| Summary: | 碩士 === 中山醫學大學 === 口腔材料科學研究所 === 100 === Titanium dioxide surface morphology and crystalline phase relative biological activity has a great impact. In this study, the surface modification of the titanium metal by anodic oxidation method for processing, as an electrolyte containing ethylene glycol of 0.3wt% NH4F and 2wt% H2O, titanium oxide nanotubes prepared by controlling the voltage and the electrolysis time, and then anatase phase was obtained by annealing (350℃, 2hr), immersed in simulated body fluid (SBF) assessment biomineralization ability and surface hydrophobicity was determined. Evaluate the suitable Titanium dioxide nanotube surface structure is used in bone repair material. The results showed that electrolysis after 40min when the surface of the specimen arrangement of uniform nanotube structure, voltage control 10V, 20V, 30V, can be prepared by a different diameter size nanotube structure, diameter, and is proportional to the voltage relationship, T34 group (30V, 40min) surface of the tubular characteristics complete in sizes of 75 ± 6.26 nm, when the voltage to 40V, the surface of the specimen at the same time has a mesh and tubular structures. Specimen soaked SBF for 7 days and found that T22, T34, T22A, T36A, T42A, XRD analysis apatite characteristic peaks appeared, which the T34 apatite highest signal strength. The apatite formation of specimen surface was evaluated by field emission scanning electron microscope (FESEM), wherein T34 group have best performance. Literature show anatase phase titanium dioxide hydrophilic higher than the non-crystalline titanium dioxide. In our study show that amorphous titanium dioxide surface by tubular structure similar after annealing anatase surface hydrophilic confirmed the structure of titanium dioxide nanotubes can enhance surface hydrophilic and biomineralization effect.
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