鋁材先蝕刻再陽極處理製備十四酸超疏水膜

Preparation of Superhydrophobic Film of Myristic Acid by First Etching of Aluminum and then by Anodic Treatment

吳宗憲(Tzung-shian Wu)

指導教授 ： 施幸祥

大同大學/工程學院/化學工程學系所/碩士(2012年)

摘要

本研究主旨在於探討於鋁材上仿效蓮花效應，製備具超疏水性的表面。超疏水性表面的製備需要二個重要因素:一是表面須具備較低表面自由能;另一因素為需要較粗糙(微米級)的表面粗糙度。
實驗利用僅化學蝕刻以及蝕刻後再陽極氧化，兩種不同處理步驟，分別於鋁材表面構築粗糙結構，最後再以十四酸進行自組裝，製得具自清潔性的超疏水表面。
在蝕刻溶液濃度範圍於4.5M~5.25M時，且膜粗糙度範圍於2mm ~ 4mm之間，皆可獲得超疏水表面，其接觸角都在150°以上，而最佳操作條件於蝕刻溶液濃度5M、蝕刻時間為20分鐘再經由電流密度1A/dm2的陽極處理步驟後，進行十四酸自組裝之試片，得到高達170°的高接觸角，且液體與試片接觸面積僅1.82%，使得耐腐蝕性大幅提升。

關鍵字

超疏水 ； 十四酸 ； 陽極處理 ； 蝕刻

並列摘要

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m~4m, 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.

並列關鍵字

etch、anodic treatment、myristic acid、superhydr

參考文獻

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