College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China; Hubei Engineering Center of Natural Polymer-based Medical Materials, Wuhan University, Wuhan 430072, China.
College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China; Hubei Engineering Center of Natural Polymer-based Medical Materials, Wuhan University, Wuhan 430072, China.
Carbohydr Polym. 2022 Sep 1;291:119586. doi: 10.1016/j.carbpol.2022.119586. Epub 2022 May 7.
Environment issues and energy crisis call for eco-friendly, biodegradable and low-cost natural materials for the extensive application of distributed energy harvesting triboelectric nanogenerators (TENGs) and multi-functional self-powered sensors. Here, flexible, robust and transparent chitin films fabricated via non-freezing dissolution approach in KOH/urea were used as tribopositive material to assemble TENGs, which served as outstanding mechanical energy harvesters and multi-functional self-powered sensors. The tensile strength and elongation at break of the chitin film reached 84.7 MPa and 14.5%, better than most existing biodegradable-based films. The chitin-based TENG (CF-TENG) achieved open-circuit voltage up to 182.4 V, short-circuit current of 4.8 μA and maximum power density over 1.25 W m. Furthermore, the CF-TENG can be utilized as tactile sensors for handwriting recognition and health monitoring of subtle pressures, as well as non-contact sensation, exhibiting great potential as self-powered sensors and human-machine interfaces.
环境问题和能源危机呼吁使用环保、可生物降解且低成本的天然材料，以广泛应用分布式能量收集的摩擦电纳米发电机（TENG）和多功能自供电传感器。在这里，通过在 KOH/尿素中进行非冻结溶解方法制备的柔性、坚固且透明的甲壳素薄膜被用作摩擦正性材料来组装 TENG，其可用作出色的机械能收集器和多功能自供电传感器。甲壳素薄膜的拉伸强度和断裂伸长率分别达到 84.7 MPa 和 14.5%，优于大多数现有的基于可生物降解的薄膜。基于甲壳素的 TENG（CF-TENG）实现了高达 182.4 V 的开路电压、4.8 μA 的短路电流和超过 1.25 W/m 的最大功率密度。此外，CF-TENG 可用作触觉传感器，用于手写识别和对细微压力的健康监测，以及非接触式感觉，在作为自供电传感器和人机界面方面具有巨大潜力。
