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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Petrov, R. H. | Madrid |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Kopecký, Dušan
University of Pardubice
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2023Flexible, ultrathin and light films from one-dimensional nanostructures of polypyrrole and cellulose nanofibers for high performance electromagnetic interference shieldingcitations
- 2022Room Temperature Detection of Hydrogen Peroxide Vapor by Fe2O3:ZnO Nanograinscitations
- 2022Tailor-made dual doping for morphology control of polyaniline chains in cellulose nanofiber-based flexible electrodes: electrical and electrochemical performancecitations
- 2021Elaboration and properties of nanofibrillated cellulose composites with polypyrrole nanotubes or their carbonized analogscitations
- 2020New approach for the development of reduced graphene oxide/polyaniline nanocomposites via sacrificial surfactant-stabilized reduced graphene oxidecitations
- 2020Electromagnetic interference shielding of polypyrrole nanostructurescitations
- 2017Synthesis of silver-anchored polyaniline–chitosan magnetic nanocomposite: a smart system for catalysiscitations
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article
Electromagnetic interference shielding of polypyrrole nanostructures
Abstract
Polypyrrole (PPy) is an electrically conductive organic material perspective for application in the field of electromagnetic interference shielding (EMI). The presented fundamental study focuses on the shielding efficiency of three various morphologies of PPy (globules, nanotubes and microbarrels). Powdered samples in both protonated and deprotonated form were embedded at various concentrations (1, 3 and 5 % w/w) in a composite system with a transparent silicone matrix cured at temperatures 25 and 150 °C. The ability of PPy to reflect or absorb electromagnetic radiation in the C-band region covering the range from 5.85 to 8.2 GHz was evaluated. The relationship between the morphology of PPy, its DC and AC electrical conductivity, permittivity and shielding efficiency was studied. The PPy nanotubes with the DC conductivity of 60.8 S cm–1 exhibited shielding efficiency S21 = –13.27 dB at 5% w/w concentration in the composite, which corresponds to transparency of 21.7 % only. It was found that the magnitude of electrical conductivity together with the aspect ratio of PPy morphology determines the shielding efficiency whereas the type of morphology is responsible for absorption or reflection mechanism of EMI shielding. Hence, the appropriate adjustment of both the electrical conductivity and the morphology should be used in the future lightweight and flexible EMI shields with tunable shielding efficiency and mechanism of shielding. © 2020 Elsevier B.V.