纳米生物活性玻璃颗粒的制备及形态控制

Preparation and morphology control of the nanoscale bioactive glass particles

采用溶胶-凝胶技术制备纳米生物活性玻璃颗粒,通过在溶胶中加入柠檬酸来控制生物活性玻璃的形态结构。利用比表面积分析仪、透射电子显微镜和扫描电子显微镜对纳米生物活性玻璃的结构和形成机制进行了表征。研究结果表明:采用柠檬酸作为水解催化剂可以方便地控制生物活性玻璃的纳米结构形态,有利于制备较小粒径、大比表面积和孔体积的生物活性玻璃。这种制备技术提供了一种简单、低成本制备纳米生物活性玻璃并控制其纳米粒子形态的方法。

In this paper,nanoscale bioactive glass particles with different morphologies were prepared through adding citric acid in a sol-gel process.The structure of as-prepared samples was characterized using specific surface area analysis apparatus、 SEM and TEM.The results indicate that just using citric acid as hydrolysis catalyst can easily control the nanostructure and morphology of bioactive glass and is in favor of preparing the bioactive glass with smaller particle size,larger specific surface area and pore volume.This procedure can serve a simple mean with low cost to produce nanoscale bioactive glass and control its morphology.