𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Electrorheological Effect in Suspension Composed of Starch Powder and Silicone Oil

✍ Scribed by K. Negita; H. Itou; T. Yakou

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
62 KB
Volume
209
Category
Article
ISSN
0021-9797

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✦ Synopsis

Measurements of the electrorheological (ER) effect, a rheological change induced by an application of an electric field, are made on the ER suspensions composed of potato starch powder and silicone oil. When an electric field of a few kV mm-1 is applied, there appears an increase in the viscosity, which is characterized by a rapid increase of the viscosity, followed by a slow increase having a relaxation time longer than a few minutes. As a possible mechanism, the chain and the columnar structure formations are suggested to be associated with the rapid and the slow components, respectively. It is also found that there appears a memory effect; if the electric field is turned off for a short period, the shear stress slowly induced by the electric field recovers its value instantaneously. Copyright 1999 Academic Press.

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