School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, PR China.
Nat Commun. 2022 Jul 18;13(1):4168. doi: 10.1038/s41467-022-31987-w.
The effective acquisition of clean water from atmospheric water offers a potential sustainable solution for increasing global water and energy shortages. In this study, an asymmetric amphiphilic surface incorporating self-driven triboelectric adsorption was developed to obtain clean water from the atmosphere. Inspired by cactus spines and beetle elytra, the asymmetric amphiphilic surface was constructed by synthesizing amphiphilic cellulose ester coatings followed by coating on laser-engraved spines of fluorinated ethylene propylene. Notably, the spontaneous interfacial triboelectric charge between the droplet and the collector was exploited for electrostatic adsorption. Additionally, the droplet triboelectric nanogenerator converts the mechanical energy generated by droplets falling into electrical energy through the volume effect, achieving an excellent output performance, and further enhancing the electrostatic adsorption by means of external charges, which achieved a water harvesting efficiency of 93.18 kg/m h. This strategy provides insights for the design of water harvesting system.
从大气中获取清洁水为解决全球水资源和能源短缺问题提供了一种潜在的可持续解决方案。本研究开发了一种具有自驱动摩擦电吸附功能的不对称两亲表面，用于从大气中获取清洁水。受仙人掌刺和甲虫鞘翅的启发，通过合成两亲性纤维素酯涂层，然后涂覆在氟化乙烯丙烯激光雕刻的刺上，构建了不对称两亲表面。值得注意的是，利用液滴和集电器之间的自发界面摩擦电荷实现了静电吸附。此外，液滴摩擦纳米发电机通过体积效应将液滴下落产生的机械能转化为电能，实现了优异的输出性能，并通过外部电荷进一步增强静电吸附，从而实现了 93.18 kg/m h 的水收集效率。该策略为水收集系统的设计提供了思路。
