Nano Archive

Magnetic composites of conducting polyaniline/nano-sized magnetite and their magnetorheology

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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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.

Item Type:Article
Uncontrolled Keywords:Composite material; Magnetic material; Magnetorheology; Polyaniline; Magnetite
Subjects:Physical Science > Nanomagnetics
Material Science > Nanostructured materials
ID Code:6638
Deposited By:SPI
Deposited On:10 Feb 2010 12:18
Last Modified:10 Feb 2010 12:18

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