Thesis
Growth and thermal degradation of titanium oxide nanotubes on titanium for bone implants: a microstructural evaluation
Washington State University
Master of Science (MS), Washington State University
2009
Handle:
https://hdl.handle.net/2376/101791
Abstract
Titanium oxide nanotubes are widely been investigated for surface modification for artificial titanium bone implants. Excellent osseointegration, high corrosion resistant and being biocompatible, titanium and its alloys are one of few elements that can be used for bone implants with very few known toxic effects. Surface modification of titanium implants is the key aspect for better tissue integration and bone ingrowths. It has been noted that surface modification of titanium implants has resulted an increase in life time of artificial bone implants. In this research, we have investigated methods to grow titanium oxide nanotubes in micrometer scale. We have found that when titanium substrates are anodized with anhydrous glycerol and ammonium fluoride, the growth of nanotube is a function of time and nanotube show both voltage and time specific morphology when anodized for six hours. High temperature degradation analysis shows that nanotubes can withstand higher temperature up to 300°C without any significant degradation. It was also noted that, as the duration of the experiments were increased, so did the length of nanotubes. The approximate length of nanotubes was ~ 5 micrometer on titanium substrate after 17 hours of anodization. Contact angle data indicated that with an increase in duration of experiment, the contact angle decreased. Overall nanotubes grown in this electrolyte showed a transition in morphology – from uniform structure at low times to a bi-modal porosity distribution at 6 h and then a uniform structure at 10 h or more. Based on the applied voltage, optimum nanotube growth was found at 20V. At lower applied voltage, the growths of nanotubes were not clear, and at higher applied voltage, nanotube structures collapsed.
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Details
- Title
- Growth and thermal degradation of titanium oxide nanotubes on titanium for bone implants
- Creators
- Amit M. Sharma
- Contributors
- Amit Bandyopadhyay (Degree Supervisor)Susmita Bose (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Mechanical and Materials Engineering, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900524859701842
- Language
- English
- Resource Type
- Thesis