Fabrication of aluminum-based superhydrophobic surface with micro/nano-structure and its anti-icing/frost properties
[Introduction]It is an efficient method to endow aluminum an excellent anti-icing/frost performance by fabricating a superhydrophobic surface with micro/nano-structures.However,the superhydrophobicity of such aluminum surface often becomes worse gradually or even loses during practical application.The stability of micro/nano-structure is one of the important factors influencing the durability of superhydrophobicity.[Method]An aluminum-based superhydrophobic surface with micro/nano-structures(coded as MN-SHS)was fabricated as follows:1)conducting two-step anodization on aluminum to form a nanoporous structure on its surface;2)imprinting with a stainless steel mesh template to form a microstructure;3)pore widening;and 4)modification with a low-surface-energy compound such as 1H,1H,2H,2H-perfluorooctyltriethoxysilane.The surface morphology,water contact angle,adhesion to water droplet,anti-icing/frost properties,and durability of MN-SHS were compared with those of the aluminum just treated by two-step anodization and the aluminum treated by two-step anodization and pore widening.[Result]The MN-SHS featured a water contact angle of 164°,low adhesion to water droplet,as well as the best anti-icing/frost properties and durability.[Conclusion]An aluminum-based superhydrophobic surface with micro/nano-structures can be obtained by anodic oxidation in combination with micro-imprinting,which has a good application potential in the field of anti-icing/frost.
aluminumsuperhydrophobicityanti-icing/frostanodic oxidationimprintingmicro/nano-structurelow adhesion to droplet
NETL
NSTL
万方数据
