纯钛表面载银微弧氧化陶瓷膜的制备及性能

将微弧氧化和水热处理相结合,在纯钛表面制备载银微弧氧化陶瓷膜,改善其润湿性及耐蚀性,并赋予抗菌性。采用扫描电子显微镜(SEM)、能谱分析(EDS)、X射线衍射(XRD)、X射线光电子能谱分析(XPS)对微弧氧化陶瓷膜层进行表征,通过接触角测试评价膜层亲水性,采用电化学测试对膜层耐蚀性进行评价,抗菌性实验分析膜层抗菌性。结果表明:载银微弧氧化陶瓷膜的表面形貌仍为火山多孔结构,纳米级Ag颗粒均匀分布在微孔周围。载银微弧氧化陶瓷膜的表面主要为TiO2和纳米Ag颗粒。载银微弧氧化陶瓷膜的亲水性比纯钛的亲水性高77.0%,比微弧氧化陶瓷膜的高68.2%。与纯钛相比,载银微弧氧化陶瓷膜的自腐蚀电位提高了0.44 V,与微弧氧化相比增加了0.31 V。微弧氧化陶瓷膜的抗菌率为32.2%,载银微弧氧化陶瓷膜的抗菌率大于99.9%。

Preparation and properties of Ag-carrying micro-arc oxidation ceramic film on pure titanium surface

Ag-carrying micro-arc oxidation ceramic film was prepared on the surface of pure titanium by combining micro-arc oxidation and hydrothermal treatment to improve its wettability,corrosion resistance and impart antibacterial properties.The MAO film was characterized by scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS).The hydrophilicity of the film was evaluated by contact angle test.The corrosion resistance of the film was evaluated by electrochemical test,and the antibacterial property was analyzed by the antibacterial property test.The results show that the surface morphology of Ag-carrying MAO film remains volcanic porous structure.Nano-scale Ag particles are evenly distributed around the pores.The surface of Ag-carrying MAO film is mainly TiO2 and nano-Ag particles.The hydrophilicity of the Ag-carrying MAO film is 77.0%higher than that of pure titanium,and 68.2%higher than that of MAO film.The self-corrosion potential of Ag-carrying MAO film increases by 0.44 V and 0.31 V compared with pure titanium and MAO film.The antibacterial rate of MAO film is 32.2%.The antibacterial rate of Ag-carrying micro-arc oxidation MAO film is more than 99.9%and has excellent antibacterial property.