Properties of Electrorheological Fluids Containing Numerously Sulfonated Polymer Particles
Of great interest is that electrorheological (ER) fluids are put in practical use.1,2,3 In order that an ER fluid can be utilized in a variety of applications, the ER fluid needs to meet several requirements all together.4,5 At the present time, no ER fluid is likely to fill all of those requirements. It is well-known that ER fluids containing hydrophilic particles with small amounts of moisture induce a relatively large shear stress under an electric field.6,7,8 However, when the electric field is continuously supplied to the ER fluid, a concurrent current density gradually increases and finally dielectric breakdown occurs. In order to put the ER fluids in practical use, they have to show good durability.
KeywordsShear Stress Sulfonic Acid Group Dielectric Breakdown Chlorosulfonic Acid Current Property
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