钛涂覆多孔羟基磷灰石/氧化铝生物陶瓷涂层的性能研究  

Surface Modification of Titanium by Hydroxyapatite/Al_2O_3 Porous Bioceramic Coating

作　　者：张岚[1,2] 

机构地区：[1]闽西职业技术学院环境工程系 [2]闽西职业技术学院环保技术服务平台,福建龙岩364021

出　　处：《合成材料老化与应用》2017年第1期18-21,27,共5页Synthetic Materials Aging and Application

基　　金：福建省龙岩市科技局资助项目(No:2015LY06)

摘　　要：通过电泳沉积的方法在生物医用钛基体表面制备羟基磷灰石(HA)/Al/壳聚糖(CS)复合涂层,通过高温烧结分解CS颗粒并制备钛基多孔HA/Al_2O_3复合生物陶瓷涂层。通过粘结-拉伸实验测定涂层与基材的结合强度;XRD和SEM对涂层的物相组成和形貌进行表征;CHI660C电化学工作站测试涂层在模拟体液中的耐蚀性能。研究表明,经过热处理后的涂层为表面可形成平均孔径为5μm的多孔HA/Al_2O_3,涂层厚度可达25μm,涂层中的HA颗粒致密粘连,Al在高温条件下反应成Al_2O_3从而使涂层与基体的结合强度最高可达30.5MPa,涂层的涂覆使Ti金属在人体模拟体液中具有良好的耐腐蚀能力。A hydroxyapatite （HA）-Al-chitosan （CS） composite bioceramic coating was widely applied to the sur- faces of pure titanium by the electrophoretic deposition （EPD） method. The mechanism of EPD of HA/AL/CS com- posites was discussed. The porous HA/Al2O3 coatings were obtained as average pore diameter of 5 μm after the heat treatments with temperatures 700℃ for 2h in air. This approach is especially attractive for the fabrication of poly- mer-ceramic composites, where CS can provide porous coating,whereas Alprovide A1203 to improve the coating ad- herence. The adhesive force between the HA/Al2O3 porous coatings and pure titanium was approximately 30. 5MPa. The porous HA/Al2o3 coatings provide improved bioactivity and biocompatibility of pure titanium in the simulated body fluid solution.

关 键 词：TI 表面改性 电泳沉积 羟基磷灰石 壳聚糖 AL2O3 多孔涂层 

分 类 号：O646.1[理学—物理化学]