中文摘要：

采用电化学阳极氧化法在钛金属表面制备了具有不同管径尺寸的TiO2纳米管阵列（TiOznano-tubearray，TNT）涂层。实验中通过模拟体液（simu1atedbodyfluid，SBF）浸泡法制备了纳米羟基磷灰石（nanohydroxyapatite，nHA）／TNT复合涂层，并研究了nHA在纳米管表面生成的过程和机理。Ti-OH基团是HA在TNT表面成核的诱因，TiO2与HA晶体构成的晶格匹配结构能够促进HA的成核速率，锐钛矿和金红石混合相的TNT涂层诱导nHA生成的能力明显强于无定型的TNT涂层。涂层的润湿性受控于纳米管的管径尺寸，并能够影响nHA形成的速率，增强纳米管的亲水性有利于HA的沉积。

英文摘要：

The TiO2 nanotube array （TNT） coatings with different caliber growing perpendicular to the titanium surface were prepared by electrochemical anodized method. The nHA/TNT composite coatings were fabricated by soaking in simulated body fluid （SBF）. The forming process and mechanism were studied in this paper. Ti OH functional group was the inducement of the nHA nucleary on the TNT. The matching structure be- tween TiO2 and nHA could improve the nucleation rate of the nHA, the tubes with biphase mixed by anatase and rutile clearly induce nHA growth more efficient than that in their amorphous. The wettability of TNT was controlled by the caliber, and influenced the rate of nHA formation. The results indicated that enhancing the hydrophily of TNT could help to deposit nHA.