CARBONIZATION OF KEVLAR FABRICS FOR EFFECTIVE EMI SHIELDING APPLICATIONS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24410%2F18%3A00006365" target="_blank" >RIV/46747885:24410/18:00006365 - isvavai.cz</a>

Výsledek na webu

<a href="http://vat.ft.tul.cz/Archive/VaT_2018_4.html" target="_blank" >http://vat.ft.tul.cz/Archive/VaT_2018_4.html</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

CARBONIZATION OF KEVLAR FABRICS FOR EFFECTIVE EMI SHIELDING APPLICATIONS

Popis výsledku v původním jazyce

In the present work, porous and electrically conductive activated carbon fabric was produced by heating Kevlar fabric wastes using novel single stage carbonization. The influence of carbonization temperature of 800, 1000 and 1200°C on physical and morphological properties of activated carbon fabric was studied from EDX and SEM 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. 2.45 GHz) and low frequency regions (i.e. below 1.5 GHz) using waveguide method and coaxial transition line method respectively. The activated carbon fabric produced at 1200°C showed maximum shielding effectiveness in both high and low frequency regions. For single layers of 1200°C carbon fabric, the electromagnetic shielding effectiveness of 40.5, 41.8, 45.1 and 50.9 dB was found for respective frequencies of 30 MHz, 100 MHz, 1 GHz and 1.5 GHz. This behaviour was attributed to increased absorption of electromagnetic radiations due to its higher porosity and also to increased reflections of electromagnetic radiations due to its higher electrical conductivity.

Název v anglickém jazyce

CARBONIZATION OF KEVLAR FABRICS FOR EFFECTIVE EMI SHIELDING APPLICATIONS

Popis výsledku anglicky

In the present work, porous and electrically conductive activated carbon fabric was produced by heating Kevlar fabric wastes using novel single stage carbonization. The influence of carbonization temperature of 800, 1000 and 1200°C on physical and morphological properties of activated carbon fabric was studied from EDX and SEM 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. 2.45 GHz) and low frequency regions (i.e. below 1.5 GHz) using waveguide method and coaxial transition line method respectively. The activated carbon fabric produced at 1200°C showed maximum shielding effectiveness in both high and low frequency regions. For single layers of 1200°C carbon fabric, the electromagnetic shielding effectiveness of 40.5, 41.8, 45.1 and 50.9 dB was found for respective frequencies of 30 MHz, 100 MHz, 1 GHz and 1.5 GHz. This behaviour was attributed to increased absorption of electromagnetic radiations due to its higher porosity and also to increased reflections of electromagnetic radiations due to its higher electrical conductivity.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

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OECD FORD obor

20503 - Textiles; including synthetic dyes, colours, fibres (nanoscale materials to be 2.10; biomaterials to be 2.9)

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Fibres and textiles (Vlákna a textil)

ISSN

1335-0617

e-ISSN

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Svazek periodika

25

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

4

Strana od-do

41-44

Kód UT WoS článku

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EID výsledku v databázi Scopus

2-s2.0-85064484370