▎ 摘　　要

Waterborne polyurethane (WPU) composites containing polyether amine functionalized graphene oxide (PAFG) were successfully fabricated via the in situ polymerization. The hydrophobicity, thermal stability, mechanical and anti-corrosion properties of WPU and WPU composites were investigated. As a result, the properties of WPU composites, such as hydrophobicity, thermal stability, mechanical and anti-corrosion properties were all enhanced when an appropriate concentration of nanoparticles were grafted. The content of PAFG was 0.05 wt%, the water contact angle and water absorption content were up to 98.5 degrees and 3.01 wt% of WPU composite compared to that of pure WPU (70.5 degrees and 8.31 wt%), respectively. In addition, the thermal and mechanical properties of WPU composite were also apparently enhanced. When the content of PAFG was 0.05 wt%, the decomposition temperature of 10 wt% weight loss of WPU composite could reach 322 degrees C, an increase of 29.3 degrees C compared to that of pure WPU. The tensile strength of WPU with the content of 0.05 wt% PAFG prominently improved by 130.92% relative to pure WPU. For electrochemical results, the vertical bar Z vertical bar(0.01Hz) of WPU was decreased dramatically from 2.95 x 10(7) to 1.37 x 10(6) Omega.cm(2) after 31 days immersion. In contrast, the vertical bar Z vertical bar(0.01Hz) of WPU/PAFG(0.05) was decreased to 3.98 x 10(7) from 5.00 x 10(7) Omega.cm(2), implying that 0.05 wt% PAFG significantly enhanced barrier property of WPU coating.