▎ 摘　　要

In this work, exfoliated carboxylated graphene (CG) was used to prepare nanocomposite films of modified polyvinyl alcohol (MPVA) incorporated with maleic anhydride through simple hydrothermal and ultrasonic methods. A 3D network structure formed by strong bonds between CG and MPVA greatly improved the mechanical and barrier properties of MPVA. CG endowed the films with conductivity at high and low temperatures. When the CG content was 2%, the tensile properties, oxygen and water vapor barrier performance of the nanocomposite films were significantly improved. Moreover, CG enhanced the hydrophobicity of MPVA, making the nanocomposite films more water-resistant and durable. Compared with nanocomposites of PVA containing graphene or graphene oxide reported by previous studies, the nanocomposite films with optimal CG content in this present study had greater improvement and better overall performance. This new type of conductive antibacterial nanocomposite films would have potential as packaging materials with improved barrier properties.