Hwang Hee Jae, Lee Younghoon, Lee Choongyeop, Nam Youngsuk, Park Jinhyoung, Choi Dukhyun, Kim Dongseob
Department of Mechanical Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-Si, Gyeonggi-do 446701, Korea.
Construction Equipment R&D Group, Korea Institute of Industrial Technology (KITECH), 288-1, Daehak-ri, Hayang-eup, Gyeongsan-si, Gyeongsangbuk-do 712091, Korea.
Micromachines (Basel). 2018 Dec 11;9(12):656. doi: 10.3390/mi9120656.
The oxidation of metal microparticles (MPs) in a polymer film yields a mesoporous highly-deformable composite polymer for enhancing performance and creating a gapless structure of triboelectric nanogenerators (TENGs). This is a one-step scalable synthesis for developing large-scale, cost-effective, and light-weight mesoporous polymer composites. We demonstrate mesoporous aluminum oxide (Al₂O₃) polydimethylsiloxane (PDMS) composites with a nano-flake structure on the surface of Al₂O₃ MPs in pores. The porosity of mesoporous Al₂O₃-PDMS films reaches 71.35% as the concentration of Al MPs increases to 15%. As a result, the film capacitance is enhanced 1.8 times, and TENG output performance is 6.67-times greater at 33.3 kPa and 4 Hz. The pressure sensitivity of 6.71 V/kPa and 0.18 μA/kPa is determined under the pressure range of 5.5⁻33.3 kPa. Based on these structures, we apply mesoporous Al₂O₃-PDMS film to a gapless TENG structure and obtain a linear pressure sensitivity of 1.00 V/kPa and 0.02 μA/kPa, respectively. Finally, we demonstrate self-powered safety cushion sensors for monitoring human sitting position by using gapless TENGs, which are developed with a large-scale and highly-deformable mesoporous Al₂O₃-PDMS film with dimensions of 6 × 5 pixels (33 × 27 cm²).
聚合物薄膜中金属微粒（MPs）的氧化产生了一种介孔高可变形复合聚合物，用于提高摩擦电纳米发电机（TENGs）的性能并创建无间隙结构。这是一种用于开发大规模、经济高效且轻质介孔聚合物复合材料的一步可扩展合成方法。我们展示了在孔内Al₂O₃ MPs表面具有纳米片状结构的介孔氧化铝（Al₂O₃）聚二甲基硅氧烷（PDMS）复合材料。随着Al MPs浓度增加到15%，介孔Al₂O₃-PDMS薄膜的孔隙率达到71.35%。结果，薄膜电容提高了1.8倍，并且在33.3 kPa和4 Hz时TENG输出性能提高了6.67倍。在5.5⁻33.3 kPa的压力范围内测定的压力灵敏度为6.71 V/kPa和0.18 μA/kPa。基于这些结构，我们将介孔Al₂O₃-PDMS薄膜应用于无间隙TENG结构，分别获得了1.00 V/kPa和0.02 μA/kPa的线性压力灵敏度。最后，我们展示了通过使用无间隙TENG开发的用于监测人体坐姿的自供电安全垫传感器，该传感器是用尺寸为6×5像素（33×27 cm²）的大规模且高可变形介孔Al₂O₃-PDMS薄膜制成的。
