A highly sensitive and stretchable strain sensor is urgently required in wearable applications. Nevertheless, high sensitivity requiring a significant structural variation even at a subtle deformation and large stretchability related to morphological integrity under a large strain are considered as two contradictory performance indicators of strain sensors. It remains a huge challenge to synchronously acquire high sensitivity and wide detection range. Herein, we prepare a strain sensor with nacre-mimetic structure through spaying Ti-O-C covalent bonding crosslinked MXene/reduced graphene oxide (rGO) (MGO) solution among the multilayer thermoplastic polyurethane (TPU) electrospun mat. The special nacre-mimetic structure and the synergistic motion of different nanosheets endow the MGO/TPU strain sensor (MGTSS) with high sensitivity (GF of 879 within 100% strain, GF of 17782 for a strain of 100%−160%, and 84326 for a strain of 160%−200%), ultra-low detection limit (0.05% strain), large detection range (up to 200% strain), short response time (70 ms) and a favorable sensing stability and durability (5000 stretching/releasing cycles). Moreover, the nacre-mimetic strain sensor can be used for sign language interpretation through monitoring finger gestures, showing great promise for applications in next-generation of wearable flexible electronics devices.

可穿戴应用迫切需要一种高灵敏度和可拉伸的应变传感器。然而，即使在微小变形下也需要显着结构变化的高灵敏度和与大应变下形态完整性相关的大拉伸性被认为是应变传感器的两个相互矛盾的性能指标。同步获取高灵敏度和宽检测范围仍然是一个巨大的挑战。在此，我们通过在多层热塑性聚氨酯 (TPU) 电纺垫中喷涂 Ti-OC 共价键交联 MXene/还原氧化石墨烯 (rGO) (MGO) 溶液来制备具有仿珍珠结构的应变传感器。特殊的珍珠层模拟结构和不同纳米片的协同运动赋予 MGO/TPU 应变传感器 (MGTSS) 高灵敏度（100% 应变内 GF 为 879，应变为 100%−160% 时 GF 为 17782，以及 84326对于 160%−200% 的应变）、超低检测限（0.05% 应变）、大检测范围（高达 200% 应变）、响应时间短（70 ms）和良好的传感稳定性和耐用性（5000 拉伸） /释放周期）。此外，珍珠层模拟应变传感器可通过监测手指手势用于手语解释，显示出在下一代可穿戴柔性电子设备中的应用前景。响应时间短（70 毫秒）和良好的传感稳定性和耐用性（5000 次拉伸/释放循环）。此外，珍珠层模拟应变传感器可通过监测手指手势用于手语解释，显示出在下一代可穿戴柔性电子设备中的应用前景。响应时间短（70 毫秒）和良好的传感稳定性和耐用性（5000 次拉伸/释放循环）。此外，珍珠层模拟应变传感器可通过监测手指手势用于手语解释，显示出在下一代可穿戴柔性电子设备中的应用前景。