Pressure-conductive rubber sensor based on liquid-metal-PDMS composite

被引：43

作者：

Oh, Jun Ho ^{[1
]}

Woo, Ju Yeon ^{[2
]}

Jo, Sunghwan ^{[3
]}

Han, Chang-Soo ^{[1
,2
,3
]}

机构：

[1] Korea Univ, Sch Mech Engn, Seoul 02841, South Korea

[2] Korea Univ, Inst Adv Machinery Design Technol, Seoul 02841, South Korea

[3] Korea Univ, Dept Micro Nano Syst, Seoul 02841, South Korea

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2019年 / 299卷

基金：

新加坡国家研究基金会;

关键词：

Liquid metal; Pressure conductive rubber; Composite; Electrical conductivity; Sensor; STRAIN SENSORS; HYSTERESIS; MATRIX; ARRAYS;

D O I：

10.1016/j.sna.2019.111610

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We present a pressure-conductive rubber sensor using a liquid-metal-polydimethylsiloxane (PDMS) composite suitable for incorporation onto surfaces with a complex curvature such as the human body. The composite is synthesized by physical mixing of Galinstan and PDMS based on magnetic stirring. This composite is conductive only when a mechanical pressure exceeding the threshold value or strain is applied; the pristine state of the composite is not conductive. The threshold value can be controlled by adjusting the mixing ratio of liquid metal and PDMS. This material is mechanically robust, allowing it to operate reliably under various elastic deformations such as pressing, stretching, and bending without structural failure and performance degradation. Moreover, a fabricated sensor array can detect the distribution of the applied pressure in plane. As a feasibility study, we demonstrate a pressure-conductive rubber sensor for detecting finger movements and bio-signals such as blood pressure and respiration rate. Our results reveal that our rubber sensor is practical as a wearable sensor because of its mechanical robustness and electrical reliability. (C) 2019 Elsevier B.V. All rights reserved.

引用

页数：7

共 30 条

[21] Arrays of hollow out-of-plane microneedles for drug delivery [J].