Yu Rouhui, Wu Liang, Yang Zhonghua, Wu Jin, Chen Huifang, Pan Shaowu, Zhu Meifang
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China.
State Key Laboratory of Optoelectronic Materials and Technologies and the Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou, 510275, China.
Adv Mater. 2025 Feb;37(6):e2415268. doi: 10.1002/adma.202415268. Epub 2024 Dec 17.
Stretchable fibers with high conductivity are vital components for smart textiles and wearable electronics. However, embedding solid conductive materials in polymers significantly reduces conductive pathways when stretched, causing a sharp drop in conductivity. Here, a stretchable metastructured fiber with dynamic liquid metal-microfiber interlocking interface is reported to realize highly conductive yet ultrastable conductance. The Cu-EGaIn mixture is partially embedded within the porous microfiber mat, thereby enabling its roll-up into a spiral-layered metastructured fiber with self-compensating conductive pathways. The metastructured fiber shows outstanding performance, including high conductivity of 1.5 × 10 S m, large stretchability up to 629%, and ultrastable conductance with only 16% relative resistance change at 100% strain, which far surpasses the theoretical value. Moreover, these fibers have served as versatile platforms for wearable temperature-visualizing electrothermal fiber heaters and fully stretchable smart sensing-display fabrics. This dynamic solid-liquid interfacial interlocking strategy is promising for stretchable electronics.
高导电性的可拉伸纤维是智能纺织品和可穿戴电子产品的关键组件。然而，将固体导电材料嵌入聚合物中会在拉伸时显著减少导电路径，导致电导率急剧下降。在此，报道了一种具有动态液态金属-微纤维互锁界面的可拉伸亚结构纤维，以实现高导电性且超稳定的电导。铜-铟镓合金混合物部分嵌入多孔微纤维垫中，从而使其能够卷绕成具有自补偿导电路径的螺旋层状亚结构纤维。该亚结构纤维表现出优异的性能，包括1.5×10 S m的高电导率、高达629%的大拉伸性以及在100%应变下相对电阻变化仅16%的超稳定电导，这远远超过理论值。此外，这些纤维已成为可穿戴温度可视化电热纤维加热器和完全可拉伸智能传感显示织物的通用平台。这种动态固液界面互锁策略在可拉伸电子学方面具有广阔前景。
