ADSORPTION OF NEUTRAL POLYMERS AND POLYELECTROLYTES ON MODEL COLLOID PARTICLES BY ELECTROOPTICS

被引：0
|
作者：
PETKANCHIN, IB
机构：
来源：
MACRO-ION CHARACTERIZATION: FROM DILUTE SOLUTIONS TO COMPLEX FLUIDS | 1994年 / 548卷
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暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The adsorption of polymers and polyelectrolytes modifies the electric surface properties of colloidal particles-e.g. their charge, electric polarizability and the dynamic properties of electric double layer. These changes lead to a change of the suspension stability. The electro-optic method of investigation gives the possibility to obtain information for electric dipole moments of the particles as well as on their dimensions. The influence of neutral polymer (polyacrylamide) and polyelectrolytes (carboxy-methyl cellulose) on the surface properties of model oxide particles, clays and mica is studied electro-optically. From the transient electro-optical measurements the thickness of the neutral adsorbed polymer layer is calculated. The changes of the electric surface properties and their dynamics are established. The results obtained show the connection of the particles electric moments with the conformational properties of the adsorbed layers.
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页码：436 / 448
页数：13
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