溶胶-凝胶生物活性玻璃的纳米结构分析研究  

Nano-Structure Analysis of the Sol-Gel Derived Bioactive Glasses

作　　者：陈晓峰[1] 李玉莉[1] 赵娜如[1] 

机构地区：[1]华南理工大学材料科学与工程学院生物材料研究所特种功能材料及其制备新技术教育部重点实验室,广州510640

出　　处：《硅酸盐通报》2007年第2期247-251,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(50672028;50472054);广东省自然科学基金(05006587;04205786);国家973项目(2005CB623902);广州市科技计划项目(2003Z1-D0021)

摘　　要：利用溶胶-凝胶低温合成法制备了CaO-P2O5-SiO2系统生物活性玻璃骨修复及骨组织工程材料。利用SEM、BET及XRD等方法对溶胶-凝胶生物活性玻璃的微观结构及其组成对材料微观结构的影响进行了分析,并同目前已临床应用的45S5生物活性玻璃进行了比较。研究发现由溶胶-凝胶法制备的生物活性玻璃是由纳米级微球构成,其高比表面积是由其纳米微球之间的孔隙所致。这种高比表面积对于提高材料的表面吸附能力及生物矿化功能具有重要作用。根据等大球体最紧密堆积原理建立了溶胶-凝胶生物活性玻璃纳米孔隙尺寸近似计算模型,并对其孔隙结构进行了分析计算。The new type of amorphous biomaterials synthesized via sol-gel method. The sol-gel derived in system CaO-P2Os-SiO2 with high bioactivity was biomaterials can be applied to bone reparation and bone tissue engineering scaffolds. The effect of the composition of the sol-gel derived bioactive glass on the microstructure of the materials were investigated in detail by using SEM, BET and XRD techniques, compared with 45S5 bioactive glass which has been applied to clinic. It was observed by SEM that the sol-gel bioactive glass is composed of countless nano-sized ＂beads＂ which connected one another to form a nano-structure. This structure can result in a great amount of nano-sized micro-pores and a huge special counting model of nano-sized micro-pores of the sol-gel bioactive glass was estabilshed, and also, the micro-pores structure of the sol-gel derived glasses were analyzed.

关 键 词：生物活性玻璃 比表面积 纳米结构 溶胶-凝胶 

分 类 号：TQ171.4[化学工程—玻璃工业]