Highly Sensitive Textile-Based Capacitive Pressure Sensors Using PVDF-HFP/Ionic Liquid Composite Films
Textile-based pressure sensors have garnered considerable interest in electronic textiles due to their diverse applications, including human–machine interface and healthcare monitoring systems. We studied a textile-based capacitive pressure sensor array using a poly(vinylidene fluoride)-co-hexafluor...
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| Format: | Article |
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MDPI AG
2021-01-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/2/442 |
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| author | Kyobin Keum Jae Sang Heo Jimi Eom Keon Woo Lee Sung Kyu Park Yong-Hoon Kim |
| author_facet | Kyobin Keum Jae Sang Heo Jimi Eom Keon Woo Lee Sung Kyu Park Yong-Hoon Kim |
| author_sort | Kyobin Keum |
| collection | DOAJ |
| description | Textile-based pressure sensors have garnered considerable interest in electronic textiles due to their diverse applications, including human–machine interface and healthcare monitoring systems. We studied a textile-based capacitive pressure sensor array using a poly(vinylidene fluoride)-co-hexafluoropropylene (PVDF-HFP)/ionic liquid (IL) composite film. By constructing a capacitor structure with Ag-plated conductive fiber electrodes that are embedded in fabrics, a capacitive pressure sensor showing high sensitivity, good operation stability, and a wide sensing range could be created. By optimizing the PVDF-HFP:IL ratio (6.5:3.5), the fabricated textile pressure sensors showed sensitivity of 9.51 kPa<sup>−1</sup> and 0.69 kPa<sup>−1</sup> in the pressure ranges of 0–20 kPa and 20–100 kPa, respectively. The pressure-dependent capacitance variation in our device was explained based on the change in the contact-area formed between the multi-filament fiber electrodes and the PVDF-HFP/IL film. To demonstrate the applicability and scalability of the sensor device, a 3 × 3 pressure sensor array was fabricated. Due to its matrix-type array structure and capacitive sensing mechanism, multi-point detection was possible, and the different positions and the weights of the objects could be identified. |
| first_indexed | 2024-03-09T05:21:45Z |
| format | Article |
| id | doaj.art-f07d63f4feba4ed9a17d1144786e0184 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T05:21:45Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-f07d63f4feba4ed9a17d1144786e01842023-12-03T12:40:29ZengMDPI AGSensors1424-82202021-01-0121244210.3390/s21020442Highly Sensitive Textile-Based Capacitive Pressure Sensors Using PVDF-HFP/Ionic Liquid Composite FilmsKyobin Keum0Jae Sang Heo1Jimi Eom2Keon Woo Lee3Sung Kyu Park4Yong-Hoon Kim5School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, KoreaSchool of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, KoreaAdvanced Textile R&D Department, Research Institute of Convergence Technology, Korea Institute of Industrial Technology (KITECH), Ansan 15588, KoreaSchool of Electrical and Electronic Engineering, Chung-Ang University, Seoul 06974, KoreaSchool of Electrical and Electronic Engineering, Chung-Ang University, Seoul 06974, KoreaSchool of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, KoreaTextile-based pressure sensors have garnered considerable interest in electronic textiles due to their diverse applications, including human–machine interface and healthcare monitoring systems. We studied a textile-based capacitive pressure sensor array using a poly(vinylidene fluoride)-co-hexafluoropropylene (PVDF-HFP)/ionic liquid (IL) composite film. By constructing a capacitor structure with Ag-plated conductive fiber electrodes that are embedded in fabrics, a capacitive pressure sensor showing high sensitivity, good operation stability, and a wide sensing range could be created. By optimizing the PVDF-HFP:IL ratio (6.5:3.5), the fabricated textile pressure sensors showed sensitivity of 9.51 kPa<sup>−1</sup> and 0.69 kPa<sup>−1</sup> in the pressure ranges of 0–20 kPa and 20–100 kPa, respectively. The pressure-dependent capacitance variation in our device was explained based on the change in the contact-area formed between the multi-filament fiber electrodes and the PVDF-HFP/IL film. To demonstrate the applicability and scalability of the sensor device, a 3 × 3 pressure sensor array was fabricated. Due to its matrix-type array structure and capacitive sensing mechanism, multi-point detection was possible, and the different positions and the weights of the objects could be identified.https://www.mdpi.com/1424-8220/21/2/442electronic textilescapacitive pressure sensorsPVDF-HFPionic liquidcontact area |
| spellingShingle | Kyobin Keum Jae Sang Heo Jimi Eom Keon Woo Lee Sung Kyu Park Yong-Hoon Kim Highly Sensitive Textile-Based Capacitive Pressure Sensors Using PVDF-HFP/Ionic Liquid Composite Films Sensors electronic textiles capacitive pressure sensors PVDF-HFP ionic liquid contact area |
| title | Highly Sensitive Textile-Based Capacitive Pressure Sensors Using PVDF-HFP/Ionic Liquid Composite Films |
| title_full | Highly Sensitive Textile-Based Capacitive Pressure Sensors Using PVDF-HFP/Ionic Liquid Composite Films |
| title_fullStr | Highly Sensitive Textile-Based Capacitive Pressure Sensors Using PVDF-HFP/Ionic Liquid Composite Films |
| title_full_unstemmed | Highly Sensitive Textile-Based Capacitive Pressure Sensors Using PVDF-HFP/Ionic Liquid Composite Films |
| title_short | Highly Sensitive Textile-Based Capacitive Pressure Sensors Using PVDF-HFP/Ionic Liquid Composite Films |
| title_sort | highly sensitive textile based capacitive pressure sensors using pvdf hfp ionic liquid composite films |
| topic | electronic textiles capacitive pressure sensors PVDF-HFP ionic liquid contact area |
| url | https://www.mdpi.com/1424-8220/21/2/442 |
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