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Energy conversion in magneto-rheological elastomers.

Gael Sebald1, Masami Nakano1,2, Mickaël Lallart3

  • 1ELyTMaX UMI 3757, CNRS, Université de Lyon, Tohoku University, International Joint Unit, Tohoku University, Sendai, Japan.

Science and Technology of Advanced Materials
|November 21, 2017
PubMed
Summary
This summary is machine-generated.

Magneto-rheological elastomers exhibit an inverse pseudo-Villari effect, where mechanical strain alters magnetic properties. This discovery in silicone-based materials opens new avenues for sensing and energy harvesting applications.

Keywords:
10 Engineering and Structural materials206 Energy conversion / transport / storage / recovery208 Sensors and actuatorsMagneto-rheologycompositeenergy harvestingmagneto-elastic

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Area of Science:

  • Materials Science
  • Magnetism
  • Polymer Science

Background:

  • Magneto-rheological (MR) elastomers display the MR effect, where rheological properties change with magnetic fields.
  • This study investigates the converse phenomenon: the pseudo-Villari effect, where magnetic properties depend on mechanical strain.

Purpose of the Study:

  • To experimentally quantify the pseudo-Villari effect in MR elastomers.
  • To explore the potential of this effect for energy harvesting and sensing applications.

Main Methods:

  • Fabrication of MR elastomers using silicone rubber matrices and carbonyl iron particles.
  • Experimental characterization of the pseudo-Villari effect under shear strain and applied magnetic fields.

Main Results:

  • A shear strain of 50% induced magnetic induction variations up to 10 mT in anisotropic MR elastomers under a 0.2 T field.
  • The pseudo-Villari effect was found to be independent of the elastomer matrix stiffness.
  • Potential energy conversion density in the mJ cm-3 order of magnitude was theoretically estimated.

Conclusions:

  • The pseudo-Villari effect is a significant inverse phenomenon in MR elastomers.
  • The independence of this effect from matrix stiffness enhances material adaptability for sensing and energy harvesting.
  • MR elastomers show promise for novel energy conversion devices.