Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Development of Multi-layer Pressure Sensor using PEDOT Vapor Phase Polymerization

PEDOT 기상중합 원단을 이용한 멀티 레이어 압력 센서 개발

  • Lim, Seung Ju (Smart Textile R&D Group, Korea Institute of Industrial Technology) ;
  • Bae, Jong Hyuk (Smart Textile R&D Group, Korea Institute of Industrial Technology) ;
  • Jang, Seong Jin (Smart Textile R&D Group, Korea Institute of Industrial Technology) ;
  • Lim, Jee Young (Smart Textile R&D Group, Korea Institute of Industrial Technology) ;
  • Park, Keun Hae (Smart Textile R&D Group, Korea Institute of Industrial Technology) ;
  • Ko, Jae Hoon (Smart Textile R&D Group, Korea Institute of Industrial Technology)
  • 임승주 (한국생산기술연구원 스마트섬유그룹) ;
  • 배종혁 (한국생산기술연구원 스마트섬유그룹) ;
  • 장성진 (한국생산기술연구원 스마트섬유그룹) ;
  • 임지영 (한국생산기술연구원 스마트섬유그룹) ;
  • 박근혜 (한국생산기술연구원 스마트섬유그룹) ;
  • 고재훈 (한국생산기술연구원 스마트섬유그룹)
  • Received : 2018.05.08
  • Accepted : 2018.05.25
  • Published : 2018.05.31
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Abstract

Smart textile industries have been precipitously developed and extended to electronic textiles and wearable devices in recent years. In particular, owing to an increasingly aging society, the elderly healthcare field has been highlighted in the smart device industries, and pressure sensors can be utilized in various elderly healthcare products such as flooring, mattress, and vital-sign measuring devices. Furthermore, elderly healthcare products need to be more lightweight and flexible. To fulfill those needs, textile-based pressure sensors is considered to be an attractive solution. In this research, to apply a textile to the second layer using a pressure sensing device, a novel type of conductive textile was fabricated using vapor phase polymerization of poly(3,4-ethylenedioxythiophene) (PEDOT). Vapor phase polymerization is suitable for preparing the conductive textile because the reaction can be controlled simply under various conditions and does not need high-temperature processing. The morphology of the obtained PEDOT-conductive textile was observed through the Field Emission Scanning Electron Microscope (FESEM). Moreover, the resistance was measured using an ohmmeter and was confirmed to be adjustable to various resistance ranges depending on the concentration of the oxidant solution and polymerization conditions. A 3-layer 81-point multi-pressure sensor was fabricated using the PEDOT-conductive textile prepared herein. A 3D-viewer program was developed to evaluate the sensitivity and multi-pressure recognition of the textile-based multi-pressure sensor. Finally, we confirmed the possibility that PEDOT-conductive textiles could be utilized by pressure sensors.

Keywords

References

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