Studies of Titanium Treated by Plasma and Etched by Dual Acid in the Supercritical Carbon Dioxide

• Main Authors: Wei, Mingkou, 魏明國
• Other Authors: Lin, ChaoJen
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/74403215169961514864

碩士 === 國立中正大學 === 化學工程研究所 === 100 === Titanium have been often used in biomedical explants, the weight of titanium is light and hard, making excellent mechanical properties, resistant to corrosion, resistance to chemical attacks, low thermal conductivity and biocompatibility advantages. Biomedical explants are a human direct contact with the material, so the surface characteristics and most important, by surface modification to improve biocompatibility is one of the main research focus of biomedical explants. This research has been devided into two parts in order to analyze surface treatment. Firstly, Oxygen plasma etching is applied to surface passivation and roughness transformation. Sandblasted was used to change surface roughness, but bead and powder which during the procedure of surface transformation might remain on the surface treatment. The ways in which plasma etching avoids the remaining on the surface effectively. Meanwhile, the effect of TiO2 layer increases due to power addition and time of plasma extention, which increases the surface roughness and size of hole. Secondly, Supercritical fluid characterizes non-surface-tention and low-viscosity which is similiar to gas, Daul acid (H2SO4 / HCl) in supercritical carbon dioxide (SC-CO2) etching solution etching after plasma treatment the surface of the titanium, found that the etching solution is easy to react with the surface, and etched to dense and porous structure,The dense and porous structure of the branched biocompatible, but found that the acid (H2SO4 / HCl) etching liquid and supercritical CO2 miscible, the etching rate will be lower than the atmospheric pressure, and the pressure rise, the etch rate of decline.