Preparation and characterization of a polyimide coating on the surface of carbon fibers

YUAN Hao-jie; LU Chun-xiang; ZHANG Shou-chun; Wu Gang-ping

doi:10.1016/S1872-5805(15)60179-2

Volume 30 Issue 2

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YUAN Hao-jie, LU Chun-xiang, ZHANG Shou-chun, Wu Gang-ping. Preparation and characterization of a polyimide coating on the surface of carbon fibers. New Carbon Mater., 2015, 30(2): 115-121. doi: 10.1016/S1872-5805(15)60179-2

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YUAN Hao-jie, LU Chun-xiang, ZHANG Shou-chun, Wu Gang-ping. Preparation and characterization of a polyimide coating on the surface of carbon fibers. New Carbon Mater., 2015, 30(2): 115-121. doi: 10.1016/S1872-5805(15)60179-2

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Preparation and characterization of a polyimide coating on the surface of carbon fibers

doi: 10.1016/S1872-5805(15)60179-2

1.
National Engineering Laboratory for Carbon Fiber Technology, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds: National Natural Science Foundation of China (50602045).

Received Date: 2015-02-16
Accepted Date: 2015-05-04
Rev Recd Date: 2015-04-01
Publish Date: 2015-04-28

Abstract

Abstract

Organic, solvent-free polyamic acid sizing was coated onto T300 grade carbon fibers (3k) to prepare a polyimide (PI) coating having a high thermal stability and oxidative resistance. The surface of PI-coated carbon fibers was characterized by FTIR and SEM. The mechanical strength of the carbon fibers, thermal stability and oxidative resistance of the coating were also investigated. Results indicate that a continuous and uniform PI coating is formed on the surface of the carbon fibers. Compared to a carbon fiber coating with epoxy, the PI coating produces excellent thermal stability with onset decomposition and a 5% weight-loss temperatures of 567 and 619 ℃, respectively. The tensile strength of PI-coated carbon fibers after thermal oxidation in air at 400 ℃ for 1 h has only a slight decrease of 6%, which is significantly lower than the decrease of 22% for epoxy-coated fibers.
- Carbon fiber,
- Surface modification,
- Thermal stability,
- Polyimide coating

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References(28)

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