A study of calcium carbonate/multiwalled-carbon nanotubesichitosan composite coatings on Ti-6Al-4V alloy for orthopedic implants

作者：Ahmed Rasha A; Fekry Amany M; Farghali R A

来源：Applied Surface Science, 2013, 285: 309-316.

DOI：10.1016/j.apsusc.2013.08.056

• Carbon nanotube
• Chitosan
• Calcium carbonate
• Electrochemical impedance

In an attempt to increase the stability, bioactivity and corrosion resistance of Ti-6Al-4V alloy, chitosan (CS) biocomposite coatings reinforced with multiwalled-carbon nanotubes (MWCNTs), and calcium carbonate (CaCO3) for surface modification were utilized by electroless deposition. Scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR) reveals the formation of a compact and highly crosslinked coatings. Electrochemical techniques were used to investigate the coats stability and resistivity for orthopedic implants in simulated body fluid (SBF). The results show that E-st value is more positive in the following order: CaCO3/MWCNTs/CS %26gt; CS/MWCNTs %26gt; CS %26gt; MWCNTs. The calculated i(corr) was 0.02 nA cm(-2) for CaCO3/MWCNTs/CS which suggested a high corrosion resistance.

• 出版日期2013-11-15