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Two-layer coating with polymer and carbon nanotube on magnetic carbonyl iron particle and its magnetorheology

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Abstract

Magnetic carbonyl iron (CI)-based magnetorheological (MR) fluids generally posses serious dispersion defects due to the large density mismatch between the CI particles and continuous oil medium, which restricts further MR applications. Polymer coating technology has been introduced in an attempt to reduce the density or prevent CI particle aggregation. In this study, a unique functional coating composed of a polyaniline layer and multiwalled carbon nanotube nest was fabricated on the surface of CI particles using a dispersion polymerization and solvent casting method to improve the sedimentation problem of CI-based MR fluids when dispersed in medium oil. The coating morphology was analyzed by scanning electron microscopy. The effect of the functional coating on the MR performance along with the sedimentation observations was investigated using a rotational rheometer. The results showed that the sedimentation of dispersed particles was improved considerably by the reduced density and rough morphology.

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References

  1. Bica I (2009) Mater Lett 63:2230

    Article  CAS  Google Scholar 

  2. Kim JH, Fang FF, Choi HJ, Seo Y (2008) Mater Lett 62:2897

    Article  CAS  Google Scholar 

  3. Li WH, Lynam C, Chen J, Liu B, Zhang XZ, Wallace GG (2007) Mater Lett 60:3116

    Article  Google Scholar 

  4. Ekwebelam CC, See H (2007) Korea-Australia Rheol J 19:35

    Google Scholar 

  5. Pu HT, Jiang FJ, Yang ZL (2006) Mater Lett 60:94

    Article  CAS  Google Scholar 

  6. Li WH, Zhang XZ (2008) Korea-Australia Rheol J 20:45

    CAS  Google Scholar 

  7. Choi HJ, Jhon MS (2009) Soft Matter 5:1562

    Article  CAS  Google Scholar 

  8. Yin J, Zhao X, Xia X, Xiang L, Qiao Y (2008) Polymer 49:4413

    Article  CAS  Google Scholar 

  9. Fang FF, Kim JH, Choi HJ, Kim CA (2009) Colloid Polym Sci 287:745

    Article  CAS  Google Scholar 

  10. Cheng YC, Guo JJ, Xu GJ, Cui P, Liu XH, Liu FH, Wu JH (2008) Colloid Polym Sci 286:1493

    Article  CAS  Google Scholar 

  11. Hong CH, Sung JH, Choi HJ (2009) Colloid Polym Sci 287:583

    Article  CAS  Google Scholar 

  12. Bica I, Choi HJ (2008) Int J Mod Phys B 22:5041

    Article  CAS  Google Scholar 

  13. See H, Joung C, Ekwebelam C (2007) Int J Mod Phys B 21:4945

    Article  CAS  Google Scholar 

  14. Jang IB, Kim HB, Lee JY, You JL, Choi HJ, Jhon MS (2005) J Appl Phys 97:10Q912

    Article  Google Scholar 

  15. de Vicente J, López-López MT, Durán JDG, González-Caballero F (2004) Rheol Acta 44:94

    Article  CAS  Google Scholar 

  16. Lim ST, Cho MS, Jang IB, Choi HJ, Jhon MS (2004) IEEE Trans Magn 40:3033

    Article  CAS  Google Scholar 

  17. Lim ST, Choi HJ, Jhon MS (2005) IEEE Trans Magn 41:3745

    Article  CAS  Google Scholar 

  18. Fang FF, Jang IB, Choi HJ (2007) Diamond Relat Mater 16:1167

    Article  CAS  Google Scholar 

  19. Cho MS, Lim ST, Jang IB, Choi HJ, Jhon MS (2004) IEEE Trans Magn 40:3036

    Article  CAS  Google Scholar 

  20. Wu WP, Zhao BY, Wu Q, Chen LS, Hu KA (2006) Smart Mater Struct 15:N94

    Article  Google Scholar 

  21. Fang FF, Choi HJ (2008) J Appl Phys 103:07A301

    Article  Google Scholar 

  22. Larson RG (1999) The structure and rheology of complex fluids, Chap. 7. Oxford University Press, New York

    Google Scholar 

  23. Wollny K, Läuger J, Huck S (2002) Appl Rheol 12:25

    Google Scholar 

  24. Gu R, Gong X, Jiang W, Hao L, Xuan S, Zhang Z (2008) J Magn Magn Mater 320:2788

    Article  CAS  Google Scholar 

  25. Ginder JM, Davis LC, Elie LD (1996) Int J Mod Phys B 10:3293

    Article  CAS  Google Scholar 

  26. Choi HJ, Cho MS, Kim JW, Kim CA, Jhon MS (2001) Appl Phys Lett 78:3806

    Article  CAS  Google Scholar 

  27. Fang FF, Choi HJ, Jhon MS (2009) Colloids Surf A: Physicochemical Eng Asp 351:46

    Article  CAS  Google Scholar 

Download references

Acknowledgment

The authors wish to acknowledge to Mr. Hwang Sun Jae for his valuable assistance with the transmission electron microscopy (TEM) investigations. This work was supported by ETRI (2009).

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Authors and Affiliations

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

    Fei Fei Fang & Hyoung Jin Choi

  2. School of Display Engineering, Hoseo University, Chungnam, 336-795, South Korea

    W. S. Choi

Authors
  1. Fei Fei Fang
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  2. Hyoung Jin Choi
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  3. W. S. Choi
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Correspondence to Hyoung Jin Choi.

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Fang, F.F., Choi, H.J. & Choi, W.S. Two-layer coating with polymer and carbon nanotube on magnetic carbonyl iron particle and its magnetorheology. Colloid Polym Sci 288, 359–363 (2010). https://doi.org/10.1007/s00396-009-2164-3

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  • DOI: https://doi.org/10.1007/s00396-009-2164-3

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