Closed-loop chemical recycling and reuse of thermosetting resin-based carbon fiber composites
The increasing demand and waste volume of thermosetting resins and carbon fiber reinforced thermo-setting resin-based composites(CFRP)have brought the issue of carbon fiber recycling to our attention.However,the permanent cross-linked networks structure of the resin matrix makes it difficult for CFRP to degrade and recycle.Under the dual carbon goal,closed-loop chemical recycling has become the key to the sustainable development of thermosetting.In recent years,dynamic adaptive networks(CANs)have become one of the preferred solutions for the design and preparation of thermosetting with closed-loop chemical recycling.The article reviews the progress in closed-loop chemical recycling and reuse of CANs polymers and carbon fiber composites containing ester bonds,im-ine bonds,hexahydrotriazine structures,vinylogous urethane bonds,diketoenamine structures,and disulfide bonds.The advantages and disadvantages of their respective recycling were compared from the aspects of catalyst,tempera-ture,pH,solvents,etc.The purpose is to provide reference for the future thermosetting resin design which can be closed loop chemical recycling.
carbon fibercovalent adaptive networksclosed-loop chemical recyclingreuse of composites
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