Ultra-stable strain/ humidity dual-functional flexible wearable sensor based on brush-like AgNPs@CNTs@TPU heterogeneous structure

材料科学 静电纺丝 碳纳米管 可穿戴计算机 热塑性聚氨酯 纳米技术 刷子 复合材料 计算机科学 聚合物 弹性体 嵌入式系统
作者
Zhenhao Tian,Wenjing Qin,Yanli Wang,Xinxin Li,Changshun Gu,Junji Chen,Min Yang,Lei Feng,Jianxing Chen,Hanying Qiao,Shougen Yin
出处
期刊:Colloids and Surfaces A: Physicochemical and Engineering Aspects [Elsevier]
卷期号:670: 131398-131398 被引量:7
标识
DOI:10.1016/j.colsurfa.2023.131398
摘要

Wearable flexible sensors have a broad applications prospect in human motion and health monitoring. However, designing and manufacturing ultra-stable sensors with wide operating ranges and extremely low detection limits remain a challenging task. In this paper, a heterogeneous-structured fibrous membrane was constructed using the electrospinning process and subsequent ultrasonic homogenizer treatment. The fibrous membrane is composed of brush-like thermoplastic polyurethane (TPU) fibers, which are embedded with carbon nanotubes decorated with silver nanoparticles (AgNPs@CNTs). A dual-function sensor for strain and humidity based on the fiber membrane was designed. As a strain sensor, it has an ultra-low detection limit (0.05 %), an ultra-wide sensing range of 600 %, and excellent stability (100,000 cycles of stretch/release operation at 50 % strain). As a humidity sensor, it can achieve fast response as low as 1 s. With excellent sensing capabilities in terms of strain and humidity, the fiber membrane can be used to monitor breathing, pulse, and limb movement, as well as non-contact sensing, such as sensing the vibration of guitar strings or monitoring footsteps. The versatility and manufacturability of fiber membranes provide a new way for the application of wearable sensors in health monitoring and motion tracking.
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