Microwave attenuation of graphene modified thermoplastic poly(butylene adipate-coterephthalate) nanocomposites

Kashi, Sima, Hadigheh, S.Ali and Varley, Russell 2018, Microwave attenuation of graphene modified thermoplastic poly(butylene adipate-coterephthalate) nanocomposites, Polymers, vol. 10, no. 6, Special issue: smart and modern thermoplastic polymer materials, doi: 10.3390/polym10060582.

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Title Microwave attenuation of graphene modified thermoplastic poly(butylene adipate-coterephthalate) nanocomposites
Author(s) Kashi, Sima
Hadigheh, S.Ali
Varley, RussellORCID iD for Varley, Russell orcid.org/0000-0002-3792-1140
Journal name Polymers
Volume number 10
Issue number 6
Season Special issue: smart and modern thermoplastic polymer materials
Total pages 15
Publisher MDPI
Place of publication Basel, Switzerland
Publication date 2018-05-25
ISSN 2073-4360
Keyword(s) graphene
EMI shielding
frequency range
thickness range
science & technology
physical sciences
polymer science
Summary With the widespread development and use of electronics and telecommunication devices, electromagnetic radiation has emerged as a new pollution. In this study, we fabricated flexible multifunctional nanocomposites by incorporating graphene nanoplatelets into a soft thermoplastic matrix and investigated its performance in attenuating electromagnetic radiation over frequency ranges of C (5.85-8.2 GHz), X (8.2-12.4 GHz), and Ku bands (12.4-18 GHz). Effects of nanofiller loading, sample thickness, and radiation frequency on the nanocomposites shielding effectiveness (SE) were investigated via experimental measurements and simulation. The highest rate of increase in SE was observed near percolation threshold of graphene. Comparison of reflectivity and absorptivity revealed that reflection played a major role in nanocomposites shielding potential for all frequencies while the low absorptivity was due to high power reflection at nanocomposite surface and thin thickness. Subsequently, effective absorbance calculations revealed the great potential of nanocomposites for absorbing microwaves, reaching more than 80%. Simulations confirmed the observed nanocomposites SE behaviours versus frequency. Depending on thickness, different frequency dependency behaviours were observed; for thin samples, SE remained unchanged, while for thicker samples it exhibited either increasing or decreasing trends with increasing frequency. At any fixed frequency, increasing the thickness resulted in sine-wave periodic changes in SE with a general increasing trend.
Language eng
DOI 10.3390/polym10060582
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2018, The Authors
Persistent URL http://hdl.handle.net/10536/DRO/DU:30110999

Document type: Journal Article
Collections: Institute for Frontier Materials
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