Influence of electrolytes on diffusion properties of colloidal particles in dense suspensions

被引：4
|
作者：
Zhong Cheng [1 ]
Chen Zhi-Quan [2 ]
Yang Wei-Guo [1 ]
Xia Hui [1 ]
机构：
[1] Cent S Univ, Sch Phys & Elect, Changsha 410083, Hunan, Peoples R China
[2] Hunan City Univ, Sch Business, Yiyang 413000, Peoples R China
来源：
ACTA PHYSICA SINICA | 2013年 / 62卷 / 21期
基金：
中国国家自然科学基金;
关键词：
measurement; electrolyte; dense suspension; low-Coherence dynamic light scattering; PRIMITIVE-MODEL ELECTROLYTE; BOVINE SERUM-ALBUMIN;
D O I：
10.7498/aps.62.214207
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The influence of electrolytes on the diffusion properties of polystyrene colloidal particles in dense suspensions is measured by means of phase-modulated fiber optic low-coherence dynamic light scattering. In our experiments, both NaCl and BaCl2 are used as electrolytes. Experiment results show that the diffusion coefficients of the polystyrene colloidal particles increase with the increasing of ion concentration and ion valence when the concentration of electrolyte is below 0.01mol/L and the temperature keeps constant. The diffusion coefficients obtained experimentally show good agreement with the diffusion coefficients obtained by using the Stern model.
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页数：5
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