Paper presented at Bangalore INDIA BIO 2011 Conference.
Multiwalled Carbon Nanotubes Reinforced Hydroxyapatite-Chitosan Composite Coating on Ti Metal: Corrosion and Mechanical Properties
Article first published online: 10 APR 2012
© 2012 The American Ceramic Society
Journal of the American Ceramic Society
Special Issue: BIO 2011
Volume 95, Issue 9, pages 2725–2731, September 2012
How to Cite
Rath, P. C., Singh, B. P., Besra, L., Bhattacharjee, S. (2012), Multiwalled Carbon Nanotubes Reinforced Hydroxyapatite-Chitosan Composite Coating on Ti Metal: Corrosion and Mechanical Properties. Journal of the American Ceramic Society, 95: 2725–2731. doi: 10.1111/j.1551-2916.2012.05195.x
- Issue published online: 3 SEP 2012
- Article first published online: 10 APR 2012
- Manuscript Accepted: 7 MAR 2012
- Manuscript Received: 29 SEP 2011
- Council of Scientific & Industrial Research (CSIR)
Multiwalled carbon nanotubes (MWCNT) reinforced Hydroxyapatite-chitosan composite coating is developed on Titanium metal by single step Electrophoretic deposition (EPD). By suitably controlling EPD process parameters, it has been possible to co-deposit MWCNT and hydroxyapatite (HAp) electrophoretically and chitosan electrochemically on Ti metal from acetic acid/water/ethanol mixed solvent containing dissolved chitosan. At optimized process parameters, the coating contains uniform incorporation of MWCNT in porous HAp-chitosan matrix, having composition of 10–12 wt% chitosan, 10–15 wt% MWCNT, rest HAp, as determined by thermogravimetric analysis. Raman spectra of composite coating reveal almost unaffected characteristics of carbon nanotubes. Adhesion strength and microhardness of composite HAp-chitosan-MWCNT coating increases compared with HAp coating. Composite coating is found to be highly corrosion resistance with corrosion current at 9 nA/cm2. The apatite growth after immersion in simulated body fluid for 10 days shows that the composite HAp-chitosan-MWCNT coating is bioactive in nature.