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Nanocomposites with p- and n-type conductivity controlled by type and content of nanotubes in thermosets for thermoelectric applications
Citation Link: https://doi.org/10.15480/882.2819
Publikationstyp
Journal Article
Publikationsdatum
2020-06-10
Sprache
English
TORE-URI
Enthalten in
Volume
10
Issue
6
Article Number
1144
Citation
Nanomaterials 10 (6): 1144 (2020)
Publisher DOI
Scopus ID
Publisher
Multidisciplinary Digital Publishing Institute
In this work, composites based on epoxy resin and various carbon nanotubes (CNTs) were studied regarding their thermoelectric properties. The epoxy composites were prepared by infiltration of preformed CNT buckypapers. The influence of different types of CNTs on the Seebeck coefficient was investigated, namely lab-made and commercially available multi walled carbon nanotubes (MWCNTs), lab-made nitrogen doped MWCNTs (N-MWCNT) and commercially available single walled carbon nanotubes (SWCNTs). It was found that only by varying the lab-made MWCNT content could both n- and p-type composites be produced with Seebeck coefficients between −9.5 and 3.1 µV/K. The incorporation of N-MWCNTs resulted in negative Seebeck coefficients of −11.4 to −17.4 µV/K. Thus, the Seebeck coefficient of pure SWCNT changed from 37.4 to −25.5 µV/K in the epoxy/1 wt. % SWCNT composite. A possible explanation for the shift in the Seebeck coefficient is the change of the CNTs Fermi level depending on the number of epoxy molecules on the CNT surface.
Schlagworte
epoxy
carbon nanotubes
thermoelectric
Seebeck coefficient
power factor
DDC Class
540: Chemie
620: Ingenieurwissenschaften
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nanomaterials-10-01144.pdf
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