High-Performance Flexible Electromagnetic Wave Absorber through Synergistic Regulation of Matching and Reflective...

Area of Science:

• Materials Science
• Electromagnetics
• Nanotechnology

Background:

• Layered fabrics are crucial for electromagnetic wave absorption (EMA) in complex environments.
• Understanding the structure-performance relationship in layered EMA materials is essential for design optimization.
• Current designs often rely on empirical rules, limiting predictable performance.

Purpose of the Study:

• To develop a high-performance bilayer EMA fabric with enhanced electromagnetic wave attenuation.
• To elucidate the structure-performance relationship concerning interlayer reflection and electromagnetic attenuation.
• To provide empirical guidance for designing advanced layered EMA fabrics.

Main Methods:

• Fabrication of a bilayer absorber (CuPRS) using rGO/SiC-filled polyimide as the matching layer and a metallized polyimide nonwoven as the reflective layer.
• Systematic investigation of the synergistic effects between interlayer reflection and electromagnetic attenuation.
• Analysis of the role of moderate interlayer reflection and loss capability in wave dissipation.

Main Results:

• The CuPRS bilayer absorber achieved a minimum reflection loss (RLmin) of -73.08 dB at a thickness of 1.88 mm.
• Demonstrated a significant performance enhancement ('1 + 1 > 2') due to synergistic effects.
• Clarified the critical role of coordinating interlayer reflection and electromagnetic attenuation for effective energy dissipation.

Conclusions:

• Coordinating moderate interlayer reflection with appropriate loss capability is key for effective EMA.
• The developed bilayer fabric offers a promising approach for next-generation EMA materials.
• This work provides valuable insights for the rational design of layered EMA fabrics.