▎ 摘　　要

A series of antifouling composite coatings based on guanidine-functionalized graphene (GNG) and self-polishing boron acrylate polymer (BAP) were prepared. Compared to graphene oxide, GNG had more wrinkles on its surface and was more uniformly distributed in the interior and on the surface of BAP, resulting in the tight binding of inorganic and organic compounds at the interface. The BAP/GNG composite coatings exhibited excellent algae anti-adhesion performance. Specifically, the inhibition rate of Phaeodactylum tricornutum reached 99.2%, and high antibacterial rates of up to 94.2% and 95% were obtained for Escherichia coli and Staphylococcus aureus, respectively. This performance is ascribed to the polishing of BPA, exposing the guanidine-functionalized graphene on the surface. On one hand, as a filler, the prepared guanidine-functionalized graphene improved the antifouling ability by adjusting the hydrolysis rate of the antifouling coating. On the other hand, the exposure of guanidine-functionalized graphene and the hydrolysis of the polymer matrix enhanced the antifouling capability. BAP/GNG shows promise as an antifouling coating with potential applications in marine antifouling.