College of Physics; University-Industry Joint Center for Ocean Observation and Broadband Communication; State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, 266071, Qingdao, P. R. China.
School of Physical Education, Qingdao University, 266071, Qingdao, P. R. China.
Nat Commun. 2020 Jul 15;11(1):3530. doi: 10.1038/s41467-020-17301-6.
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.
机械刺激下的电阻变化会产生大量的工作热量，从而损坏可拉伸电子设备的性能、寿命和可靠性，因此需要快速散热。在这里，我们报告了一种具有出色热管理功能的可拉伸应变传感器。除了通过人体运动监测证明的高拉伸性和灵敏度，以及长期耐久性外，注塑热塑性聚氨酯-氮化硼纳米片层的增强导热性有助于将热量快速传递到环境中，而多孔静电纺丝纤维热塑性聚氨酯膜则起到隔热作用。实时饱和温度下降了 32%。我们首次原位研究了可拉伸电子产品在重复拉伸-释放过程中的动态工作温度波动。最后，细胞毒性测试证实纳米填料被紧密限制在纳米复合材料中，对人体健康无害。所有结果都证明它是下一代可穿戴设备的优秀候选者。
