材料科学
电容感应
标度系数
纤维
复合材料
导电体
可穿戴技术
可穿戴计算机
压力传感器
热的
热导率
光电子学
数码产品
纳米技术
制作
多孔性
电气工程
机械工程
计算机科学
气象学
嵌入式系统
病理
替代医学
工程类
物理
医学
作者
Yunfei Yu,Guangchao Zheng,Kun Dai,Wei Zhai,Kangkang Zhou,Yanyan Jia,Guoqiang Zheng,Zhicheng Zhang,Chuntai Liu,Changyu Shen
出处
期刊:Materials horizons
[The Royal Society of Chemistry]
日期:2021-01-01
卷期号:8 (3): 1037-1046
被引量:62
摘要
Wearable smart devices should be flexible and functional to imitate the warmth and sensing functions of human skin or animal fur. Despite the recent great progress in wearable smart devices, it is still challenging to achieve the required multi-functionality. Here, stretchable hollow-porous fibers with self-warming ability are designed, and the properties of electrical heating, strain sensing, temperature sensing and pressure sensing are achieved. The hollow-porous TPU fiber possesses an ultra-high stretchability (1468%), and the textiles woven from the fibers present a splendid thermal insulation property (the absolute value difference in temperature |ΔT| = 68.5 and 44 °C at extreme temperatures of 115 and -40.0 °C). Importantly, after conductive filler decoration, the fiber-based strain sensor exhibits one of the highest reported gauge factor (2.3 × 106) towards 100% strain in 7200 working stretch-release cycles. A low detection limit of 0.5% strain is also achieved. Besides, the fibers can be heated to 40 °C in 18 s at a small voltage of 2 V as an electrical heater. The assembled thermal sensors can monitor the temperature from 30 to 90 °C in real time, and the fiber-based capacitive type pressure sensor exhibits good sensing performance under force from 1 to 25 N. The hollow-porous fiber based all-in-one integrated wearable systems illustrate promising prospects for next generation electronic skins to detect human motions and body temperature with thermal therapy and inherent self-warming ability.
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