A simple way to achieve bioinspired hybrid wettability surface with micro/nanopatterns for efficient fog collection,Nanoscale

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A simple way to achieve bioinspired hybrid wettability surface with micro/nanopatterns for efficient fog collection
Nanoscale ( IF 5.8 ) Pub Date : 2017-09-14 00:00:00 , DOI: 10.1039/c7nr05683d
Kai Yin _{1,

2,

3,

4,

5} , Haifeng Du _{3,

5,

6,

7,

8} , Xinran Dong _{3,

5,

6,

7,

8} , Cong Wang _{3,

5,

6,

7,

8} , Ji-An Duan _{3,

5,

6,

7,

8} , Jun He _{1,

2,

3,

4,

5}

Affiliation

Fog collection is receiving increasing attention for providing water in semi-arid deserts and inland areas. Inspired by the fog harvesting ability of the hydrophobic–hydrophilic surface of Namib desert beetles, we present a simple, low-cost method to prepare a hybrid superhydrophobic–hydrophilic surface. The surface contains micro/nanopatterns, and is prepared by incorporating femtosecond-laser fabricated polytetrafluoroethylene nanoparticles deposited on superhydrophobic copper mesh with a pristine hydrophilic copper sheet. The as-prepared surface exhibits enhanced fog collection efficiency compared with uniform (super)hydrophobic or (super)hydrophilic surfaces. This enhancement can be tuned by controlling the mesh number, inclination angle, and fabrication structure. Moreover, the surface shows excellent anti-corrosion ability after immersing in 1 M HCl, 1 M NaOH, and 10 wt% NaCl solutions for 2 hours. This work may provide insight into fabricating hybrid superhydrophobic–hydrophilic surfaces for efficient atmospheric water collection.

中文翻译：

一种使用微米/纳米图案实现生物启发的混合可湿性表面的简单方法，可有效收集雾气

收集雾在半干旱沙漠和内陆地区供水方面正受到越来越多的关注。受纳米比亚沙漠甲虫疏水-亲水表面的雾气捕集能力的启发，我们提出了一种简单，低成本的方法来制备杂化的超疏水-亲水表面。该表面包含微/纳米图案，并且通过将飞秒激光制造的聚四氟乙烯纳米颗粒与原始亲水性铜片结合在一起而制备，该飞秒激光制造的聚四氟乙烯纳米颗粒沉积在超疏水性铜网上。与均匀的（超）疏水或（超）亲水表面相比，所制备的表面表现出增强的除雾效率。可以通过控制网格数，倾斜角度和制造结构来调整此增强功能。而且，将其浸入1 M HCl，1 M NaOH和10 wt％NaCl溶液中2小时后，表面显示出优异的抗腐蚀能力。这项工作可以为制造超疏水-亲水混合表面提供有效的见解，以有效地收集大气中的水。

更新日期：2017-09-22

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