Modeling dielectric permittivity of polymer composites filled with transition metal dichalcogenide nanoparticles

A. D. Drozdov, J. de Claville Christiansen

Research output: Contribution to journalArticlepeer-review

Abstract

A model is developed for the dielectric permittivity of polymer nanocomposites reinforced with transition metal dichalcogenide fillers at microwave frequencies. The model takes into account aggregation of nanoparticles into clusters (that involve both filler and matrix components) and the aspect ratio of aggregates. The governing equations involve four material parameters that are found by matching observations on the real and imaginary parts of the dielectric permittivity of polymers reinforced with MoS2 and WS2 micro- and nanospheres, MoS2 nanosheets and nanoflowers, and composite heterostructures formed by MoS2 and MoS2-CoS2 nanoparticles with graphene and reduced graphene oxide. Good agreement is demonstrated between results of simulation and the experimental data at frequencies in the S, X, and Ku bands of the electromagnetic spectrum. It is shown that composite heterostructures have superior dielectric properties compared with those of neat transition metal dichalcogenide nanoparticles.

Original languageEnglish
Pages (from-to)3841-3855
Number of pages15
JournalJournal of Composite Materials
Volume54
Issue number25
DOIs
StatePublished - 1 Oct 2020
Externally publishedYes

Keywords

  • Polymer composite
  • dielectric permittivity
  • microwave frequency
  • transition metal dichalcogenide

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