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 °C 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 μA 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.

1. 서 론
2. 실험 방법
3. 결과 및 고찰
4. 결 론
Acknowledgement
References
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• 손하영(경북대학교 에너지신소재화학공학과) | Ha-Young Son (Department of Energy Materials & Chemical Engineering, Kyungpook National University, Sangju 37224, Republic of Korea)
• 박상식(경북대학교 에너지신소재화학공학과, 경북대학교 미래과학기술융합학과, 경북대학교 이차전지연구소) | Sang-Shik Park (Department of Energy Materials & Chemical Engineering, Kyungpook National University, Sangju 37224, Republic of Korea, Department of Advanced Science and Technology Convergence, Kyungpook National University, Sangju 37224, Republic of Korea, Advanced Battery Research Institute, Kyungpook National University, Sangju 37224, Republic of Korea) Corresponding author