The Latest Research Progress of New Self-Repairing Energetic Composites^†

This review summarizes research progress in self-repairing energetic composites based on the design of chemical structure of binders and the introduction of self-repairing properties between composite interfaces. Researchers have prepared the polyurethane-urea binder and the GAP self-repairing binder based on the disulfide bond, the polyurethane binder and FTPB-PDMI binder based on the Diels-Alder reaction, and the polyurethane binder based on dynamic photocrosslinking reaction. In addition, PVDF-co-HFP/EMIOTf/graphene achieves the self-repairing behavior of the polymer bonded explosive (PBX). The future development of self-repairing energetic composites is proposed. It is pointed out that the mechanical properties, processing properties and energy properties should be improved together with the introduction of self-repairing properties, and the energetic composites which can be repaired in various ways should be prepared.