类铠甲化超疏水金属表面的简易制备及其性能

Simple preparation and properties of armored-like superhydrophobic metal surfaces

通过在铝板表面喷砂以构建铠甲化的金属表面,并喷涂超疏水SiO2和聚氨酯的混合液赋予铠甲化表面超疏水性能,制备出类铠甲化超疏水金属表面(armor-like superhydrophobic metal surface,ASMS)。利用SEM和接触角测量仪对ASMS的微观结构和浸润性进行了表征。同时,对ASMS的机械稳定性和化学稳定性进行了评估,并展示了其自清洁性能。结果表明,ASMS具有高达164°的静态水接触角和2°的滚动角。随后,分别在平均3.67 N外力往复摩擦磨损循环80次、胶带撕拉剥离循环100次、水流冲击50次等机械稳定性测试后,ASMS均能维持超疏水性能。同时,分别在强酸(pH=2)、强碱(pH=12)中浸泡72 h、紫外辐照(1.2 W/m^(2))72 h、200℃下保温2 h等化学稳定性测试后,ASMS也能维持超疏水性能。ASMS表面制备简单、成本低廉、易批量制备,在大规模生产超疏水金属材料领域有广泛的潜在应用。

Armor-like superhydrophobic metal surface(ASMS)is prepared by sandblasting the aluminum plate surface to build the armored metal surface,and spraying the mixture of superhydrophobic silica and polyurethane to give the armored surface superhydrophobic performance.The microstructure and wettability of the ASMS were characterized by SEM and dynamic contact angle instrument,respectively.At the same time,the mechanical stability and chemical stability of ASMS were evaluated,and its self-cleaning performance was demonstrated.The results show that the ASMS exhibits a static water contact angle of 164°and a rolling angle of 2°.Subsequently,after mechanical stability tests such as average 3.67 N reciprocating friction and wear cycles for 80 times,tape tearing and wearing cycles for 100 times,and water impact for 50 times,the ASMS was able to maintain superhydrophobic performance,and its contact angle is greater than 150°.At the same time,after chemical stability tests such as immersion in strong acid(pH=2)and strong alkali(pH=12)for 72 h,UV irradiation(1.2 W/m^(2))for 72 h,and thermal insulation at 200℃for 2 h,ASMS can also maintain superhydrophobic performance,and its contact angle is greater than 160°.The surface preparation in this paper is simple,cheap and easy to batch prepare,which has a wide range of potential applications in the field of large-scale production of superhydrophobic metal materials.