钛合金表面TiO_2薄膜制备及生物活性研究

TiO_2 films growth on titanium alloy and it's in vitro bioactivity

使用TiCl_3盐酸溶液作为前驱液,通过简单易操作的水热法在Ti-6Al-4V合金基体表面原位生长TiO_2纳米棒阵列薄膜。使用扫描电子显微镜(SEM)、场发射电子显微镜(FESEM)和X射线衍射仪(XRD)等手段研究不同水热反应条件对其表面形貌和结构的影响。结果表明:纳米棒阵列薄膜为混晶结构,具有沿[001]轴择优生长和金红石(101)高能晶面曝露的特点,并且能够适用于3D打印的多孔钛合金种植体,说明了该薄膜具有一定的普适性。该基体表面的TiO_2在3d就能诱导羟基磷灰石的生长,说明其具有优异的生物活性,显示了其在骨科、牙科等植入体表面改性领域的应用前景。

The titanium trichloride(TiCl3)was used as the precursor,and titania nanorod films were highly ordered grew on Ti-6Al-4 Valloy substrate via a facile hydrothermal method.The morphology and crystal structure of titania film were characterized by scanning electron microscopy(SEM),field-emission electron microscope(FESEM)and X-ray diffraction(XRD).The results demonstrated that the as-deposited titania film was mischcrystal,with rutile highenergy(101)facet exposed.It was preferential grew along [001]orientation,which was perpendicular to the surface.Moreover,the hydrothermal method can also be adopted in 3D printing titanium alloy implant.The apatite would grow on the as-treated implant after immersion in simulated body fluid(SBF)for 3 days,which has good vitro bioactivity and great potential for application in surface modification of orthopedics and dental implants.