▎ 摘　　要

The application of graphene (Gr) to enhance atomic oxygen (AO) erosion resistance and mechanical properties was demonstrated in this study. Gr-reinforced cellulose acetate (CA) composite films were obtained by flattening with a glass rod, and the AO erosion resistance was investigated in a plasma-type, ground-based AO effect simulation facility. Significant improvements in the mechanical properties and AO erosion resistance were achieved at relatively low Gr contents. A 59 +/- 7% decrease in the mass loss and a 12 +/- 3% increase in the tensile strength were achieved by the addition of only 1 wt % Gr. Moreover, the layered structure of the fractured surfaces and the excellent mechanical properties illustrated the homogeneous dispersion of Gr in the CA matrix and the strong interactions between Gr and CA. Furthermore, Gr flakes served as shields to defend the underside of CA from AO erosion because of the specific two-dimensional structure and outstanding AO erosion resistance. Therefore, this research provides a new and effective strategy for improving the mechanical strength and AO erosion resistance of polymer materials. (c) 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40292.