Dual-Gradient Impedance/Insulation Structured Polyimide Nonwoven Fabric for Multi-Band Compatible Stealth.

ABSTRACT: Designing and preparing a compatible electromagnetic interference (EMI) shielding, radar and infrared stealth material exhibits significant prospect in the military field. Hence, a novel conductive/magnetic polyimide-based nonwoven fabric (PFN_y) is prepared by alkali treatment, Fe³⁺ ion exchange, thermal reduction, and electroless nickel (Ni) plating process. Its impedance/insulation characteristics can be easily adjusted by controlling the in situ growth of Fe₃O₄ and electroless nickel plating. Subsequently, a new strategy of constructing hierarchical dual-gradient impedance/insulation structure is implemented to achieve EMI shielding, radar and infrared stealth via stacking PFN_y with gradually decreased impedance/insulation character

SUBMITTER: Tang X 

PROVIDER: S-EPMC12764743 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature