Zhang Yue, Ming Zechang, Zhou Zijie, Wei Xiaojie, Huang Jingjing, Zhang Yufan, Li Weikang, Zhu Liming, Wang Shuang, Wu Mengjie, Lu Zeren, Zhou Xinran, Xiong Jiaqing
State Key Laboratory of Advanced Fiber Materials, College of Textiles, Donghua University, Shanghai, China.
College of Materials Science and Engineering, Donghua University, Shanghai, China.
Nat Commun. 2025 Jul 23;16(1):6785. doi: 10.1038/s41467-025-62140-y.
Temperature-adaptive elastic conductive fibers (ECFs) are crucial for seamlessly integrating electronic textiles, promoting the development of wearables, soft robotics, and high/low-temperature electronics. Realizing ECFs with balanced elasticity, conductivity, and temperature adaptivity remains challenging due to the difficulty of coupling the mechano-electrical-thermal properties at a microscale fiber. We design a wet-spun ECF consisting of thermoplastic polyurethane (TPU), silver flakes (AgFKs) and liquid metal microspheres (LMMSs) with regularly arranged filler architecture, revealing a cold/thermal stretching activated tricomponent-dynamic-coordination mechanism for autonomously-enhanced electrical conductivity (from ~1070 S cm at 25 °C to 1160 S cm at -30 °C and 3020 S cm at 180 °C) and improved electrical stability to sustain 1000 stretching cycles (60% strain at 80 °C). The fiber exhibits scalability and favorable knittability, demonstrating e-textiles such as biomedical electrodes, high/low-temperature near-field communication gloves, and intelligent firefighting suits. The autonomous mechano-thermo-electrical coupling strategy can inspire high-performance and environment-adaptive ECFs for extreme applications.
温度自适应弹性导电纤维（ECF）对于无缝集成电子纺织品、推动可穿戴设备、软体机器人以及高/低温电子产品的发展至关重要。由于在微观尺度纤维上耦合机械-电气-热性能存在困难，实现具有平衡弹性、导电性和温度适应性的ECF仍然具有挑战性。我们设计了一种由热塑性聚氨酯（TPU）、银片（AgFKs）和液态金属微球（LMMSs）组成且具有规则排列填料结构的湿法纺丝ECF，揭示了一种冷/热拉伸激活的三组分动态配位机制，可实现自主增强的电导率（从25°C时的约1070 S cm提升至-30°C时的1160 S cm以及180°C时的3020 S cm），并提高电稳定性以承受1000次拉伸循环（80°C下60%应变）。该纤维具有可扩展性和良好的可编织性，展示了诸如生物医学电极、高/低温近场通信手套和智能消防服等电子纺织品。自主机械-热-电耦合策略可为极端应用激发高性能和环境适应性的ECF。
