Electrokinetic behaviour of polymer colloids with adsorbed Triton X-100

被引：0
|
作者：
M. Romero-Cano
A. Martín-Rodríguez
F. de las Nieves
机构：
[1] Complex Fluids Physics Group,
[2] Department of Applied Physics,undefined
[3] Faculty of Experimental Sciences,undefined
[4] University of Almería,undefined
[5] 04120 Almería,undefined
[6] Spain,undefined
[7] Biocolloid and Fluids Physics Group,undefined
[8] Department of Applied Physics. Faculty of Sciences,undefined
[9] University of Granada,undefined
[10] 18071 Granada,undefined
[11] Spain,undefined
来源：
Colloid and Polymer Science | 2002年 / 280卷
关键词：
Polymer colloids Surfactant–latex complexes Electrophoretic mobility;
D O I：
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中图分类号：
学科分类号：
摘要：
An experimental study on the electrophoretic mobility (µe) of polystyrene particles after adsorption of Triton X-100 (TX100) is described. Three polystyrene particles with different functionality (sulphate, carboxyl and amidine) were used as solid substrate for the adsorption of the surfactant. The electrophoretic mobility of the polystyrene-TX100 complexes at different electrolyte concentrations has been studied versus the amount of adsorbed surfactant. The presence of TX100 onto the colloidal particles seems to produce a slight shifting of the slipping plane. This is observed for electrolyte concentrations above ~10–3 M. On the other hand, the electrophoretic mobilities of the latex–surfactant complexes with maximum surface coverage were measured versus pH and salt concentration. Specific ion interactions between H+/carboxyl groups and OH–/amidine groups appeared at extreme pH which explain the anomalous electrophoretic behaviour encountered in the region where surface charge change.
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页码：526 / 532
页数：6
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