表面形貌对润湿性及抗附着性能的影响

摘要

In order to study the impacts of the surface pattern on its wettability and antifouling performance,la-ser etching technique was used to build dot micro-structure and shell surface like grid micro-structure,and the nano-SiO2 powders were coated on the micro-structures to build micro-nano structures.It was shown that after laser etching,Ti6Al4V alloy surface change from hydrophilic state to super hydrophilic one.Trough low sur-face energy modification,the dot micro structure surface was in hydrophobic state that was in accordance with Wenzel model,while the grid micro structure surface was in super hydrophobic state that was in accordance with Wenzel model.The surfaces with the micro-nano structure formed both by coating the nano-SiO2 on the dot or grid micro-structures were both in super hydrophobic state that were in accordance with Cassie model. The grid structure surfaces have greater contact angles and smaller roll angles.Sea-side exposure test showed that the order of the surfaces in terms of the amounts of the attached microbial membranes were as follows:the dot micro-structure surface in super hydrophilic state,polishing surface in hydrophilic state,grid micro-struc-ture surface in super hydrophilic state,and the super hydrophobic surface in accordance with Cassie model.%为研究表面形貌对表面润湿性和抗附着性能的影响,采用激光刻蚀技术制备点阵微结构和仿生贝壳表面网格微结构,将Si O 2纳米粒子涂覆在微结构上制备微纳结构。研究表明,Ti6Al4V 合金表面经激光刻蚀后由亲水变为超亲水状态。经低表面能修饰后,点阵微结构表面符合 Wenzel 模式的疏水状态,而网格微结构表面符合 Wenzel 模式的超疏水状态。在点阵和网格微结构上涂覆 Si O 2形成微纳结构表面均符合Cassie模式的超疏水状态,且网格结构表面的接触角更大,滚动角更小。浅海挂板实验显示,微生物粘膜附着量由多至少的顺序为：超亲水状态的点阵微结构表面>亲水的抛光表面>超亲水状态的仿生网格微结构表面>符合Cassie模式的超疏水表面。