Fibers and Polymers

, Volume 18, Issue 4, pp 795–805 | Cite as

Degradation of carbon fiber-reinforced polymer using supercritical fluids

Article

Abstract

The degradation capability of the different supercritical fluids on carbon fiber-reinforced polymer (CFRP) was analyzed based on the impact of reaction temperature and time on degradation rate; the chain scission reaction of cross-linked network in CFRP occurred in supercritical fluid was investigated based on the analysis of liquid phase products; and the recycled carbon fiber under supercritical n-butanol and n-propanol were characterized. The results indicated that supercritical n-butanol had the excellent degradation capability on CFRP, followed by supercritical acetone. The degradation capability of supercritical ethanol and n-propanol on CFRP had little difference in temperature ranged from 280 °C to 340 °C, while supercritical n-propanol was superior to ethanol under the temperature ranged from 340 °C to 360 °C. The supercritical methanol and isopropanol were disadvantageous to CFRP degradation. The liquid phase products were main the benzene derivatives and phenol derivatives by the scission of C-C, C-O and -O- bond in linear chain segment, as well as that of C-N bond in cross-linked segment of epoxy resin cure system. In comparison with the original carbon fiber, the content of N, O and Si from the recycled carbon fiber surface decreased, while the content of C increased, and the tension strength can retain above 98 % of that of the original carbon fiber.

Keywords

Recycling Degradation Fibers Resins 

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Copyright information

© The Korean Fiber Society and Springer Science+Business Media Dordrecht 2017

Authors and Affiliations

  • Huanbo Cheng
    • 1
  • Haihong Huang
    • 2
  • Jie Zhang
    • 1
  • Deqi Jing
    • 3
  1. 1.School of Mechanical EngineeringNanjing Institute of TechnologyNanjingPR China
  2. 2.School of Mechanical EngineeringHefei University of TechnologyHefeiPR China
  3. 3.Institute of Coal ChemistryChinses Academy of ScienceTaiyuanPR China

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