▎ 摘　　要

Graphene films with different lateral sizes and poly(vinylbutyral) (PVB)/graphene composites were fabricated. The morphological structural and mechanical properties were characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), four-probe conductivity measurements and tensile strength testing (TST). The results show that, graphene oxide (GO) and reduced graphene oxide (RGO) with different lateral sizes were fabricated successfully. As the lateral size of the GO decreased, the tensile strength and modulus of GO films was improved; however, the tensile modulus of the film fabricated with nanoscale GO film decreased. RGO samples with a large area and those that are nanosized exhibited high electrical conductivities of 867 S/m and 927 S/m, respectively. The tensile strength and modulus of the PVB/GO and PVB/RGO composites increased at low filler contents, exhibiting a maximum at 0.1 wt%. The tensile strength increased by 31% and 29%, and the tensile modulus increased by 20% and 24%, respectively, for the composites fabricated with the smallest GO and RGO. In contrast, the elongation at break of the PVB/graphene composite materials decreased.