Ko Tse-Hao er al / New Carbon Materials, 2006, 21(4): 297-301 4 Conclusions fibers from PAn fibers modified with cobaltous chloride. Mater Sci,1992,27:2429-2436 PAN-based carbon fibers can be modified through depo- 9 Ko T H, Chen C Y. Improvement in the properties of sition of carbon film on their surface using CVd method The modification improves the graphitizability and electri- PAN-based carbon films by modification with cobaltous chlo- de. J Appl Polym Sci, 1999, 74: 1745-1751 cal conductivity of PAN-based carbon fibers. The method is [10 Zheng R T, Cheng G A, Zhao Y, et al. Preparation and charac- beneficial to prepare carbon fibers with excellent mechani- terization of carbon nanoribbons produced by the catalytic cal property and good electrical conductivity hemical vapor deposition of acetylene. New Carbon Materi- References ls,2005,20(4):355-3 [11] Watt W, Perov B V Strong fibers. New York: Elsevier Science, [I] Fizer E PAN-based carbon fibers-present state and trend of the technology from the viewpoint of possibilities and limits [12] Guigon M, Oberlin A, Desarmot G Microtexture and structure to influence and to control the fiber properties by the process of some high-modulus. PAN-based carbon fibres. Fiber sci parameters. Carbon, 1989, 27(5): 621-645 Technol,1984,20(3):177-198 2] Edie DD [13 Tuinstra F, Koenig J L Raman spectrum of graphite. J Chem erties of carbon fibers. Carbon, 1998, 35(4): 345-347 Phys,1970,53:1126-1130 [3] Wang M Z PAN-based carbon fiber. New Carbon Materials, [14] Lespade P, Marchand A, Couzi M, et al. Caracterisation de 1998,13(4):79-79 materiaux carbone par microspectrometrie Raman. Carbon [4 Watt w, Philips L N, Johnson W. High-strength high-modulus carbon fibers. The Engineers, 1966, 221: 815-816 [15 Ko T H. Raman spectrum of modified PAN-based carbon 5] Mathur R B. Infrared spectral studies of preoxidized PAN fi- fibers during graphitization. J App/ Polym Sci, 1996, 59 bres incorporated with cuprous chloride additive. Fiber Sci Technol,1984,20:227-234 [16] Ko T H, Kuo W S, Chang Y H Microstructural changes of (6 Bahl O P, Mathur R B, Dhami T L Modification of polyacry phenolic resin during pyrolysis. J Appl Polym Sci, 2001, 81: 1084-1089 performance carbon fibres. Mater Sci Eng, 1985, 73 [17 Marsh H. Introduction to Carbon Science. Hartnoll Ltd, Corn- [7] Raskovic V, Marinkovic S. Processes in sulfur dioxide treat- [18 Fourduex A, Perret R, Ruland W. Proc. Int. Conf on Carbon ment of PAN fibers. Carbon, 1978, 16(5): 351-357. Fibers, Their Composites and Applications. Plastics Institute, London,1971.57-62Ko Tse-Hao et al. / New Carbon Materials, 2006, 21(4): 297–301 4 Conclusions PAN-based carbon fibers can be modified through depo￾sition of carbon film on their surface using CVD method. The modification improves the graphitizability and electri￾cal conductivity of PAN-based carbon fibers. The method is beneficial to prepare carbon fibers with excellent mechani￾cal property and good electrical conductivity. References [1] Fizer E. PAN-based carbon fibers-present state and trend of the technology from the viewpoint of possibilities and limits to influence and to control the fiber properties by the process parameters. Carbon, 1989, 27(5): 621–645. [2] Edie D D. The effect of processing on the structure and prop￾erties of carbon fibers. Carbon, 1998, 35(4): 345–347. [3] Wang M Z. PAN-based carbon fiber. New Carbon Materials, 1998, 13(4): 79–79. [4] Watt W, Philips L N, Johnson W. High-strength high-modulus carbon fibers. The Engineers, 1966, 221: 815–816. [5] Mathur R B. Infrared spectral studies of preoxidized PAN fi￾bres incorporated with cuprous chloride additive. Fiber Sci Technol, 1984, 20: 227–234. [6] Bahl O P, Mathur R B, Dhami T L. Modification of polyacry￾lonitrile fibres to make them suitable for conversion into high performance carbon fibres. Mater Sci Eng, 1985, 73: 105–112. [7] Raskovic V, Marinkovic S. Processes in sulfur dioxide treat￾ment of PAN fibers. Carbon, 1978, 16(5): 351–357. [8] Ko T H, Huang L C. Preparation of high-performance carbon fibers from PAN fibers modified with cobaltous chloride. J Mater Sci, 1992, 27: 2429–2436. [9] Ko T H, Chen C Y. Improvement in the properties of PAN-based carbon films by modification with cobaltous chlo￾ride. J Appl Polym Sci, 1999, 74: 1745–1751. [10] Zheng R T, Cheng G A, Zhao Y, et al. Preparation and charac￾terization of carbon nanoribbons produced by the catalytic chemical vapor deposition of acetylene. New Carbon Materi￾als, 2005, 20(4): 355–359. [11] Watt W, Perov B V. Strong fibers. New York: Elsevier Science, 1985. [12] Guigon M, Oberlin A, Desarmot G. Microtexture and structure of some high-modulus, PAN-based carbon fibres. Fiber Sci Technol, 1984, 20(3): 177–198. [13] Tuinstra F, Koenig J L. Raman spectrum of graphite. J Chem Phys, 1970, 53: 1126–1130. [14] Lespade P, Marchand A, Couzi M, et al. Caractérisation de matériaux carbonés par microspectrometrie Raman. Carbon, 1984, 22: 375–385. [15] Ko T H. Raman spectrum of modified PAN-based carbon fibers during graphitization. J Appl Polym Sci, 1996, 59: 577–580. [16] Ko T H, Kuo W S, Chang Y H. Microstructural changes of phenolic resin during pyrolysis. J Appl Polym Sci, 2001, 81: 1084–1089. [17] Marsh H. Introduction to Carbon Science. Hartnoll Ltd, Corn￾wall, 1989. 218. [18] Fourduex A, Perret R, Ruland W. Proc. Int. Conf. on Carbon Fibers, Their Composites and Applications. Plastics Institute, London, 1971. 57–62