Shear yield stress of partially flocculated colloidal suspensions

被引:178
|
作者
Scales, PJ [1 ]
Johnson, SB
Healy, TW
Kapur, PC
机构
[1] Univ Melbourne, Sch Chem, Adv Mineral Prod Special Res Ctr, Parkville, Vic 3052, Australia
[2] Tata Res Dev & Design Ctr, Pune 411013, Maharashtra, India
关键词
D O I
10.1002/aic.690440305
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
A general expression was derived for the shear yield stress of a flocculated suspension of particles that is able to describe the effect of particle-size distribution, solid loading, pH, and hence, electrokinetics of the suspension. The model builds on an earlier model by incorporating the effect of the repulsive interaction between particles. Scaling of the data to the maximum yield stress at a given volume fraction provides a means of removing particle-size- and volume-fraction-related effects. The scaling process establishes that to a high level of precision, concentrated dispersions act, in interparticle interaction terms, as the sum of two-body interactions.
引用
收藏
页码:538 / 544
页数:7
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