High-frequency dielectric analysis of carbon nanofibers from pan precursor at different pyrolysis temperatures

Carbon nanofibers (CNF) produced from pyrolysis of electrospun polyacrylonitrile (PAN) precursor has received a great amount of attention due to their promising potentials. However, there are limited studies on the electrical properties of the CNF, especially at high-frequency range. In this study,...

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Main Authors: Munajat, N. A., Nurfaizey, A. H., Bahar, A. A. M., You, K. Y., Fadzullah, S. H. S. M., Omar, G.
Format: Article
Published: John Wiley and Sons Inc. 2018
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Online Access:http://eprints.utm.my/id/eprint/84594/
http://dx.doi.org/10.1002/mop.31326
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Institution: Universiti Teknologi Malaysia
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spelling my.utm.845942020-02-27T03:20:32Z http://eprints.utm.my/id/eprint/84594/ High-frequency dielectric analysis of carbon nanofibers from pan precursor at different pyrolysis temperatures Munajat, N. A. Nurfaizey, A. H. Bahar, A. A. M. You, K. Y. Fadzullah, S. H. S. M. Omar, G. TK Electrical engineering. Electronics Nuclear engineering Carbon nanofibers (CNF) produced from pyrolysis of electrospun polyacrylonitrile (PAN) precursor has received a great amount of attention due to their promising potentials. However, there are limited studies on the electrical properties of the CNF, especially at high-frequency range. In this study, CNF from PAN precursor were produced by electrospinning technique. Characterizations of the nanofibers were carried out in terms of physical, dielectric, and chemical properties. The stabilization of nanofibers took place at 240°C whilst carbonization process took place at temperatures of 800°C, 1000°C, and 1200°C, respectively. In terms of physical properties, the color of the nanofiber webs changed from white to brown and black, after stabilization and carbonization process accompanied by significant reduction in average fiber diameter. Dielectric analysis of the nanofibers was obtained by measuring the wave propagation characteristics at frequency range of 1 GHz to 10 GHz. Higher dielectric constants of the material were observed for fibers processed at higher carbonization temperatures. Good conductivity was also observed with loss tangent value that is higher than 1. The results were correlated with FTIR transmittance results, indicating greater amount of carbon are present in the nanofiber material. From the findings, the unique behavior of the nanofibers makes it practically potential for sensor applications. Explorations of future research in this area are to be sought. John Wiley and Sons Inc. 2018-09 Article PeerReviewed Munajat, N. A. and Nurfaizey, A. H. and Bahar, A. A. M. and You, K. Y. and Fadzullah, S. H. S. M. and Omar, G. (2018) High-frequency dielectric analysis of carbon nanofibers from pan precursor at different pyrolysis temperatures. Microwave and Optical Technology Letters, 60 (9). pp. 2198-2204. ISSN 0895-2477 http://dx.doi.org/10.1002/mop.31326
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TK Electrical engineering. Electronics Nuclear engineering
spellingShingle TK Electrical engineering. Electronics Nuclear engineering
Munajat, N. A.
Nurfaizey, A. H.
Bahar, A. A. M.
You, K. Y.
Fadzullah, S. H. S. M.
Omar, G.
High-frequency dielectric analysis of carbon nanofibers from pan precursor at different pyrolysis temperatures
description Carbon nanofibers (CNF) produced from pyrolysis of electrospun polyacrylonitrile (PAN) precursor has received a great amount of attention due to their promising potentials. However, there are limited studies on the electrical properties of the CNF, especially at high-frequency range. In this study, CNF from PAN precursor were produced by electrospinning technique. Characterizations of the nanofibers were carried out in terms of physical, dielectric, and chemical properties. The stabilization of nanofibers took place at 240°C whilst carbonization process took place at temperatures of 800°C, 1000°C, and 1200°C, respectively. In terms of physical properties, the color of the nanofiber webs changed from white to brown and black, after stabilization and carbonization process accompanied by significant reduction in average fiber diameter. Dielectric analysis of the nanofibers was obtained by measuring the wave propagation characteristics at frequency range of 1 GHz to 10 GHz. Higher dielectric constants of the material were observed for fibers processed at higher carbonization temperatures. Good conductivity was also observed with loss tangent value that is higher than 1. The results were correlated with FTIR transmittance results, indicating greater amount of carbon are present in the nanofiber material. From the findings, the unique behavior of the nanofibers makes it practically potential for sensor applications. Explorations of future research in this area are to be sought.
format Article
author Munajat, N. A.
Nurfaizey, A. H.
Bahar, A. A. M.
You, K. Y.
Fadzullah, S. H. S. M.
Omar, G.
author_facet Munajat, N. A.
Nurfaizey, A. H.
Bahar, A. A. M.
You, K. Y.
Fadzullah, S. H. S. M.
Omar, G.
author_sort Munajat, N. A.
title High-frequency dielectric analysis of carbon nanofibers from pan precursor at different pyrolysis temperatures
title_short High-frequency dielectric analysis of carbon nanofibers from pan precursor at different pyrolysis temperatures
title_full High-frequency dielectric analysis of carbon nanofibers from pan precursor at different pyrolysis temperatures
title_fullStr High-frequency dielectric analysis of carbon nanofibers from pan precursor at different pyrolysis temperatures
title_full_unstemmed High-frequency dielectric analysis of carbon nanofibers from pan precursor at different pyrolysis temperatures
title_sort high-frequency dielectric analysis of carbon nanofibers from pan precursor at different pyrolysis temperatures
publisher John Wiley and Sons Inc.
publishDate 2018
url http://eprints.utm.my/id/eprint/84594/
http://dx.doi.org/10.1002/mop.31326
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