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Mophology Character of the Sol-gel Derived Bioactive Glass in SBF Solution
Zhang Xiaokai*1, Liu Wei2, Chen Xiaofeng3
1.Department of Physics,Shandong Normal University,Jinan 250014;2.Department of Chemistry,Shandong Normal University,Jinan 250014;3.Institute of Biomaterials,College of Materials Science and Engineering,South China University of Technology,Guangzhou 510640
Abstract:
The sol-gel derived bioactive glass in the system CaO-P2O5 -SiO2 was prepared using sol-gel technology and the porous bioactive material as bone defects filler and bone tissue engineering scaffold was made from the solgel bioactive glass powder through sintering. The crystalline phases,microstructure and bioactiviity of the sintered porous material was investigated using XRD、SEM and FTIR techniques and in vitro method. It was indicated that a few Ca5(PO4)2SiO4 ( 5CPS)crystals had been formed in the porous material during sintering at 800℃ for 5 min. In the simulated body fluid(SBF),as the reaction progressed,the originally formed amorphous-phosphorus compound on the surface of glass mineralized hydroxy-carbonate-apatite(HCA)nanometer cluster,and interfused mutually until the HCA covering was formed. HCA crystallites only formed on the glass-phase. No HCA crystal was formed on the surface of 5CPS.
Key words:  Sol-gel,Bioactive glass,Simulated body fluid(SBF),Hydroxy-cabonate-apatite(HCA)
FundProject:
溶胶-凝胶生物活性玻璃在SBF中反应的形貌特征
张晓凯*1, 刘玮2, 陈晓峰3
1.山东师范大学,物理系电镜室,济南,250014;2.山东师范大学化学化工与材料科学学院,济南,250014;3.华南理工大学材料学院生物材料研究所,广州,510640
摘要:
利用溶胶-凝胶生物活性玻璃粉末二次烧结工艺,制备了CaO-P2O5-SiO2系统溶胶-凝胶生物玻璃,并以其为原料制备了用于骨修复及骨组织工程支架的块状多孔生物活性材料.并应用体外实验(in vitro)方法和XRD、 SEM、 FTIR技术研究了此烧结材料的显微形貌、晶相、和生物活性.结果表明,经800℃烧结5 min后,材料有硅磷酸钙(Ca5(PO4)2SiO4, 5CPS)析出,在模拟体液(SBF)中浸泡,随着时间的增长,玻璃表面最初形成的无定形钙磷化合物矿化成碳酸羟基磷灰石(HCA)纳米团簇,并逐渐
关键词:  溶胶-凝胶  生物活性玻璃  模拟体液(SBF)  碳酸羟基磷灰石(HCA)
DOI:10.1088/1674-0068/17/4/495-498
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