Poly(methyl methacrylate)‐coated carbonyl iron particles and their magnetorheological characteristics |
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| Authors: | Wanquan Jiang Hong Zhu Chaoyang Guo Jianfeng Li Qun Xue Jianghua Feng Xinglong Gong |
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| Affiliation: | 1. CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, PR China;2. Department of Chemistry, University of Science and Technology of China, Hefei 230026, PR China;3. Zhuzhou Electric Locomotive Research Institute, Zhuzhou 412001, China |
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| Abstract: | Magnetorheological fluids (MRFs) are types of suspensions that contain magnetic particles and a carrier fluid, and are considered as semi‐active smart materials. By tuning the strength of an external magnetic field, like other traditional MRFs, a carbonyl iron (CI)–poly(methyl methacrylate) (PMMA) particle‐based MRF can change reversibly from a fluid‐like state to a solid‐like state within milliseconds. In the research reported, CI particles were encapsulated with PMMA via emulsion polymerization. After the polymerization, the fabricated CI–PMMA composite particles were dispersed in a suspension medium to prepare MRF. The synthesized CI–PMMA composite particle‐based MRF showed a shear stress of 60 kPa at the magnetic field strength of 0.6 T, and a greatly enhanced anti‐sedimentation stability. Copyright © 2010 Society of Chemical Industry |
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| Keywords: | magnetorheological fluid (MRF) CI– PMMA composite particles anti‐sedimentation property magnetorheological effect |
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