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Characterization of sol-gel derived silver/fluor-hydroxyapatite composite coatings on titanium substrate

Batebi, K ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1016/j.surfcoat.2018.08.021
  3. Publisher: Elsevier B.V , 2018
  4. Abstract:
  5. A composite coating containing silver, fluoride and hydroxyapatite (Ag-FHA) was developed on titanium substrate by sol-gel method. Triethylphosphite, hydrated calcium nitrate, ammonium fluoride and silver nitrate were used respectively, as P, Ca, F and Ag precursors with a Ca:P ratio 1.67 and concentration of silver was 0.3 wt%. Coatings were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and atomic absorption spectrometry (AAS). Potentiodynamic polarization measurements in simulated body fluid proved corrosion protection caused by both Ag-FHA coatings. Antibacterial activity of coatings against Escherichia coli indicated a significant enhancement in the antibacterial property of Ag-FHA nanocomposite with increasing the amount of fluoride. These coatings can prevent the bacterial infections of implants. © 2018
  6. Keywords:
  7. Antibacterial ; Coating ; Fluoride ; Hydroxyapatite ; Silver ; Absorption spectroscopy ; Atomic absorption spectrometry ; Coatings ; Corrosion resistant coatings ; Enamels ; Escherichia coli ; Field emission microscopes ; Fluorine compounds ; Fourier transform infrared spectroscopy ; Hydroxyapatite ; Nitrates ; Scanning electron microscopy ; Silver ; Silver halides ; Sol-gel process ; Sol-gels ; Titanium ; Anti-bacterial activity ; Antibacterial ; Antibacterial properties ; Bacterial infections ; Field emission scanning electron microscopy ; Fluoride ; Potentiodynamic polarization measurements ; Simulated body fluids ; Composite coatings
  8. Source: Surface and Coatings Technology ; Volume 352 , 2018 , Pages 522-528 ; 02578972 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0257897218308351