碱液处理诱导钛合金基体表面沉积磷灰石层

Apatite Formation Induced by Alkaline Treatment on Titanium Alloy Substrate

摘要:

改变碱液处理条件和基体材料，考察了这些参数对钛合金诱导磷灰石能力的影响。结果表明：经过碱液处理钛合金表面形成了多孔网状，带负电荷的二氧化钛水凝胶层，在过饱和的模拟体液中可沉积出骨状磷灰石层；随碱液浓度、温度和处理时间境加，凝胶层的孔径和厚度增加，诱导形成磷灰石的能力增强；不同基体材料的诱导能力为：Ｔｉ〉ＴＣ４，Ｔｉ７５〉ＴｉＺｒ。太合金碱液处理后可在模拟体液中沉积出磷灰石层，因此碱液处理使钛合金表

Abstract:

The effects of alkali treatment on the deposition of apatite on various titanium alloy substrates have been studied. The results show that a porous titanium dioxide hydrogel layer with negative charge forms on the substrate during alkali treatment, and the gel layer can induce apatite formation in the simulated body fluid(SBF). The pore diameter, gel thickness and the induction ability of the gel layer increase with the concentration, temperature and treating time of the alkaline solution. The induction abilities of the various substrate materials decreases according to Ti>TC4, Ti75>TiZr. It is concluded the titanium alloys treated by alkali can induce apatite formation in SBF, and are bioactive.