Effects of oxidizing procedures on carbon nanofibers surface and dispersability in an epoxy resin

Different oxygen functionalities were introduced in fishbone-type carbon nanofibers (CNFs) using three different oxidation procedures. The differences between these procedures are mainly based in the oxidizing agent used and the acid medium in which the process was carried out. Potassium permanganat...

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Detalles Bibliográficos
Autores: Romero Izquierdo, Amaya, Lavín López, María del Prado, Sánchez Silva, María Luz, Valverde, Jose Luis, Patón Carrero, Antonio
Tipo de recurso: artículo
Fecha de publicación:2020
País:España
Institución:Universidad de Castilla-La Mancha
Repositorio:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/29873
Acceso en línea:http://hdl.handle.net/10578/29873
Access Level:acceso abierto
Palabra clave:Graphite
Graphene
Carbon nanofibers
Oxidation
Epoxy resin
Dispersion
Grafito
Grafeno
Nanofibras de carbono
Oxidación
Resina epoxica
Dispersión
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spelling Effects of oxidizing procedures on carbon nanofibers surface and dispersability in an epoxy resinRomero Izquierdo, AmayaLavín López, María del PradoSánchez Silva, María LuzValverde, Jose LuisPatón Carrero, AntonioGraphiteGrapheneCarbon nanofibersOxidationEpoxy resinDispersionGrafitoGrafenoNanofibras de carbonoOxidaciónResina epoxicaDispersiónDifferent oxygen functionalities were introduced in fishbone-type carbon nanofibers (CNFs) using three different oxidation procedures. The differences between these procedures are mainly based in the oxidizing agent used and the acid medium in which the process was carried out. Potassium permanganate-, ferrate- and chromate-based approaches were employed in conjunction with exfoliation and subsequent reduction with hydrazine. A complete evaluation of the effects produced by the different oxidative treatments on the resulting materials was carried out. The obtained materials were characterized by Scanning Electron Microscopy (SEM), EDX, RAMAN, Fourier Transform Infrared (FTIR), X-ray diffraction (XRD), N2 adsorption/desorption measurements, particle size and thermogravimetric analysis. The results suggest that only those procedures in which H2SO4 was used as acid medium (i.e., potassium permanganate and ferrate processes) were fit to achieve intercalation of suitable species (SO42− ions) that weaken the van der Waals forces. The weakening of these forces facilitates the attack of the carbon skeleton by the strong oxidants MnO4− or FeO42–and, as a consequence, the fragmentation of the material occurs. Dispersibility of carbon materials are affected by functional groups and oxidation degree. Turbiscan stability index provide a useful tool in order to study the stability of carbon material into different solvents with different dipole moments: water, epoxy resin and decane.Se introdujeron diferentes funcionalidades de oxígeno en nanofibras de carbono tipo espina de pescado (CNF) utilizando tres procedimientos de oxidación diferentes. Las diferencias entre estos procedimientos se basan principalmente en el agente oxidante utilizado y el medio ácido en el que se llevó a cabo el proceso. Se emplearon enfoques basados ​​en permanganato, ferrato y cromato de potasio junto con la exfoliación y la posterior reducción con hidracina. Se realizó una evaluación completa de los efectos producidos por los diferentes tratamientos oxidativos sobre los materiales resultantes. Los materiales obtenidos se caracterizaron por microscopía electrónica de barrido (SEM), EDX , RAMAN, infrarrojo transformado de Fourier (FTIR), difracción de rayos X (XRD), medidas de adsorción/desorción de N 2 , tamaño de partícula yanálisis termogravimétrico . Los resultados sugieren que solo aquellos procedimientos en los que se usó H 2 SO 4 como medio ácido (es decir, procesos de permanganato y ferrato de potasio ) fueron aptos para lograr la intercalación de especies adecuadas (iones SO 4 2− ) que debilitan las fuerzas de van der Waals. El debilitamiento de estas fuerzas facilita el ataque de la estructura carbonada por los oxidantes fuertes MnO 4 − o FeO 4 2–y, como consecuencia, se produce la fragmentación del material. La dispersabilidad de los materiales de carbono se ve afectada por los grupos funcionales y el grado de oxidación. El índice de estabilidad Turbiscan proporciona una herramienta útil para estudiar la estabilidad del material de carbono en diferentes solventes con diferentes momentos dipolares : agua, resina epoxi y decano.Elsevier202220222020info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttp://hdl.handle.net/10578/29873reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésinfo:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/298732026-05-27T07:36:41Z
dc.title.none.fl_str_mv Effects of oxidizing procedures on carbon nanofibers surface and dispersability in an epoxy resin
title Effects of oxidizing procedures on carbon nanofibers surface and dispersability in an epoxy resin
spellingShingle Effects of oxidizing procedures on carbon nanofibers surface and dispersability in an epoxy resin
Romero Izquierdo, Amaya
Graphite
Graphene
Carbon nanofibers
Oxidation
Epoxy resin
Dispersion
Grafito
Grafeno
Nanofibras de carbono
Oxidación
Resina epoxica
Dispersión
title_short Effects of oxidizing procedures on carbon nanofibers surface and dispersability in an epoxy resin
title_full Effects of oxidizing procedures on carbon nanofibers surface and dispersability in an epoxy resin
title_fullStr Effects of oxidizing procedures on carbon nanofibers surface and dispersability in an epoxy resin
title_full_unstemmed Effects of oxidizing procedures on carbon nanofibers surface and dispersability in an epoxy resin
title_sort Effects of oxidizing procedures on carbon nanofibers surface and dispersability in an epoxy resin
dc.creator.none.fl_str_mv Romero Izquierdo, Amaya
Lavín López, María del Prado
Sánchez Silva, María Luz
Valverde, Jose Luis
Patón Carrero, Antonio
author Romero Izquierdo, Amaya
author_facet Romero Izquierdo, Amaya
Lavín López, María del Prado
Sánchez Silva, María Luz
Valverde, Jose Luis
Patón Carrero, Antonio
author_role author
author2 Lavín López, María del Prado
Sánchez Silva, María Luz
Valverde, Jose Luis
Patón Carrero, Antonio
author2_role author
author
author
author
dc.subject.none.fl_str_mv Graphite
Graphene
Carbon nanofibers
Oxidation
Epoxy resin
Dispersion
Grafito
Grafeno
Nanofibras de carbono
Oxidación
Resina epoxica
Dispersión
topic Graphite
Graphene
Carbon nanofibers
Oxidation
Epoxy resin
Dispersion
Grafito
Grafeno
Nanofibras de carbono
Oxidación
Resina epoxica
Dispersión
description Different oxygen functionalities were introduced in fishbone-type carbon nanofibers (CNFs) using three different oxidation procedures. The differences between these procedures are mainly based in the oxidizing agent used and the acid medium in which the process was carried out. Potassium permanganate-, ferrate- and chromate-based approaches were employed in conjunction with exfoliation and subsequent reduction with hydrazine. A complete evaluation of the effects produced by the different oxidative treatments on the resulting materials was carried out. The obtained materials were characterized by Scanning Electron Microscopy (SEM), EDX, RAMAN, Fourier Transform Infrared (FTIR), X-ray diffraction (XRD), N2 adsorption/desorption measurements, particle size and thermogravimetric analysis. The results suggest that only those procedures in which H2SO4 was used as acid medium (i.e., potassium permanganate and ferrate processes) were fit to achieve intercalation of suitable species (SO42− ions) that weaken the van der Waals forces. The weakening of these forces facilitates the attack of the carbon skeleton by the strong oxidants MnO4− or FeO42–and, as a consequence, the fragmentation of the material occurs. Dispersibility of carbon materials are affected by functional groups and oxidation degree. Turbiscan stability index provide a useful tool in order to study the stability of carbon material into different solvents with different dipole moments: water, epoxy resin and decane.
publishDate 2020
dc.date.none.fl_str_mv 2020
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10578/29873
url http://hdl.handle.net/10578/29873
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RUIdeRA. Repositorio Institucional de la UCLM
instname:Universidad de Castilla-La Mancha
instname_str Universidad de Castilla-La Mancha
reponame_str RUIdeRA. Repositorio Institucional de la UCLM
collection RUIdeRA. Repositorio Institucional de la UCLM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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