||This thesis the preparation of superhydrophobic aluminum through a hierarchical structure on the surface to imitate nature lotus. Experiments on the production of aluminum etched roughness micron level, then all kinds of mixed acid anodizing on which nanoscale surface preparation, finally immersed in myristic acid solution to preparate super-hydrophobic membrane, analysis of fixed electrolysis time, changing the current the thickness of the size of the mixed acid anodizing, the relationship between roughness and hardness with superhydrophobic angle.
This experiment is to study the use of sulfuric acid anodizing electrolyte add a variety of different acids to identify the differences between each other relatively pure sulfuric acid and mixed acid.
Overall, the reduced thickness compared to the three mixing pure sulfuric acid of about 13μm ~ 17 μm, but there are the trend curves , when current density on 2A/dm2 is the maximum; the hardness increased significantly enhance the average 120 Hv ~ 150 Hv , under the condition that the maximum value of s sulfosalicylic acid and sulfuric acid solution with a current density of 3A/dm2, its value is 320 Hv; average contact angle is preferred when the current density 1A/dm2 in sulfuric acid mixed sulfosalicylic acid, when the current density of 1A/dm2 and 2A/dm2 has reached 151 °;
In terms of the degree of hydrophobicity, hydrophobicity to achieve better quality, anodized in sulfosalicylic acid and sulfuric acid solution, you can have average contact angle of 150 ° or more . The use of mixed acid anodizing, the contact angle after a year, only 1 ° to 4 ° reduced, but the contact angle of pure sulfuric acid there fell 7 ° to 12 °, so think through the use of mixed acid electrolyte conduct anodizing, superhydrophobic experiments conducted can effectively improve the long-term nature.