A rheo-optical and materials approach to electrorheology

Author

Jordan, Therese C. ; Wong, Wilkey ; Shaw, Montgomery T.

Author_Institution

Inst. of Mater. Sci., Connecticut Univ., Storrs, CT, USA

fYear

1988

fDate

16-20 Oct 1988

Firstpage

493

Lastpage

499

Abstract

A technique was developed to measure simultaneously the rheological and optical response of electrorheological (ER) fluids in combined shear and electric fields. Rheo-optical results for a commercial ER fluid exhibit microstructural changes occurring upon application of an electric field that are well within the time frame of the rheological response. It is noted that additional evidence is needed to verify or refute particle fibrilation as the fundamental underlying mechanism necessary for ER activity. Novel fluids in which the dispersed particles are microcapsules with a polystyrene wall and primarily water core have been prepared. These fluids are ER-active and will be used in the future to investigate interfacial and bulk polarization modes independently

Keywords

disperse systems; electric field effects; rheology; shear flow; two-phase flow; bulk polarization modes; combined shear and electric fields; dispersed particles; electrorheological fluids; interfacial mode; microcapsules; microstructural changes; optical response; particle fibrilation; polystyrene wall; rheological response; Erbium; Materials science and technology; Oils; Rheology; Silicon compounds; Solids; Spectroscopy; Stress; Viscosity; Windows;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1988. Annual Report., Conference on

Conference_Location

Ottawa, Ont.

Type

conf

DOI

10.1109/CEIDP.1988.26378

Filename

26378