超疏水Co-MoS2复合镀层的制备及其性能

采用一步电沉积法制备了具有优异耐磨耐蚀的超疏水Co-MoS₂复合镀层。利用扫描电镜、X射线衍射仪、激光共聚焦显微镜、接触角测试仪及电化学工作站等系统研究了电流密度和电沉积时间对复合镀层的微观形貌结构、润湿性、自清洁效果、耐磨和耐蚀性能的影响规律及机理。结果表明,当电流密度为20 A/dm²,电沉积时间为30 min时,Co-MoS₂复合镀层实现超疏水效果,接触角达到最大值约151.4°,具有良好的自清洁防污性能。在2.5 kPa压力下与800 目砂纸摩擦1200 mm后,镀层表面仍具有高于146°接触角的良好疏水性,表现出优异的耐磨性能。该超疏水复合镀层还具有较好的耐腐蚀性能。一步电沉积法简单、经济高效且环保制备了高性能超疏水复合镀层,可望实现超疏水材料的实际应用。

Preparation and properties of superhydrophobic Co-MoS2 composite coating

A superhydrophobic Co-MoS₂ composite coating with excellent wear and corrosion resistance was prepared by one-step electrodeposition method. The influence law and mechanism of current density and electrodeposition time on microstructure, wettability, self-cleaning effect, wear and corrosion resistance of the composite coatings were systematically studied by means of scanning electron microscope, X-ray diffractometer, laser confocal microscope, contact angle tester and electrochemical workstation. The results show that the Co-MoS₂ composite coatings possess the superhydrophobic effect with the maximum contact angle value about 151.4°, good self-cleaning and anti-fouling performance under the current density of 20 A/dm² and electrodeposition time of 30 min. The coating surface still maintains good hydrophobicity with contact angle higher than 146° after the abrasion with 800 grit sandpaper for 1200 mm under pressure of 2.5 kPa, showing excellent wear resistance. Besides, the superhydrophobic composite coating also displays good corrosion resistance. The simple, cost-effective and environment friendly one-step electrodeposition method for fabrication superhydrophobic composite coating with high-performance is expected to realize the practical application of superhydrophobic materials.