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Ultrastretchable and mechanically robust ionic conductive fibers enable wearable electroluminescent electronics with large deformation tolerance and body-capacitive coupling
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AI
J
Z
Z
X
Y
刘
L
J
Y
DOI：10.1007/s10853-026-13538-6.png)
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Abstract
En 中文
Electroluminescent fibers, owing to their miniaturized geometry and intrinsic conformability to the soft, dynamically deforming human body, are emerging as pivotal components for next-generation smart textiles, wearable displays, and human–machine interaction systems. However, it remains highly challenging to develop electroluminescent fibers that simultaneously achieve ultrahigh stretchability, mechanical robustness, deformation-tolerant light emission, and human-interactive responsiveness, which are essential for reliable operation under complex human motions and diverse wearable interactive scenarios. Herein, we develop mechanically robust ionic conductive fibers through wet spinning of the polyurethane/ionic liquid system, enabling deformation-tolerant alternating current electroluminescence (ACEL) and contact-triggered luminescent responsiveness for wearable electronics. The interconnected ion-conductive network within the elastomeric polymer matrix accommodates dramatic polymer-chain deformation during stretching while sustaining continuous ion migration, thereby ensuring stable electroluminescent output under large strains. The resulting ionic conductive fibers exhibit ultrahigh stretchability up to 500% strain and an ionic conductivity of 2.8 × 10−6 S/cm, while maintaining stable mechanical performance without obvious degradation after multiple stretching cycles. Based on the body-capacitive coupling effect, the fibers can directly respond to human touch and realize interactive luminescent output. Furthermore, the fibers exhibit room-temperature self-healing capability, allowing the internal ionic liquid to reconstruct continuous ion transport pathways after fracture and restore their original conductive and luminescent performances. This work provides high-performance electroluminescent fibers as promising candidates for flexible wearable display devices and advances the development of interactive smart wearable electronics.
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