A Highly Sensitive and Stretchable Yarn Strain Sensor for Human Motion Tracking Utilizing a Wrinkle-Assisted Crack Structure
A Highly Sensitive and Stretchable Yarn Strain Sensor for Human Motion Tracking Utilizing a Wrinkle-Assisted Crack Structure
复制标题
一种高灵敏度、可拉伸的纱线应变传感器，利用皱纹辅助裂纹结构进行人体运动跟踪
DOI：
10.1021/acsami.9b09229
复制
发表时间：
2019-10-02
影响因子：
9.5
通讯作者：
Shen, Changyu
中科院分区：
文献类型：
--
作者：
Sun, Hongling;Dai, Kun;Shen, Changyu
随着柔性电子的蓬勃发展，对多功能、高性能的应变传感器的需求越来越大。虽然在设计具有感测能力的新微结构方面已经取得了重大进展，但是灵敏度和可工作的应变范围之间的折衷已经阻止了既高度灵敏又可拉伸的应变传感器的开发。在这里，通过预拉伸多壁碳纳米管墨水（CNTs墨水）/聚氨酯纱线（PU纱线），设计并制造了一种摩擦辅助裂纹微结构。这种设计的结构源于拉伸过程中CNT墨水和PU纱线之间的杨氏模量和弹性的不匹配。该结构赋予传感器对拉伸应变的高灵敏度（应变200%时的应变计系数为1344.1）、超低检测限（10000次循环）、宽应变范围（0-200%）以及对弯曲变形的出色响应和稳定性的综合特性。这种高性能应变传感器将在智能织物、电气皮肤和疲劳检测等应用中广泛提高性能，以实现全方位人体运动监测。
With the booming development of flexible electronics, the need for a multifunctional and high-performance strain sensor has become increasingly important. Although significant progress has been made in designing new microstructures with sensing capabilities, the tradeoff between sensitivity and workable strain range has prevented the development of a strain sensor that is both highly sensitive and also stretchable. Here, a wrinkle-assisted crack microstructure is designed and fabricated via prestretching the multiwalled carbon nanotubes ink (CNTs ink)/polyurethane yarn (PU yarn). This designed structure originates from the mismatch in Young's modulus and elasticity between the CNTs ink and PU yarn during the stretching process. The structure endows the sensor with combined characteristics of a high sensitivity toward stretching strain (gauge factor of 1344.1 at 200% strain), an ultralow limit of detection (10 000 cycles), a wide workable strain range (0-200%), and outstanding response and stability toward bending deformation. This high-performance strain sensor will see widespread improved performance across applications such as intelligent fabrics, electrical skins, and fatigue detection for full-range human motion monitoring.