Abstract

Semiconducting phosphoric acid doped polyaniline (PANI-H3PO4) particles were synthesized by chemical oxidation polymerization, and their chemical structure and particle size were examined via Fourier transform IR spectroscopy (FT-IR) and scanning electron microscopy (SEM), respectively. Electrorheological (ER) fluids were prepared by dispersing the synthesized PANI-H3PO4 particles in kerosine, and their steady shear rheological properties under applied electric fields were investigated using a rotational rheometer with a high-voltage generator. The PANI-H3PO4 synthesized in this study possesses a typical ER behavior: large increase of shear stress with applied electric field strengths.

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