A fully integrated wearable electronic device with breathable and washable properties for long-term health monitoring

The fully-integrated wearable electronic device with breathable and washable properties for long-term health monitoring. (a) The fully-integrated wearable electronic device attached to the skin and signals acquisition with a cellphone. (b) Multifunctional modules for the device: laser reduced graphene-cellulose temperature sensor (LRG-TS), thermal reduced graphene-cellulose pressure sensor (TRG-PS) and flexible printed circuit board (FPCB). (c) Schematic of breathability and washability of the fully-integrated wearable electronic device. [Display omitted] •The first implementation of a fully-integrated wearable electronic device with multifunctional modules through a facile and scalable paradigm.•Two unparalleled properties (breathability and washability) are compatible to varying environmental conditions (e.g., mechanical, thermal or hydrated environment) from normal to extreme conditions, holding great promise for versatile wearable electronics applications in long-term healthcare monitoring.•Alleviating user discomfort in long-term healthcare monitoring via excellent breathability demonstrated in rabbit skin in vitro.•Withstanding some special situations (e.g., functional failure due to being creased, sweating or raining) with structural integrity and functional performance in long-term healthcare monitoring via preferred washability.•The fully-integrated wearable electronic device can monitor body temperature and human motions (voice, swallowing, cough, pulse, etc.) for at least 7 days with results readable by a mobile phone through Bluetooth. The fully integrated wearable electronics have recently found widespread applications in long-term health monitoring, where one major challenge is to develop substrate materials with excellent breathability and washability. In this work, we developed a fully integrated wearable electronic device with breathable and washable properties through a facile and scalable paradigm. We directly mixed hydrophilic graphene oxide with hydrophilic cellulose fibers to ensure that graphene nanosheets uniformly spread all over the paper matrix. Then laser reduction was applied to fabricate a graphene-cellulose temperature sensor (LRG-TS), and thermal reduction to make a graphene-cellulose pressure sensor (TRG-PS), both of which were then connected with a flexible printed circuit board (FPCB) to form a fully integrated wearable electronic device with results readable by a mobile phone through Bluetooth. The excellent breathabilit