Oxidative chemical depolymerization of thermoset epoxy resin for green recycling

[Display omitted] Carbon-fibre-reinforced plastics (CFRPs) have been widely used in many fields, which has inevitably resulted in the production of large amounts of waste composites. Therefore, the recycling of high-value carbon fibres has become a topic of great interest. Thus, herein we report the...

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Bibliographic Details
Published in:Journal of industrial and engineering chemistry (Seoul, Korea) 2021, 96(0), , pp.76-81
Main Authors: Kim, Doo Hun, Yu, Ayeong, Goh, Munju
Format: Article
Language:English
Subjects:
Carbon fibre
Epoxy resin
Oxidative depolymerization
Potassium permanganate
Recycling
화학공학
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Summary:[Display omitted] Carbon-fibre-reinforced plastics (CFRPs) have been widely used in many fields, which has inevitably resulted in the production of large amounts of waste composites. Therefore, the recycling of high-value carbon fibres has become a topic of great interest. Thus, herein we report the development of a method for the decomposition of the cross-linked epoxy (EP) resin of CFRPs by oxidative depolymerization under ambient pressure in the presence of a potassium permanganate (KMnO4) solution. The decomposition mechanism was also examined, and the reaction rate constant was determined to be 2.45×10−2min−1 in a 1M KMnO4 solution. In addition, the tensile strength of the reclaimed CF was 3.20GPa, which is 90.65% the value of the virgin CF. These results indicate that our developed method is suitable for the efficient reclamation of high-quality carbon fibres from CFRP scrap.
ISSN:1226-086X
1876-794X
DOI:10.1016/j.jiec.2021.01.047