摘要:
以纯钛金属为基体,采用阳极氧化法在钛基体表面原位生长TiO2纳米氧化层,采用溶胶凝胶法在TiO2纳米氧化层表面涂覆生物活性微晶玻璃涂层(BGC)。通过扫描电镜(SEM)、X射线衍射仪(XRD)、涂层附着划痕试验、人体体液模拟试验,分析BGC涂层的形貌和物相,评价涂层的生物活性,研究不同摩尔分数的CaF2对涂层结合力的影响规律。结果表明:引入TiO2微纳米氧化层后,材料表面的接触角变小,亲水能力提高,钛基体与涂层之间的结合力提高了27%左右;当CaF2摩尔分数为4%时,钛基体与涂层之间的结合力最大为64 N;Ti/TiO2/BGC复合材料在模拟体液中浸泡7 d后,材料表面生成大量的羟基磷灰石。
Abstract:
Nano-TiO2 layer was prepared by in-situ growth on pure titanium matrix via anodic oxidation method,then the bioactive glass coating（BGC） was clad on the nano-TiO2 layer through sol-gel method.Employing SEM,XRD,scratch test and human body fluid simulation test,the morphology and phase,biological activity of the coating were studied and evaluated respectively.Furthermore,the effect of CaF2 molar fraction on bonding force of the coating was also investigated.The results show that after introduction of nano-TiO2 layer the contact angle of the titanium matrix surface decreases with the hydrophilic ability increased,resulting 27% of rise for the binding force between the coating and titanium matrix.The maximum binding force between the coating and titanium is determined at 64 N when the CaF2 content is 4%.After soaking in the simulated body fluid for 7 days,abundant hydroxyapatite can be generated on the surface of Ti/TiO2/BGC composite.
点击查看大图
下载:
