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Gels 2016, 2(1), 4; doi:10.3390/gels2010004

Synthesis of Porous and Mechanically Compliant Carbon Aerogels Using Conductive and Structural Additives

1
I + D Department, Nanoquimia S.L., 14014 Córdoba, Spain
2
Campus Universitario, IUTA, Universidad de Oviedo, 33203 Gijón, Spain
3
Lab Química Inorgánica, University Cordoba, Campus de Rabanales, 14071 Córdoba, Spain
4
ADPOR Group, Instituto Nacional del Carbón (INCAR, CSIC), Oviedo 33001, Spain
*
Authors to whom correspondence should be addressed.
Academic Editor: Francoise Quignard
Received: 26 November 2015 / Revised: 4 January 2016 / Accepted: 8 January 2016 / Published: 15 January 2016
(This article belongs to the Special Issue Aerogels)
View Full-Text   |   Download PDF [3329 KB, uploaded 15 January 2016]   |  

Abstract

We report the synthesis of conductive and mechanically compliant monolithic carbon aerogels prepared by sol-gel polycondensation of melamine-resorcinol-formaldehyde (MRF) mixtures by incorporating diatomite and carbon black additives. The resulting aerogels composites displayed a well-developed porous structure, confirming that the polymerization of the precursors is not impeded in the presence of either additive. The aerogels retained the porous structure after etching off the siliceous additive, indicating adequate cross-linking of the MRF reactants. However, the presence of diatomite caused a significant fall in the pore volumes, accompanied by coarsening of the average pore size (predominance of large mesopores and macropores). The diatomite also prevented structural shrinkage and deformation of the as-prepared monoliths upon densification by carbonization, even after removal of the siliceous framework. The rigid pristine aerogels became more flexible upon incorporation of the diatomite, favoring implementation of binderless monolithic aerogel electrodes. View Full-Text
Keywords: carbon aerogels; nanoporous; electrically conductive; mechanical properties carbon aerogels; nanoporous; electrically conductive; mechanical properties
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Macias, C.; Rasines, G.; García, T.E.; Zafra, M.C.; Lavela, P.; Tirado, J.L.; Ania, C.O. Synthesis of Porous and Mechanically Compliant Carbon Aerogels Using Conductive and Structural Additives. Gels 2016, 2, 4.

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