Electrophoretic Deposition and Characterization of Chitosan/45S5 Bioactive Glass Composite Coatings on Porous Titanium for Biomedical Applications

Abstract:

Porous titanium samples of cp Ti grade IV were obtained by space-holder technique (50%vol of NH₄HCO₃, 800 MPa, 1250 oC during 2h in high vacuum), producing a good balance between stiffness and mechanical strength. The samples were coated with chitosan/45S5 bioactive glass composite by electrophoretic deposition. Homogeneity, infiltration efficiency, and coatings integrity (cracking and adhesion) were evaluated in order to establish correlations with processing parameters. SEM, FTIR, and contact profilometry were performed for detailed characterization of the coatings; and micro-mechanical properties (P-h curves and scratch testing) were set-up as well. Optimum EPD parameters were 25V, 7 min and suspension containing 0.5 g/L chitosan and 1.5 g/L BG a titanium structure with pore sizes greater than 200 μm are required.

• Periodical: Key Engineering Materials (Volume 654)
• Pages: 189-194
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.654.189
• Online since: July 2015
• Authors: S. Borjas*, E.J. Gil, L. Cordero, J.J. Pavón, J.A. Rodriguez-Ortiz, Aldo Roberto Boccaccini, Y. Torres
• Keywords: Biomaterials, Electrophoretic Deposition (EPD), Osteointegration, Porous Titanium, Stress Shielding

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