Preparation And Chemically Reduction Of Laurylamine Modified Graphene Oxide And The Application Of Modified Graphene In Polycarbonate

It was found that the graphene has great thermal, electrical and mechanical properties. The modified graphene with good hydrophobicity has good compatibility with polymer, .which means a lot to the preparation of gaphene/polymer composites. In this paper, the modification method, the selection of graphite oxide modifier, the modification and reduction mechanism of graphite oxide (GO) with laurylamine and the application of modified graphene in polycarbonate are researched.Here is the main work and results of the dissertation:(1)The candidates for modification include antioxygen 1010, laurylamine and cetylamine.The modification methods include ball-milling, grind and ultrasound. At last, we choose laurylamine and cetylamine as modifiers after the characterization of XRD, FT-IR and SEM. For the first time, the modified GO was obtained by ultrasonication of the mixture of GO and laurylamine in the presence of a small amount of n-hexane.(2)The hydrophobicity and even dispersion property in DMF of modified GO was proved.The modified GO was characterized by XRD,FT-IR,SEM,XPS,TGA and Raman spectroscopy analysis.The reaction mechanism of GO with various laurylamine contents was put forward.(3)The modified graphene was characterized by XRD,FT-IR,XPS,Raman spectroscopy analysis and the reduction mechanism of laurylamine modified GO was put forward for the first time.(4)Modified graphene/polycarbonate composite material was preapared for the first time on the condition that the modified graphene and polycarbonate can form stable dispersion in DMF. The dielectric loss angle tangent and the dielectric constant of this composite material were investigated, and the results show that the composite material used for high frequency welding, high-frequency heating and conductive material is possible.