POROUS STRUCTURE OF ORGANIC AND CARBON AEROGELS SYNTHESIZED BY SOL-GEL POLYCONDENSATION OF RESORCINOL WITH FORMALDEHYDE间苯二酚与甲醛溶胶-凝胶缩聚制备有机碳气凝胶的多孔结构.pdf

Carbon Vol. 35, No. 6, pp. 791-796, 1997 Copyright 0 1997 ElsevierScienceLtd Pergamon Printed in Great Britain.All rights reserved 0008-6223/97$17.00+ 0.00 PII: SOOO%6223(97)00024-9 POROUS STRUCTURE OF ORGANIC AND CARBON AEROGELS SYNTHESIZED BY SOL-GEL POLYCONDENSATION OF RESORCINOL WITH FORMALDEHYDE H. TAMON,* H. ISHIZAKA, M. MIKAMI and M. OKAZAKI Department of Chemical Engineering, Kyoto University, Kyoto 606-01, Japan (Received 10 September 1996; accepted in revised form 13 December 1996) Abstract-Organic aerogels were synthesized via the sol-gel polycondensation of resorcinol with formalde- hyde in a slightly basic aqueous solution and followed by supercritical drying with carbon dioxide. As a result of characterization by nitrogen adsorption, the resorcinol-formaldehyde (RF) aerogels were mesoporous materials with high surface areas and had few micropores. The surface area of the RF