Development of porous and electrically conductive activated carbon web for effective EMI shielding applications

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24410%2F17%3A00003759" target="_blank" >RIV/46747885:24410/17:00003759 - isvavai.cz</a>
Result on the web
<a href="http://www.sciencedirect.com/science/article/pii/S0008622316308855" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0008622316308855</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.carbon.2016.10.026" target="_blank" >10.1016/j.carbon.2016.10.026</a>

Result language
angličtina
Original language name
Development of porous and electrically conductive activated carbon web for effective EMI shielding applications
Original language description
In present work, porous and electrically conductive activated carbon needle punched nonwoven web was produced by heating acrylic fibrous wastes under the layer of charcoal using novel single stage carbonization and physical activation. The influence of 800 °C, 1000 °C and 1200 °C carbonization temperature on physical and morphological properties of activated carbon web was studied from EDX, X-ray diffraction, SEM, X-ray tomography and BET analysis. Additionally, the electrical conductivity was also measured. At the end, the utility of prepared activated carbon web was investigated for electromagnetic shielding ability in high frequency (i.e. at 2.45 GHz) and low frequency regions (i.e. below 1.5 GHz) using waveguide method and coaxial transmission line method, respectively. The activated carbon web produced at 1200 °C showed maximum shielding effectiveness in both high and low frequency regions. For single layers of 1200 °C web, the electromagnetic shielding effectiveness of 63.26 dB, 66.75 dB, and 75.44 dB was found for respective frequencies of 600 MHz, 1 GHz, and 1.5 GHz. This behavior was attributed to the increased multiple internal reflections and stronger absorption of electromagnetic radiations in 1200 °C activated carbon web.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20503 - Textiles; including synthetic dyes, colours, fibres (nanoscale materials to be 2.10; biomaterials to be 2.9)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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