▎ 摘　　要

A simple self-assembly method to construct a polyethyleneimine (PEI)-graphene oxide coating on wood surface is proposed to fabricate a 3D nano-interface of recyclable wood-polypropylene composites. The structure and assembly morphology were analyzed by ZETA potentials, FTIR spectra, scanning electron microscope images, and X-ray diffraction spectra. Due to the sufficient load transfer and interfacial adhesion of modified graphene, tensile, and flexural properties were improved greatly as well as the reinforcement of anti-degradation capability (shielding and migration). Additionally, with the enhancement of compatibility, water absorption value for measuring penetration also decreases apparently from 9.88 to 1.13 wt% when soaking for 24 h. Importantly, the low percolation threshold also illustrates that the assembled graphene interface formed a segregated network, which makes it uniquely potential for advancements in electron-transmission and thermal-management materials. POLYM. COMPOS., 40:3233-3241, 2019. (c) 2018 Society of Plastics Engineers