Il Song Park, Tae Gyu Woo, Kyeong Won Seol, Tae Sung Bae and Min Ho Lee
Posters: J Material Sci
The purpose of this study is to evaluate the surface characteristics of titanium anodized using various electrolytes and different voltages. Three different electrolytes were used for anodizing; all of them contain 80wt. % glycerol. The main variables were the amount of NH 4 F and H 2 O. The concentration of NH 4 F and H2O in these three electrolytes was 0.5 wt.% NH 4 F+19.5 wt.% H 2 O, 1.0 wt.% NH 4 F+19.0 wt.% H 2 O and 1.5 wt.% NH 4 F+18.5 wt.% H 2 O. Anodic oxidation was performed at current density of 30mA/cm 2 up to 20 V, 30 V, and 40 V using a regulated DC power supply. FE-SEM was used to assess the surface morphology of the Ti plates after anodic oxidation. To evaluate the change in surface topography and surface free energy after treatment, surface roughness and contact angle measurements were performed. Biological analysis with MC3T3-E1 cells was carried out to determine the cellular response of TiO 2 nanotubes. The study reveals that a uniform TiO 2 nanotube layer is formed on the surface of Ti plates after anodic oxidation using all three electrolytes. The diameter of the TiO 2 nanotubes is decreased with NH 4 F concentration while it is increased with applied voltage. In addition, length of nanotubes and surface roughness are increased with applied voltage. At 40 V, though the diameter of the nanotubes is increased, its growth is restrained. TiO 2 nanotubes formed on Ti plates at 40 V exhibits excellent cell viability after 4-days culture.
Il Song Park has completed his Ph.D. at the age of 32 years from Chonbuk National University in South Korea and postdoctoral studies from Chonbuk National University and The University of Melbourne. Currently, he is the research Professor at the School of Dentistry, Chonbuk National University. He has published more than 80 papers in reputed journals.
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