PEG分子量对复合凝胶玻璃纳米结构的影响  

The influence of molecular weight of PEG on the nanostructure of hybrid xerogels

作　　者：刘维[1] 詹红兵[1] 陈文平[1] 肖勇[1] 

机构地区：[1]福州大学材料科学与工程学院,福建福州350108

出　　处：《福州大学学报（自然科学版）》2010年第5期742-747,共6页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省科技厅科研资助项目(2008F5030)

摘　　要：采用溶胶-凝胶工艺制备SiO2-CaO-P2O5-PEG无机/有机复合凝胶玻璃,并通过扫描电子显微镜、N2吸附-脱附实验、傅里叶转换红外光谱及X射线衍射谱对其组成、结构进行研究.实验中采用3种不同分子量的PEG(400,6000,10000),研究了分子量对复合凝胶玻璃组成、结构的影响.实验结果表明,由于PEG具有良好的水溶性,其高分子链与无机SiO2网络互穿缠绕形成稳定的凝胶玻璃结构,在SEM的观察下材料表现出优异的均一性,没有分相产生.其中,PEG分子量为6000的复合凝胶玻璃样品因其高孔隙率、高比表面积和分级的孔结构特征,有希望用于新型骨组织工程支架材料开发.We report the synthesis and characterization of a new hybrid in the P2O5 - CaO - SiO2 - poly（ ethylene glycol） （PEG） system. Three kinds of PEG with different molecular weight were used in the preparation and the influence of the molecular weights of theses PEGs on the nanostructure of the resultant hybrid xerogels were investigated. PEGs present excellent compatibility with the inorganic component based sol -gel system due to its aqueous solubility. Under scanning electron microscopy （SEM） observation, no phase separation was detected in the resultant hybrid xerogels. FT - IR spectra indicate that hybridization between the organic and iorganic part was successfully achieved at the molecular level for all the samples. SEM images and N2 adsorption - desorption experiments show that one sample （ S6 000） is the most promising candidate for a bone scaffold material, because of its hierarchical pore structure and high porosity and surface area

关 键 词：复合凝胶玻璃 PEG 骨组织工程 支架材料 

分 类 号：O632.32[理学—高分子化学]