Self-Restoring Capacitive Pressure Sensor Based on Three-Dimensional Porous Structure and Shape Memory Polymer

被引：22

作者：

Park, Byunggeon ^{[1
,2
]}

Jung, Young ^{[1
,2
]}

Ko, Jong Soo ^{[2
]}

Park, Jinhyoung ^{[3
]}

Cho, Hanchul ^{[1
]}

机构：

[1] Korea Inst Ind Technol, Precis Mech Proc & Control R&D Grp, 42-7,Baegyang Daero 804Beon Gil, Busan 46938, South Korea

[2] Pusan Natl Univ, Grad Sch Mech Engn, Busandaehak Ro 63Beon Gil, Busan 46241, South Korea

[3] Korea Univ Technol & Educ, Sch Mechatron Engn, 600 Chungjeol Ro, Cheonan Si 31253, Chungcheongnam, South Korea

来源：

POLYMERS | 2021年 / 13卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

pressure sensors; capacitive pressure sensor; shape memory polymer; wide pressure range; porous structure; self-restoring; durability; 25TH ANNIVERSARY ARTICLE; SKIN; MATRIX;

D O I：

10.3390/polym13050824

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Highly flexible and compressible porous polyurethane (PU) structures have effectively been applied in capacitive pressure sensors because of the good elastic properties of the PU structures. However, PU porous structure-based pressure sensors have been limited in practical applications owing to their low durability during pressure cycling. Herein, we report a flexible pressure sensor based on a three-dimensional porous structure with notable durability at a compressive pressure of 500 kPa facilitated by the use of a shape memory polymer (SMP). The SMP porous structure was fabricated using a sugar templating process and capillary effect. The use of the SMP resulted in the maintenance of the sensing performance for 100 cycles at 500 kPa; the SMP can restore its original shape within 30 s of heating at 80 degrees C. The pressure sensor based on the SMP exhibited a higher sensitivity of 0.0223 kPa(-1) than a typical PU-based sensor and displayed excellent sensing performance in terms of stability, response time, and hysteresis. Additionally, the proposed sensor was used to detect shoe insole pressures in real time and exhibited remarkable durability and motion differentiation.

引用

页码：1 / 9

页数：9

共 30 条

[11] A Highly Sensitive and Flexible Capacitive Pressure Sensor Based on a Porous Three-Dimensional PDMS/Microsphere Composite [J].