Hydrogel-based strain sensor with the stretchable, self-healable and wearable properties has made great contributions in the field of modern electronics. However, currently, ultra-high stretchability and strain sensitivity are required to satisfy the practical applications for polyvinyl alcohol-borate (PVA-Borax) hydrogel-based strain sensor. Herein, we fabricated a new highly stretchable hydrogel strain sensor based on PVA-Borax and (±)-α-Thioctic acid-iron (III) (TA-Fe³⁺) double-network hydrogel matrix and multi-walled carbon nanotubes (CNTs). The strain sensors displayed an extremely wide strain-sensing range (≈1350% fracture strain) with a gauge factor of 11.50 and showed rapid recovery of electrical properties in the cut-healing cycles (<4s). Compared with previous PVA-Borax based strain sensors materials, the new double-network hydrogel strain sensors achieved more favorable functionalities in human motion monitoring, which can satisfy versatile application requirements ranging from extremely stretchable, wearable, self-healable electronic devices to future soft robot.

基于水凝胶的应变传感器具有可拉伸，自愈和可穿戴的特性，为现代电子领域做出了巨大贡献。但是，目前，需要超高拉伸性和应变敏感性来满足基于聚乙烯醇硼酸酯（PVA-Borax）水凝胶的应变传感器的实际应用。本文中，我们基于PVA-硼砂和（±）-α-硫代酸-铁（III）（TA-Fe ³⁺）双网络水凝胶基质和多壁碳纳米管（CNT）。应变传感器显示出非常宽的应变感测范围（≈1350％断裂应变），规格系数为11.50，并且在切割修复循环中（<4s）显示出快速的电性能恢复。与以前的基于PVA-Borax的应变传感器材料相比，新型双网络水凝胶应变传感器在人体运动监测中实现了更优越的功能，可以满足从极其可拉伸，可穿戴，可自愈的电子设备到未来的软机器人等多种应用需求。 。