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Conductive elastomeric composites

Peace, M. H. K. and Mitchell, G. R. (2009) Conductive elastomeric composites. Journal of Physics: Conference Series, 183. 012011. ISSN 1742-6588

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To link to this article DOI: 10.1088/1742-6596/183/1/012011

Abstract/Summary

Conductive elastic materials are formed by distributing conductive particles within an elastic polymer. We consider a novel composite based on dendritic nickel particles that exhibit remarkably strong negative piezoresistivity with an increase in conductivity of up to 10 orders of magnitude with strains of the order of 0.2. A vital factor for the conductivity of conductive elastomers is the concentration of conductive fillers and many aspects can be understood in terms of percolation theory. In this system the concentration of particles within the composite does not change with strain, yet due to the shape of the particles, the concentration of electrical contacts between the particles does change. We have developed a new model based on the concentration of contact sites, rather than particles which enables us to successfully model this remarkable strain-dependence of conductivity.

Item Type:Article
Refereed:Yes
Divisions:Interdisciplinary centres and themes > Nanoscience and Materials
Faculty of Science > School of Mathematical and Physical Sciences
ID Code:1641
Publisher:Institute of Physics

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