A Highly Sensitive and Flexible Capacitive Pressure Sensor Based on a Porous Three-Dimensional PDMS/Microsphere Composite
In recent times, polymer-based flexible pressure sensors have been attracting a lot of attention because of their various applications. A highly sensitive and flexible sensor is suggested, capable of being attached to the human body, based on a three-dimensional dielectric elastomeric structure of p...
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doaj-61de3b9860c5481c93d4e744b0db6b642020-11-25T03:45:57ZengMDPI AGPolymers2073-43602020-06-01121412141210.3390/polym12061412A Highly Sensitive and Flexible Capacitive Pressure Sensor Based on a Porous Three-Dimensional PDMS/Microsphere CompositeYoung Jung0Wookjin Lee1Kyungkuk Jung2Byunggeon Park3Jinhyoung Park4Jongsoo Ko5Hanchul Cho6Precision Mechanical Process and Control R&D Group, Korea Institute of Industrial Technology, 42-7, Baegyang-daero 804beon-gil, Sasang-gu, Busan 46938, KoreaAdvanced Surface Coating & Processing R&D Group, Korea Institute of Industrial Technology, 14, Namyangsan 1-gil, Doing-myeon, Gyeongsangnam-do, Yangsan 50635, KoreaQuality&Standards Department, Korea Marine Equipment Research Institute, 435, Haeyang-ro, Yeongdo-gu, Busan 49111, KoreaPrecision Mechanical Process and Control R&D Group, Korea Institute of Industrial Technology, 42-7, Baegyang-daero 804beon-gil, Sasang-gu, Busan 46938, KoreaSchool of Mechatronics Engineering, Korea University of Technology & Education, 600, Chungjeol-ro, Byeongcheon-myeon, Dongnam-gu, Cheonan-si, Chungcheongnam-do 31253, KoreaGraduate School of Mechanical Engineering, Pusan National University, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, KoreaPrecision Mechanical Process and Control R&D Group, Korea Institute of Industrial Technology, 42-7, Baegyang-daero 804beon-gil, Sasang-gu, Busan 46938, KoreaIn recent times, polymer-based flexible pressure sensors have been attracting a lot of attention because of their various applications. A highly sensitive and flexible sensor is suggested, capable of being attached to the human body, based on a three-dimensional dielectric elastomeric structure of polydimethylsiloxane (PDMS) and microsphere composite. This sensor has maximal porosity due to macropores created by sacrificial layer grains and micropores generated by microspheres pre-mixed with PDMS, allowing it to operate at a wider pressure range (~150 kPa) while maintaining a sensitivity (of 0.124 kPa<sup>−1</sup> in a range of 0~ 15 kPa) better than in previous studies. The maximized pores can cause deformation in the structure, allowing for the detection of small changes in pressure. In addition to exhibiting a fast rise time (~167 ms) and fall time (~117 ms), as well as excellent reproducibility, the fabricated pressure sensor exhibits reliability in its response to repeated mechanical stimuli (2.5 kPa, 1,000 cycles). As an application, we develop a wearable device for monitoring repeated tiny motions, such as the pulse on the human neck and swallowing at the Adam’s apple. This sensory device is also used to detect movements in the index finger and to monitor an insole system in real-time.https://www.mdpi.com/2073-4360/12/6/1412pressure sensorspolymeric compositemicroporousporous structuremicrospheres |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Young Jung Wookjin Lee Kyungkuk Jung Byunggeon Park Jinhyoung Park Jongsoo Ko Hanchul Cho |
spellingShingle |
Young Jung Wookjin Lee Kyungkuk Jung Byunggeon Park Jinhyoung Park Jongsoo Ko Hanchul Cho A Highly Sensitive and Flexible Capacitive Pressure Sensor Based on a Porous Three-Dimensional PDMS/Microsphere Composite Polymers pressure sensors polymeric composite microporous porous structure microspheres |
author_facet |
Young Jung Wookjin Lee Kyungkuk Jung Byunggeon Park Jinhyoung Park Jongsoo Ko Hanchul Cho |
author_sort |
Young Jung |
title |
A Highly Sensitive and Flexible Capacitive Pressure Sensor Based on a Porous Three-Dimensional PDMS/Microsphere Composite |
title_short |
A Highly Sensitive and Flexible Capacitive Pressure Sensor Based on a Porous Three-Dimensional PDMS/Microsphere Composite |
title_full |
A Highly Sensitive and Flexible Capacitive Pressure Sensor Based on a Porous Three-Dimensional PDMS/Microsphere Composite |
title_fullStr |
A Highly Sensitive and Flexible Capacitive Pressure Sensor Based on a Porous Three-Dimensional PDMS/Microsphere Composite |
title_full_unstemmed |
A Highly Sensitive and Flexible Capacitive Pressure Sensor Based on a Porous Three-Dimensional PDMS/Microsphere Composite |
title_sort |
highly sensitive and flexible capacitive pressure sensor based on a porous three-dimensional pdms/microsphere composite |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2020-06-01 |
description |
In recent times, polymer-based flexible pressure sensors have been attracting a lot of attention because of their various applications. A highly sensitive and flexible sensor is suggested, capable of being attached to the human body, based on a three-dimensional dielectric elastomeric structure of polydimethylsiloxane (PDMS) and microsphere composite. This sensor has maximal porosity due to macropores created by sacrificial layer grains and micropores generated by microspheres pre-mixed with PDMS, allowing it to operate at a wider pressure range (~150 kPa) while maintaining a sensitivity (of 0.124 kPa<sup>−1</sup> in a range of 0~ 15 kPa) better than in previous studies. The maximized pores can cause deformation in the structure, allowing for the detection of small changes in pressure. In addition to exhibiting a fast rise time (~167 ms) and fall time (~117 ms), as well as excellent reproducibility, the fabricated pressure sensor exhibits reliability in its response to repeated mechanical stimuli (2.5 kPa, 1,000 cycles). As an application, we develop a wearable device for monitoring repeated tiny motions, such as the pulse on the human neck and swallowing at the Adam’s apple. This sensory device is also used to detect movements in the index finger and to monitor an insole system in real-time. |
topic |
pressure sensors polymeric composite microporous porous structure microspheres |
url |
https://www.mdpi.com/2073-4360/12/6/1412 |
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