Preparation of Superhydrophobic Film of Myristic Acid by First Etching of Aluminum and then by Anodic Treatment
| Autor: | Tzung-shian Wu, 吳宗憲 |
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| Rok vydání: | 2012 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 This research aims at the investigation of preparing the superhydrophobic surfaces on the aluminum materials by simulating the lotus effect. The preparation of superhydrophobic surface requires two important factors: The one factor in that the surface must possess lower surface free energy; and the other one in that the surface requires surface roughness of rough(micron) degree. In this experiment, two different treatment procedures (1)solely chemical etching and (2)etching then anodic oxidation structures on the aluminum surface; finally the surface are self-assembled with myristic acid, and hence superhydrophobic surfaces with self-cleaning characteristics are obtained. So the concentration of the etching solution in within the range of 4.5M~5.25M, and the film roughness is in the range of 2?慆~4?慆, superhydrophobic surfaces can be obtained in both of these conditions, their contact angles are all above 150°. The optimal operating condition are that the etching solution concentration is 5M, and that the etching time in 20 min. After the anodic treatment procedure with the current density of 1A/dm2, self-assembled samples with myristic acid are carried out to obtain high contact angle of 170° and the contact area between liquid and sample in only 1.82%, so that the anti-corrosion properties are highly increased. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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