Stretchable electronic devices are of use in the development of bioelectronics, wearable devices and healthcare monitoring. Liquid-metal-based stretchable devices are of particular interest for such systems but typically require complex manufacturing processes and suffer from poor interfacial adhesion between the liquid metal and polymeric substrates. Here we show that a membrane of electrospun polymer fibres containing semi-embedded liquid metal particles can be used to make stretchable electronics. The liquid metal particles within the fibre network rupture under pressure and fill the gaps in the fibre mesh to form conductive regions. This enables the creation of circuits with high resolution (minimum linewidths of 50 µm) and stability (over 30,000 cycles of 100% strain) using circuit-patterned stamps. The circuits can be integrated with various electronic components to achieve different functions, including square wave signal output, light emission and wireless charging. We used this approach to create sensors for bioelectrical signal monitoring, thus illustrating the biocompatibility and permeability of the membranes. We also show that the liquid-metal-containing fibre membranes can be separated into their individual components and recycled.

可拉伸电子设备可用于生物电子学、可穿戴设备和医疗保健监测的开发。基于液态金属的可拉伸装置对于此类系统特别感兴趣，但通常需要复杂的制造工艺，并且液态金属和聚合物基底之间的界面粘合性较差。在这里，我们展示了含有半嵌入液态金属颗粒的电纺聚合物纤维膜可用于制造可拉伸电子产品。纤维网内的液态金属颗粒在压力下破裂并填充纤维网中的间隙，形成导电区域。这使得使用电路图案印模创建具有高分辨率（最小线宽为 50μm）和稳定性（超过 30,000 次 100% 应变循环）的电路成为可能。该电路可以与各种电子元件集成以实现不同的功能，包括方波信号输出、发光和无线充电。我们使用这种方法创建了用于生物电信号监测的传感器，从而说明了膜的生物相容性和渗透性。我们还表明，含液态金属的纤维膜可以分离成单独的组件并回收利用。