六氟磷酸对含氟羟基磷灰石薄膜形成的影响

EFFECT OF HEXAFLUOROPHOSPHORIC ACID ON THE FORMATION OF THE FLUORDATED HYDROXYAPATITE FILMS

含氟羟磷灰石薄膜在生物、抗菌和发光材料方面有着重要的应用前景。采用Ca(NO3) 2 和P2 O5的乙醇溶液为先驱体 ,六氟磷酸(HPF6 )作为氟引入剂 ,3者形成混合物 ,保持Ca与P的摩尔比为 1.67,经回流后作为涂膜液。通过浸渍涂膜法和 60 0℃热处理 ,在玻璃和钛合金基板上形成氟含量不同的含氟磷灰石薄膜。采用XRD ,XPS ,SEM ,FTIR ,紫外 -可见光谱方法对薄膜进行了表征。实验结果显示HPF6 是一种非常有效的氟引入剂 ,不仅能改变薄膜中的氟含量 。

Fluoridated hydroxyapatite films on glass and Ti alloy substrates were prepared by sol-gel technique using hexafluorophosphoric acid (HPF 6) as a fluorine-introducing reagent. Different amounts of HPF 6 were added into the mixed ethanol solutions of Ca(NO 3) 2 and P 2O 5, keeping the Ca/P molar ratio of 1.67. The mixtures with HPF 6 were refluxed to be used as dipping solutions. As_dipped films on glass and titanium alloy substrates were dried at 150 ℃ and heated at 600 ℃, fluoridated hydroxyapatite films could be formed. The films were characterized by X_ray diffraction, scanning electron microscopy, then infrared reflection spectroscopy and X_ray photoelectron spectroscopy. It is shown that HPF 6 is a very effective reagent for incorporating fluorine into apatite, and has a role in improving the microstructural homogeneity of the films.