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Polymeric Composites Tailored by Electric Field

Published online by Cambridge University Press:  03 March 2011

GeunHyung Kim  and
Yuri M. Shkel
GeunHyung Kim
Affiliation:
University of Wisconsin-Madison, Department of Mechanical Engineering and Polymer Engineering Center, 1513 University Ave, Wisconsin 53705
Yuri M. Shkel
Affiliation:
University of Wisconsin-Madison, Department of Mechanical Engineering and Polymer Engineering Center, 1513 University Ave, Wisconsin 53705
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Abstract

A solid composite of desirable microstructure can be produced by curing a liquid polymeric suspension in an electric field. Redistribution effect of the field-induced forces exceeds that of centrifugation, which is frequently employed to manufacture functionally graded materials. Moreover, unlike centrifugational sedimentation, the current approach can electrically rearrange the inclusions in targeted areas. The electric field can be employed to produce a composite having uniformly oriented structure or only modify the material in selected regions. Field-aided technology enables polymeric composites to be locally micro-tailored for a given application. Moreover, materials of literally any composition can be manipulated. In this article we present testing results for compositions of graphite and ceramic particles as well as glass fibers in epoxy. Electrical and rheological interactions of inclusions in a liquid epoxy are discussed. Measurements of tensile modulus and ultimate strength of epoxy composites having different microstructure of 10 vol% graphite, ceramic particles and glass fiber are presented.

Keywords

CompositeMicrostructureElectromigration
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 4 , April 2004 , pp. 1164 - 1174
Copyright
Copyright © Materials Research Society 2004

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