SiO_2气凝胶/中间相沥青基泡沫炭复合材料的制备与表征  

Preparation and characterization of silica aerogel/mesophase pitch derived carbon foam

作　　者：史亚春[1] 李铁虎[1] 王习林[1] 刘和光[1] 吕婧[1] 张智广[1] 

机构地区：[1]西北工业大学材料学院,陕西西安710072

出　　处：《功能材料》2013年第20期3049-3052,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51172184)

摘　　要：以正硅酸乙酯、乙醇和去离子水为原料,采用溶胶-凝胶法制备了SiO2溶胶;并以煤沥青为原料,采用自挥发发泡法制备了中间相沥青基泡沫炭。然后采用浸渍工艺将SiO2溶胶和中间相沥青基泡沫炭在常压下进行复合,制备了SiO2气凝胶/中间相沥青基泡沫炭复合隔热材料。利用XRD、SEM、热导仪和万能试验机等设备分别研究了SiO2气凝胶、中间相沥青基泡沫炭以及SiO2气凝胶/中间相沥青基泡沫炭复合材料的结构和性能。结果表明,所制备的复合材料具有一定的力学性能,同时其隔热性能优于单一泡沫炭的隔热性能,有望成为一种新型的隔热材料。Silica sol was synthetized via sol-gel method by TEOS and ethanol, while mesophase derived carbon foam was prepared via spontaneous foaming method from coal tar pitch as precursor. Then silica aerogel/me- sophase derived carbon foam composite was obtained by immersion process at ambient pressure. The silica aero- gel, mesophase derived carbon foam and silica aerogel/mesophase derived carbon foam composite were charac- terized by XRD, SEM, thermal-detector and universal testing machine. The results indicated that the aerogel/ mesophase derived carbon foam composite showed good mechanical perfermance, and its thermal insulation property was better than single mesophase derived carbon foam. Potentially the silica aerogel/msophase derived carbon foam composite was expected to be applied as a novel thermal insulation material.

关 键 词：中间相沥青基泡沫炭 SIO2气凝胶 隔热材料 

分 类 号：TB332[一般工业技术—材料科学与工程]