▎ 摘　　要

Nacre-like composite films with different ratios of graphene oxide (GO), polyvinyl alcohol (PVA) and carboxylated single-walled carbon nanotubes (SWCNTs) were prepared by solvent evaporation and chemical reduction. Changes in the microstructure, mechanical properties, electrical properties and thermal stability of the composite films were studied. It was found that the cross-section of the composite films had a regular inter-layer alternating structure. Meanwhile, introduction of SWCNTs not only improved the mechanical properties but also the in-plane (sigma(p)) and through-thickness (sigma(t)) conductivities of the composite films. The tensile strength of the composite film reached 62.8 MPa. The sigma(p) and sigma(t) of the composite film reached 806 S/m and 479 S/rn, respectively, 300 times and 490 times greater than the values obtained prior to the addition of the SWCNTs. Furthermore, the thermal stability of the composite film was also improved. (C) 2019 The Authors. Published by Elsevier Ltd.