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The influence of oxide graphene (GO) on the tensile strength and bending strength at room temperature (RT) and cryogenic temperature (77 K) of carbon fiber/brominated epoxy/cyanate ester composites was studied in the present work.It is shown that the interracial adhesion between carbon fiber and matrix is significantly improved by the addition of GO.The tensile strength at RT and 77 K has been enhanced by 15.9% and 19.4% respectively while the bending strength at RT and 77 K has been increased by 13.4% and 16.9% respectively at the optimal content of 0.2 wt% GO.