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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2014,Vol.30>> Issue(4)>> 753-760     doi: 10.3866/PKU.WHXB201401241         中文摘要
PHYSICAL CHEMISTRY OF MATERIALS
Modification of Microvoid Defects in Polyacrylonitrile-Based Carbon Fibers by a Liquid Oligomer of Acrylonitrile
CHAI Xiao-Yan1,2, ZHU Cai-Zhen2, HE Chuan-Xin2, ZHANG Guang-Zhao1, LIU Jian-Hong2
1 School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, P. R. China;
2 Shenzhen Key Laboratory of Functional Polymer, College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, Guangdong Province, P. R. China
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The strength of industrial carbon fibers (CFs) is far lower than their theoretical strength because of defects in the microstructure of carbon fibers and these are the main restrictions in improving their performance. The most effective way to improve the strength of CFs is to reduce the amount of these defects. We thus report a novel method using a liquid oligomer of acrylonitrile (LAN) to modify the defects. Briefly, Polyacrylonitrile (PAN)-based CFs T300 were infused into LAN, and subsequently oxidized in air and carbonized in nitrogen. Their tensile strength increased by 25%. Two-dimensional small angle X-ray scattering (SAXS) was used to characterize the variation in length of the microvoids (L), the chord length of cross section lp, the orientation angle (Beq), and the relative volume (Vrel). The results show that the length, orientation, angle and relative volume of the microvoids were much lower and the tensile property improved. The improvement in the tensile property comes from the modification of defects in CFs T300 by LAN. The BET method and scanning electron microscopy (SEM) were used to characterize the specific surface area and the morphology of T300 before and after LAN treatment. The results show that after the treatment of LAN the specific surface area decreased and the amount of surface defects also decreased.We further prove that the liquid oligomer of acrylonitrile can modify the defects in CFs. X-ray photoelectron spectroscopy (XPS) was used to study the chemical composition of LAN-treated CF surfaces. The results show that the relative content of oxygen-containing functional groups on the surface of the CFs (C―OH, C=O, HO―C=O) increased significantly. The increase in oxygen-containing groups enhanced the surface polarity of the CFs, improving the interaction between the treated CFs and the epoxy resin, which acts as a carbon fiber substrate. Therefore, the mechanical properties of the CFs improved.



Keywords: Carbon fiber   Microvoids defects   Modification   Liquid oligomer of acrylonitrile   Small angle X-ray scattering  
Received: 2013-10-14 Accepted: 2014-01-22 Publication Date (Web): 2014-01-24
Corresponding Authors: LIU Jian-Hong Email: jojochai2006@126.com

Fund: The project was supported by the National Key Basic Research Programs of China (973) (2011CB605603, 2011CB605605) and National Natural Science Foundation of China (21304059).

Cite this article: CHAI Xiao-Yan, ZHU Cai-Zhen, HE Chuan-Xin, ZHANG Guang-Zhao, LIU Jian-Hong. Modification of Microvoid Defects in Polyacrylonitrile-Based Carbon Fibers by a Liquid Oligomer of Acrylonitrile[J]. Acta Phys. -Chim. Sin., 2014,30 (4): 753-760.    doi: 10.3866/PKU.WHXB201401241

(1) He, F. Carbon Fiber and Graphite fiber; Chemical Industry Press: Beijing, 2010; pp 14-19. [贺福. 碳纤维及石墨纤维. 北京: 化学工业出版社, 2010: 14-19.]
(2) He, F.; Wang, R. E.; Zhao, J. G. New Chemical Materials 1999, 27, 6. [贺福, 王润娥, 赵建国. 化工新型材料, 1999, 27, 6.]
(3) Michael, D.C. International Fiber Journal 2007,4, 62.
(4) Zhang, Y.; Zhao, J. X.; Pang, D. New Chemical Materials. 2003, 31, 25. [张莹, 赵炯心, 潘鼎. 化工新型材料, 2003, 31, 25.]
(5) Jones, L.E; Thrower, P.A. Carbon 1991,29,251. doi: 10.1016/0008-6223(91)90076-U
(6) Wen, Y.; Lu Y.; Xiao H.; Qin X. Mater. Des. 2012,36,728. doi: 10.1016/j.matdes.2011.11.051
(7) Xiao, H.; Lu, Y. G; Wang, M. H. Carbon 2013,50,427.
(8) Badawy, S. M.; Dessouki, A. M. J. Phys. Chem. B 2003,107,11273. doi: 10.1021/jp034603j
(9) Xu, Z.; Huang, Y.; Min, C.; Chen, L. Radiat. Phys. Chem. 2010,79, 839. doi: 10.1016/j.radphyschem.2010.03.002
(10) Sung, M. G.; Sassa, K.; Tagawa, T.; Miyata, T.; Ogawa, H.; Doyama, M.; Yamada, S.; Asai, S. Carbon 2002, 40, 2013. doi: 10.1016/S0008-6223(02)00059-3
(11) Sung, M. G.; Kawabata, Y. Mater. Sci. Eng. A. 2008, 88, 247.
(12) Krishnomurti, P. J. Chem. Phys. 1930, 5, 473.
(13) Warren, B. E. J. Chem. Phys. 1934, 2, 551. doi: 10.1063/1.1749528
(14) Perret, R.; Ruland, W. J. Appl. Cryst. 1968, 1, 308. doi: 10.1107/S0021889868005558
(15) Perret, R.; Ruland, W. J. Appl. Cryst. 1969, 2, 209. doi: 10.1107/S0021889869006996
(16) Shioya, M.; Kobayashi, H.; Tanaka, T. Compos. Sci. Technol. 2007, 67,3209. doi: 10.1016/j.compscitech.2007.04.005
(17) Shioya, M.; Kawazoe, T.; Okazaki, R. Macromolecules 2008, 41,4758. doi: 10.1021/ma7027616
(18) Perret, R.; Ruland, W. J. Appl. Cryst. 1970, 3, 26.
(19) Zhu, C.Z.; Liu, X. F.; Yu, X.; Zhao, N.; Liu, J. H.; Xu, J. Carbon 2012, 50, 235.
(20) Sauder, C.; Lamon, J.; Pailler. R. Carbon 2004, 42, 715. doi: 10.1016/j.carbon.2003.11.020
(21) Thunemann, A. F.; Ruland, W. Macromolecules 2000, 33, 184.
(22) Thunemann, A. F.; Ruland, W. Macromolecules 2000, 33, 2626. doi: 10.1021/ma991298k
(23) Liu, Z. Y.; Zheng, J. T.; Wang, M. Z.; Zhang, B. J. Acta Phys. -Chim. Sin. 2001, 17,594. [刘振宇, 郑经堂, 王茂章, 张碧江. 物理化学学报, 2001, 17,594.] doi: 10.3866/PKU.WHXB20010704
(24) Lee , Y. S,; Lee, B.K. Carbon 2002, 40, 2461. doi: 10.1016/S0008-6223(02)00152-5
(25) Liu, J.; Tian, Y. L.; Chen, Y. J.; Liang, J. Y.; Zhang, L. F.; Fong, H. Mater. Chem. Phys. 2010,122, 548. doi: 10.1016/j.matchemphys.2010.03.045

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