Wearable electronics with miniaturization and high-power density call for devices with advanced thermal management capabilities, outstanding flexibility, and excellent permeability. However, it is difficult to achieve these goals simultaneously due to the conflict between high thermal conductivity and permeability and flexibility. Here, we report an approach to fabricate flexible, breathable composites with advanced thermal management capability by coating the boron nitride nanosheets (BNNSs) layer with high thermal conductivity on the grids of patterned electrospun thermoplastic polyurethane (TPU) fibrous mats. The composite exhibited a significant enhancement of thermal conductivity and preserved instinctive breathability simultaneously. When the composite was integrated into flexible devices, its saturating operating temperature dropped significantly compared to that of pure Ecoflex packaging. Moreover, the surface temperature fluctuation was less than 0.5 °C during more than 2000 cycles bending-releasing process. Finally, a prototype to fabricate wearable electronics with advanced thermal management capability was proposed.

具有小型化和高功率密度的可穿戴电子产品需要具有先进的热管理能力、出色的灵活性和出色的渗透性的设备。然而，由于高导热性和渗透性和柔韧性之间的冲突，很难同时实现这些目标。在这里，我们报告了一种通过在图案化电纺热塑性聚氨酯 (TPU) 纤维垫的网格上涂覆具有高导热性的氮化硼纳米片 (BNNS) 层来制造具有先进热管理能力的柔性、透气复合材料的方法。该复合材料的导热性显着增强，同时保持了本能的透气性。当复合材料被集成到柔性设备中时，与纯 Ecoflex 包装相比，其饱和工作温度显着下降。此外，在超过2000次弯曲释放过程中，表面温度波动小于0.5°C。最后，提出了一种制造具有先进热管理能力的可穿戴电子产品的原型。