Hydrophilic/Hydrophobic Behavior on Ti Foil Surface Prepared by Anodization

Abstract:

Hydrophilic/hydrophobic behavior on Ti foil surface prepared during anodization process was examined. The titanium foils were anodized in electrolyte contained 0.25wt% NH4F, 2.5vol% water and the ethylene glycol under direct voltage of 40V at room temperature for 3h. The anodized specimens were oscillated in ultrasonic clearer for 10 min or 30 min. The surface morphologies of the specimens during different stages of the process were observed by field-emission scanning electron microscopy (FESEM). The wettability of specimen surface was estimated by measuring contact angle (CA) of water droplets on specimen surface. The results show wetting angle on the surface of the Ti specimens after anodization process is at the range of 149° to 153°, indicating hydrophobic or even superhydrophobic property. CAs on the anodized specimens after oscillation in ultrasonic clearer is at the range of 25° to 42°, indicating the hydrophilic property. Hydrophilic/hydrophobic behavior on Ti foil surface during the process was explained by morphology on titanium surface.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 1659-1662
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.1659
• Online since: December 2012
• Authors: Y. C. Liang*, C.H Xu, Yu Fei You, M. Y. Tian, J. Chen, H. P. Zhang
• Keywords: Anodization, Hydrophilic/Hydrophobic, Micro-/Nanometer Structure, TiO₂ Nanotube

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