Journal
CARBON
Volume 49, Issue 8, Pages 2773-2784Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2011.03.007
Keywords
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Funding
- CPER
- Conseil General des Vosges
- Region Lorraine
- DRRT
- FNADT
- FEDER
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Tannin-formaldehyde carbon aerogels were prepared based on organic gels obtained by sol-gel polymerisation of tannin with formaldehyde that have been dried with supercritical acetone and pyrolysed at 900 degrees C. Tannins drastically reduce the cost of the gels, typically by a factor five, and polymerise in a wide range of pHs, leading to porous carbonaceous materials whose mesopore fraction ranges from 57% to 78%. The surface area and the total porosity can be as high as 715 m(2) g(-1) and 95%, respectively. Pore volumes and micro-mesopore-size distributions are similar to those of much more expensive carbon aerogels derived from resorcinol-formaldehyde resin. However, more easily adjustable pore textures may be obtained using tannins as precursors. (C) 2011 Elsevier Ltd. All rights reserved.
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