES IN UNIVALENT SALT-SOLUTIONS

被引:30
作者
STIGTER, D
机构
[1] Western Regional Research Center, SEA, USDA, Albany
关键词
D O I
10.1021/j100475a017
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 conductance theory in this paper is a sequel of the recent treatment of the electrophoresis of highly charged colloidal cylinders with a Gouy-Chapman type electrical double layer, allowing for the same hydrodynamic and electrostatic interactions: electrophoretic hindrance and relaxation effect. The approach accounts in detail for the transport of the small ions near the colloid particle. The interaction between colloid particles is neglected. The theory is developed for randomly oriented, long cylinders (no end effects). For spherical colloids only the final expressions are given. In both cases the colloid conductance is expressed in terms of interaction integrals. These integrals have been evaluated by extending the computer programs written earlier for the electrophoresis problem. Conductance and electrophoresis depend on the same parameters: the reduced surface potential and the reduced radius of the colloid, and the reduced mobilities of the small ions. Numerical results are presented that span the range of practical interest of these parameters for colloid spheres and cylinders in univalent salt solutions, including new data on electrophoresis.
引用
收藏
页码:1663 / 1670
页数:8
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