Warren, P., Weitz, D. A. , Nicodemi, Mario, Coffey, William, 1948-, Felderhof, B. U. and Ball, R. C. (2003) Dynamics of weakly aggregated colloidal particles - discussion. Royal Society of London. Philosophical Transactions A. Mathematical, Physical and Engineering Sciences, Vol.361 (No.1805). pp. 764-766. ISSN 1364-503X

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Abstract

We discuss the behaviour of the dynamics of colloidal particles with a weak attractive interparticle interaction that is induced through the addition of polymer to the solvent. We briefly review the description of their behaviour in terms of the jamming phase diagram, which parametrized the fluid–to–solid transition due to changes in volume fraction, attractive energy or applied stress. We focus on a discussion of ageing of the solid gels formed by these colloid–polymer mixtures. They exhibit a delayed collapse induced by gravity. The time evolution of the height of the sediment exhibits an unexpected scaling behaviour, suggesting a universal nature to this delayed collapse. We complement these measurements of the scaling of the collapse with microscopic investigations of the evolution of the structure of the network using confocal microscopy. These results provide new insight into the origin of this ageing behaviour.

Item Type:	Journal Item
Subjects:	Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Colloids, Dynamics, Rheology
Journal or Publication Title:	Royal Society of London. Philosophical Transactions A. Mathematical, Physical and Engineering Sciences
Publisher:	Royal Society Publishing
ISSN:	1364-503X
Date:	15 April 2003
Volume:	Vol.361
Number:	No.1805
Number of Pages:	3
Page Range:	pp. 764-766
Identification Number:	10.1098/rsta.2002.1163
Status:	Peer Reviewed
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/9794

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