센서학회지 (Journal of Sensor Science and Technology)

  • 제31권5호
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  • Pages.312-317
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  • 2022
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  • 1225-5475(pISSN)
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  • 2093-7563(eISSN)
한국센서학회 (The Korean Sensors Society)
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BaTiO3 압전나노입자와 폴리머로 제작된 비납계 압전복합체의 스트레쳐블 압전 센서 어레이로의 적용 연구

Stretchable Sensor Array Based on Lead-Free Piezoelectric Composites Made of BaTiO3 Nanoparticles and Polymeric Matrix

  • 배준호 (경북대학교 신소재공학부) ;
  • 함성수 (경북대학교 신소재공학부) ;
  • 박성철 (경북대학교 신소재공학부) ;
  • 박귀일 (경북대학교 신소재공학부)
  • Bae, Jun Ho (School of Materials Science and Engineering, Kyungpook National University) ;
  • Ham, Seong Su (School of Materials Science and Engineering, Kyungpook National University) ;
  • Park, Sung Cheol (School of Materials Science and Engineering, Kyungpook National University) ;
  • Park, and Kwi-Il (School of Materials Science and Engineering, Kyungpook National University)
  • 투고 : 2022.07.01
  • 심사 : 2022.09.27
  • 발행 : 2022.09.30
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초록

Piezoelectric energy harvesting has attracted increasing attention over the last decade as a means for generating sustainable and long-lasting energy from wasted mechanical energy. To develop self-powered wearable devices, piezoelectric materials should be flexible, stretchable, and bio-eco-friendly. This study proposed the fabrication of stretchable piezoelectric composites via dispersing perovskite-structured BaTiO3 nanoparticles inside an Ecoflex polymeric matrix. In particular, the stretchable piezoelectric sensor array was fabricated via a simple and cost-effective spin-coating process by exploiting the piezoelectric composite comprising of BaTiO3 nanoparticles, Ecoflex matrix, and stretchable Ag coated textile electrodes. The fabricated sensor generated an output voltage of ~4.3 V under repeated compressing deformations. Moreover, the piezoelectric sensor array exhibited robust mechanical stability during mechanical pushing of ~5,000 cycles. Finite element method with multiphysics COMSOL simulation program was employed to support the experimental output performance of the fabricated device. Finally, the stretchable piezoelectric sensor array can be used as a self-powered touch sensor that can effectively detect and distinguish mechanical stimuli, such as pressing by a human finger. The fabricated sensor demonstrated potential to be used in a stretchable, lead-free, and scalable piezoelectric sensor array.

키워드

과제정보

본 연구는 2022년도 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원(No.2021R1A4A2001658, No.2022R1A2C1003853)을 받아 수행되었습니다.

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