Effect of ethanol on hydrophilicity of the anodized films performed by two-step anodization at low current density
AbstractDental implants are usually made from commercially pure titanium or its alloys. The aim of this research was to evaluate the influence of the ethanol addition in 1 M H3PO4 as an electrolyte on hydrophilicity of the anodized films. Ti-6Al-4V alloy plates were modified using two-step anodization at a low current density of 2 mA cm-2 in 1 M H3PO4 with addition of used as an electrolyte. Surface oxide properties were characterized by using various surface analytic techniques, including Field Emission Scanning Electron Microscope (FE-SEM), Atomic Force Microscope (AFM), X-ray photoelectron spectroscopy (XPS) and contact angle measurement. The non-treated Ti-6Al-4V and the anodized films formed by one-step anodization were used as control samples. A significant increase in hydrophilicity (p<0.05) was observed on the anodized films formed in H3PO4 with addition of 80% V/V ethanol via two-step anodization due to the formation of rough surface, hydroxyl groups (OH-) and adsorbed molecular water (H2O). The enhanced hydrophilicity could be explained by both the surface chemistry and surface topography of the anodized films.
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