Self-Restoring Capacitive Pressure Sensor Based on Three-Dimensional Porous Structure and Shape Memory Polymer
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 thei...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-03-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/5/824 |
| _version_ | 1797412217786728448 |
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| author | Byunggeon Park Young Jung Jong Soo Ko Jinhyoung Park Hanchul Cho |
| author_facet | Byunggeon Park Young Jung Jong Soo Ko Jinhyoung Park Hanchul Cho |
| author_sort | Byunggeon Park |
| collection | DOAJ |
| description | 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 °C. The pressure sensor based on the SMP exhibited a higher sensitivity of 0.0223 kPa<sup>−1</sup> 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. |
| first_indexed | 2024-03-09T04:59:13Z |
| format | Article |
| id | doaj.art-8ce72988bb8c47c4a9bb82c06f11a0bf |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T04:59:13Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-8ce72988bb8c47c4a9bb82c06f11a0bf2023-12-03T13:02:10ZengMDPI AGPolymers2073-43602021-03-0113582410.3390/polym13050824Self-Restoring Capacitive Pressure Sensor Based on Three-Dimensional Porous Structure and Shape Memory PolymerByunggeon Park0Young Jung1Jong Soo Ko2Jinhyoung Park3Hanchul Cho4Precision Mechanical Process and Control R&D Group, Korea Institute of Industrial Technology, 42-7, Baegyang-daero 804beon-gil, Sasang-gu, Busan 46938, KoreaPrecision Mechanical Process and Control R&D Group, Korea Institute of Industrial Technology, 42-7, Baegyang-daero 804beon-gil, Sasang-gu, Busan 46938, KoreaGraduate School of Mechanical Engineering, Pusan National University, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, KoreaSchool of Mechatronics Engineering, Korea University of Technology & Education, 600, Chungjeol-ro, Byeongcheon-myeon, Dongnam-gu, Chungcheongnam-do, Cheonan-si 31253, KoreaPrecision Mechanical Process and Control R&D Group, Korea Institute of Industrial Technology, 42-7, Baegyang-daero 804beon-gil, Sasang-gu, Busan 46938, KoreaHighly 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 °C. The pressure sensor based on the SMP exhibited a higher sensitivity of 0.0223 kPa<sup>−1</sup> 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.https://www.mdpi.com/2073-4360/13/5/824pressure sensorscapacitive pressure sensorshape memory polymerwide pressure rangeporous structureself-restoring |
| spellingShingle | Byunggeon Park Young Jung Jong Soo Ko Jinhyoung Park Hanchul Cho Self-Restoring Capacitive Pressure Sensor Based on Three-Dimensional Porous Structure and Shape Memory Polymer Polymers pressure sensors capacitive pressure sensor shape memory polymer wide pressure range porous structure self-restoring |
| title | Self-Restoring Capacitive Pressure Sensor Based on Three-Dimensional Porous Structure and Shape Memory Polymer |
| title_full | Self-Restoring Capacitive Pressure Sensor Based on Three-Dimensional Porous Structure and Shape Memory Polymer |
| title_fullStr | Self-Restoring Capacitive Pressure Sensor Based on Three-Dimensional Porous Structure and Shape Memory Polymer |
| title_full_unstemmed | Self-Restoring Capacitive Pressure Sensor Based on Three-Dimensional Porous Structure and Shape Memory Polymer |
| title_short | Self-Restoring Capacitive Pressure Sensor Based on Three-Dimensional Porous Structure and Shape Memory Polymer |
| title_sort | self restoring capacitive pressure sensor based on three dimensional porous structure and shape memory polymer |
| topic | pressure sensors capacitive pressure sensor shape memory polymer wide pressure range porous structure self-restoring |
| url | https://www.mdpi.com/2073-4360/13/5/824 |
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