Flexible and wearable strain sensors with multi-functionalities have aroused tremendous attention for various applications in disease diagnostics, environment detection and healthcare monitoring, etc. However, limited electromechanical performance and complicated fabrication process of strain sensors restrict their extensive applications in full-range stimuli monitoring. Herein, we fabricated flexible and wearable strain sensors, consisting of a robust fiber with helical structure and two polyaniline (PANI) layers bridged by reduced graphene oxide (rGO) layer through in-situ polymerization and ultrasonication. The flexible and wearable sensor possesses wide healthcare monitoring range (0.1%–200% strain), high sensibility especially for subtle deformation, excellent response stability, fast response/recovery time (100 ms/100 ms) and favorable durability. Meanwhile, our conductive PANI-rGO-PANI fiber (CPGPF) is assembled as a wearable sensor with the capability of precisely monitoring human body motions, temperature fluctuation and poisonous gas, indicating a promising multifunctional application in human-machine interaction and environment monitoring.

具有多功能功能的柔性可穿戴应变传感器引起了疾病诊断，环境检测和医疗保健监测等各种应用的极大关注。然而，应变传感器的机电性能有限和制造工艺复杂限制了其在全范围刺激监测中的广泛应用。 。在这里，我们制造了柔性且耐磨的应变传感器，该传感器由具有螺旋结构的坚固纤维和两个聚苯胺（PANI）层组成，该两个聚苯胺层通过原位聚合和超声处理被还原的氧化石墨烯（rGO）层桥接。灵活且可穿戴的传感器具有广泛的医疗监控范围（0.1％–200％应变），高灵敏度（尤其是对于微小变形），出色的响应稳定性，快速的响应/恢复时间（100毫秒/ 100毫秒）和良好的耐久性。同时，我们的导电PANI-rGO-PANI纤维（CPGPF）被组装为可穿戴传感器，具有精确监测人体运动，温度波动和有毒气体的能力，表明在人机交互和环境监测中具有广阔的应用前景。