Electrorheological Properties of Suspensions of Polypyrrole- Coated Titanate Nanorods

Electrorheological Properties of Suspensions of Polypyrrole- Coated Titanate Nanorods

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The behaviour of silicone-oil suspensions of titanate nanorods coated with polypyrrole base in electric field has been investigated.Unlike suspension of globular particles of neat Dong Quai polypyrrole, rod-like particles show a stronger electrorheological (ER) effect corresponding to high rigidity of the structure.A great influence of the oil viscosity on the ER Toner efficiency was observed.

A good reproducibility of the effect and a fast response to the switchingon and -off the electric field has been confirmed by monitoring the time course of shear stress under controlled shear rate.