PVP为模板控制合成纳米羟基磷灰石及其机理

Controlled synthesis of nano-hydroxyapatite using polyvinylpyrrolidone as a template

采用聚乙烯吡咯烷酮(PVP)为模板剂仿生合成了纳米羟基磷灰石(nHAP),并通过控制PVP的添加量合成出长棒、短棒和球形的nHAP。通过XRD、FTIR、TG-DTA和TEM分别对nHAP的晶相、化学组成、热稳定性和形貌进行分析。研究表明,PVP与nHAP之间存在较强的化学键合,且合成nHAP的形貌随PVP的添加量而改变,nHAP的结晶度随PVP添加量的增大而降低;最后通过化学键及配位理论对PVP合成过程中控制nHAP颗粒形貌的机理进行了探讨。

Long rod-like, short rod-like and spherical nano-hydroxyapatite（HAP） was controlled synthesized using polyvinylpyrrolidone（PVP） as a template. The obtained hydroxyapatite was investigated by X-ray diffraction（XRD）, Fourier-transform infrared spectroscopy （ FTIR）, thermogravimetric-differential thermal analysis （TG-DTA） and transmission electron microscopy（TEM）. The experimental results showed that the crystallinity of HAP decreased with the incresing of contents of PVP,and a strong chemical bonding exists between the PVP molecules and HAP. Furthermore, mechanisms of PVP in controlling the shape and size distribution of HAP were proposed.