Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/82817
Registo completo
Campo DC | Valor | Idioma |
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dc.contributor.author | Samir, Zineb | por |
dc.contributor.author | Paleo, Antonio J. | por |
dc.contributor.author | Aribou, Najoia | por |
dc.contributor.author | Nioua, Yassine | por |
dc.contributor.author | Silva, Jaime Oliveira da | por |
dc.contributor.author | Cerqueira, M. F. | por |
dc.contributor.author | Moreira, Joaquim Agostinho | por |
dc.contributor.author | Achour, Mohammed E. | por |
dc.date.accessioned | 2023-02-22T11:15:31Z | - |
dc.date.available | 2023-02-22T11:15:31Z | - |
dc.date.issued | 2022 | - |
dc.identifier.citation | Samir, Z.; Paleo, A.J.; Aribou, N.; Nioua, Y.; da Silva, J.O.; Cerqueira, M.F.; Moreira, J.A.; Achour, M.E. Dielectric Spectroscopy of Melt-Mixed Polypropylene and Pyrolytically Stripped Carbon Nanofiber Composites. J. Compos. Sci. 2022, 6, 368. https://doi.org/10.3390/jcs6120368 | por |
dc.identifier.issn | 2504-477X | por |
dc.identifier.uri | https://hdl.handle.net/1822/82817 | - |
dc.description.abstract | In this work, pyrolytically stripped carbon nanofiber (CNF) polypropylene (PP) composites were synthesized following a scalable melt-mixing method, and the effects of CNF weight concentrations on the electrical conductivity, dielectric permittivity, electrical modulus and electrical impedance of PP/CNF composites were studied. Quite unexpectedly, the electrical conductivity of PP/CNF composites improved only slightly as the incorporation of CNFs was raised, yielding a maximum of ~10−10 S m−1 for PP/CNF 5 wt. % composites. The increase corresponded to a gradual improvement of the dielectric constant up to a maximum of ~9 for PP/CNF 5 wt. % composites at 1 MHz, which was attributed to the raise of interface polarization effect. Moreover, the Cole–Cole model was used to analyze the effects of CNF concentrations on the dielectric relaxation of PP/CNF composites, from which was deduced that the incorporation of CNFs increases their dielectric strength and relaxation times. The analysis gathered here aims to provide a better insight into the enhanced dielectric properties observed in low-conducting polymer composites filled with CNFs. | por |
dc.description.sponsorship | A. J. Paleo gratefully acknowledges support from FCT-Foundation for Science and Technology by the project UID/CTM/00264/2021 of 2C2T under the COMPETE and FCT/MCTES (PIDDAC) co-financed by FEDER through the PT2020 program and “plurianual” 2020–2023 Project UIDB/00264/2020. | por |
dc.language.iso | eng | por |
dc.publisher | Multidisciplinary Digital Publishing Institute (MDPI) | por |
dc.relation | UID/CTM/00264/2021 | por |
dc.relation | info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00264%2F2020/PT | por |
dc.rights | openAccess | por |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | por |
dc.subject | Carbon nanofibers | por |
dc.subject | Polypropylene | por |
dc.subject | Electrical conductivity | por |
dc.subject | Dielectric permittivity | por |
dc.subject | Electrical modulus | por |
dc.subject | Electrical impedance | por |
dc.title | Dielectric spectroscopy of melt-mixed polypropylene and pyrolytically stripped carbon nanofiber composites | por |
dc.type | article | por |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | https://www.mdpi.com/2504-477X/6/12/368 | por |
oaire.citationStartPage | 1 | por |
oaire.citationEndPage | 13 | por |
oaire.citationIssue | 12 | por |
oaire.citationVolume | 6 | por |
dc.identifier.eissn | 2504-477X | por |
dc.identifier.doi | 10.3390/jcs6120368 | por |
dc.subject.fos | Engenharia e Tecnologia::Engenharia dos Materiais | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Journal of Composites Science | por |
oaire.version | VoR | por |
dc.identifier.articlenumber | 368 | por |
Aparece nas coleções: | PHYSICS OF QUANTUM MATERIALS AND BIONANOSTRUCTURES (2018 - ...) DET/2C2T - Artigos em revistas internacionais com arbitragem científica |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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jcs-06-00368.pdf | 3,37 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons