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Interpartical Attractions and the Mechanical Properties of Colloidal Gels

Published online by Cambridge University Press:  25 February 2011

C. J. Rueb  and
C. F. Zukoski
C. J. Rueb
Affiliation:
Department of Chemical Engineering, University of Illinois, Urbana, Illinois 61801
C. F. Zukoski
Affiliation:
Department of Chemical Engineering, University of Illinois, Urbana, Illinois 61801
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Abstract

The influence of the strength of interparticle attractions on the mechanical properties of colloidal gels is explored. As attractions increase, suspensions gel. At the gel point the zero shear rate viscosity diverges while the low frequency modulus becomes measurable. In addition at the gel point, storage and loss moduli were of the same order and displayed power law sealing on oscillation frequency. With much stronger attractions, the critical strain required to rupture the gel scales in a power law manner or elastic modulus. These observations are discussed in terns of recently developed models of gel fonnation and dynamics.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 249: Symposium Q – Synthesis and Processing of Ceramics: Scientific Issues , 1991 , 279
Copyright
Copyright © Materials Research Society 1992

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References

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