이산화탄소를 이용한 등방성 탄소섬유의 활성화과정 중 발생하는 구조변화(I)-XRD를 이용한 분석

노재승; J.S. Roh

Korean Journal of Materials Research, Vol.13, No.11, 742-748, November, 2003

DOI10.3740/MRSK.2003.13.11.742 Export Citation

이산화탄소를 이용한 등방성 탄소섬유의 활성화과정 중 발생하는 구조변화(I)-XRD를 이용한 분석

Microstructural Changes during Activation Process of Isotopic Carbon Fibers using CO2 Gas(I)-XRD Study

노재승 ^†

금오공과대학교 신소재공학부

J.S. Roh^†

School of Advanced Materials and Systems Engineering, Kumoh National University of Technology, Korea

E-mail:

The structural parameters such as Lc, La and d of activated isotropic carbon fibers(ACFs) were obtained from XRD in order to understand a development mechanism of micropores. And the structural parameters were compared with specific surface area(SSA) data. The , Lc, and La of the original fiber were measured to be 4.04, 6.2, and 23.6, respectively. Carbonization of outer-parts and oxidization of inner-parts of the original fibers were far from completeness. It was observed that the structural changes of the ACFs during activation take place severely, therefore the carbonization and the oxidization of the fibers take place simultaneous with pore developments. The of the ACFs was increased to be 2.80, and the La of the ACFs was decreased to be 17.0 by activation. It was shown that the pores are developed continuously from the outer-parts to the inner-parts of the fibers, therefore the SSA increases as a result of the development of pores fully to the inner-parts of the fiber when the burn-off degree was over :39%. It seems that the (002) planes of crystallites contribute to the micropore wall related to the super high SSA.SSA.

Keywords:ACFs;XRD;SSA;micropore structures;isotropic carbon fiber

[References]

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Mittelmeijer-Hazeleger MC, Martin-Martinez JM, Carbon, 30, 695 (1992)
Marsh H, Carbon, 25, 49 (1987)
Bustin RM, Rouzaud JN, Ross JV, Carbon, 33, 679 (1995)
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Yoon SH, Korai Y, Mochida I, Yokogawa K, Fukuyama S, Yoshimura M, Carbon, 34, 83 (1996)
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Mays T, Howell J, King L, McEnaney B, Edie D, Carbon, 95, 510 (1995)
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Gondy D, Ehrburger P, Carbon, 35, 1745 (1997)
Sha XZ, Kyotani T, Tomita A, Fuel, 69, 1564 (1990)
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Sharma A, Kyotani T, Tomita A, Fuel, 78(10), 1203 (1999)

[Referenced By]

[Related Articles]

[1] Gregg SJ, Sing KSW, 'Adsorption, Surface Area and Porosity', Academic Press, London (1982) (1982)

[2] Carrot PJM, Sing KSW, 'Characterization of Porous Solid', 77, Ed. by Unger KK, Rouquerol J, Sing KSW, Kral H, Elsevier Sci. Publ., Amsterdam (1988) (1988)

[3] Mittelmeijer-Hazeleger MC, Martin-Martinez JM, Carbon, 30, 695 (1992)

[4] Marsh H, Carbon, 25, 49 (1987)

[5] Bustin RM, Rouzaud JN, Ross JV, Carbon, 33, 679 (1995)

[6] Endo M, Kim C, Karaki T, Kasai T, Matthews MJ, Brown SDM, Dresselhaus MS, Tamaki T, Nishimura Y, Carbon, 36, 1633 (1998)

[7] Montes-Moran MA, Young RJ, Carbon, 40, 845 (2002)

[8] Yoon SH, Korai Y, Mochida I, Yokogawa K, Fukuyama S, Yoshimura M, Carbon, 34, 83 (1996)

[9] Endo M, J. Mater. Sci., 23, 598 (1988)

[10] Oberlin A, Villey M, Combaz A, Carbon, 18, 347 (1980)

[11] Warren BE, The Physical Review, 59, 693 (1941)

[12] Yen TF, Erdman JG, Pollack SS, Analytical Chemistry, 33, 1587 (1961)

[13] Ludwig Schoening FR, Fuel, 62, 1315 (1983)

[14] Wertz DL, Quin JL, Energy Fuels, 12(4), 697 (1998)

[15] Kovalevski VV, Buseck PR, Cowley JM, Carbon, 39, 243 (2001)

[16] Shioya M, Ojima T, Yamashita J, Carbon, 39, 1869 (2001)

[17] Shim HS, Hurt R, Carbon, 18-23, 438 (1997)

[18] Yoshizawa N, Yamada Y, Shiraishi M, J. Mater. Sci., 33(1), 199 (1998)

[19] Ludwig Schoening FR, Fuel, 61, 695 (1982)

[20] Ehrburger P, Pusset N, Dziedzinlo P, Carbon, 30, 1105 (1992)

[21] Freeman JJ, Gimblett FGR, Sing KSW, Carbon, 27, 85 (1989)

[22] Suzuki T, Kaneko K, J. Colloid Interface Sci., 138, 590 (1990)

[23] Kaneko K, Ishii C, Ruike M, Kuwabara H, Carbon, 30, 1075 (1992)

[24] Derbyshire F, Andrews R, Jacques D, Jagtoyen M, Kimber G, Rantell T, Fuel, 80(3), 345 (2001)

[25] Yoshizawa N, Maruyama K, Yamada Y, Zielinska-Blajet M, Fuel, 79, 1461 (2000)

[26] Ryu Z, Rong H, Zheng J, Wang M, Zhang B, Carbon, 40, 1131 (2002)

[27] Chang Q, Liu T, Cal X, Carbon, 95, 514 (1995)

[28] Mays T, Howell J, King L, McEnaney B, Edie D, Carbon, 95, 510 (1995)

[29] Fryer JR, Carbon, 19, 431 (1981)

[30] Huttepain M, Oberlin A, Carbon, 28, 103 (1990)

[31] Schukin LI, Komievich MV, Vartapetjan RS, Beznisko SI, Carbon, 40, 2021 (2002)

[32] Kamegawa K, Nishikubo K, Yoshida H, Carbon, 36, 433 (1998)

[33] Gondy D, Ehrburger P, Carbon, 35, 1745 (1997)

[34] Sha XZ, Kyotani T, Tomita A, Fuel, 69, 1564 (1990)

[35] Roh JS, Suhr DS, Korean J. Mater. Res., 7, 121 (1997)

[36] Roh JS, Suhr DS, Korean J. Mater. Res., 8, 114 (1998)

[37] Roh JS, Suhr DS, Korean J. Mater. Res., 8, 120 (1998)

[38] Biscoe J, Warren BE, J. Appl. Phys., 13, 364 (1942)

[39] Kercher AK, Nagle DC, Carbon, 41(10), 15 (2003)

[40] Ergun S, Tiensuu VH, Fuel, 38, 64 (1959)

[41] Sharma A, Kyotani T, Tomita A, Fuel, 78(10), 1203 (1999)