High-strength, flexible, and multifunctional characteristics are highly desirable for electromagnetic interference (EMI) shielding materials to meet lightweight applications in the electric industry. Herein, we report a sustainable bioinspired double-network structural material connected by a hydrogen-bonded interface, that enables the creation of hybrid dual-networks benefiting from the mono-dispersion of aramid nanofibers (ANFs) and single-walled carbon nanotubes (SWCNTs). By directional filtration, the dual networks of the ANF/SWCNT composite films can be constructed into a laminated structure with preferential orientation during the stretching process, resulting in high fracture strength (113.45 MPa) and low breaking strain (<2%). Simultaneously, the as-prepared film delivers an adjustable electrical conductivity (131.9–798.57 S/cm), a remarkable EMI SE (43.01–75.28 dB), and high specific shielding effectiveness (SSE/t) of 1.281 × 10⁴ dB cm² g⁻¹, which shows outstanding performance among the reported state-of-the-art SWCNT-based materials. More importantly, the films show excellent Joule heating performance with a fast thermal response (<15 s), a low driving voltage (0.5–5 V), and a wide temperature response range (89–445 °C). As such, the multifunctional composite films are considered as promising alternatives to a wide range of lightweight applications in electromagnetic shielding and thermal management.

高强度、柔性和多功能特性是电磁干扰（EMI）屏蔽材料非常需要的，以满足电力行业的轻量化应用。在此，我们报告了一种通过氢键界面连接的可持续仿生双网络结构材料，该材料能够创建受益于芳纶纳米纤维（ANF）和单壁碳纳米管（SWCNT）单分散的混合双网络。通过定向过滤，ANF/SWCNT复合薄膜的双网络可以在拉伸过程中构建成具有择优取向的层状结构，从而获得高断裂强度（113.45 MPa）和低断裂应变（<2%）。同时，所制备的薄膜具有可调节的电导率（131.9–798.57 S/cm），⁴  dB cm ²  g ^-1，在已报道的最先进的基于SWCNT的材料中表现出出色的性能。更重要的是，这些薄膜表现出优异的焦耳热性能，具有快速热响应（<15 s）、低驱动电压（0.5-5 V）和宽​​温度响应范围（89-445 °C）。因此，多功能复合薄膜被认为是电磁屏蔽和热管理领域广泛的轻质应用的有前途的替代品。