The ζ-potential for a concentrated colloidal dispersion: The colloidal primitive model vs. the cell model

被引：20
|
作者：
Manzanilla-Granados, Hector M. [1 ]
Jimenez-Angeles, Felipe [1 ]
Lozada-Cassou, Marcelo [1 ]
机构：
[1] Inst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, Mexico
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2011年 / 376卷 / 1-3期
关键词：
zeta-potential; Concentrated colloidal dispersion; Colloidal primitive model; Cell model; Integral equations; Poisson-Boltzmann; ELECTRIC DOUBLE-LAYER; CHARGE INVERSION; ELECTROPHORETIC MOBILITY; ELECTROSTATIC ATTRACTION; PHASE-SEPARATION; MONTE-CARLO; ELECTROLYTE; PARTICLES; COUNTERIONS; MACROION;
D O I：
10.1016/j.colsurfa.2010.11.005
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 colloidal primitive model (CPM) for a concentrated colloidal dispersion is studied through the well established hypernetted chain/mean spherical approximation integral equations theory (HNC/MSA-CPM). For comparison the corresponding cell model (CM) theory and other simpler approaches are calculated. Important deviations of the CM results, are found: The HNC/MSA-CPM theory predicts a polarity inversion of zeta-potential for several conditions, always associated with charge reversal, whereas none of the other approaches predict such an inversion. We discuss the possible implications of our results in relation to electrophoretic mobility. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：59 / 66
页数：8
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