With the rapid development of 5G communication technology and intelligent detection technology, electromagnetic shielding/infrared stealth fabrics with Joule/solar heating performance can meet the needs of wearable electronic devices for multi-application scenarios. Two-dimensional (2D) transition metal carbides and nitrides (MXenes) are ideal candidates for constructing efficient conductive networks in EMI SE fabrics due to their layered structure and high conductivity. However, it is difficult for MXene nanosheets to assemble into excellent interconnected conductive networks due to the irregular size and stacking of MXene sheets after MXene etching. Inspired by transport of nutrients by roots, a three-dimensional (3D) efficient conductive network was constructed by bridging one-dimensional (1D) Ag nanowires (AgNWs) into the highly conductive 2D MXenes, and a series of flexible multifunctional MXene@AgNW/cotton fabrics with excellent EMI SE performance was obtained. The average EMI SE value of MXene@AgNW/cotton fabrics can reach 70.6 dB in the X band. The oxidation resistance of the fabric is enhanced after spraying perfluorooctyltriethoxysilane (PFOTES) on the surface, and the surface water contact angle reaches 135.1°, providing excellent self-cleaning performance. MXene@AgNW/cotton fabric exhibits an average infrared emissivity of 0.25 (3–5 μm) and 0.17 (8–14 μm), showing excellent camouflage capability for infrared thermal signals under an infrared camera, generating a temperature difference of about 132.2 °C with a hot stage at 200 °C. MXene@AgNW/cotton fabric shows good electrical heating performance under low voltage loading (temperature reaches 150 °C at 3.5 V) and it also exhibits photothermal properties, showing a temperature of 120 °C under light density irradiation of 1900 W m⁻² within 180 s, which can realize the functions of hot compress therapy and cold preservation. The limiting oxygen index (LOI) value of MXene@AgNW/cotton fabric is 27.5%, which proves that MXene@AgNW/cotton fabric exhibits fire safety in practical applications. This work provides a paradigm for the construction of flexible multifunctional EMI SE fabrics.

中文翻译：

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灵活的多功能MXene@Ag纳米线/棉织物，其灵感来自根部的营养物质运输，用于电磁屏蔽、红外隐身、焦耳/太阳能加热和阻燃


随着 5G 通信技术和智能检测技术的快速发展，具有焦耳/太阳能加热性能的电磁屏蔽/红外隐形织物可以满足可穿戴电子设备多应用场景的需求。二维 （2D） 过渡金属碳化物和氮化物 （MXenes） 由于其层状结构和高导电性，是在 EMI SE 织物中构建高效导电网络的理想选择。然而，由于 MXene 刻蚀后 MXene 片的尺寸和堆叠不规则，MXene 纳米片很难组装成出色的互连导电网络。受根系营养物质运输的启发，通过将一维 （1D） Ag 纳米线 （AgNWs） 桥接到高导电性 2D MXenes 中，构建了三维 （3D） 高效导电网络，获得了一系列具有优异 EMI SE 性能的柔性多功能MXene@AgNW/棉织物。MXene@AgNW/棉织物的平均 EMI SE 值在 X 频段可达 70.6 dB。在表面喷涂全氟辛基三乙氧基硅烷 （PFOTES） 后，织物的抗氧化性增强，表面水接触角达到 135.1°，提供优异的自清洁性能。MXene@AgNW/棉织物的平均红外发射率为 0.25 （3–5 μm） 和 0.17 （8–14 μm），在红外相机下表现出优异的红外热信号伪装能力，在 200 °C 的热阶段产生约 132.2 °C 的温差。MXene@AgNW/棉织物在低压负载下表现出良好的电加热性能（温度在 3.5 V），并且它还表现出光热特性，在 1900 W ^m-2 的光密度照射下，在 180 s 内显示 120 °C 的温度，可以实现热敷疗法和冷保存的功能。MXene@AgNW/棉织物的极限氧指数 （LOI） 值为 27.5%，证明MXene@AgNW/棉织物在实际应用中表现出防火安全性。这项工作为构建柔性多功能 EMI SE 织物提供了一种范例。