Preparation and performance of functionalized graphene oxide composite thin films
The carbon-based filler/polymer composites are currently one of the research focuses for flexible heating elements due to their high flexibility,low cost,and simple processing.However,the dispersion of carbon-based fillers in the poly-mer matrix remains a challenge for their application in composite films.In this study,the p-phenylenediamine functional-ized graphene oxide(PGO)was prepared and then the polyurethane(PU)/super conductive carbon black(SP)/PGO com-posite films with different PGO additions were prepared by solution casting method.The structure and properties of PGO and composite films were studied by XPS photoelectron spectroscopy,microstructure analysis and tests of electrical conductivi-ty,thermal conductivity and electrothermal performance.The results showed that PGO and SP were uniformly dispersed in the polyurethane matrix.When the mass fraction of PGO was 5％,thecomprehensive performance of the composite film was the best.The thermal conductivity and conductivity of the composite film were improved by the introduction of PGO,there-by enhancing its maximum heating temperature and in-plane temperature uniformity.As electrical heating elements,ther heating temperature of the composite films can be controlled by adjusting the applied power,which has fast temperature re-sponse,high electric thermal conversion efficiency,and good in-plane temperature uniformity.
functionalized graphene oxidesuperconductive carbon blackcomposite filmelectrical heating perfor-mancein-plane temperature uniformity
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