Modification of isotropic coal-tar pitch by acid treatments for carbon fiber melt-spinning

우미정; 고효준; Yun-Soo Lim (임연수); Myung-Soo Kim (김명수)

Modification of isotropic coal-tar pitch by acid treatments for carbon fiber melt-spinning

Carbon Letters
Abbr : Carbon Lett.
2014, 15(4), pp.247-254
Publisher : Korean Carbon Society
Research Area : Natural Science > Natural Science General > Other Natural Sciences General

우미정 ¹, 고효준 ², Yun-Soo Lim ¹, Myung-Soo Kim ¹

¹명지대학교
²명지대학교 신소재공학과

Accredited

ABSTRACT

In this work, thermal treatment accompanied with different acid treatments was applied toa commercial coal tar pitch (CTP) to obtain a spinnable precursor pitch for carbon fiber. In the case of thermal treatment only, a relatively high reaction temperature of between380°C and 400°C was required to obtain a softening point (SP) range of 220°C-260°C andmany meso-phase particles were created during the application of high reaction temperature. When nitric acid or sulfuric acid treatment was conducted before the thermal treatment, theprecursor pitch with a proper SP range could be obtained at reaction temperatures of 280°C-300°C, which were about 100°C lower than those for the case of thermal treatment only. With the acid treatments, the yield and SP of the precursor pitch increased dramatically andthe formation of meso-phase was suppressed due to the lower reaction temperatures. Sincethe precursor pitches with acid and thermal treatment were not spinnable due to the inhomogeneityof properties such as molecular weight distribution and viscosity, the CTP was mixedwith ethanol before the consecutive nitric acid and thermal treatments. The precursor pitcheswith ethanol, nitric acid, and thermal treatments were easily spinnable, and their spinningand carbon fiber properties were compared to those of air blowing and thermal treated CTP.

KEYWORDS

coal tar pitch, acid treatment, carbon fiber, melt-spinning

Citation status

This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2023-01-03)

Total Citation Counts(KCI+WOS) (15) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

* References for papers published after 2023 are currently being built.

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Carbon Letters 2023 KCI Impact Factor : 1.35 KCI-WoS Impact Factor : 6.04