A new route to fabricate flexible, breathable composites with advanced thermal management capability for wearable electronics

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