Fabrication and application of flexible strain sensor based on auxetic structure

被引：0
|
作者：
Liu Z. [1 ]
Gan L. [1 ]
Liao G. [1 ]
Cheng R. [1 ]
机构：
[1] School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan
来源：
Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) | 2024年 / 52卷 / 06期
关键词：
auxetic structure; flexibility; human-machine interaction; layer by layer self-assembly technology; strain sensor;
D O I：
10.13245/j.hust.240615
中图分类号：
学科分类号：
摘要：
To enable flexible strain sensor to obtain both high sensitivity and excellent stability，the auxetic structure，possessing the negative Poisson’s ratio characteristics was used to introduce the back of the Polydimethylsiloxane (PDMS) substrate．Due to the excellent adhesion of polyethyleneimine (PEI) and the strain sensing characteristics of multiwalled carbon nanotube (MWCNTs)，the layer by layer self-assembly technology was used to deposit the PEI-MWCNTs sensitive layer． After preparing electrode and encapsulated by PDMS，the flexible strain sensor based on auxetic structure was fabricating． Gauge factor of the strain sensor reaches 499，which is 13 times than that of the bare strain sensor．Furthermore，the strain sensor has fast response speed (37 ms of response time，and 38 ms of relaxation time)，and excellent stability (>1.5×104 tensile cycles)．The flexible strain sensor can detect human body movements and tiny physiological signals such as wrist pulse，and has been successfully applied to the real-time control of palm and manipulator，adequately demonstrating its application value in the field of body movements detection and human-computer interaction. © 2024 Huazhong University of Science and Technology. All rights reserved.
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页码：110 / 116
页数：6
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