Isotropic Carbon and Graphite Fibers from Chemically Modified Coal-Tar Pitch

Kap Seung Yang; Dong Joon Lee; Seung Kon Ryu; Yozo Korai; Yong Joong Kim; Isao Mochida

Korean Journal of Chemical Engineering, Vol.16, No.4, 518-524, July, 1999

Kap Seung Yang^{1, †}, Dong Joon Lee^{1, 2}, Seung Kon Ryu^{1, 3}, Yozo Korai^{1, 3}, Yong Joong Kim^{1, 4}, and Isao Mochida^{1, 5}

¹Department of Textile Engineering, Chonnam National University, Kwangju, Korea
²Korea Steel Chemical Co, LTD., Kyonggi, Korea
³Department of Chemical Engineering, Chungnam National University, Taejon, Korea
⁴, Korea
⁵Institute of Advanced Material, StudyKyushu University, Fukuoka, Japan

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A precursor for a general purpose carbon fiber was prepared from coal tar pitch (CP) modified with 10% p-benzoquinone (BQ) at 380℃ for 3 hours. Such a modification raised the softening of the pitch from 85℃ to 271℃ at a yield of 43%. The modified pitch was spun smoothly at a rate of 480 m/min into a fiber of 20μm diameter. The fiber was stepwise stabilized at 236℃ (5℃/min) and 312℃(1℃/min) for 3 hours at each temperature. Successively, carbonization and graphitization were performed at 1,000℃ and 2,400℃, respectively, for one hour. Both the carbonized and graphitized fibers exhibited tensile strength of 570MPa. The structural parameters of carbon and graphite fibers were their orientation values of 56.2 and 58.1%, relatively low Lc(002) of 11.24 and 25Å, and large interlayer spacing (d₀₀₂) of 3.86 and 3.49Å, respectively.

Keywords:Coal Tar Pitch;Chemical Modification;Benzoquinone

[References]

Brown JK, Lander WR, Fuel, 39, 87 (1963)
Brydson JA, "Flow Properties of Polymer Melts," Butter and Tanner Limited, London, 18 (1981)
Davidson RM, "Nuclear Magnetic Resonance Studies of Coal," IEA Coal Research, London, 40 (1986)
Donnet JB, Bansal RC, "Carbon Fibers," Marcel Dekker, Inc., New York and Basel, 56 (1990)
Komato M, Sakai Y, Korai Y, Ishida S, Watanabe F, Yoon SH, Wang YG, Mochida I, Kato I, Nakamura T, Carbon, 35, 1733 (1997)
Maeda T, Zeng SM, Tokumitsu K, Mondori J, Mochida I, Carbon, 31, 407 (1993)
Mochida I, Yatsunami S, Kawabuchi Y, Nakayama Y, Carbon, 33, 1611 (1995)
Otani S, Okuda K, Matsuda HS, "Carbon Fiber," Kindai Henshu Ltd., Tokyo Japan, 175 (1983)
Otani S, U.S. Patent, 3,629,379 (1971)
Yang KS, Lee DJ, Choi JH, Kumagai H, Sanada Y, "Reaction of Coal Tar Pitch with p-Benzoquinone," in Extended Abstracts of 21st Annual Meeting of the Carbon Society of Japan, Tokyo, 80 (1994)
Zeng SM, Maeda T, Mondori J, Tokumitsu K, Mochida I, Carbon, 31, 421 (1993)
Zeng SM, Maeda T, Tokumitsu T, Mondori J, Mochida I, Carbon, 31, 413 (1993)

[Referenced By]

[1] Brown JK, Lander WR, Fuel, 39, 87 (1963)

[2] Brydson JA, "Flow Properties of Polymer Melts," Butter and Tanner Limited, London, 18 (1981)

[3] Davidson RM, "Nuclear Magnetic Resonance Studies of Coal," IEA Coal Research, London, 40 (1986)

[4] Donnet JB, Bansal RC, "Carbon Fibers," Marcel Dekker, Inc., New York and Basel, 56 (1990)

[5] Komato M, Sakai Y, Korai Y, Ishida S, Watanabe F, Yoon SH, Wang YG, Mochida I, Kato I, Nakamura T, Carbon, 35, 1733 (1997)

[6] Maeda T, Zeng SM, Tokumitsu K, Mondori J, Mochida I, Carbon, 31, 407 (1993)

[7] Mochida I, Yatsunami S, Kawabuchi Y, Nakayama Y, Carbon, 33, 1611 (1995)

[8] Otani S, Okuda K, Matsuda HS, "Carbon Fiber," Kindai Henshu Ltd., Tokyo Japan, 175 (1983)

[9] Otani S, U.S. Patent, 3,629,379 (1971)

[10] Yang KS, Lee DJ, Choi JH, Kumagai H, Sanada Y, "Reaction of Coal Tar Pitch with p-Benzoquinone," in Extended Abstracts of 21st Annual Meeting of the Carbon Society of Japan, Tokyo, 80 (1994)

[11] Zeng SM, Maeda T, Mondori J, Tokumitsu K, Mochida I, Carbon, 31, 421 (1993)

[12] Zeng SM, Maeda T, Tokumitsu T, Mondori J, Mochida I, Carbon, 31, 413 (1993)