이산화탄소를 이용한 등방성 탄소섬유의 활성화과정 중 발생하는 구조변화(II)-TEM을 이용한 분석

노재승; J.S. Roh

Korean Journal of Materials Research, Vol.13, No.11, 749-755, November, 2003

DOI10.3740/MRSK.2003.13.11.749 Export Citation

이산화탄소를 이용한 등방성 탄소섬유의 활성화과정 중 발생하는 구조변화(II)-TEM을 이용한 분석

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

노재승 ^†

금오공과대학교 신소재공학부

J.S. Roh^†

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

E-mail:

A development of micropores of activated isotropic carbon fibers from TEM was observed. It was observed that the micropores of activated carbon fibers(ACFs) were consisted of slit-shaped pores(SP) and cylinder-shaped pores(CP). The SPs were formed between two parallel-carbon layers, and the CPs were formed at a place which is connected polygonally by more than two carbon layers. It was shown that the CPs of the ACFs were developed at high degree of burn-offs and at high activation temperature. The pore size distribution of the best ACF, which was observed at a highest value of specific surface area(3,495 /g), showed a continuous distribution in the range of about , and the median pore size was 6.7. The super-high specific surface area of ACFs was found to be due to that the SPs were connected with a maximum size of 7∼8 continuously, It is possible that the SPs should be formed in the ACFs in order to show super-high SSA.

Keywords:ACF;TEM;micropore;pore structure;isotropic carbon fiber

[References]

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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)
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Marsh H, Carbon, 25, 49 (1987)
Kaneko K, Ishii C, Ruike M, Kuwabara H, Carbon, 30, 1075 (1992)
Fryer JR, Carbon, 19, 431 (1981)
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Lu S, Blanco C, Rand B, Carbon, 38, 3 (2000)
Sharma A, Kyotani T, Tomita A, Carbon, 38, 1977 (2000)
Kercher AK, Nagle DC, Carbon, 41, 15 (2003)
Yoshzawa N, Maruyama K, Yamada Y, Zielinska-Blajet M, Fuel, 79, 1461 (2000)
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Oshida K, Nakazawa T, Miyazaki T, Endo M, Synthetic Metals, 125, 223 (2002)
Sharma A, Kyotani T, Tomita A, Fuel, 78(10), 1203 (1999)
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Roh JS, Suhr DS, Korean J. Materials Research, 8, 120 (1998)
Roh JS, Korean J. Materials Research, in press (2003) (2003)
Fung AWP, Rao AM, Kuriyama K, Dresselhaus MS, Dresselhaus G, Endo M, Shindo N, J. Mater. Res., 8, 489 (1993)

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

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

[7] Marsh H, Crawford D, O'Grady TM, Wennerberg A, Carbon, 20, 419 (1982)

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

[9] Lu S, Blanco C, Rand B, Carbon, 38, 3 (2000)

[10] Sharma A, Kyotani T, Tomita A, Carbon, 38, 1977 (2000)

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

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

[13] Oshida K, Endo M, Nakajima T, Di Vittorio SL, Dresselhaus MS, Dresselhaus G, J. Mater. Res., 8, 512 (1993)

[14] Oshida K, Kogiso K, Matsubayashi K, Takeuchi K, Kobayashi S, Endo M, Dresselhaus MS, Dresselhaus G, J. Mater. Res., 10, 2507 (1995)

[15] Dobb MG, Guo H, Johnson DJ, Park CR, Carbon, 33, 1553 (1995)

[16] Shim HS, Hurt R, Carbon, 97, 438 (1997)

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

[18] Endo M, Furuta T, Minoura F, Kim C, Supramolecular Science, 5, 261 (1998)

[19] Kim DY, Nishiyama Y, Wada M, Kuga S, Carbon, 39, 1051 (2001)

[20] Oshida K, Nakazawa T, Miyazaki T, Endo M, Synthetic Metals, 125, 223 (2002)

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

[22] Roh JS, Suhr DS, Korean J. Materials Research, 8, 114 (1998)

[23] Roh JS, Suhr DS, Korean J. Materials Research, 8, 120 (1998)

[24] Roh JS, Korean J. Materials Research, in press (2003) (2003)

[25] Fung AWP, Rao AM, Kuriyama K, Dresselhaus MS, Dresselhaus G, Endo M, Shindo N, J. Mater. Res., 8, 489 (1993)