Fabrication and electric stimuli-response of semiconducting poly(3,4-ethylenedioxythiophene)/silica nanocomposite particles

초록

As an electrically stimuli-responsive organic/inorganic hybrid material, poly(3,4-ethylenedioxythiophene) (PEDOT)/silica nanocomposite particles were synthesized by in-situ chemical oxidative polymerization using an ultrafine methanolic silica sol. The morphology and structure of the PEDOT/silica nanocomposite were confirmed by both scanning electron microscopy and transmission electron microscopy, while their chemical structure and thermal properties were examined by Fourier transform infrared spectroscopy and thermogravimetric analysis, respectively. The rheological response of the PEDOT/silica-based electrorheological (ER) fluid dispersed in silicone oil was measured using a rotational rheometer. Under an electric field, the ER fluid exhibited a solid-like behavior and the flow curves of shear stress were fitted well to the Cho-Choi-Jhon model. In addition, the dielectric property of PEDOT/silica nanocomposite exhibited a relatively small polarizability difference, but with a very short relaxation time.

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