Kim, Ji Hye and Fang, Fei Fei and Choi, Hyoung Jin and Seo, Yongsok (2008) Magnetic composites of conducting polyaniline/nano-sized magnetite and their magnetorheology. Materials Letters, 62 (17-18). 2897 - 2899.
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Official URL: http://www.sciencedirect.com/science/article/B6TX9...
Magnetorheological (MR) fluids, composed of colloidal particles dispersed in a carrier liquid, possess controllable rheological properties by an external magnetic field, showing dramatic changes of yield stress and shear viscosity caused by transformation between solid-like to liquid-like state. As a new MR material, we synthesized conducting polyaniline (PANI)/nano-sized Fe3O4 composites which could be adopted as a dispersed phase of MR fluids. Composites containing nano-sized Fe3O4 were synthesized via a chemical reaction method. Microstructure of the PANI/Fe3O4 composites was characterized by SEM and XRD. Magnetic property of the composites was characterized by VSM. Furthermore, MR fluid based on PANI/Fe3O4 composites was investigated using a rotational rheometer equipped with a magnetic field generator, exhibiting a typical MR performance of which shear stress of the fluids increased abruptly under magnetic fields.
|Uncontrolled Keywords:||Composite material; Magnetic material; Magnetorheology; Polyaniline; Magnetite|
|Subjects:||Physical Science > Nanomagnetics|
Material Science > Nanostructured materials
|Deposited On:||10 Feb 2010 12:18|
|Last Modified:||10 Feb 2010 12:18|
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