Carbon Nanotubes-Adsorbed Polymeric Microspheres for Electrorheological Fluids


Article Preview

Surface-conductive microspheres consisting of poly(methyl methacrylate) (PMMA) (6.5 μm) core and carbon nanotubes (CNTs)-adsorbed shell were prepared using a simple process involving the blending of two colloidal solution; an aqueous CNT dispersion with surfactants and an aqueous PMMA microsphere colloid. These were adopted as the suspended particles for electrorheological (ER) fluids, in which the electrical conductivity originated primarily from the surface-coated conducting CNT layers. The CNT-adsorbed polymeric microspheres were monodisperse and spherical in shape. The CNT-PMMA composite suspensions in silicone oil showed the typical ER characteristics of forming a chain-like structure under an applied electric field. The CNT-PMMA composite microspheres exhibited a conductivity ranging from 5.2×10-4 to 6.3×10-5 S/cm, which is an acceptable conductivity range for ER fluids. This phenomenon can be explained by the interfacial polarizability of CNTs adsorbed on the surface of the polymeric microspheres.



Key Engineering Materials (Volumes 321-323)

Edited by:

Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi




S. H. Yoon et al., "Carbon Nanotubes-Adsorbed Polymeric Microspheres for Electrorheological Fluids", Key Engineering Materials, Vols. 321-323, pp. 917-920, 2006

Online since:

October 2006




[1] S. Iijima: Nature Vol. 354 (1991), p.56.

[2] P.J.F. Harris: International Materials Review Vol. 49 (2004), p.31.

[3] J. Chen, M.A. Hamon, H. Hu, Y. Chen, A.M. Rao, P.C. Eklund and R.C. Haddon: Science Vol. 282 (1998), p.95.

[4] J.H. Sung, H.S. Kim, H. -J. Jin, H.J. Choi and I. -J. Chin: Macromolecules Vol. 37 (2004), p.9899.

[5] H. -J. Jin, H.J. Choi, S.H. Yoon, S.J. Myung and S.E. Shim: Chem. Mater. Vol. 17 (2005), p.4034.

[6] H.S. Kim, H. -J. Jin, S.J. Myung, M. Kang and I. -J. Chin: Macromol. Rapid Commun. Vol. 27 (2006), p.146.

[7] S.J. Park, S.T. Lim, M.S. Cho, H.M. Kim, J. Joo and H.J. Choi: Current Appl. Phys. Vol. 5 (2005), p.302.

[8] T. Hao: Adv. Mater Vol. 13 (2001), p.1847.

[9] Y.H. Cho, M.S. Cho, H.J. Choi and M.S. Jhon: Colloid Polym. Sci. Vol. 280 (2002), p.1062.

[10] S.E. Shim, H. Jung, K. Lee, J.M. Lee and S. Choe: J. Colloid Interface Sci Vol. 279 (2004), p.464.