Fe3O4 nanoparticle-embedded polystyrene composite particles fabricated via a Shirasu porous glass membrane technique and their magnetorheology

Publication date: 8 September 2017
Source:Polymer, Volume 125
Author(s): Chun Yan Gao, Min Wook Kim, Dong Hun Bae, Yu Zhen Dong, Shang Hao Piao, Hyoung Jin Choi
We synthesized Fe3O4/polystyrene (PS) composite nanoparticles via a Shirasu porous glass (SPG) membrane emulsification technique and examined their magnetorheological (MR) properties under external magnetic field strengths. The SPG method was adopted for achieving a narrow size distribution of the product nanoparticles containing magnetite. The structure and morphology of the samples were analyzed by transmission electron microscopy and their thermal characteristics were evaluated by thermogravimetric analysis. The MR behavior of a Fe3O4/PS composite-based MR fluid dispersed in silicone oil was examined by a rotational rheometer under an extra magnetic field strength. The experimental results obtained from both the steady shear and dynamic oscillation tests showed that the fluid exhibited a typical MR behavior under an applied magnetic field.

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