Electrophoretic mobility and swelling behaviour of 2-acrylamido-2-methylpropane sulphonic acid/poly(N-isopropylacrylamide) microgel particles

被引：0
作者：
García-Salinas, MJ [1 ]
Romero-Cano, MS [1 ]
de las Nieves, FJ [1 ]
机构：
[1] Univ Almeria, Dept Appl Phys, Complex Fluids Phys Grp, Almeria 04120, Spain
来源：
TRENDS IN COLLOID AND INTERFACE SCIENCE XV | 2001年 / 118卷
关键词：
soft core-shell particles; swelling; electrophoretic mobility;
D O I：
暂无
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：
A microgel system has been characterized by measuring the size (by photon correlation spectroscopy) and the electrophoretic mobility in different conditions. The microgel particles are poly(N-isopropylacrylamide) cross- linked with N,N'-methylene bisacrylamide, and the anionic charge of this system is increased by copolymerization with 2-acrylamido-2-methylpropane sulphonic acid. Both the electrophoretic mobility and the hydrodynamic diameter of the particles were measured as a function of pH and electrolyte concentration. Although a weak charge was detected by titration, no trend was observed for the size or mobility against pH variations. In order to apply Ohshima's electrophoretic theories for soft particles to fit the mobility data, the swelling behaviour of the particles was taken into account.
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页码：180 / 183
页数：4
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