Science and Engineering of Superhydrophobic Surfaces: Review of Corrosion Resistance, Chemical and Mechanical Stability

Darband, Gh. Barati; Aliofkhazraei, M.; Khorsand, S.; Sokhanvar, Saeed; Kaboli, Afrooz

doi:10.1016/j.arabjc.2018.01.013

Cited by 347 publications

(159 citation statements)

References 334 publications

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“…Taking into account that the number of alkoxy and hydroxy group is not constant, the water environment is applied as the next step of hydrophobicity durability testing. Immersion in water leads to a slight but noticeable CA reduction (Figure 9c), and hence a different to alcohol model of behaviour is observed [60]. However, within the first 18 hours of the bath, contact angle still remains above the superhydrophobic limit (CA 151.8 • ), the water environment leads to loss of hydrophobicity rather quickly which is proved by CA change of about 5 • every 24 h. It is worth noting that the curve has a similar course to the modified vacuum Al 2 O 3 &SiO 2 immersed in alcohol [38].…”

Section: Characterization Of Superhydrophobicity Durability Of Coatingsmentioning

confidence: 92%

“…In this work, it was decided to obtain the desired roughness profile by adjusting the shape and size of cold sprayed particles [49,[54][55][56][57][58][59]. Low surface energy was ensured by appropriate chemical functionalization of these particles [30,50,60]. All these important powder parameters, i.e., required size, shape, and functionality of particles were achieved thanks to the adaptation of the sol-gel method for the feedstock powder production.…”

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confidence: 99%

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Prospects of Low-Pressure Cold Spray for Superhydrophobic Coatings

et al. 2019

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A major challenge in materials engineering is the development of new materials and methods and/or novel combination of existing ones, all fostering innovation. For that reason, this study aims at the synergy between low-pressure cold spray (LPCS) as a tool for coating deposition and sol-gel technique for fabrication of the feedstock powder. The complementarity of both methods is important for the examined topic. On one side, the LPCS being automized and quick mean provides the solid-state of feedstock material in nondestructive conditions and hence the hydrophobicity imparted on the sol-gel route is preserved. On the other side, the sol-gel synthesis enables the production of oxide materials with enhanced deformability due to amorphous form which supports the anchoring while LPCS spraying. In the paper, several aspects including optimal fluoroalkylsilane (FOTS) concentration or substrate roughness are examined initially for altering the superhydrophobicity of produced coatings. Further, it is shown that the appropriate optimization of feedstock powder, being submicron silica matrices covered with two-layer FOTS sheath, may facilitate the anchoring process, support roughening the substrate or cause enhancement the coating hydrophobicity. All the discussion is supported by the characteristics including surface morphology, wettability and thermal behaviour examined by electron microscopy, water contact angle measurements and thermal analysis (TGA/DSC), respectively. The coatings presented in the paper are characterized by an uneven thickness of up to a few silica particles, but final hydrophobicity is provided uniformly on the surface by the formation of multi-level roughness by a detachment of outer layer from the SiO2 particles. Thus, the presented approach constitutes a simple and fast solution for the fabrication of functionalized coatings using LPCS including industrial potential and fundamental research character.

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Section: Characterization Of Superhydrophobicity Durability Of Coatingsmentioning

confidence: 92%

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confidence: 99%

Prospects of Low-Pressure Cold Spray for Superhydrophobic Coatings

et al. 2019

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“…Indeed, the fabrication of bioinspired superhydrophobic surfaces has attracted many scientists, and great efforts have been devoted to understand the mechanisms which produce this effect, as well as to select materials and methods of fabrication. Therefore, the literature provides many examples of these bioinspired surfaces, which are exploited for many applications, but attention on the stability of wetting properties and durability of the superhydrophobic surfaces has only been taken into consideration recently [123][124][125].…”

Section: Droplet Impact On Superhydrophobic Surfaces and Wetting Stabmentioning

confidence: 99%

Current Status and Future Prospects of Applying Bioinspired Superhydrophobic Materials for Conservation of Stone Artworks

2020

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The development of innovative materials is one of the most important focus areas in heritage conservation research. Eligible materials can not only protect the physical and chemical integrity of artworks but also preserve their artistic and aesthetic features. Recently, as one of the hot research topics in materials science, biomimetic superhydrophobic materials have gradually attracted the attention of conservation scientists due to their unique properties. In fact, ultra-repellent materials are particularly suitable for hydrophobization treatments on outdoor artworks. Owing to their excellent hydrophobicity, superhydrophobic materials can effectively prevent the absorption and penetration of liquid water as well as the condensation of water vapor, thus greatly relieving water-induced decay phenomena. Moreover, in the presence of liquid water, the superhydrophobic surfaces equipped with a self-cleaning property can clean the dirt and dust deposited spontaneously, thereby restoring the artistic features simultaneously. In the present paper, besides the basic principles of wetting on solid surfaces, materials, and methods reported for preparing bioinspired ultra-repellent materials, the recently proposed materials for art conservation are also introduced and critically reviewed, along with a discussion on the droplet impact and durability of the artificial superhydrophobic surfaces. Lastly, the current status and the problems encountered in practical application are also pointed out, and the focus of future research is presented as well.

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“…Although cotton fibers have many advantages, such as softness, comfort, and widespread applicability [2], they cannot be employed in many areas, due to their high hydroxyl group content and hydrophilicity, which may reduce the mechanical properties of the materials and promote the growth of microorganisms (fungi, mold, and bacteria) [3]. Super-hydrophobicity, with a water contact angle (WCA) above 150 • and a sliding angle (SA) below 10 • , demonstrates the self-cleaning performance of cotton fabrics, which is one of the most desirable textile properties of cotton fabrics for outdoor sports or medical clothing textiles [4,5]. The traditional method to obtain a super-hydrophobic surface is to follow the lotus leaf model, in which a low-surface-energy material is combined with a specific topographical micro-nano-hierarchical structure on the surface of the material to afford the material the ability of self-cleaning.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Plasma Electron Temperature on the Surface Properties of Super-Hydrophobic Cotton Fabrics

Lai

Liu

et al. 2020

Coatings

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The existing coating systems used for the preparation of super-hydrophobic surfaces are facing new challenges because the use of organic solvents and long-carbon-chain organic fluorine monomers is banned. In this article, the authors have proven that by using inductively coupled plasma-enhanced chemical vapor deposition (PECVD) with argon (Ar), which is a completely dry process, lauryl methacrylate (LMA) can produce a stable super-hydrophobic coating effect. The effect of electron temperature on the super-hydrophobicity of cotton fabrics is investigated in terms of water repellency, chemical composition, and surface morphology. It is found that the improvement in the hydrophobicity of cotton fabric is attributed to the deposition of alkyl and ester groups, and the formation of a micro-nano-structure on the surface of the fabric after plasma treatment. The electron temperature plays an important role in achieving the super-hydrophobicity of cotton fabrics. The plasma-enhanced coating may offer a safe and dry super-hydrophobic technique with diverse applications.

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Science and Engineering of Superhydrophobic Surfaces: Review of Corrosion Resistance, Chemical and Mechanical Stability

Cited by 347 publications

References 334 publications

Prospects of Low-Pressure Cold Spray for Superhydrophobic Coatings

Prospects of Low-Pressure Cold Spray for Superhydrophobic Coatings

Current Status and Future Prospects of Applying Bioinspired Superhydrophobic Materials for Conservation of Stone Artworks

The Effect of Plasma Electron Temperature on the Surface Properties of Super-Hydrophobic Cotton Fabrics

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