화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.18, No.5, 580-585, September, 2001
DOI10.1007/BF02706371  Export Citation
Rheological Properties and Stability of Magnetorheological Fluids using Viscoelastic Medium and Nanoadditives
Jong Hyeok Park, Moo Hyun Kwon1, and O Ok Park†
  • Center for Advanced Functional Polymer (CAFPoly), Department of Chemical Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusong-dong, Yusong-gu, Daejeon 305-701, Korea
  • 1Department of Chemical Engineering, Woosuk University, 490 Hujung-ri, Samrae-eup, Wanju-gun, Jeonbuk 565-701, Korea
E-mail:
In order to improve the stability of magnetorheological (MR) fluids, viscoelastic medium having 2.2 Pa yield stress has been used as a continuous phase and nanosized CrO2 particles are added too. The rheological properties as well as the dispersion stability of MR fluids have been studied by using a stress-controlled rheometer and sedimentation test. The steady-shear MR response was independent of the continuous and nano additives and the fieldinduced yield stress increased subquadratically with the flux density. Since the constant stress is generated within the limit of zero shear rate, the plateau in the flow curve corresponds to the Bingham yield stress. Under an external field, the yield stress varied as B(3/2). The yield stress has an approximately linear relation with the particle volume fraction.
Keywords:Magnetorheology;Yield Stress;Dispersion Stability;Carbonyl Iron;Viscoelastic Medium
  1. Chhabra RP, "Bubbles, Drops, and Particles in Non-Newtonian Fluids," CRC Press Boca Raton (1993)
  2. Chin BD, Lee YS, Park OO, J. Colloid Interface Sci., 201(2), 172 (1998) 
  3. Chin BD, Park OO, J. Rheol., 44(2), 397 (2000) 
  4. Chin BD, Park OO, Korean J. Chem. Eng., 18(1), 54 (2001)
  5. Chin BD, Park JH, Kwon MH, Park OO, Rheol. Acta, 40(3), 211 (2001) 
  6. Ginder JM, in Encyclopedia of Applied Physics, vol. 16, edited by E. Immergut, VCH, New York, 487 (1996)
  7. Ginder JM, Davis LC, Elie LD, Int. J. Mod. Phys. B, 10(23-24), 3293 (1996) 
  8. Jordan TC, Shaw MT, Mcleish TCB, J. Rheol., 36(3), 441 (1992) 
  9. Kim YD, Klingenberg DJ, Korean J. Chem. Eng., 14(1), 23 (1997)
  10. Kormann C, Laun HM, Richter HJ, Int. J. Mod. Phys. B, 10(23-24), 3167 (1996) 
  11. Lee HJ, Chin BD, Yang SM, Park OO, J. Colloid Interface Sci., 206(2), 424 (1998) 
  12. Margida AJ, Weiss KD, Carlson JD, Int. J. Mol. Phys. B, 10(23-24), 3335 (1996)
  13. Nakano M, Yamamoto H, Jolly MR, Proc of 6(th) International Conference on ERF, Magneto-rheological Suspensions and Their Applications, World Scientific, Singapore, 551 (1998)
  14. Phule PP, MRS Bull., 23, 23 (1998)
  15. Phule PP, Ginder JM, Int. J. Mod. Phys. B, 13, 2019 (1999) 
  16. Rankin PJ, Horvath AT, Klingenberg DJ, Rheol. Acta, 38(5), 471 (1999)