The polymer and salt induced aggregation of silica particles

被引：21

作者：

Tavacoli, J. W.

Dowding, P. J.

Routh, A. F.

机构：

[1] Univ Sheffield, Dept Chem & Proc Engn, Sheffield S1 3JD, S Yorkshire, England

[2] Infineum UK Ltd, Abingdon OX13 6BB, Oxon, England

[3] Univ Cambridge, Dept Chem Engn, BP Inst, Cambridge CB3 0EZ, England

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2007年 / 293卷 / 1-3期

基金：

英国工程与自然科学研究理事会;

关键词：

aggregation; DLVO; silica particles;

D O I：

10.1016/j.colsurfa.2006.07.025

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：

Dynamic light scattering (DLS) was used to map the stability of an aqueous silica colloid in the presence of differing concentrations of sodium polystyrene sulphonate (PSS) and sodium chloride (NaCl). Additionally, values of PSS size with salt and PSS osmotic pressure were measured as a function of PSS concentration. Six theoretical maps based on DLVO and simple depletion theory were then constructed as a comparison to the experimental map using the measured values as well as two theoretical values of PSS size and osmotic pressure. It was found that DLVO overestimates the effect of salt screening and of the various comparisons those calculated using size and osmotic pressure derived from a PSS chain with 1 charge between 5 monomers showed the greatest similarities to the experimental work. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：167 / 174

页数：8

共 38 条

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