Exceptional electromagnetic radiation shielding performance and dielectric properties of surfactant assisted polypyrrole-carbon allotropes composites
| Autor: | Shivani Kaushik, Preeti Gairola, Preetam Bhardwaj, S.P. Gairola |
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| Rok vydání: | 2018 |
| Předmět: |
Radiation
Materials science Dopant Graphene Emulsion polymerization 02 engineering and technology Dielectric 010402 general chemistry 021001 nanoscience & nanotechnology Polypyrrole 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound chemistry law Electromagnetic shielding Composite material 0210 nano-technology Polarization (electrochemistry) Microwave |
| Zdroj: | Radiation Physics and Chemistry. 151:156-163 |
| ISSN: | 0969-806X |
| DOI: | 10.1016/j.radphyschem.2018.06.001 |
| Popis: | The present work reports the development of composites of surfactant assisted Polypyrrole incorporated with three different carbon allotropes that are Amine Functionalized Multiwalled Carbon Nanotubes, Graphene and Hybrid Carbon Assemblage by in-situ emulsion polymerization of Pyrrole monomer with Sodium Lauryl sulphate as dopant. The prepared composites were characterized by different techniques. Spectroscopic analysis demonstrates that the presence of Graphene, Amine Functionalized Multiwalled Carbon Nanotubes and Hybrid carbon structures facilitates strong polarization due to the formation of a solid-state charge-transfer complex between Polypyrrole and Carbon Allotropes. This provides appropriate impedance matching and superior dipole interaction, which leads to the high microwave absorption properties. Exceptional Electromagnetic Radiation shielding measurement of the composites in Ku-band shows a shielding attenuation from − 28.8 dB to − 79.9 dB. Based on obtained results, polypyrrole-carbon allotropes composites can be utilized as effective shield materials for electromagnetic noise signals and electronic packaging of high tech equipments. Furthermore, the obtained high values of dielectric properties suggest that the prepared composites can be used for stealth technology. |
| Databáze: | OpenAIRE |
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