Formation of micelle-decorated colloidal silica by adsorption of nonionic surfactant

被引：79

作者：

Despert, G ^{[1
]}

Oberdisse, J ^{[1
]}

机构：

[1] CEA Saclay, Leon Brillouin Lab, CEA, CNRS, F-91191 Gif Sur Yvette, France

来源：

LANGMUIR | 2003年 / 19卷 / 18期

关键词：

D O I：

10.1021/la0300939

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The structure of the adsorbed layer of a nonionic surfactant on small colloidal silica beads in water at high pH is revisited. The adsorption isotherm was constructed by centrifugation and subsequent spectroscopic determination of the concentration of nonadsorbed surfactant in the supernatant. The shape of the surfactant-silica complexes was measured by small-angle neutron scattering in dilute solutions. External contrast variation was used to enhance scattering from the silica and the surfactant, respectively. Spectra are analyzed by comparison to results of numerical simulations of micelle-decorated silica beads. Very good agreement between experimental data and simulations is found.

引用

页码：7604 / 7610

页数：7

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