Authors: Fei Fei Fang Ying Dan Liu Hyoung Jin Choi
Publish Date: 2013/01/29
Volume: 291, Issue: 7, Pages: 1781-1786
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 Xray 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
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