Urea Effect on Strong Electrorheological Response of Novel Core-Shell Nanoparticles

Abstract:

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Electrorheological (ER) fluids are regarded as smart materials with potential for application in various industries because of the controllable viscosity, the reversibly and fast response. In this paper, core-shell structured Ni/Ti/Urea nanoparticles, as an ER material, were prepared by a sol-gel method. TEM, XRD and FT-IR spectra demonstrated that the Ni nanoparticles have been homogeneously coated with a 2 nm thick layer of TiO2 containing polar groups. The polar groups were caused by the introduction of urea. The ER effect of the fluids of Ni/Ti/Urea particles in silicone oil was investigated under a DC electric field. It is found that the ER fluids of the urea-doped Ni/TiO2/Urea particles have a high ER activity, which is 10 times that of the particles containing no urea. The polar groups in the particles are the intrinsic reasons for the enhancement of electrorheological effect.

Info:

Periodical:

Materials Science Forum (Volumes 675-677)

Edited by:

Yi Tan and Dongying Ju

Pages:

311-314

DOI:

10.4028/www.scientific.net/MSF.675-677.311

Citation:

S. K. Tan et al., "Urea Effect on Strong Electrorheological Response of Novel Core-Shell Nanoparticles", Materials Science Forum, Vols. 675-677, pp. 311-314, 2011

Online since:

February 2011

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Price:

$35.00

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