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Superhydrophobic Coating Materials: Preparation, Strategy and Application
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Superhydrophobic Coating Materials: Preparation, Strategy and Application

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Thin Films and Interfaces".

Deadline for manuscript submissions: 20 October 2025 | Viewed by 2560

Special Issue Editor

Dr. Wei Tong

E-Mail Website
Guest Editor
School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore
Interests: surface engineering & coatings; wetting and interfaces; micro/nanofabrication; superhydrophobicity; icing & frosting resistance; droplet dynamics; condensation; corrosion protection; tribology & lubrication; superwetting materials

Special Issue Information

Dear Colleagues,

This Special Issue on “Superhydrophobic Coating Materials: Preparation, Strategy and Application” will collect high-quality original research articles or comprehensive reviews in this interdisciplinary field. Cutting-edge developments regarding this field are fostered through the convergence of Materials Science, Physics Chemistry, Engineering, Bionics, Surface and Interface Mechanics to design and manufacture smart superwetting materials that impact on real-world engineering applications.

Potential topics include, but are not restricted to, the following:

  • Superhydrophobic Functional Coatings (e.g., anti-icing, anti-frosting, anti-fogging, anti-fouling, anti-corrosion, and others);
  • Superhydrophobic and Superoleophobic Surfaces;
  • Micro and Nano Structure Design (e.g., laser, lithography, chemical etching, template copy, 3D/4D printing, and others);
  • Droplet Dynamics (e.g., condensation, heat transfer, phase change, simulation, adhesion, tribology, and others);
  • Solid–Liquid Interface (new theories, phenomena, mechanisms, applications, and others);
  • Design and Functionalization of Bionic Materials and Devices;
  • Superwetting Surfaces under Extreme Conditions and Sustainable Superwetting Materials.

Dr. Wei Tong
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • wetting
  • surface engineering
  • micro/nanofabrication
  • coating
  • solid–liquid interface
  • droplet
  • superwetting materials
  • bionics
  • simulation

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Published Papers (3 papers)

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Research

13 pages, 11291 KiB  
Article
Oily Long-Term Anti-Icing Coating Based on Hydrophobic Cross-Linking Composite Resin
by Zhen Xiao, Mingyang Du, Peining Li, Jingyu Liu, Xiaoyu Tian, Zhi Cheng and Shouren Wang
Materials 2025, 18(7), 1558; https://doi.org/10.3390/ma18071558 - 29 Mar 2025
Viewed by 182
Abstract
In this paper, a new type of passive anti-icing coating, i.e., interfacial lubrication coating, is proposed and investigated. The coating was prepared using the spin-coating or drop-coating method, and by adding hydrophobic and lipophilic modified particles to the hybrid resin to lock up [...] Read more.
In this paper, a new type of passive anti-icing coating, i.e., interfacial lubrication coating, is proposed and investigated. The coating was prepared using the spin-coating or drop-coating method, and by adding hydrophobic and lipophilic modified particles to the hybrid resin to lock up the oil, which can significantly reduce the adhesion between the surface and the ice, thus effectively preventing icing. The study systematically characterized the surface morphology, wettability, anti-icing properties, mechanical properties and durability of the four interfacial lubrication coatings. The results show that the hybrid resin-based coating based on fluorinated ethylene–vinyl ester copolymer (FEVE) and polyurethane (PU) exhibits the best anti-icing performance, with ice adhesion as low as 11 kPa and an extended icing delay time of 779 s. Meanwhile, the coating shows excellent long-term stability with virtually no increase in the ice shear strength after being left on the surface for 6 months. The durability mechanism analysis showed that the adsorption of hydrophobic and lipophilic modified nanoporous SiO2 on silicone oil and the structural properties of the coating with a dense surface and porous interior are the key factors for achieving the retardation of silicone oil release and maintain the lubricity. This study provides new ideas for the design of efficient and long-lasting anti-icing coatings. Full article
(This article belongs to the Special Issue Superhydrophobic Coating Materials: Preparation, Strategy and Application)
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16 pages, 5302 KiB  
Article
Wetting Transition from Wenzel to Cassie States: Thermodynamic Analysis
by Qiang Sun, Yan-Nan Chen and Yu-Zhen Liu
Materials 2025, 18(3), 543; https://doi.org/10.3390/ma18030543 - 24 Jan 2025
Viewed by 1014
Abstract
Superhydrophobicity is closely linked to the chemical composition and geometric characteristics of surface roughness. Building on our structural studies on water and air–water interfaces, this work aims to elucidate the mechanism underlying the wetting transition from the Wenzel to the Cassie state on [...] Read more.
Superhydrophobicity is closely linked to the chemical composition and geometric characteristics of surface roughness. Building on our structural studies on water and air–water interfaces, this work aims to elucidate the mechanism underlying the wetting transition from the Wenzel to the Cassie state on a hydrophobic surface. In the Wenzel state, the grooves are filled with water, meaning that the surface roughness becomes embedded in the liquid. To evaluate the effects of surface roughness on water structure, a wetting parameter (WRoughness) is proposed, which is closely related to the geometric characteristics of roughness, such as pillar size, width, and height. During the wetting transition from Wenzel to Cassie states, the critical wetting parameter (WRoughness,c) may be expected, which corresponds to the critical pillar size (ac), width (wc), and height (hc). The Cassie state is expected when the WRoughness is less than WRoughness,c (<WRoughness,c), which can be achieved by altering the geometric characteristics of the roughness, such as increasing pillar size (>ac), decreasing width (<wc), or increasing height (>hc). Additionally, molecular dynamic (MD) simulations are conducted to demonstrate the effects of surface roughness on superhydrophobicity. Full article
(This article belongs to the Special Issue Superhydrophobic Coating Materials: Preparation, Strategy and Application)
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15 pages, 7639 KiB  
Article
Superhydrophobic Surfaces as a Potential Skin Coating to Prevent Jellyfish Stings: Inhibition and Anti-Tentacle Adhesion in Nematocysts of Jellyfish Nemopilema nomurai
by Yichen Xie, Yuanyuan Sun, Rongfeng Li, Song Liu, Ronge Xing, Pengcheng Li and Huahua Yu
Materials 2024, 17(23), 5983; https://doi.org/10.3390/ma17235983 - 6 Dec 2024
Viewed by 867
Abstract
The development of skin-protective materials that prevent the adhesion of cnidarian nematocysts and enhance the mechanical strength of these materials is crucial for addressing the issue of jellyfish stings. This study aimed to construct superhydrophobic nanomaterials capable of creating a surface that inhibits [...] Read more.
The development of skin-protective materials that prevent the adhesion of cnidarian nematocysts and enhance the mechanical strength of these materials is crucial for addressing the issue of jellyfish stings. This study aimed to construct superhydrophobic nanomaterials capable of creating a surface that inhibits nematocyst adhesion, therefore preventing jellyfish stings. We investigated wettability and nematocyst adhesion on four different surfaces: gelatin, polydimethylsiloxane (PDMS), dodecyl trichlorosilane (DTS)-modified SiO2, and perfluorooctane triethoxysilane (PFOTS)-modified TiO2. Our findings revealed that an increase in hydrophobicity significantly inhibited nematocyst adhesion. Furthermore, DTS-modified sprayed SiO2 and PFOTS-modified sprated TiO2 were further enhanced with low-surface-energy substances—cellulose nanofibers (CNF) and chitin nanocrystals (ChNCs)—to improve both hydrophobicity and mechanical strength. After incorporating CNF and ChNCs, the surface of s-TiO2-ChNCs exhibited a contact angle of 153.49° even after undergoing abrasion and impact tests, and it maintained its hydrophobic properties with a contact angle of 115.21°. These results indicate that s-TiO2-ChNCs can serve as an effective skin coating to resist tentacle friction. In conclusion, this study underscores the importance of utilizing hydrophobic skin materials to inhibit the adhesion of tentacle nematocysts, providing a novel perspective for protection against jellyfish stings. Full article
(This article belongs to the Special Issue Superhydrophobic Coating Materials: Preparation, Strategy and Application)
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