Colloidal Particles in Competition for Stabilizer: A Solvent Relaxation NMR Study of Polymer Adsorption and Desorption

被引：28

作者：

Cooper, Catherine L. ^{[1
]}

Cosgrove, Terence ^{[1
]}

van Duijneveldt, Jeroen S. ^{[1
]}

Murray, Martin ^{[2
]}

Prescott, Stuart W. ^{[1
]}

机构：

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

[2] AkzoNobel, Slough SL2 5DS, Berks, England

来源：

LANGMUIR | 2012年 / 28卷 / 48期

基金：

英国工程与自然科学研究理事会;

关键词：

NUCLEAR MAGNETIC-RESONANCE; SOLID-LIQUID INTERFACE; POLY(ETHYLENE OXIDE); POLYVINYL PYRROLIDONE); POLY(VINYL PYRROLIDONE); MOLECULAR WEIGHT; SILICA; NANOPARTICLES; DISPLACEMENT; SURFACE;

D O I：

10.1021/la303864h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The competitive adsorption of poly(vinylpyrrolidone) onto silica and alumina-modified silica particles was studied using solvent relaxation nuclear magnetic resonance. The additive nature of the measured relaxation rate enabled predictions to be made of the relaxation rate in different polymer adsorption scenarios. Preferential adsorption of the poly(vinylpyrrolidone) onto the unmodified silica particles occurred when there was insufficient polymer in the system to coat the entire available surface area. Desorption was also found to occur when the polymer was initially adsorbed upon the alumina-modified particle and silica particles were added.

引用

页码：16588 / 16595

页数：8

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