Multi-Field Coupled Motion Induces Electromagnetic Wave Absorbing Property Regeneration of Elastomer in Marine Environment

The mechanical-electromagnetic dual healing system equips warships with the same reproducibility as biological skin, enabling rapid restoration of electromagnetic stealth and overcoming disturbances in the marine environment. However, the principle of electromagnetic wave absorption (EWA) property regeneration and co-healing model are still largely unknown. Herein, a bio-inspired intelligent elastomer is created that combines 2D EWA mediums with an underwater self-healing fluoropolymer framework, realizing multifunctional integration. It demonstrates excellent broadband EWA characteristics (8.68 GHz, 2.16 mm) and promising underwater self-healing (23.73%, 3 h). Notably, the dynamic interweaving motion between chemical and physical fields (i.e., dielectric and magnetic fields) facilitates positive chain effects of mechanical healing on electromagnetic function. Consequently, this interdependence drives efficient EWA property regeneration (94.1%, 3 h), including but not limited to underwater and air. Furthermore, the system boasts excellent hydrophobicity and chemical stability for seawater and strong alkali. Overall, this work is the first to present an effective strategy for quickly restoring electromagnetic stealth in marine environments, which expands the feasibility boundary of the interdisciplinarity.