Multifunctional Green Electromagnetic Interference Shielding Material for the Sub-6-GHz Band AITranslate

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DOI：https://doi.org/10.1021/acsaelm.2c01250

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Multifunctionality, green, flexibility, and low reflectivity are promising development tendencies of electromagnetic interference (EMI) shielding materials. However, it is still a challenge to effectively integrate multiple functions into a single material. Herein, we reported a multifunctional, green, and flexible EMI shielding material with low reflection. It is a multilayer structure consisting of a low-infrared emission layer, a polyvinyl chloride (PVC) compensation layer, and a microwave absorption layer. The shielding effectiveness (SE) of the proposed multifunctional material can reach above 28 dB with a green index gs ≥ 1 and reflection loss SER < 3.01 dB in the sub-6 GHz band. Furthermore, an ultralow infrared (IR) emissivity of 0.17 within the 3–15 μm spectrum is obtained by optimizing the pattern of the indium tin oxide (ITO) part. The designed material is also optically transparent, flexible, wide-angle, low-profile, and polarization-insensitive. Excellent consistency between the experimental and simulation results demonstrates that this multifunction shielding material can find practical applications in signal shielding scenarios in the sub-6G microwave and 3–15 μm infrared regimes.