本研究采用四水硝酸钙(Ca(NO3)2·4H2O)和磷酸氢二铵((NH4)2HPO4)分别作为钙源和磷源,以丙酰胺为pH调节剂调控溶液的过饱和度,以柠檬酸钠为钙源缓释剂调控羟基磷灰石(Hydroxyapatite,HA)的形貌,经水热法处理成功制备出高结晶度、形貌均一和分散性良好的HA微球.采用X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)和扫描电镜(SEM)对反应产物进行了表征,研究了初始pH值、柠檬酸钠加入量和水热反应温度对HA结晶度、组成及形貌的影响.研究结果表明,当初始pH值为3,柠檬酸钠与钙源的摩尔比为1∶1.5,反应温度为180℃时,有利于HA微球的形成.
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