Rajabi-Abhari Araz, Yoo Hyunjoon, Kim Ji-Seok, Yoon Hong Yeon, Park Jeong Young, Yan Ning, Tabassian Rassoul, Oh Il-Kwon
National Creative Research Initiative for Functionally Antagonistic Nano-Engineering, Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Daejeon, Yuseong-gu, 34141, Republic of Korea.
Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street Toronto, Toronto, Ontario, M5R 0A3, Canada.
Small. 2024 Dec;20(50):e2405664. doi: 10.1002/smll.202405664. Epub 2024 Oct 2.
The integration of bio-based materials into triboelectric nanogenerators (TENGs) for energy harvesting from human body motions has sparked considerable research attention. Here, a silanated cellulose nanofibril (SCNF) aerogel is reported for structurally reliable TENGs and reversely compressible Taekwondo scoring sensors under repeated impacts. The preparation of the aerogel involves silanizing cellulose nanofibers (CNFs) with vinyltrimethoxysilane (VTMS), following by freeze-drying and post-heating treatment. The SCNF aerogel with crosslinked physico-chemical bonding and highly porous network is found to exhibit superior mechanical strength and reversible compressibility as well as enhanced water repellency and electron-donating ability. The TENG having a tribo-positive SCNF layer exhibits exceptional triboelectric performances, generating a voltage of 270 V, current of 11 µA, and power density of 401.1 mW m under an applied force of 8 N at a frequency of 5 Hz. With its inherent merits in material composition, structural configuration, and device sensitivity, the SCNF TENG demonstrates the capability to seamlessly integrate into a Taekwondo protection gear, serving as an efficient self-powered sensor for monitoring hitting scores. This study highlights the significant potential of a facilely fabricated SCNF aerogel for the development of high-performance, bio-friendly, and cost-effective Bio-TENGs, enabling their application as self-powered wearable devices and sports engineering sensors.
将生物基材料集成到摩擦电纳米发电机（TENGs）中以从人体运动中收集能量已引发了大量的研究关注。在此，报道了一种硅烷化纤维素纳米原纤维（SCNF）气凝胶，用于在反复冲击下结构可靠的TENGs和可反向压缩的跆拳道计分传感器。气凝胶的制备包括用乙烯基三甲氧基硅烷（VTMS）对纤维素纳米纤维（CNFs）进行硅烷化，随后进行冷冻干燥和后热处理。发现具有交联物理化学键和高度多孔网络的SCNF气凝胶表现出优异的机械强度和可逆压缩性，以及增强的疏水性和供电子能力。具有摩擦正性SCNF层的TENG表现出卓越的摩擦电性能，在8 N的外力和5 Hz的频率下产生270 V的电压、11 µA的电流和401.1 mW m的功率密度。凭借其在材料组成、结构配置和器件灵敏度方面的固有优点，SCNF TENG展示了无缝集成到跆拳道防护装备中的能力，作为一种高效的自供电传感器用于监测击打得分。这项研究突出了一种简便制备的SCNF气凝胶在开发高性能、生物友好且经济高效的生物TENGs方面的巨大潜力，使其能够应用于自供电可穿戴设备和体育工程传感器。
