Research progress on recycling and reutilization technology of carbon fiber thermosetting composites

The extensive application of high-performance carbon fiber reinforced polymer (CFRP) composites poses severe challenges to their waste disposal, particularly for carbon fiber thermosetting composites. To promote the green and sustainable development of carbon fiber industry, this paper systematically reviews recycling technologies for CFRP composites from multiple perspectives (mechanical, pyrolysis, chemical and novel recycling technologies), including fundamental mechanisms, parameter optimization, recycled carbon fiber performance, as well as their merits and drawbacks. Meanwhile, various processes for refabricating recycled carbon fibers and properties of regenerated products were reviewed. Finally, the development trend of recycling technologies was discussed.