Concentration dependence of the low-shear viscosity of suspensions of hard-sphere colloids

被引:100
作者
Meeker, SP
Poon, WCK
Pusey, PN
机构
[1] Department of Physics and Astronomy, The University of Edinburgh, Edinburgh, EH9 3JZ, Mayfield Road
来源
PHYSICAL REVIEW E | 1997年 / 55卷 / 05期
关键词
D O I
10.1103/PhysRevE.55.5718
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
Experimental measurements are presented of the concentration dependence of the low-shear limit viscosity of nearly monodisperse polymethylmethacrylate spheres dispersed in cis-decalin, a system that models a suspension of hard spheres. The suspension volume fractions are calibrated with reference to the volume fraction at which the particles undergo the thermodynamic freezing transition to a colloidal crystal, providing accurate estimates of the volume fractions of concentrated suspensions. At the freezing volume fraction (phi(f) approximate to 0.50) we find the relative low-shear viscosity eta(r)(0) (low-shear viscosity normalized by the solvent viscosity) to be 53+/-6, compared with results from previous studies that vary from approximate to 20 to 400.
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页码:5718 / 5722
页数:5
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