High-performance yet sustainable epoxy composites: from Diels–Alder chemistry to hydrazinolytic degradation

the curing reaction of amine-epoxy system. This innovative approach markedly simplifies the production process, eliminating the need for complex syntheses and additional separation/purification steps, thereby reducing costs and enhancing economic efficiency. The resultant composites exhibit superb flame retardancy, and favorable thermal and mechanical properties. Furthermore, inspired by the Gabriel synthesis, we are the first to employ hydrazinolysis to selectively cleave bonds in DA-based epoxy composite systems, facilitating the recycling of intact carbon fibers alongside the valuable monomers such as maleic hydrazide and 1,6-hexanediamine. This one-pot synthesis strategy represents a substantial step forward in the field of sustainable materials, offering a promising and cost-effective solution for the development of high-performance, recyclable composites.