The Effects of Particle Conductivity on the Electrorheological Properties of Functionalized MCNT-Coated Doublet-Shaped Anisotropic Microspheres

Jun-Ki Hwang; Kyomin Shin; Hyung-Seok Lim; Jun-Cheol Cho; Jin-Woong Kim; Kyung-Do Suh

Macromolecular Research, Vol.20, No.4, 391-396, April, 2012

DOI10.1007/s13233-012-0035-0 Export Citation

The Effects of Particle Conductivity on the Electrorheological Properties of Functionalized MCNT-Coated Doublet-Shaped Anisotropic Microspheres

Jun-Ki Hwang, Kyomin Shin, Hyung-Seok Lim, Jun-Cheol Cho, Jin-Woong Kim^{1, †}, and Kyung-Do Suh^†

Division of Chemical Engineering, College of Engineering, Hanyang University, Seoul, 133-791, Korea
¹Department of Applied Chemistry, Hanyang University, Gyeonggi, 426-791, Korea

E-mail:,

This study describes the effect of conductivity on the electrorheological (ER) behavior of anisotropic particle suspensions. Anisotropic microparticles were prepared by two-step seeded polymerization. To control the particle conductivity, functionalized multi-wall carbon nanotubes were coated on the particle surface via a layer-bylayer (LBL) method. Particle conductivity increased with layer numbers and the yield stress of the fluids increased with increasing electric field strength. However, the yield stress decreased when suspended particle conductivity increased. Although high conductivity allowed high particle polarization ability, field-induced ER fluid viscoelastic properties decreased.

Keywords:electrorheological fluids;conductivity;anisotropic particles.

[References]

Block H, Kelly JP, J. Phys. D: Appl. Phys., 21, 1661 (1998)
Block H, Kelly JP, Qin A, Watson T, Langmuir., 6, 6 (1990)
Parthasarathy M, Klingenberg DJ, Mater. Sci. Eng., R17, 57 (1996)
Tian Y, Meng YG, Wen SZ, J. Appl. Phys., 90, 493 (2001)
Asano K, Suto H, Yatsuzuka K, J. Electrostat., 40, 573 (1997)
Duan X, Luo W, Chen H, He Y, J. Intell. Mater. Syst.Struct., 11, 43 (2000)
Kanu RC, Shaw MT, J. Rheol., 42(3), 657 (1998)
Shih YH, Conrad H, Int. J. Mod. Phys. B., 8, 2835 (1994)
Tan ZJ, Zou XW, Zhang WB, Jin ZZ, Phys. Rev.E., 59, 3177 (1999)
Jun JB, Uhm SY, Cho SH, Suh KD, Langmuir, 20(6), 2429 (2004)
Block H, Kelly JP, Qin A, Watson T, Langmuir., 6, 6 (1990)
Negita K, Ohsawa Y, J. Phys. II France., 5, 883 (1995)
Gow CJ, Zukoski CF, J. Colloid Interface Sci., 136, 175 (1990)
KhusidV B, Acrivos A, Phys. Rev. E., 52, 1669 (1995)
Wu CW, Conrad H, J. Phys. D: Appl. Phys., 31, 3403 (1998)
Atten P, Boissy C, Foulc JN, J. Electrostat., 40-41, 3 (1997)
Hao T, Kawai A, Ikazaki F, Langmuir, 14(5), 1256 (1998)
Shin K, Lee S, Kim JJ, Suh KD, Macromol. Rapid Commun., 31(22), 1987 (2010)
Davis LC, J. Appl. Phys., 72, 1334 (1992)
Liu YD, Fang FF, Choi HJ, Langmuir, 26(15), 12849 (2010)
Choi HJ, Cho MS, Jhon MS, J. Mod. Phys. B., 13, 1901 (1999)
Aizawa R, Vieira SL, Nakano M, Asaku Y, J. Mod.Phys. B., 15, 1070 (2001)

[Referenced By]

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[1] Block H, Kelly JP, J. Phys. D: Appl. Phys., 21, 1661 (1998)

[2] Block H, Kelly JP, Qin A, Watson T, Langmuir., 6, 6 (1990)

[3] Parthasarathy M, Klingenberg DJ, Mater. Sci. Eng., R17, 57 (1996)

[4] Tian Y, Meng YG, Wen SZ, J. Appl. Phys., 90, 493 (2001)

[5] Asano K, Suto H, Yatsuzuka K, J. Electrostat., 40, 573 (1997)

[6] Duan X, Luo W, Chen H, He Y, J. Intell. Mater. Syst.Struct., 11, 43 (2000)

[7] Kanu RC, Shaw MT, J. Rheol., 42(3), 657 (1998)

[8] Shih YH, Conrad H, Int. J. Mod. Phys. B., 8, 2835 (1994)

[9] Tan ZJ, Zou XW, Zhang WB, Jin ZZ, Phys. Rev.E., 59, 3177 (1999)

[10] Jun JB, Uhm SY, Cho SH, Suh KD, Langmuir, 20(6), 2429 (2004)

[11] Block H, Kelly JP, Qin A, Watson T, Langmuir., 6, 6 (1990)

[12] Negita K, Ohsawa Y, J. Phys. II France., 5, 883 (1995)

[13] Gow CJ, Zukoski CF, J. Colloid Interface Sci., 136, 175 (1990)

[14] KhusidV B, Acrivos A, Phys. Rev. E., 52, 1669 (1995)

[15] Wu CW, Conrad H, J. Phys. D: Appl. Phys., 31, 3403 (1998)

[16] Atten P, Boissy C, Foulc JN, J. Electrostat., 40-41, 3 (1997)

[17] Hao T, Kawai A, Ikazaki F, Langmuir, 14(5), 1256 (1998)

[18] Shin K, Lee S, Kim JJ, Suh KD, Macromol. Rapid Commun., 31(22), 1987 (2010)

[19] Davis LC, J. Appl. Phys., 72, 1334 (1992)

[20] Liu YD, Fang FF, Choi HJ, Langmuir, 26(15), 12849 (2010)

[21] Choi HJ, Cho MS, Jhon MS, J. Mod. Phys. B., 13, 1901 (1999)

[22] Aizawa R, Vieira SL, Nakano M, Asaku Y, J. Mod.Phys. B., 15, 1070 (2001)