基于高强韧自修复聚氨酯的柔性应变传感器制备及其性能

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中图分类号：TB34；TP212.1 文献标志码：A 文章编号：1671-024X（2025）03-0031-08

Fabrication and properties of flexible strain sensor based on highly tough and self-healingpolyurethane

YANG Guang 1，2 ， DING Yunpeng1，2， XING Renquan1，2，， TANG Xinchao 1，2 ， YAN Jing 1，2 （1.School ofTextile ScienceandEngineering，Tiangong University，Tianjin3Oo387，China；2.Research CenterforFuture Textile Technology，Tiangong University，Tianjin 30o387，China）

Abstract：Toaddressthe performance failure issues due to fatigue or mechanical damage in flexible strain sensors during use，this study prepared a high-toughness，self-healing polyurethane based ona multi-hydrogen bond network. Bycompositing it with conductive antimony tin oxide（ATO） nanofibers，a highlystable，self-healing flexible strain sensor was developed and extensivelycharacterized for its mechanical and sensing properties.Results indicate that the fabricated self-healing polyurethane exhibitsa9Oo% elongationatbreak anda tensile strengthof 8 MPa.The flexible strain sensor constructed fromthis polyurethane demonstrates a sensitivityas high as 240 withinastrain range of 4O%and maintains excellent cyclic stability.Additionally，thanks to the dynamic hydrogen bonding network of polyurethane，the sensor can fuly recoverits initial mechanical and sensing performance after being damaged by heating.

Keywords：flexible strain sensor;self-healing；polyurethane;toughness

柔性应变传感器能够在拉伸、弯曲和扭转状态下工作，可有效满足智能可穿戴电子设备的需求，这使其在人造皮肤、运动检测、健康监测和人机交互等领域受到了极大关注[-5]。（剩余14294字）