Abstract
Graphite oxide (GO) nanoparticles were synthesized by modified Hummer method. DLS results suggest that the average size of GO nanoparticles is 140 nm. EDX study confirms the presence of oxygen containing functional groups in GO sheet. Polysulfone (PSF/GO) and Poly (styrene co-acrylonitrile) (PSAN/GO) polymer nanocomposites were prepared by solution casting technique. The ionic and electronic conductivity behaviors of PSF/GO and PSAN/GO polymer nanocomposites were measured. The increased conductivity with increasing GO nanoparticles loading is due to the conductivity chain formation and increased mobility of charge carriers. The effect of crystallinity and free volume on electrical conductivity of PSF/GO and PSAN/GO polymer nanocomposites is explored. PSF/GO and PSAN/GO nanocomposites exhibit high electrical conductivity with low amount of (0.6 wt% and 1.0 wt%) GO loading is due to the formation of GO networks by the strong chemical interaction induced crystallinity of the polymer matrix. This is evident from FTIR and Raman spectroscopy studies.
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