Electrostatic Stabilization of Charged Colloidal Particles with Adsorbed Polyelectrolytes of Opposite Charge

被引：114

作者：

Hierrezuelo, Jose ^{[1
]}

Sadeghpour, Amin ^{[1
]}

Szilagyi, Istvan ^{[1
]}

Vaccaro, Andrea ^{[1
]}

Borkovec, Michal ^{[1
]}

机构：

[1] Univ Geneva, Dept Inorgan Analyt & Appl Chem, CH-1205 Geneva, Switzerland

来源：

LANGMUIR | 2010年 / 26卷 / 19期

基金：

瑞士国家科学基金会;

关键词：

LATEX-PARTICLES; SURFACE-CHARGE; AGGREGATION; FLOCCULATION; SUSPENSIONS; STABILITY; FORCES; ASSOCIATION; DENDRIMERS; ADSORPTION;

D O I：

10.1021/la102912u

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Repulsive electrostatic double-layer forces are responsible for the stabilization of charged colloidal particles in the presence of adsorbed polyelectrolytes of opposite and high line charge densities. This mechanism is revealed by studies of electrophoretic mobility and colloidal stability performed with dynamic light scattering as a function of the polyelectrolyte dose and the ionic strength for two different types of latex particles and four different types of polyelectrolytes. The dependence of these quantities is very similar for hare charged latex particles and the same particles in the presence of the different oppositely charged polyelectrolytes. Positively charged particles in the presence of anionic polyelectrolytes behave analogously to negatively charged particles in the presence of cationic polyelectrolytes.

引用

页码：15109 / 15111

页数：3

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