引氟量对钦表面电沉积含氟羟基磷灰石涂层的影响

摘要

根据电沉积磷灰石陶瓷技术,通过在含有Ca(NO3)2·4H2O、NH4H2PO4、NaNO3及H2O2的电解液中加入不同浓度的氟化钠作为引氟剂,在钛片表面进行电化学沉积,分别采用扫描电镜(SEM)、X射线衍射(XRD)、傅立叶变换红外光谱(FT-IR)、X射线光电子能谱(XPS)对所得涂层的表面形貌和理化性质进行分析.结果表明,通过上述方法可以在钛表面制备纳米晶含氟羟基磷灰石(FHA)涂层,涂层的含氟量与电解液中加入NaF的浓度有关.当NaF浓度低于0.012 mol/L时,随着引氟量的增加,所得FHA涂层的含氟量也相应增加;当NaF浓度高于0.012 mol/L后,涂层的含氟量不发生明显变化.%Based on the method of electrodepositing apatite ceramics, electrodeposition was conducted with titanium as substrate in an electrolyte containing Ca(NO3)2·4H2O,NH4H2PO4, NaNO3 and H2O2 and by adding different amounts of sodium fluoride for introduction of fluorine. The coatings obtained were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy and X-ray photoelectron spectroscopy (XPS). The results showed that nanocrystalline fluoridated hydroxyapatite (FHA) coatings can be obtained by the technique. The content of fluorine in coating is related to the concentration of NaF in electrolyte, which is increased accordingly when NaF is less than 0.012 mol/L, while stays almost constant when NaF is more than 0.012 mol/L.