Dynamic light scattering studies of poly(ethylene oxide) adsorbed on laponite: Layer conformation and its effect on particle stability

被引：89

作者：

Nelson, A ^{[1
]}

Cosgrove, T ^{[1
]}

机构：

[1] Univ Bristol, Bristol BS8 1TS, Avon, England

来源：

LANGMUIR | 2004年 / 20卷 / 24期

关键词：

D O I：

10.1021/la049323p

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Dynamic light scattering has been used to determine the hydrodynamic thickness of poly(ethylene oxide) (PEO) adsorbed on synthetic anisotropic clay particles (Laponite) as a function of molecular weight. The layer thicknesses, and their increase with molecular weight, indicate that the conformation of the adsorbed layer is very compact and is much smaller than those normally observed for polymer adsorption on flat interfaces. The aggregation kinetics of the polymer coated particles in 5 mM NaCl was analyzed in a quantitative manner, revealing that the potential barrier to aggregation is strongly enhanced when polymer is present.

引用

页码：10382 / 10388

页数：7

共 31 条

[1] COLLOIDAL PROPERTIES OF SYNTHETIC HECTORITE CLAY DISPERSIONS .2. LIGHT AND SMALL-ANGLE NEUTRON-SCATTERING [J].