Investigation of the degradation of pitch-based carbon fibers properties upon insufficient or excess thermal treatment

Abstract To overcome the disadvantages of discontinuous conventional batch extruders, a continuous screw extruder is introduced to manufacture pitch-based carbon fibers. For a carbon fiber preparation process, an oxidation time of 8 h was determined to be optimal for obtaining desirable mechanical p...

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Autores principales:	Tae Hwan Lim, Sang Young Yeo
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0df7aab59f8a45c79103e1e746dfef1f
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spelling	oai:doaj.org-article:0df7aab59f8a45c79103e1e746dfef1f2021-12-02T12:32:08ZInvestigation of the degradation of pitch-based carbon fibers properties upon insufficient or excess thermal treatment10.1038/s41598-017-05192-52045-2322https://doaj.org/article/0df7aab59f8a45c79103e1e746dfef1f2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05192-5https://doaj.org/toc/2045-2322Abstract To overcome the disadvantages of discontinuous conventional batch extruders, a continuous screw extruder is introduced to manufacture pitch-based carbon fibers. For a carbon fiber preparation process, an oxidation time of 8 h was determined to be optimal for obtaining desirable mechanical properties of the fibers acquiring employing the screw extruder. It is hypothesized that the differences in the properties of the carbon fibers fabricated utilizing the batch and screw extruders originate from the melt spinning time; therefore, a combined equation for the total amount of heat treatment from the pitch precursor through the oxidation process is established in this study. The crystallinity of the carbon fibers is confirmed to correspond to the differences in mechanical properties as the oxidation time increases. The poor mechanical properties of the carbon fibers that are insufficiently oxidized are a result of irregular oxidation from the sheath to the core of the fiber cross section. However, the over-oxidized carbon fibers also show poor mechanical properties than the optimal fibers. This result further affirms that excessive oxidation times cause unstable chemical bonding, which interrupts the formation of stable crystal structures after carbonization.Tae Hwan LimSang Young YeoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Tae Hwan Lim Sang Young Yeo Investigation of the degradation of pitch-based carbon fibers properties upon insufficient or excess thermal treatment
description	Abstract To overcome the disadvantages of discontinuous conventional batch extruders, a continuous screw extruder is introduced to manufacture pitch-based carbon fibers. For a carbon fiber preparation process, an oxidation time of 8 h was determined to be optimal for obtaining desirable mechanical properties of the fibers acquiring employing the screw extruder. It is hypothesized that the differences in the properties of the carbon fibers fabricated utilizing the batch and screw extruders originate from the melt spinning time; therefore, a combined equation for the total amount of heat treatment from the pitch precursor through the oxidation process is established in this study. The crystallinity of the carbon fibers is confirmed to correspond to the differences in mechanical properties as the oxidation time increases. The poor mechanical properties of the carbon fibers that are insufficiently oxidized are a result of irregular oxidation from the sheath to the core of the fiber cross section. However, the over-oxidized carbon fibers also show poor mechanical properties than the optimal fibers. This result further affirms that excessive oxidation times cause unstable chemical bonding, which interrupts the formation of stable crystal structures after carbonization.
format	article
author	Tae Hwan Lim Sang Young Yeo
author_facet	Tae Hwan Lim Sang Young Yeo
author_sort	Tae Hwan Lim
title	Investigation of the degradation of pitch-based carbon fibers properties upon insufficient or excess thermal treatment
title_short	Investigation of the degradation of pitch-based carbon fibers properties upon insufficient or excess thermal treatment
title_full	Investigation of the degradation of pitch-based carbon fibers properties upon insufficient or excess thermal treatment
title_fullStr	Investigation of the degradation of pitch-based carbon fibers properties upon insufficient or excess thermal treatment
title_full_unstemmed	Investigation of the degradation of pitch-based carbon fibers properties upon insufficient or excess thermal treatment
title_sort	investigation of the degradation of pitch-based carbon fibers properties upon insufficient or excess thermal treatment
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/0df7aab59f8a45c79103e1e746dfef1f
work_keys_str_mv	AT taehwanlim investigationofthedegradationofpitchbasedcarbonfiberspropertiesuponinsufficientorexcessthermaltreatment AT sangyoungyeo investigationofthedegradationofpitchbasedcarbonfiberspropertiesuponinsufficientorexcessthermaltreatment
_version_	1718394139649769472

Investigation of the degradation of pitch-based carbon fibers properties upon insufficient or excess thermal treatment

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