ADSORPTION LAYERS OF POLY(ETHYLENE OXIDE) ON QUARTZ STUDIED USING CAPILLARY ELECTROKINETICS

被引：32

作者：

CHURAEV, NV

SERGEEVA, IP

SOBOLEV, VD

ZORIN, ZM

GASANOV, EK

机构：

[1] The Institute of Physical Chemistry, the Russian Academy of Sciences, Laboratory of Thin Layers of Liquids, Moscow, 117915

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 1993年 / 76卷

关键词：

ADSORPTION LAYERS; CAPILLARY ELECTROKINETICS; POLY(ETHYLENE OXIDE); QUARTZ SURFACE;

D O I：

10.1016/0927-7757(93)80057-L

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 adsorption of poly(ethylene oxide) (PEO) molecules decreases the electrokinetic potential of a quartz surface. The corresponding change in electrostatic forces may influence the interaction between colloidal particles in polymer solutions. The equilibrium between flowing PEO solution and adsorption layers in thin quartz capillaries is established after 1-2 h. The kinetics may be controlled by the attachment and reconformation of polymer molecules in the adsorbed layers. The saturated adsorption layers of PEO are easily deformed under the action of the shear stress of the flowing solution. The effect of shear stress requires further investigation using joint measurements of the adsorption and the hydrodynamic and electrokinetic thicknesses of the adsorption layers. The thin quartz capillaries represent a simple model system with a well-characterized geometry and a molecularly smooth surface. Capillary electrokinetics may effectively be used for the investigation of electrosurface phenomena in polymer solutions.

引用

页码：23 / 32

页数：10

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