Piezoresistivity of magnetorheological elastomers
- 1 May 2008
- journal article
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 20 (20), 204136
- https://doi.org/10.1088/0953-8984/20/20/204136
Abstract
Magnetorheological elastomers are smart materials made by aligning magnetic microparticles inside a liquid polymer before the curing process has started. Once cured, the composite presents new properties such as a large change of elasticity when applying a magnetic field. We analyze here another specific property of these materials which is the piezoresistivity. Two cases are studied: one where the particles inside the matrix are not in contact and the other where they are in contact. We show that in the first case we observe an exponential dependence of the resistivity versus pressure and in the second case a power law dependence. These behaviors are explained with the help of a conductivity model based on the dependence of the tunnel effect on the area of contact.This publication has 11 references indexed in Scilit:
- Electrical and mechanical properties of a metal-filled polymer composite for interconnection and testing applicationsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Piezoresistance of conductor filled insulator compositesPolymer International, 2001
- Conduction mechanisms in some graphite–polymer composites: Effects of temperature and hydrostatic pressureJournal of Applied Physics, 1998
- A model of the behaviour of magnetorheological materialsSmart Materials and Structures, 1996
- Piezoresistivity in Polymer‐Ceramic CompositesJournal of the American Ceramic Society, 1990
- Piezoresistivity of heterogeneous solidsJournal of Applied Physics, 1987
- Resistivity of a composite conducting polymer as a function of temperature, pressure, and environment: Applications as a pressure and gas concentration transducerJournal of Applied Physics, 1986
- Electric ContactsPublished by Springer Science and Business Media LLC ,1967
- Generalized Formula for the Electric Tunnel Effect between Similar Electrodes Separated by a Thin Insulating FilmJournal of Applied Physics, 1963
- The Electric Tunnel Effect across Thin Insulator Films in ContactsJournal of Applied Physics, 1951