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Aging Effects in Suspensions of Silica Particles

Published online by Cambridge University Press:  01 February 2011

Seila Selimovic  and
Yue Hu
Seila Selimovic
Affiliation:
Department of Physics, Wellesley College, 106 Central Street, Wellesley, MA 02481–8203, U.S.A.
Yue Hu
Affiliation:
Department of Physics, Wellesley College, 106 Central Street, Wellesley, MA 02481–8203, U.S.A.
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Abstract

In our study of the aging phenomena in silica suspensions we immersed precipitated silica particles in methyl-terminated PDMS (silicone oil), mineral oil, and glycerol/water and measured their viscoelastic properties as a function of time. We found that the samples based on silicone oil, initially of a pasty consistence, became fluid-like after a period of about three weeks. Aqueous samples aged much faster than the oily samples. Samples containing mineral oil did not exhibit any changes in viscosity and elasticity. In this paper we discuss a possible mechanism for these aging behaviors.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 790: Symposium P – Dynamics in Small Confining Systems–2003 , 2003 , P7.11
Copyright
Copyright © Materials Research Society 2004

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References

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