文献类型：期刊文献

中文题名：氧化前处理对炭气凝胶孔结构的影响

英文题名：Effect of oxidation of phenolic-furfural aerogels on pore structures of cabon aerogels

作者：张睿[1];李雯[1];胡子君[2];龙东辉[1];谢应波[1];成果[1];凌立成[1];杨俊和[3]

机构：[1]华东理工大学化学化工学院,化学工程国家重点实验室,上海200237;[2]航天材料工艺研究所,北京100076;[3]上海理工大学,材料科学与工程学院,上海200093

年份：2008

卷号：23

期号：4

起止页码：309

中文期刊名：新型炭材料

外文期刊名：New Carbon Materials

收录：CSTPCD;;EI(收录号：20090311865294);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000262122300003)】；北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：National Nature Science Foundation of China (50872033); National Science and Technology Supporting Program (2007BAE55B03) and 973 Grant (2006CB600907).

语种：中文

中文关键词：有机气凝胶;炭气凝胶;氧化处理;孔结构

外文关键词：Organic aerogels, Carbon aerogels, Oxidation; Pore structures.

摘要：在110℃～170℃范围内对糠醛-酚醛基有机气凝胶进行氧化处理1h～7h,考察了氧化对有机气凝胶热裂解产生的炭气凝胶孔结构的影响。结果表明:氧化可避免有机气凝胶纳米骨架在裂解过程中的塑性阶段发生,有机气凝胶的适度氧化有利于纳米结构的稳定化;由于空气在大、中、微孔中扩散的差别,氧化前处理对炭气凝胶的大、中、微孔有不同的影响,尤其对接近中孔的大孔影响最大。在所考察的氧化温度和时间内,130℃/7h时或150℃/3h时的适度氧化条件下,可显著提高中孔孔容、中孔比表面和BET比表面。
Organic aerogels, prepared by sol-gel polymerization of phenolic and furfural, were oxidized at 110 to 170 ℃ for 1 to 7h in air. The effect of oxidation temperature and time on the pore structure of the carbon aerogels was investigated. It is found that oxidation under appropriate conditions can stabilize a nano-network of organic aerogels during pyrolysis by preventing plasticity. However, the oxidative effect on micro-, meso- and macro-pores is quite different. A mild condition is appropriate for macro-pores while a severe condition is needed for meso- and micro-pores due to a faster diffusion of air into macro-pores than into meso- and micro-pores. The appropriate oxidation parameters for an improved mesopore volume and surface area are 130 ℃ for 7 h or 150 ℃ for 3 h in air.