High-frequency radio technology, especially fast-growing terahertz technology, brings great convenience to human life but also raises concern about electromagnetic interference. However, it still lacks a high-performance shielding material containing the features of a high shielding bandwidth (in both GHz and THz bands), high shielding effectiveness (SE), high mechanical strength, and small thickness. Here, an ultrathin and flexible polypyrrole/Ti₃C₂T_x (PPy/Ti₃C₂T_x) film with high electromagnetic interference (EMI) shielding performance and high mechanical property was constructed by a vacuum filtration and hot-press process. The inserted PPy chains tightly connected each Ti₃C₂T_x nanosheet, acting as both the out-of-plane electron–transport pathways and elastic hinges between the nanosheets. With only 9 wt% of PPy, an as-fabricated PPy/Ti₃C₂T_x film showed the highest conductivity of ∼780 000 S m⁻¹ and highest tensile strength of ∼200 MPa. The enhanced conductivity and compressed multilayer structure brought remarkable GHz and THz EMI shielding performance. A highest average EMI SE value of 64.5 dB in the GHz range (8.2–40.0 GHz) and a highest value of 71.4 dB in the THz range (0.2–1.6 THz) were delivered by the PPy/Ti₃C₂T_x sample with an ultrasmall thickness of 4 μm. The outstanding comprehensive performances of the PPy/Ti₃C₂T_x film demonstrate its great potential in EMI shielding for next-generation smart and wearable electronics.

中文翻译：

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用于宽带千兆赫和太赫兹电磁干扰屏蔽的超薄、柔性和高强度聚吡咯/Ti3C2Tx 薄膜

高频无线电技术，尤其是快速发展的太赫兹技术，在给人类生活带来极大便利的同时，也引发了人们对电磁干扰的担忧。然而，它仍然缺乏具有高屏蔽带宽（在GHz和THz波段）、高屏蔽效率（SE）、高机械强度和薄厚度等特点的高性能屏蔽材料。在这里，通过真空过滤和热压工艺构建了一种具有高电磁干扰（EMI）屏蔽性能和高机械性能的超薄柔性聚吡咯/Ti ₃ C ₂ T _x（PPy/Ti ₃ C ₂ T _{x ）薄膜。}插入的 PPy 链紧密连接每个 Ti₃ C ₂ T _x纳米片，充当面外电子传输路径和纳米片之间的弹性铰链。只有 9 wt% 的 PPy，制成的 PPy/Ti ₃ C ₂ T _x薄膜表现出最高的电导率 ~780 000 S m ^-1和最高的拉伸强度 ~200 MPa。增强的导电性和压缩的多层结构带来了卓越的GHz和THz EMI屏蔽性能。_{PPy/Ti 3} C ₂ T _x在 GHz 范围 (8.2–40.0 GHz) 中的最高平均 EMI SE 值为 64.5 dB，在太赫兹范围 (0.2–1.6 THz) 中的最高值为 71.4 dB样品厚度为 4 μm。PPy/Ti ₃ C ₂ T _x薄膜优异的综合性能展示了其在下一代智能和可穿戴电子产品EMI屏蔽方面的巨大潜力。