Communication Dans Un Congrès Année : 2024

Electrically conductive polymer composites

Thibaut Lalire
Claire Longuet
A. Taguet

Résumé

With the rise of the electrification of our uses, particularly in the field of transport, more and more devices must be lightweight, mechanically resistant, integrated into the structure, and have properties such as specific electrical conductivity ranging from dissipative materials (to evacuate electrostatic charges) to materials for electromagnetic shielding. While dispersing modified graphene nanoplatelets into polymer blends it is possible to reach interesting electrical conductivity [1,2]. Figure 1 shows that a modified GOxH-r-PMMA graphene (a graphene oxidized then reduced then grafted with PMMA copolymer) dispersed in a co-continuous blend based on PS and PMMA can reach an electrical conductivity of more than 10-3 S/cm. Recently, different biochars were characterized to measure their intrinsic electrical conductivities. A biochar obtained by pyrolysis of chestnut at 700°C and activated by CO2, such as a biochar obtained from the pyrolysis of birch at 450°C and activated by CO2 exhibit an electrical conductivity in the same range as that of a KNG 180 graphene (i.e. between 1 and 3 S/cm). Hence biochar particles seem to be good candidates to be dispersed in polymeric media to reach dissipative materials or materials for electromagnetic shielding.

Domaines

Matériaux
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Dates et versions

hal-04902638 , version 1 (21-01-2025)

Identifiants

  • HAL Id : hal-04902638 , version 1

Citer

Thibaut Lalire, Belkacem Otazaghine, Claire Longuet, Anatoli Serghei, A. Taguet. Electrically conductive polymer composites. 1eres journées du GDR MultiPODE - Multifunctional nanostructured POlymer systems by DEsign, Sep 2024, Sofia Antipolis, France. ⟨hal-04902638⟩
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