Investigation of electrorheological properties of kaolin suspensions under DC fields

Yilmaz H., Yilmaz Ü.

Journal of Applied Polymer Science, vol.103, no.6, pp.3798-3802, 2007 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 103 Issue: 6
  • Publication Date: 2007
  • Doi Number: 10.1002/app.25125
  • Journal Name: Journal of Applied Polymer Science
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.3798-3802
  • Keywords: Electrorheological fluids, Kaolin/silicone oil suspensions, Shear stress, Temperature
  • Ankara Haci Bayram Veli University Affiliated: No

Abstract

In this study, the electrorheological (ER) behavior of suspensions prepared from d50 = 7 μm kaolin particulate, dispersed in insulating silicone oil (SO) medium, was investigated. ER activity of all the suspensions was observed to increase with increasing electric field strength (E), concentration (c), and decreasing shear rate (γ̇). Shear stress (γ̇) of kaolin suspensions increased linearly with increasing concentrations of the particles and with the applied electric field strength. The viscosity (η) of all suspen sions was decreased sharply with increasing shear rate and showing a typical shear thinning non-Newtonian viscoelastic behavior. It was observed that kaolin/silicone oil system studied in the present work was sensitive to high temper ature. © 2006 Wiley Periodicals, Inc.