Phase transitions at interfaces: Flocculation of charge stabilised colloids in liquid mixtures
✍ Scribed by A. Kumar; D. Beysens
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 345 KB
- Volume
- 224
- Category
- Article
- ISSN
- 0378-4371
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✦ Synopsis
An intriguing phenomenon of reversible flocculation of charge-stabilised colloids in liquid mixtures is described. Some recent results conceming the shape of the flocculation surface, especially near special critical points (e.g. a double critical point, DCP), are also discussed. The findings regarding the kinetics of aggregation/fragmentation have been reviewed. The theoretical efforts behind the mechanism of this phenomenon (e.g. prewetting, capillary condensation, adsorptiondriven secondary minimum in the interparticle DLVO potential, Casimir forces, etc.) are outlined. The role of special critical points (e.g. a DCP or a quadruple critical point, QCP) in elucidating several key features of the above phenomenon is underlined. Several challenging problems in this emerging area that demand attention, are pointed out.