碳气凝胶的制备及结构  

Preparation and Structural Changes of Carbon Aerogels

作　　者：郭志军 朱红[2] 张新卫[1] 

机构地区：[1]北京交通大学理学院,北京100044 [2]北京化工大学理学院,北京100029

出　　处：《北京交通大学学报》2010年第6期103-106,共4页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金资助项目(50674006);国家自然科学基金重点项目资助(20636060);国际科技合作项目资助(2006DFA61240)

摘　　要：以甲醛和间苯二酚溶胶凝胶制备有机气凝胶(OA),将有机气凝胶在半密封的情况下干燥,再在高温下碳化,制备得到碳气凝胶(CA),并分析了有机气凝胶的形成机理.通过红外(IR)、透射电镜(TEM)、X射线衍射(XRD)等考察了有机气凝胶到碳气凝胶的结构变化,从具有丰富的官能团结构的有机物,最后碳化得到具有纳米尺度、无序的、连续三维网络结构的碳材料.In this work,organic aerogels were prepared by sol-gel polycondensation of resorcinol and formaldehyde using sodium carbonate as a catalyst and dried under a semi-sealed condition at ambient pressure.Carbon aerogels were obtained by the dried organic aerogels carbonized under a nitrogen atmosphere at high temperature.The forming mechanism of organic aerogels has been analyzed.The structures of the organic aerogels and the carbon aerogels obtained were investigated by FT-infrared spectroscopy,X-ray diffraction（XRD）and transmission electron microscopy.The results showed the carbon aerogels have typical three-dimensional continuous disorder nano-network.

关 键 词：溶胶-凝胶 有机气凝胶 碳气凝胶 碳化 

分 类 号：TQ127.1[化学工程—无机化工]