Mechanisms and Applications of Superhydrophobic Surfaces

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Characterization, Deposition and Modification".

Deadline for manuscript submissions: closed (20 September 2024) | Viewed by 4755

Special Issue Editor


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Guest Editor
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
Interests: pulsed laser ablation; chemical coatings; 3D printings; superhydrophobic; superhydrophilic; superoleophobic; water harvesting; anti-corrosion; anti-icing; droplet manipulation; oil-water separation
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Special Issue Information

Dear Colleagues,

After being inspired by natural features such as lotus leaves, rice leaves, butterfly wings, and strider legs, various artificial superhydrophobic surfaces have been developed using physical and chemical approaches. However, many experimental phenomena and mechanism insights remain to be explored to facilitate further development of high-performance superhydrophobic surfaces. In addition, biomimetic surfaces with the uniqueness of water repellency have found remarkable enthusiasm in industrial applications, such as self-cleaning, anti-corrosion, anti-icing, liquid manipulation, oil–water separation, and so on. However, long-term use and maintenance of superhydrophobicity in harsh environments are still significant challenges. Therefore, we are pleased to invite you to contribute to a Special Issue on “Mechanisms and Applications of superhydrophobic surfaces” to encourage researchers to present their novel research findings on this topic. Contributions will focus on understanding fresh insights and applications of superhydrophobic surfaces with high mechanical durability. In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following:

  • Designs and preparations of superhydrophobic surfaces by directed energy techniques, such as ion, electron, and laser beams, and/or chemical coatings, such as dip coating, spin coating, and spray-up techniques.
  • Synthesis of novel superhydrophobic organic/inorganic coating materials.
  • New understanding and insight based on detailed characterization of coatings and processes.
  • Isotropic and anisotropic wettability.
  • The sustainability and durability of superhydrophobic surfaces.
  • Self-healing wettability.
  • Life-cycle and recyclability of coatings.
  • Various applications of superhydrophobic surfaces (self-cleaning, anti-corrosion, anti-icing, liquid manipulation, oil-water separation, and so on).

Dr. Chi-Vinh Ngo
Guest Editor

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Keywords

  • laser-matter interactions
  • superhydrophobic coatings
  • surface functionalization
  • multiscale structures
  • durability
  • self-cleaning
  • anti-corrosion
  • anti-icing
  • oil-water separation
  • water manipulation

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Published Papers (2 papers)

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Research

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19 pages, 14311 KiB  
Article
Modified Graphene Micropillar Array Superhydrophobic Coating with Strong Anti-Icing Properties and Corrosion Resistance
by Wanyu Zhang, Fuchun Liu, Yushan Li, Tao Chen, Izuchukwu Kenneth Nwokolo, Sharjeel Ahmed and En-Hou Han
Coatings 2024, 14(3), 247; https://doi.org/10.3390/coatings14030247 - 20 Feb 2024
Cited by 3 | Viewed by 1758
Abstract
Ice accumulation on outdoor surfaces tends to cause a series of serious accidents in extreme climates. In recent years, superhydrophobic coatings have garnered significant interest in the passive anti-icing field owing to their exceptional ability to repel water. However, these superhydrophobic coatings displayed [...] Read more.
Ice accumulation on outdoor surfaces tends to cause a series of serious accidents in extreme climates. In recent years, superhydrophobic coatings have garnered significant interest in the passive anti-icing field owing to their exceptional ability to repel water. However, these superhydrophobic coatings displayed inadequate anti-icing properties in conditions of low temperature and high humidity, as well as poor corrosion resistance after prolonged immersion. Herein, we prepared a series of modified graphene micropillar array superhydrophobic coatings that have various micropillar widths based on simple physical embossing and spraying techniques. These coatings combined the graphene nanosheets modified by perfluorodecyl triethoxysilane (AC-FAS) and the fluorocarbon varnish coating with a micropillar array structure to gain great superhydrophobicity and anti-icing properties. Among these, the average freezing delay time of the Q200G coating increased over 500 times relative to the unmodified Al surface (about 10 s), and its average deicing shear force was as low as 0.1 N. Meanwhile, the corrosion resistance increased steadily as the micropillar width decreased, based on the electrochemical impedance spectroscopy test results. More importantly, such facile fabrication methods and multi-functionality make superhydrophobic coatings hold great application prospects. Full article
(This article belongs to the Special Issue Mechanisms and Applications of Superhydrophobic Surfaces)
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Review

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19 pages, 7827 KiB  
Review
Metal–Organic Frameworks-Based Membranes with Special Wettability for Oil–Water Separation: A Review
by Teng Liu, Qijin Tang, Tong Lu, Can Zhu, Shudi Li, Cailong Zhou and Hao Yang
Coatings 2023, 13(7), 1241; https://doi.org/10.3390/coatings13071241 - 12 Jul 2023
Cited by 10 | Viewed by 2361
Abstract
The presence of oily wastewater poses a significant threat to both the ecological environment and public health. In order to solve this problem, the design and preparation of an efficient oil–water separation membrane is very important. Metal–organic frameworks (MOFs) are currently a promising [...] Read more.
The presence of oily wastewater poses a significant threat to both the ecological environment and public health. In order to solve this problem, the design and preparation of an efficient oil–water separation membrane is very important. Metal–organic frameworks (MOFs) are currently a promising material for oil–water separation due to their tunable wettability, adjustable pore size and also low density, high porosity, and high surface area. Therefore, MOFs-based membranes show great potential in the field of oil–water separation. In this paper, we first introduce the oil–water separation mechanism and then comprehensively summarize the common preparation methods of MOFs-based oil–water separation membranes and the research progress of different MOFs-based membranes, including the ZIF series, UiO series, MIL series, etc. Finally, we also analyze the challenges faced by MOFs-based membranes in oil–water separation and provide an outlook on their future development and application. Full article
(This article belongs to the Special Issue Mechanisms and Applications of Superhydrophobic Surfaces)
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