Herein, we report terahertz (THz) shielding of flexible MXene (Ti₃C₂T_x)/MWCNT/PVA polymer composite films by using THz time-domain spectroscopy (THz-TDS) in 0.1–2.0 THz frequency range. The polymer composite with 42 µm thickness exhibited an excellent shielding effectiveness of 36 dB at 2 THz which is much higher than most of the reported materials for THz shielding with comparable thickness. The absorption coefficient increases from 100 cm⁻¹ for pristine PVA to ~ 600 cm⁻¹ for 20 wt% MXene/1.5 wt% MWCNT/PVA composite. The high THz shielding of flexible MXene/MWCNT/polymer composite is ascribed to the good electrical conductivity and interfacial synergistic effect of 1D/2D nanostructures that promoted the shielding of electromagnetic waves. Our simple solution casting methodology for fabrication of thin films and subsequent high THz shielding opens possibilities to design MXene-based polymer composites for THz applications.

本文中，我们通过在0.1–2.0 THz频率范围内使用THz时域光谱（THz-TDS）报告了柔性MXene（Ti ₃ C ₂ T _x）/ MWCNT / PVA聚合物复合膜的太赫兹（THz）屏蔽。厚度为42 µm的聚合物复合材料在2 THz时具有出色的36 dB屏蔽效果，远高于报道的大多数具有相当厚度的THz屏蔽材料。吸收系数从原始PVA的100 cm ^-1增加到〜600 cm ^-1用于20重量％的MXene / 1.5重量％的MWCNT / PVA复合材料。柔性MXene / MWCNT /聚合物复合材料的高THz屏蔽归因于1D / 2D纳米结构的良好电导率和界面协同效应，从而促进了电磁波的屏蔽。我们用于薄膜制造和随后的高THz屏蔽的简单溶液浇铸方法为设计用于THz应用的MXene基聚合物复合材料提供了可能性。