Motion of microgel particles under an external electric field

被引：47

作者：

Fernández-Nieves, A

Fernández-Barbero, A

de las Nieves, FJ ^{[1
]}

Vincent, B

机构：

[1] Univ Almeria, Dept Appl Phys, Grp Complex Fluid Phys, Almeria 04120, Spain

[2] Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2000年 / 12卷 / 15期

关键词：

D O I：

10.1088/0953-8984/12/15/309

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The influence of the swelling of charged microgel particles on their motion under an external electric field has been studied. The selected experimental observable was the electrophoretic mobility of the particles, which was measured as a function of the pH since its value controls the electrical charge of the particles. The mobility-pH curve presents a maximum and a minimum as a consequence of the competition between charge-density and friction coefficient variations during swelling. Ohshima's theory for polyelectrolyte-coated particles was employed, describing qualitatively the experimental results. Quantitative discrepancies suggest that charge renormalization should be considered.

引用

页码：3605 / 3614

页数：10

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