Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (2): 20210644.doi: 10.7503/cjcu20210644

• Article: Inorganic Chemistry • Previous Articles     Next Articles

Preparation and in vitro Bioactivity of HA/CuO/SrCO3 Gradiently Composite Coating

ZHAO Mengyang, HUANG Ziyang()   

  1. College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007,China
  • Received:2021-09-06 Online:2022-02-10 Published:2021-10-13
  • Contact: HUANG Ziyang E-mail:zyhuang@fjnu.edu.cn
  • Supported by:
    the Natural Science Foundation of Fujian Province, China(2018J01750)

Abstract:

In hydroxyapatite(HA) suspension, n-butanol as dispersion medium, triethanolamine as emulsifier, two osteogenic trace element compounds CuO and SrCO3 as additives, Ti sheet as substrate, chitosan(CS) as porogen, an HA/CS/CuO/SrCO3 composite coating was obtained by zonal electrophoresis distribution and electrophoretic deposition under the action of reverse electric field. And then, an HA/CuO/SrCO3 composite coating was prepared after high temperature calcination at 700 ℃ for 2 h. Some equipments and methods such as powder X-ray diffraction(XRD), Fourier transform infrared spectroscopy(FTIR), field emission scanning electron microscopy(FESEM), energy dispersive spectroscopy(EDS), Lloyd universal material testing machine, electrochemical workstation, culture in simulated body fluid and inhibition experiment, were used to test and characterize the composite coatings. The results show that all of the contents of Ca, Cu and Sr elements had presented a gradient distribution in the radial direction of the HA/CuO/SrCO3 composite coating. The bonding strength between the composite coating and the Ti substrate was 33.0 MPa. The composite coating possessed stable electrochemical performance and strong corrosion resistance in (N-(2-hydroxyethyl)piperazine)-N'-2-ethane sulfonic acid(HEPES) simulated body fluids(H-SBF) under tested by cyclic voltammetry(CV) curves and Tafel polarization curves. The surface of the composite coating was apatite-carbonated completely after cultured in H-SBF for 24 d. The inhibition rates of the composite coating powder against Escherichia coli and Staphylococcus aureus were 81.82% and 71.86%, respectively.

Key words: HA/CuO/SrCO3 gradiently composite coating, In vitro bioactivity, Zonal electrophoresis distribution, Electrophoretic deposition

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