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Graphene having excellent thermal conductivity , electrical conductivity and mechanical properties, having a hydrophobic modified graphene polymer has good compatibility graphene / polymer composites of great significance . The paper mainly of graphite oxide (GO) of the modified method , the modifying agent selected and modified graphite ene proposed dodecylamine modified GO and hydrazine reduction the modified GO prepared modified graphene Mechanism , and final preparation of the modified graphene / polycarbonate composite material . The main findings are as follows : ( 1 ) selection of modifiers , including antioxidants 1010 , dodecylamine , hexadecylamine , modified methods include milling , grinding , ultrasound . Dodecylamine and hexadecylamine characterization by XRD, FT-IR, SEM and other means , and ultimately select to do the modifier , for the first time under the premise of the existence of a small amount of n-hexane were successfully prepared by ultrasonic oscillation amine modified GO . (2) in water and dimethylformamide (DMF) as the medium proved the the modified GO hydrophobic and uniform dispersibility in DMF . Characterized by XRD, FT-IR, SEM, XPS, TGA, Raman characterization means amine modified GO and the modified GO reaction mechanism that explores different dodecylamine content . (3) characterized by XRD, FT-IR, XPS, Raman characterization means the graphene modified , the first to investigate the reduction mechanism of amine- modified GO . (4) by means of the amine -modified graphene and polycarbonate can be uniformly dispersed in DMF this feature, the first prepared modified graphene / polycarbonate composite material , a dielectric loss of the composite material the tangent, and dielectric constant, and the results show that the composite material is expected to be applied to the high - frequency welding, high-frequency heating , and the conductive material .
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