Effect of Carbon Fiber Surface Structure on Hygroscopic Behavior for Composites

Abstract:

Carbon fibers with different surface structure are obtained by changing the level of anodization, and have the carbon fiber and epoxy resin processed into carbon fiber-resin matrix composite. Relationship between chemical structure of carbon fiber and moisture absorption property of composite in hot and humid environment is studied. The experiments show that the surface activity of carbon fiber increase significantly after anodization treatment, and there are a large amount of increase for oxygen-containing functional groups in fiber surface, in particular to OH which increase from 17.92% to 33.25%. The moisture absorption mechanism differs in varied conditions of heat and humidity, and temperature is an important factor affecting composites hygroscopic property. The higher the carbon surface activity is, the bigger the equilibrium absorbent moisture would be, and the increase of which would cause an obvious decline in inter-level shear strength (ILSS) value of carbon fiber-epoxy composites.

• Periodical: Advanced Materials Research (Volume 700)
• Pages: 103-106
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.700.103
• Online since: May 2013
• Authors: Juan Wang, Si Yu Lai, Da Li
• Keywords: Carbon Fiber (CF), Hygroscopic Content, Hygrothermal Performance, Surface Structure

References

[1] Pillay S., Vaidya U.K. and Janowski G.M. Effects of moisture and UV exposure on liquid molded carbon fabric reinforced nylon 6 composite laminates [J]. Composites Science and Technology, 2009, 69 (6): 839-846.

DOI: 10.1016/j.compscitech.2008.03.021

[2] Yang C.J., Tian W. and Liu D.X. et al. Self-corrosion Behavior of Graphite Epoxy Composite Material [J]. Corrosion & Protection, 2008, 31 (5): 48-53.

[3] Jiao G.Q. Effects of Hygroscopic on Composite Interlaminar Fracture Toughness [J]. Aerospace Materials & Technology, 1995, 44 (6): 20-26.

[4] Wang Q.C., Jiang D.Z. and Zeng J.C. et al. Effects of Temperature and Pressure on Water Absorption of Glass Fiber Reinforced Epoxy Resin Composites [J]. Journal of National University of Defense Technology, 2010, 42 (2): 34-39.

[5] Wang H.X., Wan Y.Z. and Wang Y.L. Study on Moisture Absorption of Fiber Reinforced Light Cured Resin based Composites [J]. Fiber Reinforced Plastics/Composite, 2005, 38 (1): 18-24.

[6] Paiva M.C., Bernardo C. and Nardin M. Mechanical, Surface and Interfacial Characterization of Pitch and PAN-based Carbon Fibers [J]. Carbon, 2000, 38 (9): 1323-1337.

DOI: 10.1016/s0008-6223(99)00266-3

[7] Guo Y.X., Liu J. and Liang J.Y. Modification Mechanism of the Surface-treated PAN-based Carbon Fiber by Electrochemical Oxidation [J]. Journal of Inorganic Materials, 2009, 24 (4): 853-858.

DOI: 10.3724/sp.j.1077.2009.00853