Phosphorus functionalization for the rapid preparation of highly nanoporous submicron-diameter carbon fibers by electrospinning of lignin solutions
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Título: | Phosphorus functionalization for the rapid preparation of highly nanoporous submicron-diameter carbon fibers by electrospinning of lignin solutions |
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Autor/es: | García-Mateos, Francisco J. | Berenguer Betrián, Raúl | Valero-Romero, María José | Rodríguez-Mirasol, José | Cordero, Tomás |
Grupo/s de investigación o GITE: | Electrocatálisis y Electroquímica de Polímeros |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Física |
Palabras clave: | Carbon fibers | Lignin | Electrospinning | P surface groups | Electrodes |
Fecha de publicación: | 13-dic-2017 |
Editor: | Royal Society of Chemistry |
Cita bibliográfica: | Journal of Materials Chemistry A. 2018, 6: 1219-1233. https://doi.org/10.1039/C7TA08788H |
Resumen: | This work presents a fast and versatile method to prepare carbon fibers from lignin. It involves the production of submicron-sized phosphorus-functionalized lignin fibers in only one step by electrospinning of lignin/H3PO4 solutions. The phosphorus functionalities enable shortening of the conventional stabilization process from more than 90 h to only 2 h thus avoiding fiber fusion or even stabilizing the lignin fibers in an inert atmosphere. The incorporation of H3PO4 into the initial lignin solution produces more oxidized spun lignin fibers, due to the reaction of phosphoric acid with the dissolved lignin, generating phosphate (and/or polyphosphate) esters throughout the structure of lignin fibers. These phosphate groups seem to be responsible for the production of cross-linking reactions during the stabilization step that are, in this case, very active and effective in increasing the glass transition temperature of the lignin fibers, reducing the time needed for the stabilization step and improving this process. Moreover, they promote the chemical activation of lignin fibers and greatly increase their oxidation resistance, avoiding their complete combustion during carbonization under a low concentration of O2 at temperatures as high as 900 °C. The resulting carbon fibers gather different interesting properties, such as sub-micron diameters (≤1 μm), large surface area (≈2000 m2 g−1), relatively high performance in relation to their mechanical properties for functional applications and a rich variety of uniformly distributed O and P surface functionalities, which make them very attractive for heterogeneous catalysis, adsorption and electrochemical applications. |
Patrocinador/es: | This work was supported by the Spanish Ministry of Economy, Industry and Competitiveness (MINECO) and FEDER under CTQ2015-68654-R project. F.J.G.M. and R.B. acknowledge the assistance of the MINECO for PTA2015-11464-I and IJCI-2014-20012 contract, respectively. |
URI: | http://hdl.handle.net/10045/139718 |
ISSN: | 2050-7488 (Print) | 2050-7496 (Online) |
DOI: | 10.1039/C7TA08788H |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © Royal Society of Chemistry |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1039/C7TA08788H |
Aparece en las colecciones: | INV - GEPE - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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Garcia-Mateos_etal_2018_JMaterChemA_accepted.pdf | Accepted Manuscript (acceso abierto) | 3,03 MB | Adobe PDF | Abrir Vista previa |
Garcia-Mateos_etal_2018_JMaterChemA_final.pdf | Versión final (acceso restringido) | 2,14 MB | Adobe PDF | Abrir Solicitar una copia |
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