Reversible Flocculation of Silica Colloids in Liquid Mixtures

Narayanan, T and Kumar, A and Gopal, ESR and Beysens, D and Guenoun, P and Zalczer, G (1993) Reversible Flocculation of Silica Colloids in Liquid Mixtures. In: Physical Review E, 48 (3). pp. 1989-1984.

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Abstract

We report some observations concerning the reversible flocculation of silica colloids in reentrant liquid mixtures of 3-methylpyridine plus water plus heavy water and 2, 6-lutidine plus water. The research involved a detailed determination of the line of flocculation temperatures for phase-separating as well as non-phase-separating mixtures. The authors find that the flocculation temperature is more influenced by the impurities in the suspension rather than the concentration and size of the spheres. For a fixed volume fraction and diameter of the colloids, they notice a close similarity between the dome of flocculation temperatures and the bulk-coexistence surface but with different amplitudes and exponents in each case.

Item Type:	Journal Article
Publication:	Physical Review E
Publisher:	American Physical Society
Additional Information:	Copyright of this article belongs to The American Physical Society.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	29 Jun 2006
Last Modified:	04 Jan 2013 06:56
URI:	http://eprints.iisc.ac.in/id/eprint/7735

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