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https://hdl.handle.net/1822/82830
Título: | Thermoelectric properties of polypropylene carbon nanofiber melt-mixed composites: exploring the role of polymer on their Seebeck coefficient |
Autor(es): | Paleo, Antonio J. Krause, Beate Cerqueira, M. F. Melle-Franco, Manuel Pötschke, Petra Rocha, A. M. |
Data: | 2021 |
Editora: | Springer Nature |
Revista: | Polymer Journal |
Citação: | Paleo, A.J., Krause, B., Cerqueira, M.F. et al. Thermoelectric properties of polypropylene carbon nanofiber melt-mixed composites: exploring the role of polymer on their Seebeck coefficient. Polym J 53, 1145–1152 (2021). https://doi.org/10.1038/s41428-021-00518-7 |
Resumo(s): | The effect of polypropylene (PP) on the Seebeck coefficient (S) of carbon nanofibers (CNFs) in melt-extruded PP composites filled with up to 5 wt. % of CNFs was analyzed in this study. The as-received CNFs present an electrical conductivity of ~320 S m−1 and an interesting phenomenon of showing negative S-values of −5.5 μVK−1, with 10−2 µW/mK2 as the power factor (PF). In contrast, the PP/CNF composites with 5 wt. % of CNFs showed lower conductivities of ~50 S m−1, less negative S-values of −3.8 μVK−1, and a PF of 7 × 10−4 µW/mK2. In particular, the change in the Seebeck coefficient of the PP/CNF composites is explained by a slight electron donation from the outer layers of the CNFs to the PP molecules, which could reduce the S-values of the as-received CNFs. Our study indicates that even insulating polymers such as PP may have a quantifiable effect on the intrinsic Seebeck coefficient of carbon-based nanostructures, and this fact should also be taken into consideration to tailor conductive polymer composites with the desired thermoelectric (TE) properties. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/82830 |
DOI: | 10.1038/s41428-021-00518-7 |
ISSN: | 0032-3896 |
e-ISSN: | 1349-054 |
Versão da editora: | https://www.nature.com/articles/s41428-021-00518-7 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | DET/2C2T - Artigos em revistas internacionais com arbitragem científica |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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paleo2021.pdf | 815,68 kB | Adobe PDF | Ver/Abrir |