DBPapers
DOI: 10.5593/sgem2017/61/S24.025

INVESTIGATION OF SILICA-CARBON COMPOSITES PRODUCED FROM SILICA-FORMALDEHYDE-RESORCINOL AEROGELS

M. Gordienko, I. Makarova, P. Tsygankov, N. Menshutina, T. Konkova
Tuesday 12 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7408-12-6 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 61, 187-194 pp, DOI: 10.5593/sgem2017/61/S24.025

ABSTRACT

In this work, the organic silicon-based composites were obtained from resorcinol, formaldehyde, TEOS, N-(b-aminoethyl)-g-aminopropyl-trimethoxysilane (AEAPTES) as initial materials for carbon-silica composites producing. The solvent was acetone, those molar ratio to resorcinol varied in following: sample S1 - 1:11; sample S2 - 1:14 and sample S3 - 1:19. Gels were prepared by one-stage method. The silica-organic gels were supper-critical dried. It was shown that the heat treatment of silica-organic gels allows getting silica-organic gels with bigger surface area and total pore volume. The resulting samples were subjected to pyrolysis in a nitrogen atmosphere at 700 °C for 3 hours. It should be noted that in the pyrolysis of samples of significant shrinkage occurred. The loss of volume was 30-40 %. The textural parameters of carbon-organic composites influence on the textural parameters of a carbon–silica aerogel composites.

Keywords: silica-carbon composites, silica-formaldehyde-resorcinol aerogels, pyrolysis