Electrical percolation and electromagnetic properties of polydimethylsiloxane composites filled with Ag nanoparticles of different sizes - Université de Lorraine Accéder directement au contenu
Article Dans Une Revue Polymer Composites Année : 2020

Electrical percolation and electromagnetic properties of polydimethylsiloxane composites filled with Ag nanoparticles of different sizes

Edita Palaimiene
Jan Macutkevic
Vanessa Fierro
Alain Celzard

Résumé

This paper deals with the electrical properties of polydimethylsiloxane nanocomposites filled with Ag nanoparticles (AgNPs) of different sizes. The measurements were carried out over a very broad range of frequencies (20 Hz‐40 GHz), and the results showed that the percolation threshold in the composites is close to 20 vol% and that it is almost independent of particle size. The observed critical exponents reasonably agree with the theoretical values. Above the percolation threshold, the values of dielectric permittivity and electrical conductivity are quite high, ε′ ≈ 107 and σ ≈ 1 S/cm at room temperature and frequency of 129 Hz (which is close to our low frequency limit). The dielectric permittivity of composites decreases strongly with frequency, especially in the microwave range, while the frequency behavior of conductivity strongly depends on the concentration of nanoparticles. Nevertheless, the electrical conductivity and the dielectric permittivity remain high at microwaves (0.1 S/m and 10, respectively), for composites with AgNPs of size 80 to 100 nm at a concentration of 30 vol%.
Fichier principal
Vignette du fichier
electricalpercolation_toHAL.pdf (750.29 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03041976 , version 1 (20-12-2020)

Identifiants

Citer

Edita Palaimiene, Sebastien Schaefer, Jan Macutkevic, Juras Banys, Algirdas Selskis, et al.. Electrical percolation and electromagnetic properties of polydimethylsiloxane composites filled with Ag nanoparticles of different sizes. Polymer Composites, 2020, 41 (11), pp.4750-4756. ⟨10.1002/pc.25748⟩. ⟨hal-03041976⟩
26 Consultations
144 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More