Flexible sensors are becoming required in heath monitoring and human–machine interfaces, but it is still a challenge to develop flexible sensors with integrated high performances. Herein, high‐performance flexible sensors are fabricated that are self‐healing, reversibly adhesive, and utilizing stretchable hydrogels, which are composed of a pluronic F127 diacrylate (F127DA) cross‐linked poly(acrylic acid) (PAA) network and polydopamine (PDA), and further cross‐linked by Fe³⁺. The unique structure endows the resulting hydrogels (PAA‐PDA‐Fe³⁺ hydrogels) excellent self‐healing property, reversible adhesion property, mechanical stretchability, and electrical conductivity. On the basis of the excellent properties of PAA‐PDA‐Fe³⁺ hydrogels, flexible sensors with large sensing range (0–575%), high sensitivity (GF = 6.31), low response time (0.25 s), and excellent robustness (>500 cycles) are assembled and further applied in detecting both large and subtle strains induced by human motions and water ripple. Overall, this work not only provides an alternative clue to construct multi‐functional hydrogels, but also offers a new kind of high‐performance materials for flexible electronic devices, especially those for health monitoring and human–machine interface.

中文翻译：

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具有自修复，可逆粘性和可拉伸水凝胶的高性能柔性传感器，用于监测大和细微菌株

在健康监测和人机界面中越来越需要柔性传感器，但是开发具有集成高性能的柔性传感器仍然是一个挑战。在此，制造了高性能的柔性传感器，这些传感器具有自愈性，可逆性并利用可拉伸水凝胶构成，该水凝胶由普鲁尼克F127二丙烯酸酯（F127DA）交联聚丙烯酸（PAA）网络和聚多巴胺（PDA）组成），然后通过Fe ³⁺进一步交联。独特的结构赋予所得的水凝胶（PAA-PDA-Fe ³⁺水凝胶）极好的自愈性，可逆的附着性，机械拉伸性和导电性。基于PAA-PDA-Fe ³⁺的优异性能水凝胶，具有大传感范围（0–575％），高灵敏度（GF = 6.31），低响应时间（0.25 s）和出色的耐用性（> 500次循环）的柔性传感器已组装并进一步应用于检测大，细微的情况人体运动和水波纹引起的应变。总的来说，这项工作不仅为构建多功能水凝胶提供了另一条线索，而且还为柔性电子设备（尤其是用于健康监测和人机界面的电子设备）提供了一种新型的高性能材料。