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Investigation of electrorheological properties of kaolin suspensions under DC fields
Author(s) -
Yilmaz Hasim,
Yilmaz Ummihan
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.25125
Subject(s) - silicone oil , materials science , viscoelasticity , electrorheological fluid , rheology , shear thinning , shear rate , composite material , electric field , viscosity , non newtonian fluid , shear stress , thermodynamics , physics , quantum mechanics
In this study, the electrorheological (ER) behavior of suspensions prepared from d 50 = 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 ( $ {\dot{\gamma}} $ ). Shear stress ( $ {\dot{\gamma}} $ ) of kaolin suspensions increased linearly with increasing concentrations of the particles and with the applied electric field strength. The viscosity (η) of all suspensions 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 temperature. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3798–3802, 2007