화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.26, No.4, 353-358, April, 2018
DOI10.1007/s13233-018-6048-5  Export Citation
Magnetite Embedded Mini-Emulsion Polymerized Polystyrene Particles and Their Magnetorheology
Min Wook Kim, Dong Hun Bae, Seung Hyuk Kwon, and Hyoung Jin Choi†
  • Department of Polymer Science and Engineering, Inha University, Incheon 22212, Korea
E-mail:
Novel Fe3O4-encapsulated polystyrene (PS) hybrid particles were synthesized by a new preparation route involving mini-emulsion polymerization. A ferrofluid of oleic acid-coated Fe3O4 in octane was obtained initially, and then emulsified by an ultra-sonication process with sodium dodecyl sulfate as a surfactant. The suspension composed of the obtained Fe3O4 clusters was mixed with a styrene monomer, and the resulting Fe3O4 clusters served as templates for mini-emulsion polymerization. The embedded structure and uniform size of the fabricated Fe3O4/PS particles were examined by transmission electron microscopy, while their thermal properties, chemical structure, and magnetic properties were confirmed by thermogravimetric analysis, Fourier transform infrared spectroscopy, and vibrating sample magnetometry, respectively. The magnetorheological (MR) characteristics of the resulting particles dispersed in silicone oil were tested using a rotational rheometer. The fluid composed of Fe3O4/PS particles exhibited typical MR fluid behavior under applied magnetic fields.
Keywords:magnetorheological fluid;magnetite;polystyrene;composite
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