Abstract
In this paper we present a novel approach for producing obvious strengthening ofthe magnetorheological (MR) effect of MR fluids. Carbonyl iron powders coatedwith guar gum were used as magnetic particles in the MR fluid. Experimentalresults showed that inducing a guar gum coating not only greatly improved thesedimentation stability but also strengthened the yield stress of the MR fluid. Anintermolecular force based model was proposed for explaining the strengthening effect.
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