关键词: 超疏水表面, 砂纸, 聚合物, 接触角

Abstract: Abrasive papers are well-known tool for polishing solid surface with different roughnesses. Here we present a facile method for making superhydrophobic surface using the metallographic abrasive papers as the mold. The rough surfaces of polymers including polydimethylsiloxane, polyethylene, polypropylene, and polystyrene were prepared with casting or hot embossing on the abrasive paper molds. SEM results reveal that the roughness of the polymer surface could be controlled by selecting the mold. Contact angle measurement shows that the water contact angle(WCA) on the as-prepared surfaces increased with the increase of roughness of the abrasive papers used, especially, the WCA on the surfaces prepared with types of W7, W5 abrasive papers can reach more than 150°, alias superhydrophobic surface. The replicas show that the changing from Wenzel state to Cassie state indicated the roughness changing. And the difference of WCA on rough surface between polymers with different intrinsic contact angles is decreased while Wenzel state changes to Cassie state.

Key words: Superhydrohobic surface, Abrasive paper, Polymer, Contact angle