The mechanical and thermal properties of epoxy were significantly enhanced modified by H20-g-PDI.

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In this report, we synthesized a new kind of liquid-crystal perylenebisimide polyurethane (LCPBI).Noncovalently functionalized reduced graphene oxide (RGO) with LCPBI was prepared via p-p stacking interactions. The noncovalently functionalized graphene nanosheets (LCPBI/RGO) were used to improve the thermal properties of epoxy composites, with modified Al 2 O 3 nanoparticles (Al 2 O 3 -APS) which were grafted with a silane coupling agent . We demonstrated that the thermal conductivity of the epoxy composites could be improved by hybrid LCPBI/RGO and Al 2 O 3 -APS fillers. For instance, the thermal conductivity of the epoxy composite with 30 wt% Al 2 O 3 -APS and 0.3 wt% LCPBI/RGO was 0.329 W m À1 K À1 , increased by 105.6% compared to that of the pure epoxy (0.16 W m À1 K À1 ). Meanwhile the glass transition temperature and storage modulus of epoxy composites with increasing hybrid fillers was improved, as well as the a-relaxation apparent activation energy.

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