层状纳米羟基磷灰石的结晶性能及形成机理

在前期利用模板剂法制备层状纳米羟基磷灰石（nano-hydroxyapatite,n-HA）的基础上,利用透射电子显微镜、X射线衍射和Fourier变换红外光谱等研究并讨论工艺参数对材料结晶性能影响以及形成机理。结果表明：反应24h后,HA晶体形成且层状结构清晰;在碱性条件下,生成的产物主要是n-HA,酸性条件下则生成CaHPO4;乙醇与水的质量比为2.0时,纳米晶体形状、大小相对均一。工艺参数的变化会影响表面活性剂的堆积参数,沿着表面活性剂模板生长的羟基磷灰石颗粒有不同的微观结构及形貌。

Crystal Properties and Formation Mechanism of Layered Nano-Crystalline of Hydroxyapatite

The nano-crystalline of hydroxyapatite (n-HA) with an ordered multi-layered structure was synthesized with a mono alkyl phosphate as a template. The effect of the condition on the microstructure and morphology was investigated via transmission electron microscopy, X-ray diffraction and Fourier transform infrared spectroscopy, respectively. The formation mechanism of the n-HA with layered structure was proposed according to the experimental results. The results showed that the nano-crystalline with the uniform structure can be formed after 24 h. The synthesized products were mainly n-HA under alkaline condition, and the products were mainly CaHPO 4 under acidic condition. The shape and size of nano-crystals were relatively homogeneous at a mass ratio of alcohol to water of 2.0. In addition, processing conditions can effect the packing parameters of the surfactants. HA crystalls growing along the surfactant modes have different microstructure and morphology.