COATINGS OF BIOLOGICAL HYDROXYAPATITE DOPED WITH MAGNESIUM AND REINFORCED WITH TIO2: SYNTHESIS AND CHARACTERIZATION

Authors

  • Astrid C. Niño Pinzón Universidad Industrial de Santander
  • Marly J. Mogollón Sarmiento Universidad Industrial de Santander
  • Próspero Acevedo Peña Universidad Industrial de Santander
  • Elcy M. Córdoba Tuta Universidad Industrial de Santander

Abstract

Bio-coatings of TiO2 and biological hydroxyapatite (HA) doped with magnesium (TiO2/HA-Mg) were deposited on AISI 316L stainless steel by dip-coating technique, from suspensions of HA-Mg powders (which were obtained by hydrothermal treatment of bovine bone in solutions of Mg(NO3)2) in TiO2 sols. Biological hydroxyapatite powders doped with Mg were characterized by XRD and FT-IR analytical techniques, in order to evaluate the compositional changes. On the other hand, the coating's characteristics were evaluated by scanning electron and optic microscopies, adhesion force to the substrate, in vitro bioactivity in SBF and corrosion resistance. The bovine bone hydrothermally treated allowed to obtain hydroxyapatite with greater reactivity due to its doping with Mg, what was confirmed throughout the electrochemical characterization of the films. The modification of HA with Mg does not significantly affect the physical and mechanical properties of the TiO 2/HA films. An increment in the bioactivity of the HA was only observed when it was modified with 10% Mg, so that during the immersion of this coating in SBF shows an initial stage of biomaterial dissolution and the subsequent stage of apatites formation on its surface.

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Author Biographies

Astrid C. Niño Pinzón, Universidad Industrial de Santander

Ingeniera Química Universidad Industrial de Santander

Marly J. Mogollón Sarmiento, Universidad Industrial de Santander

Ingeniera Química Universidad Industrial de Santander

Próspero Acevedo Peña, Universidad Industrial de Santander

Ingeniero Metalúrgico Magíster en Ingeniería de Materiales Candidato a Doctor en Ciencias, por la Universidad Autónoma Metropolitana (México).

Elcy M. Córdoba Tuta, Universidad Industrial de Santander

Profesora Escuela de Ingeniería Metalúrgica y Ciencia de Materiales Universidad Industrial de Santander Doctora en Ciencia y Tecnología de Materiales

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Published

2013-08-17

How to Cite

Niño Pinzón, A. C., Mogollón Sarmiento, M. J., Acevedo Peña, P., & Córdoba Tuta, E. M. (2013). COATINGS OF BIOLOGICAL HYDROXYAPATITE DOPED WITH MAGNESIUM AND REINFORCED WITH TIO2: SYNTHESIS AND CHARACTERIZATION. LatinAmerican Journal of Metallurgy and Materials, 240–250. Retrieved from https://www.rlmm.org/index.php/rlmm/article/view/443

Issue

2014, 34(2)

Section

Regular Articles

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