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Effect of surface treatment on magnetorheological characteristics of core-shell structured soft magnetic carbonyl iron particles

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Abstract

Core-shell structured soft magnetic carbonyl iron (CI) particles coated with poly(glycidyl methacrylate) were fabricated using a dispersion polymerization method. The surface of the CI particles was pretreated with 4-aminobenzoic acid to enhance the affinity between CI and poly(glycidyl methacrylate) (PGMA). The synthesized CI/PGMA core-shell particles were characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, and vibrating sample magnetometry. The CI/PGMA particles were dispersed into a non-magnetic liquid for applications as a magnetorheological (MR) fluid, in which the rheological properties can be altered significantly by an external magnetic field. The MR suspension was analyzed using a rotational rheometer at various magnetic field strengths. Although the fabricated CI particles exhibited lower MR properties than pure CI particles, they showed improved dispersion stability according to the Turbiscan apparatus.

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Acknowledgments

One of the authors (C. H. Hong) appreciates the financial support from Inha University, South Korea.

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Authors and Affiliations

  1. Department of Polymer Science and Engineering, Inha University, Incheon, 402-751, Republic of Korea

    Woo Jin Ahn, Hyo Seung Jung, Seung Hyuk Kwon, Cheng Hai Hong & Hyoung Jin Choi

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  1. Woo Jin Ahn
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  2. Hyo Seung Jung
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  3. Seung Hyuk Kwon
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  4. Cheng Hai Hong
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  5. Hyoung Jin Choi
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Correspondence to Cheng Hai Hong or Hyoung Jin Choi.

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Ahn, W.J., Jung, H.S., Kwon, S.H. et al. Effect of surface treatment on magnetorheological characteristics of core-shell structured soft magnetic carbonyl iron particles. Colloid Polym Sci 293, 2647–2654 (2015). https://doi.org/10.1007/s00396-015-3669-6

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  • DOI: https://doi.org/10.1007/s00396-015-3669-6

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