Abstract
Magnetic nanoparticles of magnetite (Fe3O4) were synthesized within a conducting polypyrrole (PPY) matrix using a facile method, and employed as both electrorheological (ER) and magnetorheological (MR) materials to provide a well dispersed suspension of either ER or MR fluids. The PPY to Fe3O4 weight ratio was adjusted to 5 % to avoid possible deterioration of the magnetic properties of the Fe3O4 particles. Transmission electron microscopy and X-ray diffraction provided information on the structure and particle size of the PPY/Fe3O4. Both ER and MR performance of pure Fe3O4 and PPY/Fe3O4 nanocomposites were examined through rotational and oscillatory tests using a rotational rheometer under an applied electric and magnetic field, respectively, demonstrating typical ER and MR characteristics.
Published Version
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