摘要
以无机锂盐(LiCl)的醇溶液为前驱体,聚丙烯酸(PAA)既作为分散剂又为凝胶引导剂,环氧丙烷为凝胶促进剂,采用溶胶-凝胶工艺制备了块状锂基醇凝胶,经CO2超临界流体干燥工艺,得到白色锂基气凝胶块体样品,其密度约为150 g/m3。用透射电镜(TEM)对气凝胶的微观结构进行分析表明,气凝胶样品由线性骨架构成网络结构。结合红外光谱分析及XPS测试结果分析可知,样品中主要含有锂、碳元素。由BET测试结果可知,样品比表面积达18.9 m2/g。
Monolithic lithium-based aerogels were prepared by polyacrylic acid （PAA） and propylene oxide （PO） via the dispersed inorganic sol-gel method and drying with CO2 supercritical fluid dry process. The density of the prepared sample is about 150 g/m^3. The microstructure of the lithium-based aerogels was characterized by TEM, IR, XPS and BET. The results show that the material mainly contains Li, C and O elements. BET surface area is up to 18. 9 m^2/g.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2008年第B09期21-25,共5页
Atomic Energy Science and Technology
基金
国家高技术资助项目
上海市教委科研创新项目(08zz22)
关键词
聚丙烯酸
环氧丙烷
锂基气凝胶
polyacrylic acid
propylene oxide
lithium-based aerogels
