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Graphene Coatings for Biomedical Implants
Published on: March 1, 2013
A new material with atomized cobalt-multiwalled carbon nanotubes: a possible substitute for human implants
Bharat Joshi1, Sachin Gupta, Nitin Kalra
1Center For Materials Science and Engineering, Rochester Institute of Technology, Rochester, NY 14623, USA.
Journal of Nanoscience and Nanotechnology
|April 2, 2010
Summary
A novel cobalt-multiwalled carbon nanotube material shows promise for long-lasting implants. This advanced material offers superior corrosion resistance, potentially replacing cobalt-chromium alloys in load-bearing applications.
Area of Science:
- Materials Science
- Nanotechnology
- Biomedical Engineering
Background:
- Cobalt-chromium alloys are standard for load-bearing implants.
- There is a need for improved biocompatible and durable materials for medical implants.
Purpose of the Study:
- To synthesize and characterize a new cobalt-multiwalled carbon nanotube composite material.
- To evaluate the material's potential as a substitute for cobalt-chromium alloys in orthopedic and dental implants.
Main Methods:
- Material synthesis via atomization.
- Characterization using thermogravimetric analysis and polarization studies.
- Corrosion resistance evaluation through detailed measurements.
Main Results:
- The cobalt was found to be confined within the carbon nanotube matrix, preventing thermal oxidation.
- Density functional calculations indicate strong hybridization between cobalt atoms and carbon nanotubes.
- Corrosion measurements predict lifetimes of 31-79 years for material thicknesses of 0.8-2 mm.
Conclusions:
- The cobalt-multiwalled carbon nanotube composite exhibits excellent corrosion resistance and stability.
- This new material demonstrates significant potential to replace cobalt-chromium alloys in load-bearing implant applications.
- The findings suggest a durable and effective alternative for patients requiring knee or dental implants.
