A Multifunctional Radiated Patterned Surface for Fog Collection, Oil/Water Separation, and Interfacial Floatability
A Multifunctional Radiated Patterned Surface for Fog Collection, Oil/Water Separation, and Interfacial Floatability
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用于雾收集、油/水分离和界面漂浮性的多功能辐射图案表面
DOI：
10.1002/admi.202200861
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发表时间：
2022-07
影响因子：
5.4
通讯作者：
Jian‐Ning Ding
中科院分区：
文献类型：
--
作者：
Yunyun Song;Zhongqiang Zhang;Guang‐Gui Cheng;Yan Liu;Jian‐Ning Ding
具有特殊润湿性的多功能图案表面因其在雾收集、微流体和医疗设备方面的潜在应用而吸引了许多研究人员。为了实现这些功能并扩展相应的应用范围，本文报道了一种在不同润湿表面上的多功能超疏水辐射图案。有趣的是，具有辐射图案的亲水表面可以快速地将微小的水滴驱动到更湿润的区域，水滴从圆的中心移动到边缘，雾收集率约为3.075 g cm−2 h。然而，具有辐射图案的超疏水表面会触发水从边缘移动到圆的中心，实现反向传输。重要的是，超疏水表面可以吸收油并充当微反应器，实现油/水分离。通过氧等离子体蚀刻将表面转变为超亲水性，然后通过激光蚀刻恢复超疏水性，这证明了其优异的修复能力。此外，由超疏水上表面和疏水下表面组成的表面显示出改善的界面漂浮性。这些发现为多功能表面的设计提供了新颖的见解，该表面不仅可以增强雾气收集，还可以实现反向液体传输和油/水分离。
Multifunctional patterned surfaces with special wettability appeal to many researchers because of their potential applications in fog collection, microfluidics, and medical devices. To realize these functions and extend the corresponding application scopes, this article reports a multifunctional superhydrophobic radiated pattern on different wetting surfaces. Intriguingly, the hydrophilic surface with radiated pattern can quickly drive tiny water droplets toward more wetting regions, where water droplets move from center to the edge of a circle with a fog collection rate of about 3.075 g cm−2 h. However, the superhydrophobic surface with the radiated pattern triggers water to move from the edge to the center of a circle and achieves reverse transport. Importantly, the superhydrophobic surface can absorb oil and act as a micro-reactor to realize oil/water separation. The surface can be transformed to be superhydrophilic by oxygen plasma etching and then recovers the superhydrophobicity by laser etching, which convinces the excellent restoration capacity. Furthermore, the surface composed of a superhydrophobic upper surface and a hydrophobic lower surface shows improved interfacial floatability. The findings offer a novel insight into the design of a multifunctional surface that not only enhances the fog collection but also realizes reverse liquid transport, and oil/water separation.
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