超柔性和机械坚固的薄膜与电加热器和伪装技术的集成为可穿戴设备的开发提供了一个有前途的平台,特别是航空航天和军事应用。在这里,我们提出了一种简单有效的一步真空辅助过滤方法,用于制造基于芳族聚酰胺纳米纤维(ANF)和Ti3C2Tx(MXene)的Janus薄膜。ANF/MXene纳米复合膜具有显著的性能,包括高电导率(23809.5S/m),优异的机械强度(102.54MPa),和出色的热稳定性(575°C)。最值得注意的是,JanusANF/MXene复合膜在低驱动电压(1-5V)下表现出优异的焦耳加热性能,加热温度高(30-276°C),和快速响应时间(5秒内)。此外,该薄膜具有有效的热伪装(温度高于163°C的物体为72°C)和出色的电磁干扰屏蔽性能(SSE/t=32475.6dBcm2/g)。这些结果表明,JanusANF/MXene薄膜具有独特的热伪装组合,焦耳加热,和电磁干扰屏蔽性能,使它们在可穿戴设备中非常有前途,高性能电加热,红外隐身,和安全保护应用程序。
The integration of ultraflexible and mechanically robust films with electric heaters and camouflage technology provides a promising platform for the development of wearable devices, especially for aerospace and military applications. Herein, we present a facile and efficient one-step vacuum-assisted filtration method for fabricating Janus films based on aramid nanofibers (ANF) and Ti3C2Tx (MXene). The ANF/MXene nanocomposite film exhibits remarkable properties, including high conductivity (23809.5 S/m), excellent mechanical strength (102.54 MPa), and outstanding thermal stability (575 °C). Most notably, the Janus ANF/MXene composite film demonstrates superior Joule heating performance with a low driving voltage (1-5 V), high heating temperature (30-276 °C), and rapid response time (within 5 s). Additionally, the film exhibits effective thermal camouflage (72 °C for objects with temperatures above 163 °C) and excellent electromagnetic interference shielding properties (SSE/t = 32475.6 dB cm2/g). These results demonstrate that Janus ANF/MXene films possess a unique combination of thermal camouflage, Joule heating, and electromagnetic interference shielding properties, making them highly promising for wearable devices, high-performance electrical heating, infrared stealth, and security protection applications.