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Bioinspired superwetting surfaces for fog harvesting fabricated by picosecond laser direct ablation

水雾收集仿生超润湿表面的皮秒激光加工研究

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Abstract

Fog harvesting has been considered as a promising method for solving water crisis in underdeveloped regions. To mimic and optimize the alleged natural fog harvesting ability of the stenocara beetle, hybrid superhydrophobic (hydrophobic, superhydrophilic)/hydrophilic patterns are processed on stainless steel via picosecond laser direct writing. Basically, after laser processing, the surfaces of stainless steel change from hydrophilic to superhydrophilic. Then, after chemical and heat treatment, the superhydrophilic surfaces become superhydrophobic with ultra-low adhesion, and superhydrophobic (hydrophobic) with ultra-high adhesion, respectively. This work systematically examines the fog harvesting ability of picosecond laser treated surfaces (LTS), pristine surfaces (PS), laser and chemical treated surfaces (LCTS), laser and heat-treated surfaces (LHTS). Compared with the PS, the as-prepared surfaces enhanced the fog harvesting efficiency by 50%. This work provides a fast and simple method to fog collectors, which offer a great opportunity to develop water harvesters for real world applications.

摘要

雾收集被认为是解决欠发达地区水资源危机的一种有前景的方法。为了模仿和优化stenocara 甲 虫的天然水雾收集能力，通过皮秒激光直写技术在不锈钢上加工超疏水(疏水，超亲水)/亲水混合的图 案。研究发现经过激光加工后，不锈钢的表面会从亲水变为超亲水。经过化学和热处理后，超亲水表 面分别变为具有超低黏附性的超疏水表面和具有超高黏附性的超疏水(疏水)表面。本文系统地研究了 原始表面(PS)、皮秒激光处理表面(LTS)、激光和化学处理表面(LCTS)、激光和热处理表面（LHTS） 的水雾收集能力。发现与PS相比，所制备的表面可将水雾收集效率提高50%。这项工作为雾收集提供 了一种快速而简单的方法，为开发用于现实世界的集水器提供了一个很好的选择。

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Funding

Project(52075302) supported by the National Natural Science Foundation of China; Project(ZR2021QE247) supported by the Shandong Provincial Natural Science Foundation, China; Projects(ZR2018ZB0521, ZR2018ZA0401) supported by the Major Basic Research of Shandong Provincial Natural Science Foundation, China; Project(Kfkt2020-09) supported by the Open Research Fund of State Key Laboratory of High Performance Complex Manufacturing, Central South University, China; Project(52075302) supported by the Key Laboratory of High-efficiency and Clean Mechanical Manufacture (Shandong University), Ministry of Education, China

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Authors and Affiliations

  1. Center for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan, 250061, China

    Wei-zhen Li  (李威振), Dong-kai Chu  (褚东凯), Shuo-shuo Qu  (屈硕硕) & Peng Yao  (姚鹏)

  2. Key Laboratory of High Efficiency and Clean Mechanical Manufacture (Shandong University), Ministry of Education, Jinan, 250061, China

    Wei-zhen Li  (李威振), Dong-kai Chu  (褚东凯), Shuo-shuo Qu  (屈硕硕) & Peng Yao  (姚鹏)

  3. Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha, 410083, China

    Kai Yin  (银恺)

  4. Department of Economics and Management, Technician College of Liaocheng City, Liaocheng, 252000, China

    Shuang-shuang Hu  (胡双双)

Authors
  1. Wei-zhen Li  (李威振)
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  2. Dong-kai Chu  (褚东凯)
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  3. Shuo-shuo Qu  (屈硕硕)
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  4. Kai Yin  (银恺)
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  6. Peng Yao  (姚鹏)
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Corresponding author

Correspondence to Dong-kai Chu  (褚东凯).

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Contributors

LI Wei-zheng validated the proposed method with practical experiments and wrote the first draft of manuscript. CHU Dong-kai conducted the literature review and wrote the manuscript. QU Shuo-shuo and YIN Kai edited the manuscript. HU Shuang-shuang reviewed and edited the manuscript. YAO Peng reviewed the manuscript.

Conflict of interest

LI Wei-zheng, CHU Dong-kai, QU Shuo-shuo, YIN Kai, HU Shuang-shuang and YAO Peng declare that they have no conflict of interest.

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Li, Wz., Chu, Dk., Qu, Ss. et al. Bioinspired superwetting surfaces for fog harvesting fabricated by picosecond laser direct ablation. J. Cent. South Univ. 29, 3368–3375 (2022). https://doi.org/10.1007/s11771-022-5157-8

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  • DOI: https://doi.org/10.1007/s11771-022-5157-8

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