Effects of Surface Roughness and Chemical Species on Hydrophilicity of Anodized Film on Ti-6Al-4V Formed at a Low Current Density

Abstract:

Anodization of Ti-6Al-4V is crucial for dental implants because it promotes the roughness, chemical species and hydrophilicity of the surface that leads to its biocompatibility. The anodized film was prepared by the galvanostatic method at a low current density in either 1 M H₃PO₄ or 1 M NaOH as the electrolyte. The as-anodized film showed a significant decrease in the water contact angle, likely to be due to an increased surface roughness (as revealed by scanning electron and atomic force microcopy) and change in the surface species (as revealed by X-ray photoelectron spectroscopy, XPS). XPS analyses confirmed that the Ti2p spectra scarcely changed while the O1s spectra significantly changed due to Ti-OH bonding. Moreover, the O/Ti ratio of the as-anodized film was increased. The results suggest that anodization by the galvanostatic method at a low current density in 1 M H₃PO₄ or 1 M NaOH could enhance the surface roughness and chemical surface species, and that both are likely to be important factors for enhancing the hydrophilicity of the anodized films.

• Periodical: Advanced Materials Research (Volume 664)
• Pages: 774-779
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.664.774
• Online since: February 2013
• Authors: Phanawan Whangdee, Siritida Chukasorn, Viritpon Srimaneepong, Tomoaki Watanabe, Dujreutai Pongkao Kashima
• Keywords: Anodize, Hydrophilicity, Low Current Density, Roughness, Surface Species, Ti6Al4V

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