▎ 摘　　要

Polybenzimidazobenzophenanthroline (BBL)/graphene nanocomposites were prepared by the liquid-phase exfoliation of graphene oxide (GO) in a BBL-methanesulfonic acid solution, followed by chemical reduction with hydroiodic acid (HI). This method prevents the aggregation of GO during the reduction of the solution-cast BBL/GO nanocomposite film. The in situ generated graphene played an important role in improving the electrical conductivity of the nanocomposites prepared by HI-reduction. The electrical conductivity of the HI-reduced BBL/GO nanocomposites (BBL/rGO(HI)) was similar to 2.5 orders of magnitude greater than that of the BBL/GO nanocomposites with 5 wt% GO content. Raman and X-ray photoelectron spectroscopy revealed the removal of oxygen functionalities from the GO surface after HI-reduction. Structural characterization of the nanocomposites by X-ray diffraction and scanning electron microscopy exhibited good exfoliation and dispersion of both GO and HI-reduced GO (rGO(HI)) nanosheets within the BBL matrix. A reasonable improvement in the thermal stability of the HI-reduced nanocomposite was also observed.