Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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3D-Porous Structured Piezoelectric Strain Sensors Based on PVDF Nanocomposites

PVDF 나노 복합체 기반 3차원 다공성 압전 응력 센서

  • Kim, Jeong Hyeon (Division of Advanced Materials Engineering, Jeonbuk National University) ;
  • Kim, Hyunseung (Division of Advanced Materials Engineering, Jeonbuk National University) ;
  • Jeong, Chang Kyu (Division of Advanced Materials Engineering, Jeonbuk National University) ;
  • Lee, Han Eol (Division of Advanced Materials Engineering, Jeonbuk National University)
  • 김정현 (전북대학교 신소재공학부 전자재료공학전공) ;
  • 김현승 (전북대학교 신소재공학부 전자재료공학전공) ;
  • 정창규 (전북대학교 신소재공학부 전자재료공학전공) ;
  • 이한얼 (전북대학교 신소재공학부 전자재료공학전공)
  • Received : 2022.08.03
  • Accepted : 2022.09.19
  • Published : 2022.09.30
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Abstract

With the development of Internet of Things (IoT) technologies, numerous people worldwide connect with various electronic devices via Human-Machine Interfaces (HMIs). Considering that HMIs are a new concept of dynamic interactions, wearable electronics have been highlighted owing to their lightweight, flexibility, stretchability, and attachability. In particular, wearable strain sensors have been applied to a multitude of practical applications (e.g., fitness and healthcare) by conformally attaching such devices to the human skin. However, the stretchable elastomer in a wearable sensor has an intrinsic stretching limitation; therefore, structural advances of wearable sensors are required to develop practical applications of wearable sensors. In this study, we demonstrated a 3-dimensional (3D), porous, and piezoelectric strain sensor for sensing body movements. More specifically, the device was fabricated by mixing polydimethylsiloxane (PDMS) and polyvinylidene fluoride nanoparticles (PVDF NPs) as the matrix and piezoelectric materials of the strain sensor. The porous structure of the strain sensor was formed by a sugar cube-based 3D template. Additionally, mixing methods of PVDF piezoelectric NPs were optimized to enhance the device sensitivity. Finally, it is verified that the developed strain sensor could be directly attached onto the finger joint to sense its movements.

Keywords

Acknowledgement

본 연구는 2022년 과학기술정보통신부 재원으로 한국연구재단의 지원(중견연구자지원사업 2022R1A2C4002037, 기초연구실사업 2022R1A4A3032923 및 2022R1A4A3033320)을 받아 수행된 연구입니다.

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