Ti3C2Tx MXene-Ferroferric Oxide/Carbon Nanotubes/Waterborne Polyurethane-Based Asymmetric Composite Aerogels for Absorption-Dominated Electromagnetic Interference Shielding,ACS Applied Nano Materials

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Ti3C2Tx MXene-Ferroferric Oxide/Carbon Nanotubes/Waterborne Polyurethane-Based Asymmetric Composite Aerogels for Absorption-Dominated Electromagnetic Interference Shielding
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2023-03-15 , DOI: 10.1021/acsanm.3c00204
Tongcheng Zuo ₁ , Chenlu Xie ₁ , Wei Wang ₁ , Dan Yu ₁

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Absorption-dominated electromagnetic interference (EMI) shielding materials are more attractive to manage the increasing electromagnetic radiation pollution than conventional reflection-dominated counterparts due to their advantages of balancing the efficient EMI shielding performance while minimizing the secondary pollution of the reflected electromagnetic (EM) wave. Herein, we first fabricate ferroferric oxide/carbon nanotubes/waterborne polyurethane (Fe₃O₄/CNTs/WPU) aerogels and then coat Ti₃C₂T_x MXene at the bottom to construct an asymmetric structure. Moreover, the medium or transition layer is formed during the coating process of MXene-ferroferric oxide by the gravity and aerogel’s capillary action. This delicate design makes them with obvious absorption, transition, and reflection layers according to the progressive modular design principle. The composite aerogels show an average EMI shielding effectiveness (SE) of 20.06 dB, low reflectivity of 0.396, and specific EMI SE of SSE/t of 332.60 dB cm² g^–1 in the X-band when the MXene content is only 2.35 vol %. Additionally, the resultant aerogels exhibit remarkable flexible and mechanical properties, which could even bear weights of about 4500 times their own weight. In sum, this work provides a promising absorption-dominated EMI shielding candidate with flexible and high strength features.

中文翻译：

Ti3C2TX MXene-四氧化三铁/碳纳米管/水性聚氨酯基不对称复合气凝胶用于吸收主导的电磁干扰屏蔽

以吸收为主的电磁干扰 (EMI) 屏蔽材料比传统的以反射为主的同类材料在管理日益增加的电磁辐射污染方面更具吸引力，因为它们具有平衡高效 EMI 屏蔽性能同时最大限度地减少反射电磁 (EM) 波二次污染的优势. 在此，我们首先制备四氧化三铁/碳纳米管/水性聚氨酯 (Fe ₃ O ₄ /CNTs/WPU) 气凝胶，然后涂覆 Ti ₃ C ₂ T _x底部的 MXene 构建不对称结构。此外，在MXene-四氧化三铁的涂覆过程中，通过重力和气凝胶的毛细管作用形成了介质或过渡层。这种精巧的设计使它们按照渐进的模块化设计原则具有明显的吸收、过渡和反射层。复合气凝胶的平均 EMI 屏蔽效能 (SE) 为 20.06 dB，低反射率为 0.396，SSE/t 的特定 EMI SE 为 332.60 dB cm ² g ^–1当 MXene 含量仅为 2.35 vol% 时，在 X 波段。此外，所得气凝胶具有显着的柔韧性和机械性能，甚至可以承受自身重量约 4500 倍的重量。总之，这项工作提供了一种有前途的吸收主导 EMI 屏蔽候选材料，具有灵活和高强度的特点。

更新日期：2023-03-15

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