An Qier, Wang Jinshu, Zhao Feng, Wang Lei
Key Laboratory of Advanced Functional Materials of Education Ministry of China, School of Materials Science and Engineering, Beijing University of Technology 100 Pingleyuan, Chaoyang District Beijing 100124 P. R. China
Department of Solar Energy Engineering, Hainan Vocational University of Science and Technology Haikou 571126 China.
RSC Adv. 2020 Mar 4;10(16):9318-9323. doi: 10.1039/d0ra00239a. eCollection 2020 Mar 2.
Inspired by numerous plants and animals living in arid conditions, a composite surface with the fog collection capacity has been fabricated in this study. The surface is composed of polydimethylsiloxane-based spine-arrays and a ZnO micron structure. Two wetting properties are integrated on the surface of the spine structure; the tip of spine is processed as hydrophilic and other parts such as the root region of spine and the base are processed as superhydrophobic. When the surface is in the saturated fog flow with a specific tilt angle, the fog deposits on spines and forms condensed droplets; then, the droplets fall off the surface due to gravity. Further, a new cycle of fog collection begins. In this study, we find that the percentage of the hydrophilic tip in the overall spine structure length, the distance between two spines and the tilt angle of surface are the key factors for improving the efficiency of fog collection. Such a composite surface might be an ideal platform for fog collection from air.
受众多生活在干旱条件下的动植物启发，本研究制备了一种具有集雾能力的复合表面。该表面由聚二甲基硅氧烷基脊柱阵列和氧化锌微米结构组成。脊柱结构表面集成了两种润湿性；脊柱尖端加工成亲水性，而脊柱根部区域和基部等其他部分加工成超疏水性。当表面以特定倾斜角度处于饱和雾流中时，雾沉积在脊柱上并形成凝结水滴；然后，水滴由于重力从表面掉落。此外，一个新的集雾循环开始。在本研究中，我们发现亲水性尖端在整个脊柱结构长度中所占的百分比、两个脊柱之间的距离以及表面的倾斜角度是提高集雾效率的关键因素。这样的复合表面可能是从空气中收集雾气的理想平台。
