Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Characteristics of Bio-Piezoelectric Generator Using Edible Collagen Powder

식용 콜라겐 분말을 적용한 바이오 압전 발전기의 특성

  • Ha-Young Son (Department of Energy Materials & Chemical Engineering, Kyungpook National University) ;
  • Sang-Shik Park (Department of Energy Materials & Chemical Engineering, Kyungpook National University)
  • 손하영 (경북대학교 에너지신소재화학공학과) ;
  • 박상식 (경북대학교 에너지신소재화학공학과)
  • Received : 2024.03.28
  • Accepted : 2024.04.16
  • Published : 2024.04.27
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Abstract

Because collagen is inherently piezoelectric, research is being actively conducted to utilize it to harvest energy. In this study, a collagen solution was prepared using edible low-molecular-weight peptide collagen powder, and collagen films were fabricated using a dip coating method. The collagen films prepared by dip coating showed a smooth surface without defects such as pinholes or cracks. Dehydrothermal treatment of the collagen films was performed to induce a stable molecular structure through cross-linking. The collagen film subjected to dehydrothermal treatment at 110 ℃ for 24 h showed a thickness reduction rate of 19 %. Analysis of the collagen films showed that the crystallinity of the collagen film improved by about 7.9 % after dehydrothermal treatment. A collagen film-based piezoelectric nanogenerator showed output characteristics of approximately 13.7 V and 1.4 ㎂ in a pressure test of 120 N. The generator showed a maximum power density of about 2.91 mW/m2 and an output voltage of about 8~19 V during various human body movements such as finger tapping. The collagen film-based piezoelectric generator showed improved output performance with improved crystallinity and piezoelectricity after dehydrothermal treatment.

Keywords

Acknowledgement

This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (NRF-2021R1A5A8033165 and NRF-2020R1I1A3072902).

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