화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.79, 217-225, November, 2019
DOI10.1016/j.jiec.2019.06.040  Export Citation
Facile synthesis of hierarchically structured flower-like Fe3O4 microspheres for high-performance magnetorheological fluids
Guangshuo Wang1, †, Dexing Zhao1, Nannan Li2, Yingzhe Zeng1, Shuai Han1, Yingying Ma1, †, Xufeng Dong2, and Ruitao Yu3, 4, †
  • 1School of Materials Science and Engineering, Hebei University of Engineering, Handan, 056038, China
  • 2School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China
  • 3Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, China
  • 4Qinghai Key Laboratory of Tibetan Medicine, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, China
E-mail:, ,
In this study, flower-like Fe3O4 microspheres with hierarchical structure were prepared by a one step solvothermal method, and the obtained flower-like Fe3O4 microspheres were adopted as a new magnetorheological (MR) material to prepare a uniform MR suspension with high performances. The synthesized samples were systematically examined using FE-SEM, TEM, TGA, XRD, XPS, BET and VSM. The prepared flower-like Fe3O4 microspheres-based MR fluid indicated typical MR properties, as evidenced by the fact that shear stress, yield stress, viscoelastic storage modulus and loss modulus of MR fluid strongly depended on magnetic field strengths. Specifically, the resultant MR fluid showed good sedimentation stability with sedimentation ratio of 86.5% in the settling period. The excellent sedimentation stability could be attributed to the unique flower-like hierarchical structure, high specific surface area and the reduced particle-fluid density mismatch.
Keywords:Flower-like Fe3O4;Hierarchical structure;Solvothermal method;Magnetorheological fluid;Sedimentation stability
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