Multiwalled Carbon Nanotubes Reinforced Hydroxyapatite-Chitosan Composite Coating on Ti Metal: Corrosion and Mechanical Properties

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) electrophoretica...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2012-09, Vol.95 (9), p.2725-2731
Main Authors: Rath, Purna Chandra, Singh, Bimal P., Besra, Laxmidhar, Bhattacharjee, Sarama
Format: Article
Language:English
Subjects:
Chemical vapor deposition
Chitosan
Coating
Composite coatings
Corrosion resistance
Ethyl alcohol
Hydroxyapatite
Nanotubes
Process parameters
Protective coatings
Thermogravimetric analysis
Titanium
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Summary: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.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2012.05195.x