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, Fe 3+ 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 Fe 3 O 4 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…

• NN
  National Natural Science Foundation of China

  Award: 52373077
• CP
  China Postdoctoral Science Foundation

  Award: 2024M760348