材料科学
标度系数
碳纳米管
复合材料
热塑性聚氨酯
纤维素
膜
拉伤
纳米技术
制作
弹性体
化学工程
工程类
病理
内科学
生物
替代医学
医学
遗传学
作者
Li Zhu,Xin Zhou,Yuhang Liu,Qiang Fu
标识
DOI:10.1021/acsami.9b00136
摘要
Advanced flexible strain sensors for human motion detection and other potential use have attracted great attention in recent years. However, the preparation of strain sensor with both high sensitivity and large workable strain range remains a challenge. In this work, the carbon nanotube (CNT) suspensions with the assistance of cellulose nanocrystals (CNC) were directly pumped into the porous electrospun thermoplastic polyurethanes (TPU) membranes through a simple filtration process to prepare the flexible strain sensors in one step. The sensitivity and workable strain range of the strain sensors are tunable by changing the mass ratios of CNTs/CNC and the total amount of hybrid fillers. With increase in the total amount of fillers, a change of filler layer from droplet to completely continuous film was observed, resulting in a sharp increase of strain sensitivity. By combining the ultraelasticity of the TPU material and the high sensitivity of hybrid fillers, the strain sensor with large workable strain range (>500%) and high sensitivity (gauge factor = 321) was successfully prepared. Its applications in visual control and full-range human body motion detection were demonstrated, showing its tremendous potential applications in future intelligent electronics.
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