Simultaneous improvements in conversion and properties of molecularly controlled CNT fibres

Fibres of ultralong and aligned carbon nanotubes (CNT) have axial properties above reference engineering materials, proving to be exceptional materials for application in structural composites, energy storage and other devices. For CNT fibres produced by direct spinning from floating catalyst chemic...

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Detalhes bibliográficos
Autores: Mikhalchan, Anastasiia, Vila, María, Arévalo, Luis, Vilatela, Juan José
Formato: artículo
Fecha de publicación:2021
País:España
Recursos:Universidad Rey Juan Carlos
Repositorio:BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
OAI Identifier:oai:burjcdigital.urjc.es:10115/27582
Acesso em linha:https://hdl.handle.net/10115/27582
Access Level:acceso embargado
Palavra-chave:Carbon nanotube fibres
Floating catalyst
chemical vapor deposition
Carbon conversion
Tensile properties
Electrical conductivity
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spelling Simultaneous improvements in conversion and properties of molecularly controlled CNT fibresMikhalchan, AnastasiiaVila, MaríaArévalo, LuisVilatela, Juan JoséCarbon nanotube fibresFloating catalystchemical vapor depositionCarbon conversionTensile propertiesElectrical conductivityFibres of ultralong and aligned carbon nanotubes (CNT) have axial properties above reference engineering materials, proving to be exceptional materials for application in structural composites, energy storage and other devices. For CNT fibres produced by direct spinning from floating catalyst chemical vapor deposition (FCCVD), a scaled-up method, the challenge is to simultaneously achieve high process conversion and high-performance properties. This work presents a parametric study of the CNT fibre spinning process by establishing the relation between synthesis conditions, molecular composition (i.e. CNT type), fibre mechanical and electrical properties, and conversion. It demonstrates tensile properties (strength 2.1 ± 0.13 N/tex, modulus 107 ± 7 N/tex) above some carbon fibres, combined with carbon conversion about 5%, significantly above literature on similar materials. The combined improvement in conversion and properties is obtained by conducing the reaction at high temperature (1300 °C), using toluene as a carbon source, and through adjustment of the promotor to carbon ratio (S/C) to favor formation of few-layer, collapsed CNTs that maximize packing at relatively high conversions. Lower S/C ratios produce low-defect single-wall CNT, but weaker fibres. An increase in electrical conductivity to 3 × 105 S/m is also observed, with the data suggesting a correlation with longitudinal modulus.Elsevier202320232021info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10115/27582reponame:BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlosinstname:Universidad Rey Juan CarlosInglésinfo:eu-repo/semantics/embargoedAccessoai:burjcdigital.urjc.es:10115/275822026-06-24T12:48:17Z
dc.title.none.fl_str_mv Simultaneous improvements in conversion and properties of molecularly controlled CNT fibres
title Simultaneous improvements in conversion and properties of molecularly controlled CNT fibres
spellingShingle Simultaneous improvements in conversion and properties of molecularly controlled CNT fibres
Mikhalchan, Anastasiia
Carbon nanotube fibres
Floating catalyst
chemical vapor deposition
Carbon conversion
Tensile properties
Electrical conductivity
title_short Simultaneous improvements in conversion and properties of molecularly controlled CNT fibres
title_full Simultaneous improvements in conversion and properties of molecularly controlled CNT fibres
title_fullStr Simultaneous improvements in conversion and properties of molecularly controlled CNT fibres
title_full_unstemmed Simultaneous improvements in conversion and properties of molecularly controlled CNT fibres
title_sort Simultaneous improvements in conversion and properties of molecularly controlled CNT fibres
dc.creator.none.fl_str_mv Mikhalchan, Anastasiia
Vila, María
Arévalo, Luis
Vilatela, Juan José
author Mikhalchan, Anastasiia
author_facet Mikhalchan, Anastasiia
Vila, María
Arévalo, Luis
Vilatela, Juan José
author_role author
author2 Vila, María
Arévalo, Luis
Vilatela, Juan José
author2_role author
author
author
dc.subject.none.fl_str_mv Carbon nanotube fibres
Floating catalyst
chemical vapor deposition
Carbon conversion
Tensile properties
Electrical conductivity
topic Carbon nanotube fibres
Floating catalyst
chemical vapor deposition
Carbon conversion
Tensile properties
Electrical conductivity
description Fibres of ultralong and aligned carbon nanotubes (CNT) have axial properties above reference engineering materials, proving to be exceptional materials for application in structural composites, energy storage and other devices. For CNT fibres produced by direct spinning from floating catalyst chemical vapor deposition (FCCVD), a scaled-up method, the challenge is to simultaneously achieve high process conversion and high-performance properties. This work presents a parametric study of the CNT fibre spinning process by establishing the relation between synthesis conditions, molecular composition (i.e. CNT type), fibre mechanical and electrical properties, and conversion. It demonstrates tensile properties (strength 2.1 ± 0.13 N/tex, modulus 107 ± 7 N/tex) above some carbon fibres, combined with carbon conversion about 5%, significantly above literature on similar materials. The combined improvement in conversion and properties is obtained by conducing the reaction at high temperature (1300 °C), using toluene as a carbon source, and through adjustment of the promotor to carbon ratio (S/C) to favor formation of few-layer, collapsed CNTs that maximize packing at relatively high conversions. Lower S/C ratios produce low-defect single-wall CNT, but weaker fibres. An increase in electrical conductivity to 3 × 105 S/m is also observed, with the data suggesting a correlation with longitudinal modulus.
publishDate 2021
dc.date.none.fl_str_mv 2021
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10115/27582
url https://hdl.handle.net/10115/27582
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/embargoedAccess
eu_rights_str_mv embargoedAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
instname:Universidad Rey Juan Carlos
instname_str Universidad Rey Juan Carlos
reponame_str BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
collection BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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