Yu Zhenwei, Yun Frank F, Wang Yanqin, Yao Li, Dou Shixue, Liu Kesong, Jiang Lei, Wang Xiaolin
Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, Wollongong, NSW, 2500, Australia.
Institute of Agricultural Resources and Environment, Shandong Academy of Agricultural Science, Jinan, 250100, P. R. China.
Small. 2017 Sep;13(36). doi: 10.1002/smll.201701403. Epub 2017 Jul 18.
With the impacts of climate change and impending crisis of clean drinking water, designing functional materials for water harvesting from fog with large water capacity has received much attention in recent years. Nature has evolved different strategies for surviving dry, arid, and xeric conditions. Nature is a school for human beings. In this contribution, inspired by the Stenocara beetle, superhydrophilic/superhydrophobic patterned surfaces are fabricated on the silica poly(dimethylsiloxane) (PDMS)-coated superhydrophobic surfaces using a pulsed laser deposition approach with masks. The resultant samples with patterned wettability demonstrate water-harvesting efficiency in comparison with the silica PDMS-coated superhydrophobic surface and the Pt nanoparticles-coated superhydrophilic surface. The maximum water-harvesting efficiency can reach about 5.3 g cm h . Both the size and the percentage of the Pt-coated superhydrophilic square regions on the patterned surface affect the condensation and coalescence of the water droplet, as well as the final water-harvesting efficiency. The present water-harvesting strategy should provide an avenue to alleviate the water crisis facing mankind in certain arid regions of the world.
随着气候变化的影响以及清洁饮用水即将面临的危机，近年来设计具有大储水量的用于从雾气中收集水的功能材料受到了广泛关注。大自然已经进化出不同的策略来在干燥、干旱和旱生条件下生存。大自然是人类的一所学校。在本论文中，受 Stenocara 甲虫的启发，使用带掩膜的脉冲激光沉积方法在二氧化硅聚二甲基硅氧烷（PDMS）涂层的超疏水表面上制备了超亲水/超疏水图案化表面。与二氧化硅 PDMS 涂层的超疏水表面和铂纳米颗粒涂层的超亲水表面相比，所得具有图案化润湿性的样品展示出集水效率。最大集水效率可达约 5.3 g cm h 。图案化表面上铂涂层超亲水方形区域的尺寸和百分比都会影响水滴的凝结和聚结，以及最终的集水效率。目前的集水策略应为缓解世界某些干旱地区人类面临的水危机提供一条途径。
