The highly stretchable, flexible and self-healing strain sensor is considered as a promising wearable device for motion detection in fields such as robotics and human-machine interface. Herein, a strain sensor with high stretchability and sensitivity is designed and fabricated based on the poly(acrylamide) (PAAm) hydrogel. The ionic conductive PAAm hydrogel shows an excellent self-healing property with fast electrical self-healing speed (within 1.8 s) and high self-healing efficiency (99%). The PAAm hydrogel based strain sensor exhibits excellent performance with large stretchability (>900%), high sensitivity (with maximum gauge factor of 6.44), fast response time (~150 ms), and good cycling durability (>3000 cycles). As the wearable device, the strain sensor can detect various human motions and is able to transmit the data to the smart phone combined with a readout and wireless system. Furthermore, a smart glove was fabricated by coupling multiple strain sensors and the corresponding circuit. The smart glove is capable of expressing and recognizing American Sign Language and can be used to control a robotic hand wirelessly through the hand gestures. Thus, the highly stretchable, self-healing hydrogel-based strain sensor shows a potential application for the human-machine interface, personal healthcare and sports training.

高度可拉伸，灵活且自愈的应变传感器被认为是在机器人技术和人机界面等领域进行运动检测的有希望的可穿戴设备。在此，基于聚（丙烯酰胺）（PAAm）水凝胶设计并制造了具有高拉伸性和灵敏度的应变传感器。离子导电PAAm水凝胶显示出优异的自修复性能，具有快速的电自修复速度（在1.8 s内）和高的自修复效率（99％）。基于PAAm水凝胶的应变传感器具有出色的性能，具有较大的可拉伸性（> 900％），高灵敏度（最大规格系数为6.44），快速响应时间（〜150 ms）和良好的循环耐久性（> 3000次循环）。作为可穿戴设备，应变传感器可以检测人类的各种动作，并且可以将数据与读数和无线系统结合起来传输到智能手机。此外，通过耦合多个应变传感器和相应的电路来制造智能手套。智能手套能够表达和识别美国手语，并可用于通过手势无线控制机器人手。因此，高度可拉伸，自修复的基于水凝胶的应变传感器显示出在人机界面，个人医疗保健和运动训练方面的潜在应用。智能手套能够表达和识别美国手语，并可用于通过手势无线控制机器人手。因此，高度可拉伸的，自修复的基于水凝胶的应变传感器在人机界面，个人医疗保健和运动训练中显示出潜在的应用。智能手套能够表达和识别美国手语，并可用于通过手势无线控制机器人手。因此，高度可拉伸，自修复的基于水凝胶的应变传感器显示出在人机界面，个人医疗保健和运动训练方面的潜在应用。