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Published on: December 27, 2012
Heterolayered Carbonized MXene/Polyimide Aerogel for Low-Reflection Electromagnetic Interference Shielding
Shan Zhang1,2, Chen-Ming Liang1,2, Lu Zhou1,2
1State Key Laboratory of Bioinspired Interfacial Materials Science, Bioinspired Science Innovation Center, Hangzhou International Innovation Institute, Beihang University, Hangzhou, 311115, People's Republic of China.
None:
The advancement of next-generation high-frequency communication systems and stealth detection technologies necessitate the development of efficient, multi-spectrum compatible shielding materials. However, the achievement of simultaneous high efficiency and low reflectivity across microwave, terahertz, and infrared spectra remains a formidable challenge. Herein, a carbonized MXene/polyimide (C-MXene/PI) aerogel material integrating a spatially coupled hierarchically anisotropic structure with stepwise conductivity gradients was constructed. Electromagnetic waves propagate through the top-down vertical disordered horizontal architecture and progressive conductivity gradient of C-MXene/PI aerogel, undergoing stepwise absorption-dissipation-re-dissipation processes. The C-MXene/PI aerogel exhibits an average electromagnetic interference (EMI) shielding effectiveness of 91.0 dB in X-band and a reflection coefficient of 0.40. In the terahertz frequency band, the average EMI shielding performance reaches 66.2 dB with a reflection coefficient of 0.33. Furthermore, the heterolayered porous architecture of C-MXene/PI aerogels exhibits low thermal conductivity and reduced infrared emissivity, enabling exceptional infrared stealth capability across the 2-16 μm wavelength spectrum. This study provides an feasible strategy for constructing low-reflectivity multi-spectrum compatible shielding materials.
