Enhanced magnetorheology of soft magnetic carbonyl iron suspension with hard magnetic γ-Fe2O3 nanoparticle additive

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• 作者：Dae Sung Jang ; Ying Dan Liu ; Jung Hyun Kim ; Hyoung Jin Choi
• 关键词：Magnetorheological fluid ; Carbonyl iron ; Iron oxide ; Additive ; Suspension
• 刊名：Colloid & Polymer Science
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：293
• 期：2
• 页码：641-647
• 全文大小：968 KB
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• 作者单位：Dae Sung Jang (1)
  Ying Dan Liu (1) (2)
  Jung Hyun Kim (1)
  Hyoung Jin Choi (1)
  
  1. Department of Polymer Science and Engineering, Inha University, Incheon, 402-751, South Korea
  2. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, People’s Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Polymer Sciences
  Physical Chemistry
  Soft Matter and Complex Fluids
  Characterization and Evaluation Materials
  Food Science
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1435-1536

文摘

Rod-like hard-magnetic nanoparticles of γ-Fe2O3 were used as an additive to a soft magnetic carbonyl iron (CI) microsphere-based magnetorheological (MR) suspension to improve the dispersion stability of the MR fluid and enhance its MR performance. The morphology of the pure CI microspheres and CI/γ-Fe2O3 mixture particles were examined by scanning electron microscopy. The MR properties of pure CI and CI/γ-Fe2O3 mixtures were measured from steady and oscillatory tests under different magnetic field strengths. The results showed that the CI/γ-Fe2O3 MR fluid exhibited higher yield behaviors with an enhanced MR effect than that of the pure CI MR fluid due to the increased magnetic properties. Physically attached γ-Fe2O3 nanoparticles onto the surface of micron-sized CI particles improved not only MR performance but also dispersion stability of the MR particles.