基于纳米羟基磷灰石溶胶的nHA/PA66复合粉体制备与表征

本文开发了一种新的制备纳米羟基磷灰石(nHA)/聚酰胺66(PA66)复合材料的方法。先用明胶包覆nHA棒状颗粒，再将其制备成以N，N-二甲基乙酰胺和甘油的混合液为溶剂的稳定溶胶。当nHA溶胶与PA66溶液混合时，相同的酰胺基团保证了二者之间良好的共混相容性，成功制备了nHA/PA66复合材料。X射线衍射(XRD)、傅立叶红外光谱分析(FTIR)、透射电镜(TEM)、扫描电镜-能谱分析(SEM-EDS)以及差热分析(DTA)和热重分析(TG)等表征了产物的形貌、结构及成分分布。结果表明：明胶对nHA颗粒具有显著的化学包覆作用，使nHA溶胶与PA66溶液得以均匀混合，均匀分布在PA66基体中，二者以氢键结合为一体。

Preparation and Characterization of nHA/PA66 Composite Based on the Hydroxyapatite Sol

This work developed a novel process for preparing nano hydroxyapatite (nHA)/polyamide66 (PA66) composite. The HA nanorods were coated by Gelatin first, and then dissolved them in the solvent mixed glycerol and N,N-dimethylacetamide. A stable sol of nHA was consequently prepared. Due to the Gelatin coated on the surface of nHA contains amide groups to be as the same as PA66, they have good compatibility in the mixture of HA sol and PA66 solution, which resulted in synthesizing nHA/PA66 composite successfully. The morphology, structure and component analysis of composite have been studied using various techniques, such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy(FTIR), transmission electron microscopy (TEM), scanning electron microscopy with energy spectrum analysis (SEM-EDS), differential thermal analysis (DTA) and thermal gravimetric analysis (TGA). The results showed that the Gelatin layer firmly coated on the hydroxyapatite nanorods, which would benefit the uniform and good compatibility of both nHA sol and PA66 solution. nHA distributed in PA66 matrix uniformly, they combined through hydrogen bonds.