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Indexed by:期刊论文

Date of Publication:2017-08-01

Journal:JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION

Included Journals:SCIE、EI、Scopus

Volume:32

Issue:4

Page Number:854-861

ISSN No.:1000-2413

Key Words:electrorheological fluids; carrier liquid; shear stability; ER efficiency; sedimentation stability

Abstract:By using oxalate group-modified TiO2 nanoparticles as the dispersing phase, different kinds of silicone oil with various viscosities and terminal groups (hydroxyl, hydrogen, and methyl) were used as the dispersing media to prepare different electrorheological (ER) fluids. Their zero-field viscosity, yield stress under direct current electric fields, ER efficiency, shear stability, leakage current density, and sedimentation stability were tested to study the effect of carrier liquid on the properties of ER fluids. The results indicate that the zero-field viscosity, the yield stress, and the leakage current density increase with increasing viscosity of the silicone oils. The effects of the viscosity on the ER efficiency, the shear stability, and the sedimentation ratio depend on the competition between the viscous resistance and the aggregation of the particles. Among the three ER fluids prepared with silicone oil with different terminal groups, hydroxyl-terminated oil based sample has the highest zero-field viscosity, the highest field-induced yield stress and ER efficiency, the largest current density, and the best sedimentation stability.