High-performance wearable flexible strain sensors based on an AgNWs/rGO/TPU electrospun nanofiber film for monitoring human activities

IF 6.1 3区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Lu Zhang, Minghua Wu, Qun Liu, Haidong Wang
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Abstract

Abstract Wearable flexible strain sensors have attracted considerable attention in recent years, while it is still a significant challenge to fabricate wearable flexible strain sensors with high sensitivity and wide sensing range simultaneously. In this work, a high-performance wearable flexible strain sensor based on a thermoplastic polyurethane electrospun nanofibers (TPUNFs) film embedded with a silver nanowires/reduced graphene oxide (AgNWs/rGO) composite conductive material was fabricated via a simple drop-coating technique. The effect of the amount of AgNWs/rGO composite conductive material on the strain sensing range of the AgNWs/rGO/TPUNFs film flexible strain sensor was investigated, the strain sensing range of AgNWs/rGO/TPUNFs film flexible strain sensor was compared with that of the AgNWs/TPUNFs and GO/TPUNFs film flexible strain sensor, and the strain sensing properties of the AgNWs/rGO/TPUNFs film flexible strain sensor were measured. The results showed that the AgNWs/rGO/TPUNFs film flexible strain sensor with high sensitivity and wide sensing range simultaneously was achieved by compounding AgNWs and the reduced graphene oxide (rGO) conductive material. The strain sensing range of the AgNWs/rGO/TPUNFs film flexible strain sensor could be improved by increasing the amount of the AgNWs/rGO composite conductive material, and it was obviously better than that of AgNWs/TPUNFs and the rGO/TPUNFs film flexible strain sensor. The obtained AgNWs/rGO/TPUNFs film flexible strain sensor possessed high sensitivity (the gauge factor could reach a maximum of 2513.23.) as well as a wide sensing range (∼187%). Furthermore, the obtained AgNWs/rGO/TPUNFs film flexible strain sensor had a fast response/recovery time (200 ms/300 ms) and good cycling stability (∼3,000 cycles). Benefitting from the outstanding strain sensing performance, the AgNWs/rGO/TPUNFs film flexible strain sensor could detect large human motions such as finger, wrist, and knee bending as well as expression, which demonstrates great potential applications in wearable devices.
基于AgNWs/rGO/TPU静电纺纳米纤维薄膜的高性能可穿戴柔性应变传感器,用于监测人类活动
近年来,可穿戴柔性应变传感器受到了广泛的关注,但如何同时制造高灵敏度和宽传感范围的可穿戴柔性应变传感器仍然是一个重大挑战。在这项工作中,通过简单的滴涂技术,基于热塑性聚氨酯静电纺纳米纤维(TPUNFs)薄膜嵌入银纳米线/还原氧化石墨烯(AgNWs/rGO)复合导电材料,制备了高性能可穿戴柔性应变传感器。研究了AgNWs/rGO复合导电材料用量对AgNWs/rGO/TPUNFs薄膜柔性应变传感器应变传感范围的影响,将AgNWs/rGO/TPUNFs薄膜柔性应变传感器的应变传感范围与AgNWs/TPUNFs和GO/TPUNFs薄膜柔性应变传感器的应变传感范围进行了比较,并测量了AgNWs/rGO/TPUNFs薄膜柔性应变传感器的应变传感性能。结果表明,将AgNWs与还原氧化石墨烯(rGO)导电材料复合,可同时制备出高灵敏度、宽传感范围的AgNWs/rGO/TPUNFs薄膜柔性应变传感器。增加AgNWs/rGO复合导电材料的用量可以提高AgNWs/rGO/TPUNFs薄膜柔性应变传感器的应变传感范围,明显优于AgNWs/TPUNFs和rGO/TPUNFs薄膜柔性应变传感器。所获得的AgNWs/rGO/TPUNFs薄膜柔性应变传感器具有高灵敏度(测量因子最大可达2513.23.)和宽传感范围(~ 187%)。此外,所获得的AgNWs/rGO/TPUNFs薄膜柔性应变传感器具有快速的响应/恢复时间(200 ms/300 ms)和良好的循环稳定性(~ 3000次循环)。得益于出色的应变传感性能,AgNWs/rGO/TPUNFs薄膜柔性应变传感器可以检测手指,手腕和膝盖弯曲以及表情等大型人体运动,这在可穿戴设备中显示出巨大的应用潜力。
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来源期刊
Nanotechnology Reviews
Nanotechnology Reviews CHEMISTRY, MULTIDISCIPLINARY-NANOSCIENCE & NANOTECHNOLOGY
CiteScore
11.40
自引率
13.50%
发文量
137
审稿时长
7 weeks
期刊介绍: The bimonthly journal Nanotechnology Reviews provides a platform for scientists and engineers of all involved disciplines to exchange important recent research on fundamental as well as applied aspects. While expert reviews provide a state of the art assessment on a specific topic, research highlight contributions present most recent and novel findings. In addition to technical contributions, Nanotechnology Reviews publishes articles on implications of nanotechnology for society, environment, education, intellectual property, industry, and politics.
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