authors |
Paleo, AJ; Krause, B; Cerqueira, MF; Melle-Franco, M; Potschke, P; Rocha, AM |
nationality |
International |
journal |
POLYMER JOURNAL |
keywords |
N-TYPE; P-TYPE; CONDUCTIVITY; NANOTUBES; PERFORMANCE; FABRICATION; POWER |
abstract |
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 similar to 320 S m(-1) and an interesting phenomenon of showing negative S-values of -5.5 mu VK-1, with 10(-2) mu W/mK(2) as the power factor (PF). In contrast, the PP/CNF composites with 5 wt. % of CNFs showed lower conductivities of similar to 50 S m(-1), less negative S-values of -3.8 mu VK-1, and a PF of 7 x 10(-4) mu W/mK(2). 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. |
publisher |
SPRINGERNATURE |
issn |
0032-3896 |
isbn |
1349-0540 |
year published |
2021 |
volume |
53 |
issue |
10 |
beginning page |
1145 |
ending page |
1152 |
digital object identifier (doi) |
10.1038/s41428-021-00518-7 |
web of science category |
8 |
subject category |
Polymer Science |
unique article identifier |
WOS:000663986000001
|
ciceco authors
impact metrics
journal analysis (jcr 2019):
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journal impact factor |
2.826 |
5 year journal impact factor |
2.247 |
category normalized journal impact factor percentile |
70.225 |
dimensions (citation analysis):
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altmetrics (social interaction):
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