Abstract
Silicon Substituted Hydroxyapatite (Si-HA) coatings were prepared on titanium substrates by electrophoretic deposition (EPD). The stability of Si-HA suspension in n-butanol and chloroform mixture has been studied by electricity conductivity and sedimentation test. The microstructure, shear strength and bioactivity in vitro has been tested. The stability of Si-HA suspension containing n-butanol and chloroform mixture as medium is better than that of pure n-butanol as medium. The good adhesion of the particles with the substrate and good cohesion between the particles were obtained in n-butanol and chloroform mixture. Adding triethanolamine (TEA) as additive into the suspension is in favor of the formation of uniform and compact Si-HA coatings on the titanium substrates by EPD. The shear strength of the coatings can reach 20.43 MPa after sintering at 700 °C for 2 h, when the volume ratio of n-butanol: chloroform is 2:1 and the concentration of TEA is 15 ml/L. Titanium substrates etched in H2O2/NH3 solution help to improve the shear strength of the coatings. After immersion in simulated body fluid for 7 days, Si-HA coatings have the ability to induce the bone-like apatite formation.
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The authors would like to thanks National Nature Science Foundation of China (30600149), the science research foundation of ministry of Health & United Fujian Provincial Health and Education Project for Tackling the Key Research, P.R. China (WKJ 2005-2-008), Fujian Development and Reform Commission of China (No. 2004[477]) and Fujian Education Project (No.JA050197).
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Xiao, X.F., Liu, R.F. & Tang, X.L. Electrophoretic deposition of silicon substituted hydroxyapatite coatings from n-butanol–chloroform mixture. J Mater Sci: Mater Med 19, 175–182 (2008). https://doi.org/10.1007/s10856-007-0161-y
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DOI: https://doi.org/10.1007/s10856-007-0161-y