Microwave response properties of epoxy resin composites filled with graphitic fillers

Author

Bellucci, Stefano ; Bistarelli, S. ; Cataldo, A. ; Micciulla, F. ; Macutkevic, J. ; Kranauskaite, I. ; Banys, J. ; Kuzhir, P. ; Volynets, N. ; Paddubskaya, A. ; Bychanok, D. ; Maksimenko, S. ; Fierro, V. ; Celzard, A.

Author_Institution

Lab. Naz. di Frascati, INFN, Frascati, Italy

fYear

2014

fDate

14-16 May 2014

Firstpage

1

Lastpage

4

Abstract

Composite materials based on epoxy resin filled with various kinds of graphite particles: exfoliated graphite (EG), natural graphite, and coarse, medium and fine artificial graphites have been prepared. The dielectric permittivity strongly increases with graphite particle size. This effect is related to the distance of the investigated filler concentrations to the composites´ percolation threshold. Microwave experiments show that exfoliated graphite is, out of investigated graphite particles, the only one being a really effective additive for producing electromagnetic (EM) interference (EMI) shielding: 2 wt.% epoxy/EG is absolutely opaque to electromagnetic radiation at 30 GHz.

Keywords

electromagnetic shielding; filled polymers; graphite; microwave materials; permittivity; resins; C; artificial graphites; dielectric permittivity; electromagnetic interference shielding; electromagnetic radiation; epoxy resin composites; frequency 30 GHz; graphitic fillers; microwave response properties; natural graphite; Conductivity; Dielectrics; Epoxy resins; Frequency measurement; Graphite; Permittivity; Polymers; Composite materials; dielectric permittivity; exfoliated graphite; microwaves; percolation threshold;

fLanguage

English

Publisher

ieee

Conference_Titel

Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO), 2014 International Conference on

Conference_Location

Pavia

Type

conf

DOI

10.1109/NEMO.2014.6995701

Filename

6995701