Viscoelastic model of phase separation in colloidal suspensions and emulsions

Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

Volumn 59, Issue 6, 1999, Pages 6842-6852

  Tanaka, Hajime ^a,b  

^a INSTITUTE OF INDUSTRIAL SCIENCE   (Japan)

^b UNIVERSITY OF CAMBRIDGE   (United Kingdom)

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ARTICLE;

EID: 0000729738     PISSN: 1063651X     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevE.59.6842     Document Type: Article

References (53)

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53. It is worth noting here that shear-induced flocculation can be irreversible. The mechanism of irreversible shear-induced aggregation [see, e.g., J. W. Goodwin and J. D. Mercer-Chalmers, in Modern Aspects of Colloidal Dispersions, edited by R. H. Ottewill and A. R. Rennie (Kluwer, London, 1998), pp. 61–75] is usually discussed in terms of the competition between interparticle interactions and stress applied by the shear fields. According to the Derjaquin-Landau-Verwey-Overbeek (DLVO) theory, a particle interaction from another particle encounters some barrier before it feels strongly attractive. The shear stress helps a particle to pass this barrier especially along the compression axis. Once a particle comes close to another particle passing the barrier, the pair becomes very stable. This apparently leads to irreversible flocculation, when the barrier height (Formula presented). Here we do not discuss such an irreversible flocculation, which is beyond the scope of this paper. Thus we consider only a homogeneous colloidal suspension near its two-phase region.