Study of conjugated polymer/graphene oxide nanocomposites as flexible dielectric medium

Poly (3,4-ethylenedioxythiophene): (Polystyrenesulfonate) (PEDOT: PSS)/polypyrrole (PPy) and polyvinyl alcohol (PVA) loaded with Graphene oxide (GO) nanocomposites were prepared by sonication. GO (0.5-2.5 wt%) was dispersed homogeneously in the polymer matrix without severe aggregations. The structure and morphology of the composites was evaluated by Fourier transform infrared spectroscopy, UV-Vis spectroscopy, X-ray diffraction, Thermogravimetric analysis (TGA), Atomic force microscopy and Scanning electron microscopy. Microscopic measurements demonstrated that the GO was presence of GO in polymer system. Dielectric properties have been measured as function of broadband frequency (50 Hz-20 MHz) and temperature (40-150 A degrees C). TGA results indicate improvement in the thermal stability of composites. Hence, based on the results obtained, we believe that PEDOT-PSS/PPy/PVA/GO composites films have potential to be used as flexible dielectric materials and for high performance charge storage device applications.