Structural characterization of carbon xerogels: From film to monolith

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• 作者：Sergio Morales-Torres ; ^{semoto@ugr.es} ; Francisco J. Maldonado-Hó ; dar ; Agustí ; n F. Pé ; rez-Cadenas ; Francisco Carrasco-Marí ; n
• 关键词：Carbon aerogels ; Films ; Carbon xerogels ; Monolith ; Foam
• 刊名：Microporous and Mesoporous Materials
• 出版年：2012
• 出版时间：1 May, 2012
• 年：2012
• 卷：153
• 期：Complete
• 页码：24-29
• 全文大小：1349 K

文摘

Two series of carbon materials obtained by polymerization of resorcinol and formaldehyde catalyzed respectively by Li₂CO₃ and Cs₂CO₃ were prepared in different format: aerogel pellets, xerogel pellets of different diameters, films and coatings of ceramic structures. The samples were extensively characterized by different techniques and their porous texture, morphology and mechanical properties were related with the synthesis conditions: polymerization catalyst, drying method and mainly the nature, size and shape of the mold used for the polymerization and cure of the gel. Highly mesoporous materials are obtained in pellets avoiding the supercritical drying, while films and coatings are microporous materials with a high potential as molecular sieves.