Electrophoretic deposition of bioactive glass-nanoclay nanocomposites on titanium

Abstract Nanopowders of 45 s5 bioactive glass were synthesized by simple sol-gel technique. The powder was characterized for their microstructure and morphology. X-ray diffraction (XRD) pattern of the synthesized powder showed no reflections. The electron micrograph showed an agglomerated particle distribution with an average hydrodynamic particle size of 450 nm. Nanocomposite bioactive glass – nanoclay was prepared by physical mixing, which were then coated onto titanium substrates by electrophoretic deposition. The coatings were characterized for their morphology. The XRD pattern confirmed the presence of nanoclay in the coating. The scanning electron microscopy (SEM) images showed a densification of the coatings as the concentration of nanoclay was increased in the nanocomposites. The corrosion resistance of the nanocomposite coatings was studied in simulated body fluid. The charge transfer resistance increased from 9 × 103 Ω for uncoated substrates to 2.8 × 105 Ω for nanocomposite coatings. Potentiometric polarization studies also showed a similar trend, showing consistency in the electrochemical analysis.