Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/82718
Registo completo
Campo DC | Valor | Idioma |
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dc.contributor.author | Paleo, Antonio J. | por |
dc.contributor.author | Krause, Beate | por |
dc.contributor.author | Soares, Delfim | por |
dc.contributor.author | Melle-Franco, Manuel | por |
dc.contributor.author | Muñoz, Enrique | por |
dc.contributor.author | Pötschke, Petra | por |
dc.contributor.author | Rocha, A. M. | por |
dc.date.accessioned | 2023-02-16T11:19:44Z | - |
dc.date.available | 2023-02-16T11:19:44Z | - |
dc.date.issued | 2022-11-08 | - |
dc.identifier.citation | Paleo, A.J.; Krause, B.; Soares, D.; Melle-Franco, M.; Muñoz, E.; Pötschke, P.; Rocha, A.M. Thermoelectric Properties of N-Type Poly (Ether Ether Ketone)/Carbon Nanofiber Melt-Processed Composites. Polymers 2022, 14, 4803. https://doi.org/10.3390/polym14224803 | por |
dc.identifier.uri | https://hdl.handle.net/1822/82718 | - |
dc.description.abstract | The thermoelectric properties, at temperatures from 30 °C to 100 °C, of melt-processed poly(ether ether ketone) (PEEK) composites prepared with 10 wt.% of carbon nanofibers (CNFs) are discussed in this work. At 30 °C, the PEEK/CNF composites show an electrical conductivity (σ) of ~27 S m<sup>−1</sup> and a Seebeck coefficient (S) of −3.4 μV K<sup>−1</sup>, which means that their majority charge carriers are electrons. The origin of this negative Seebeck is deduced because of the impurities present in the as-received CNFs, which may cause sharply varying and localized states at approximately 0.086 eV above the Fermi energy level (E<sub>F</sub>) of CNFs. Moreover, the lower S, in absolute value, found in PEEK/CNF composites, when compared with the S of as-received CNFs (−5.3 μV K<sup>−1</sup>), is attributed to a slight electron withdrawing from the external layers of CNFs by the PEEK matrix. At temperatures from 30 °C to 100 °C, the σ (T) of PEEK/CNF composites, in contrast to the σ (T) of as-received CNFs, shows a negative temperature effect, understood through the 3D variable-range hopping (VRH) model, as a thermally activated hopping mechanism across a random network of potential wells. Moreover, their nonlinear S (T) follows the same behavior reported before for polypropylene composites melt-processed with similar CNFs at the same interval of temperatures. | 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) cofinanced by FEDER through the PT2020 program and “plurianual” 2020–2023 Project UIDB/00264/2020. E. Muñoz acknowledges financial support from ANID Anillo ACT/192023 and Fondecyt No 1190361. M. Melle-Franco acknowledges support from the project IF/00894/2015 and within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MEC (PIDDAC). | 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.relation | info:eu-repo/grantAgreement/FCT/Investigador FCT/IF%2F00894%2F2015%2FCP1302%2FCT0024/PT | por |
dc.relation | info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50011%2F2020/PT | por |
dc.relation | info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50011%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 | Poly(ether ether ketone) | por |
dc.subject | Conductive polymer composites | por |
dc.subject | Seebeck coefficient | por |
dc.subject | Variable-range hopping | por |
dc.subject | Electronic doping | por |
dc.title | Thermoelectric properties of n-type poly (ether ether ketone)/carbon nanofiber melt-processed composites | por |
dc.type | article | por |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | https://www.mdpi.com/2073-4360/14/22/4803 | por |
oaire.citationStartPage | 1 | por |
oaire.citationEndPage | 15 | por |
oaire.citationIssue | 22 | por |
oaire.citationVolume | 14 | por |
dc.date.updated | 2022-11-24T14:44:13Z | - |
dc.identifier.eissn | 2073-4360 | - |
dc.identifier.doi | 10.3390/polym14224803 | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Polymers | por |
oaire.version | VoR | por |
dc.identifier.articlenumber | 4803 | por |
Aparece nas coleções: | DET/2C2T - Artigos em revistas internacionais com arbitragem científica |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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polymers-14-04803-v2.pdf | 3,41 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons