Noise and Electrical Characteristics of Composites Filled with Onion-Like Carbon Nanoparticles - Université de Lorraine Accéder directement au contenu
Article Dans Une Revue Polymers Année : 2021

Noise and Electrical Characteristics of Composites Filled with Onion-Like Carbon Nanoparticles

Edita Palaimiene
Sandra Pralgauskaitė
Vanessa Fierro
Sébastien Schaefer
Alain Celzard

Résumé

Polymer matrix composites filled with carbon nanoparticles are promising materials for many applications, but their properties strongly depend on the particle features, concentration and distribution within the matrix. Here we present a study of the electrical resistivity and the low-frequency voltage fluctuation of composites based on epoxy resin filled with onion-like carbon (OLC) of different sizes (40–250 nm) above the percolation threshold, which should clarify the electrical transport characteristics in these materials. Electrical measurements were performed in the temperature range of 78 to 380 K, and voltage noise analysis was carried out from 10 Hz to 20 kHz. At low temperatures (below 250 K), thermally activated tunneling, variable-range hopping and generation–recombination of charge carriers take place. Above 250 K, the rapid expansion of the matrix with the temperature increases the resistivity, but above ~330 K, the conductivity of the matrix becomes significant. Quasi one-dimensional electrical transport is observed in composites with the smallest particles (40 nm), while in composites with the largest particles (220–250 nm), the dimensionality of the electrical transport is higher. The temperature dependence of the electrical conductivity of composites with smaller particles is more sensitive to matrix expansion.
Fichier principal
Vignette du fichier
Tretjak et al. - 2021 - Noise and Electrical Characteristics of Composites.pdf (4.56 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03381754 , version 1 (27-10-2021)

Licence

Paternité

Identifiants

Citer

Marina Tretjak, Edita Palaimiene, Sandra Pralgauskaitė, Jonas Matukas, Jūras Banys, et al.. Noise and Electrical Characteristics of Composites Filled with Onion-Like Carbon Nanoparticles. Polymers, 2021, 13 (7), pp.997. ⟨10.3390/polym13070997⟩. ⟨hal-03381754⟩
44 Consultations
31 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More