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Article

Epoxy/Glass Fiber Nanostructured p- and n-Type Thermoelectric Enabled Model Composite Interphases

Department of Materials Science & Engineering, University of Ioannina, GR-45110 Ioannina, Greece
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Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(15), 5352; https://doi.org/10.3390/app10155352
Received: 9 July 2020 / Revised: 28 July 2020 / Accepted: 29 July 2020 / Published: 3 August 2020
(This article belongs to the Special Issue Multifunctional Composite Materials)
This experimental study is associated with the modification of glass fibers with efficient, organic, functional, thermoelectrically enabled coatings. The thermoelectric (TE) behavior of the coated glass fiber tows with either inherent p semiconductor type single wall carbon nanotubes (SWCNTs) or the n-type molecular doped SWCNTs were examined within epoxy resin matrix in detail. The corresponding morphological, thermogravimetric, spectroscopic, and thermoelectric measurements were assessed in order to characterize the produced functional interphases. For the p-type model composites, the Seebeck coefficient was +16.2 μV/K which corresponds to a power factor of 0.02 μW/m∙K2 and for the n-type −28.4 μV/K which corresponds to power factor of 0.12 μW/m∙K2. The p–n junction between the model composites allowed for the fabrication of a single pair thermoelectric element generator (TEG) demonstrator. Furthermore, the stress transfer at the interphase of the coated glass fibers was studied by tow pull-out tests. The reference glass fiber tows presented the highest interfacial shear stress (IFSS) of 42.8 MPa in comparison to the p- and n-type SWCNT coated GF model composites that exhibited reduced IFSS values by 10.1% and 28.1%, respectively. View Full-Text
Keywords: Seebeck effect; model composites; SWCNTs; organic thermoelectrics; functional interphases; thermal energy harvesting Seebeck effect; model composites; SWCNTs; organic thermoelectrics; functional interphases; thermal energy harvesting
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MDPI and ACS Style

Karalis, G.; Tsirka, K.; Tzounis, L.; Mytafides, C.; Koutsotolis, L.; Paipetis, A.S. Epoxy/Glass Fiber Nanostructured p- and n-Type Thermoelectric Enabled Model Composite Interphases. Appl. Sci. 2020, 10, 5352. https://doi.org/10.3390/app10155352

AMA Style

Karalis G, Tsirka K, Tzounis L, Mytafides C, Koutsotolis L, Paipetis AS. Epoxy/Glass Fiber Nanostructured p- and n-Type Thermoelectric Enabled Model Composite Interphases. Applied Sciences. 2020; 10(15):5352. https://doi.org/10.3390/app10155352

Chicago/Turabian Style

Karalis, George, Kyriaki Tsirka, Lazaros Tzounis, Christos Mytafides, Lampros Koutsotolis, and Alkiviadis S. Paipetis 2020. "Epoxy/Glass Fiber Nanostructured p- and n-Type Thermoelectric Enabled Model Composite Interphases" Applied Sciences 10, no. 15: 5352. https://doi.org/10.3390/app10155352

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