Abstract
Resistance change under mechanical stimuli arouses mass operational heat, damaging the performance, lifetime, and reliability of stretchable electronic devices, therefore rapid thermal heat dissipating is necessary. Here we report a stretchable strain sensor with outstanding thermal management. Besides a high stretchability and sensitivity testified by human motion monitoring, as well as long-term durability, an enhanced thermal conductivity from the casted thermoplastic polyurethane-boron nitride nanosheets layer helps rapid heat transmission to the environments, while the porous electrospun fibrous thermoplastic polyurethane membrane leads to thermal insulation. A 32% drop of the real time saturated temperature is achieved. For the first time we in-situ investigated the dynamic operational temperature fluctuation of stretchable electronics under repeating stretching-releasing processes. Finally, cytotoxicity test confirms that the nanofillers are tightly restricted in the nanocomposites, making it harmless to human health. All the results prove it an excellent candidate for the next-generation of wearable devices.
Highlights
Resistance change under mechanical stimuli arouses mass operational heat, damaging the performance, lifetime, and reliability of stretchable electronic devices, rapid thermal heat dissipating is necessary
The thermoplastic polyurethane (TPU) fibrous membrane with graphene nanoribbons (GNRs) was stuck with the dampdried TPU-boron nitride nanosheets (BNNSs) film with the side where GNRs were deposited
The polymer matrix is based on TPU, TPU-BNNS film, and TPU fibrous membrane can closely integrate together, and GNR nanonetwork was sandwiched
Summary
Resistance change under mechanical stimuli arouses mass operational heat, damaging the performance, lifetime, and reliability of stretchable electronic devices, rapid thermal heat dissipating is necessary. Wearable and flexible/stretchable strain sensors have attracted great attention nowadays because they can convert mechanical deformations into electrical signals[1,2], and are widely used in soft robotics[3,4], human–machine interaction[5], health-monitoring systems[6,7], and human motion monitoring and detection[8,9]. Compared with their traditional rigid counterparts that can bear a little strain (less than 5%)[10], flexible/. On the other hand, according to “Thermal Comfort” defined by The
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