| Summary: | 碩士 === 大同大學 === 化學工程學系(所) === 99 === Using the two methods of anodic oxidation and chemical etching to make a rough surface structure on aluminum, then the super-hydrophobic self-cleaning surfaces are obtained through the procedure of self-assembled surface from the siloxane. The roughness of aluminum film is between 316nm and 364nm, the contact angle is above to 150 °, it is required to make a super-hydrophobic surface. And the best operating conditions to obtain the super-hydrophobic surface are: 3M sulfuric acid in the anodizing step and 20min etching time, the contact angle with water droplets will up to 157.58°, and the wetting area will be 10.94%, and the remaining area of 89.06% is the 343nm rough structure on which the gas is contacted, that resulting in the highest corrosion resistance . After the different microstructure and hydrophobicity of the surface were studied, the effects of film thickness and roughness on the hydrophobic properties were analyzed. The structure of the coating surface and the super-hydrophobic properties were also investigated. It indicates that the surface roughness and low surface energy material are the two key points of the super-hydrophobic effect.
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