Carbon nanotube/Insulating polymer composites for thermoelectric applications

Brun, Jean-Francois; Vo Le, Van Hau; Binet, Corinne; Tahon, Jean-Francois; Morel, Thibaut; Barrau, Sophie; Gaucher, Valerie

Type de document :

Autre communication scientifique (congrès sans actes - poster - séminaire...): Communication dans un congrès sans actes

URL permanente :

http://hdl.handle.net/20.500.12210/119077

Titre :

Carbon nanotube/Insulating polymer composites for thermoelectric applications

Auteur(s) :

Brun, Jean-Francois [Auteur]

Unité Matériaux et Transformations (UMET) - UMR 8207
Vo Le, Van Hau [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Binet, Corinne [Auteur]

Unité Matériaux et Transformations (UMET) - UMR 8207
Tahon, Jean-Francois [Auteur]

Unité Matériaux et Transformations (UMET) - UMR 8207
Morel, Thibaut [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Unité Matériaux et Transformations - UMR 8207 [UMET]
Barrau, Sophie [Auteur]

Unité Matériaux et Transformations - UMR 8207 [UMET]
Gaucher, Valerie [Auteur]

Unité Matériaux et Transformations (UMET) - UMR 8207

Titre de la manifestation scientifique :

Journées nationales de thermoélectricité

Ville :

Strasbourg

Pays :

France

Date de début de la manifestation scientifique :

2024-11-20

Discipline(s) HAL :

Chimie/Matériaux
Chimie/Polymères

Résumé en anglais : [en]

Over the last decade, composite organic semiconductors based on carbon nanotubes dispersed into an insulating polymer matrix have attracted growing interest among thermoelectric materials to implement flexible-organic ...
Lire la suite >Over the last decade, composite organic semiconductors based on carbon nanotubes dispersed into an insulating polymer matrix have attracted growing interest among thermoelectric materials to implement flexible-organic thermoelectric generators (f-OTEG) for low temperature (T < 400 K) applications. As many organic materials, they offer a low intrinsic thermal conductivity, ease of processing, light weight, flexibility and a lower cost than their inorganic counterparts, but their thermoelectric figure of merit ZT= (σS^2)/(κ ) T remains low, mainly due to a low Seebeck coefficient. However a decoupling between the power factor σS^2 and the thermal conductivity is possible, which offers very promising routes for optimization, but requires a better understanding of the structure-property relationships. In this talk, results on insulating polymer matrix based composites, filled with various concentrations of carbon nanotubes (from 2 wt% up to 40 wt%) and elaborated with two different processes (melt blending and solution mixing) will be presented. Three matrices, namely Polyvinylidene fluoride (PVDF), poly(vinylidene fluoride-trifluoroethylene) P(VDF-TrFE) and polylactic acid (PLA) were used. Several types of carbon nanotubes were selected: multi-walled carbon nanotubes (MWCNT), single-walled carbon nanotubes (SWCNT) and functionalized single-walled carbon nanotubes (SWCNT-COOH). Two kinds of samples were prepared i) thick films around 500 µm thick, obtained after thermo-compression, and ii) thin films, around 10 µm thick, obtained by drop-casting from the solution mixing process. In the case of thick films, the room temperature figure of merit ZT was calculated after measuring the electrical conductivity by dielectric spectroscopy, the Seebeck coefficient by an in-house built device and the thermal conductivity by Light Flash Analysis (LFA). The ZT of thin films was measured, from room temperature up to 400 K, by the Linseis Thin Film Analyser (TFA), in which the electrical conductivity is measured by the Van der Pauw method and the thermal conductivity by the 3omega method. The dispersion of the nanotubes was assessed by scanning electron microscopy (SEM) and the structure of the samples by X-ray diffraction (XRD). The highest ZT value obtained in this study is 0.02 at 300 K and 0.04 at 400 K, for thin films of PLA filled with 40 wt% of SWCNT. These values are the best values that can be found in the literature regarding carbon nanotube/insulating thermoplastic composites.Lire moins >

Langue :

Anglais

Comité de lecture :

Non

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
INRAE
ENSCL

Collections :

Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Ingénierie des Systèmes Polymères

Date de dépôt :

2024-12-05T13:33:49Z
2024-12-05T13:39:09Z
2024-12-06T10:16:52Z
2024-12-09T16:39:53Z

Historique des modifications

Numéro de version	Lien	Date de modification
4	20.500.12210/119077*	2024-12-07T10:14:01Z
3	20.500.12210/119077.3	2024-12-06T10:15:56Z
2	20.500.12210/119077.2	2024-12-05T13:38:33Z
1	20.500.12210/119077.1	2024-12-05T13:33:49Z

*Version sélectionnée

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