Artículo
Reinforced silica-carbon nanotube monolithic aerogels synthesised by rapid controlled gelation
Autor/es | Piñero de los Ríos, Manuel
Mesa Díaz, María del Mar Santos Martínez, Desirée de los Reyes Peces, María Virtudes Díaz Fraile, José Antonio Rosa Fox, Nicolás de la Esquivias Fedriani, Luis María Morales Flórez, Víctor |
Departamento | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2018 |
Fecha de depósito | 2020-03-27 |
Publicado en |
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Resumen | This work introduces a new synthesis procedure for obtaining homogeneous silica hybrid aerogels with carbon nanotube contents up to 2.50 wt.%. The inclusion of nanotubes in the highly porous silica matrix was performed by ... This work introduces a new synthesis procedure for obtaining homogeneous silica hybrid aerogels with carbon nanotube contents up to 2.50 wt.%. The inclusion of nanotubes in the highly porous silica matrix was performed by a two-step sol–gel process, resulting in samples with densities below 80 mg/cm3. The structural analyses (N2 physisorption and SEM) revealed the hierarchical structure of the porous matrix formed by nanoparticles arranged in clusters of 100 and 300 nm in size, specific surface areas around 600 m2/g and porous volumes above 4.0 cm3/g. In addition, a relevant increase on the mechanical performance was found, and an increment of 50% for the compressive strength and 90% for the maximum deformation were measured by uniaxial compression. This reinforcement was possible thanks to the outstanding dispersion of the CNT within the silica matrix and the formation of Si–O–C bridges between nanotubes and silica matrix, as suggested by FTIR. Therefore, the original synthesis procedure introduced in this work allows the fabrication of highly porous hybrid materials loaded with carbon nanotubes homogeneously distributed in the space, which remain available for a variety of technological applications. |
Cita | Piñero de los Ríos, M., Mesa Díaz, M.d.M., De los Santos Martínez, D., Reyes Peces, M.V., Díaz Fraile, J.A., Rosa Fox, N.d.l.,...,Morales Flórez, V. (2018). Reinforced silica-carbon nanotube monolithic aerogels synthesised by rapid controlled gelation. Journal of Sol-Gel Science and Technology, 86 (2), 391-399. |
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