Super dewetting surfaces: Focusing on their design and fabrication methods

Motlagh, Naser Valipour; Khani, Rouhollah; Rahnama, Saeed

doi:10.1016/j.colsurfa.2015.08.037

Cited by 30 publications

(6 citation statements)

References 204 publications

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“…The fragile network was stabilized by deposition of a silica shell using chemical vapor deposition (CVD) of tetraethyl orthosilicate (TEOS) for 24, 48, and 72 h. These samples are referred to as coated soot. The thickness of the deposited silica layer increased with CVD time and ranged from [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35], and 60-100 nm for 24, 48, and 72 h, respectively. The coated soot was sintered at 600 °C, 800 °C, 1000 °C, or 1150 °C for 3 h. Thereby, the carbon was completely combusted and the sintered samples are therefore referred to as soot-templated silica.…”

Section: Resultsmentioning

confidence: 99%

“…They can be drop, dip, spin, or (electro)spray coated onto various substrates. [ 6,[19][20][21][22][23][24][25][26][27] The precursor solutions can also be fl ame sprayed onto substrates [ 28,29 ] or soot from the combustion of organic compounds can be collected to obtain porous layers of particles. [ 30,31 ] The prepared coatings, however, often suffer from low mechanical strength.…”

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confidence: 99%

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Mechanical Properties of Highly Porous Super Liquid‐Repellent Surfaces

Paven

Fuchs

Yakabe

et al. 2016

Adv Funct Materials

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Surfaces with self‐cleaning properties are desirable for many applications. Conceptually, super liquid‐repellent surfaces are required to be highly porous on the nano‐ or micrometer scale, which inherently makes them mechanically weak. Optimizing the balance of mechanical strength and liquid repellency is a core aspect toward applications. However, quantitative mechanical testing of porous, super liquid‐repellent surfaces is challenging due to their high surface roughness at different length scales and low stress tolerance. For this reason, mechanical testing is often performed qualitatively. Here, the mechanical responses of soot‐templated super liquid‐repellent surfaces are studied qualitatively by pencil and finger scratching and quantitatively by atomic force microscopy, colloidal probe force measurements, and nanoindentation. In particular, colloidal probe force measurements cover the relevant force and length scales. The effective elastic modulus, the plastic work Wplastic and the effective adhesive work Wadhesive are quantified. By combining quantitative information from force measurements with measurements of surface wetting properties, it is shown that mechanical strength can be balanced against low wettability by tuning the reaction parameters.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Mechanical Properties of Highly Porous Super Liquid‐Repellent Surfaces

Paven

Fuchs

Yakabe

et al. 2016

Adv Funct Materials

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“…Amphiphobic surfaces with both water- and oil-repellent properties have been developed for potential applications, such as self-cleaning, corrosion resistance, membrane distillation, and so on. They could be fabricated via various methods in which a specific rough structure is commonly involved. This can be achieved by the substrate surface roughening method before coating, such as etching, deposition of nanomaterials, or both .…”

Section: Introductionmentioning

confidence: 99%

Transparent and Flexible Amphiphobic Coatings with Excellent Fold Resistance via Solvent-Free Coating and Photocuring of Fluorinated Liquid Nitrile–Butadiene Rubber

Pan

Song

Liu

2021

ACS Appl. Mater. Interfaces

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Amphiphobic surfaces have been developed for various applications. However, the harsh construction conditions and multistep processes limit their practical application. Especially for those with a particular surface roughness and morphology, the amphiphobic property might provide a slight deformation. Here, a facile large-area construction of transparent and flexible amphiphobic coatings with excellent fold resistance has been established by simple casting of the fluorinated liquid nitrile–butadiene rubber (F-LNBR) followed by solvent-free photocuring. It was found that the fluorocarbon groups could concentrate onto the coating surface during the UV-induced photocuring. With a certain coating amount, a stable oleophobic coating was achieved with static contact angles of about 95° and 111° for nonpolar oil (n-hexadecane) and polar oil (diiodomethane). Most importantly, the static contact angles of water and diiodomethane of the amphiphobic coatings on the iron sheet increased after bending and remained around 131° and 120° after being completely folded in half for 100 cycles because the inner fluorocarbon groups could be squeezed out from the flexible cross-linked rubber matrix as a reservoir. Such features indicated the promising self-cleaning and surface protection of the proposed transparent and flexible amphiphobic coatings for deformable substrates.

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“…Generally, it is preferable to introduce microand nanoscale hierarchical structures into the substrates for ensuring superhydrophobicity after surface damage. Techniques such as chemical etching-anodic oxidation [29] and acid etching-boiling water immersion [30] are often used to create multiscale structures which are then hydrophobized by low surface energy modifier.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Superhydrophobic Multiscale Films for Oil-Water Separation in a Harsh Environment

Fan

Chen

et al. 2019

Advances in Materials Science and Engineering

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The problem of oil-water separation regarding oil-containing brine has been of much concern when using the oil pad water dissolution method to construct salt cavern reservoirs. In this paper, oil-water separation materials with micro-nano hierarchical structure were prepared on different metal substrates using chemical etching and electrophoretic deposition. And hydrophobic materials with a single micro/nano structure were also prepared; then, the surfaces were hydrophobized by various low surface energy modifiers. Thereafter, we analyzed and compared the surface morphology, chemical composition, and wettability of all the materials and found that brine contact angles on hierarchical structure surfaces were above 160° while the diesel was completely diffused. Furthermore, preparation parameters affecting the surface morphology and wettability of micro-nano composite structures were explored. Meanwhile, it was found that the surface of prepared composite structure could still maintain super-hydrophobic/lipophilic properties after exposure in air for 6 months, sliding 60 cm on sandpaper, or immersion in diesel/brine for 48 h. Moreover, the composite structure surface displayed improved corrosion resistance with corrected self-corrosion potential and lower corrosion current density. It was equally observed that the studied materials could be better adapted to the actual context of salt cavern reservoir construction and thus have great application prospects.

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Super dewetting surfaces: Focusing on their design and fabrication methods

Cited by 30 publications

References 204 publications

Mechanical Properties of Highly Porous Super Liquid‐Repellent Surfaces

Mechanical Properties of Highly Porous Super Liquid‐Repellent Surfaces

Transparent and Flexible Amphiphobic Coatings with Excellent Fold Resistance via Solvent-Free Coating and Photocuring of Fluorinated Liquid Nitrile–Butadiene Rubber

Preparation of Superhydrophobic Multiscale Films for Oil-Water Separation in a Harsh Environment

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