Superhydrophobic Polymers

Wolfs, Mélanie; Darmanin, Thierry

doi:10.1002/0471440264.pst594

Cited by 5 publications

(4 citation statements)

References 228 publications

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“…When water is dropped on such a surface, it rolls or bounces off and leaves the surface eventually. To create an SHS, the surface has to be composed of or coated with an intrinsically hydrophobic material and the surface topography must be very rough, featuring appropriate micro- or nanostructures. − Motivated by a plethora of attractive potential applications, ,,− tremendous effort has been devoted to understanding ,,− and mimicking natural superhydrophobicity. , In the process, SHS out of many different materials have been created. − …”

Section: Introductionmentioning

confidence: 99%

Molting Materials: Restoring Superhydrophobicity after Severe Damage via Snakeskin-like Shedding

2017

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The nanostructures that are required to generate superhydrophobic surfaces are always sensitive to shear and are easily damaged, especially by scratching with sharp objects. As a result of this destruction, the water repellency will be lost. We introduce a novel approach to restoring the original surface properties after mechanical damage. In this approach, the damaged layer is shed like the skin of a snake. This is demonstrated with a three-layer stack as a proof-of-principle system: when the original, superhydrophobic surface layer is damaged, this leads to the dissolution of a sacrificial layer below it. Thus, the damaged layer is shed, a new unscathed surface is uncovered, and superhydrophobicity can easily be restored after a short washing.

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Section: Introductionmentioning

confidence: 99%

Molting Materials: Restoring Superhydrophobicity after Severe Damage via Snakeskin-like Shedding

2017

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“…A variety of treatment methods are available for the design of structural solutions suitable for the intended purpose. Of particular importance are the hydrophobic properties of polymeric surfaces [9,10], which are often determined by their morphology and roughness, as well as chemical composition. The application of, amongst others, fl uorine compounds, leads to very low values of surface free energy (SFE).…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Wettability of Protective Glove Materials: A Biomimetic Perspective

Irzmańska

Jastrzębska

Kaczmarek

et al. 2021

Autex Research Journal

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The objective of the present work was to evaluate the surface wettability of commercially available polymeric protective gloves, as well as to determine the effects of their surface topography in conjunction with the glove material on the hydrophobic properties of the final products, together with surface free energy (SFE) and work of adhesion. The geometric structures imparted to the surface led to different levels of hydrophobicity and SFE. Most of the studied materials were characterized by good wettability properties. It was shown that a textured surface topography affects wettability. The highest SFE was found for nitrile butadiene rubber materials. All materials except for nitrile butadiene rubber exhibited good hydrophobic properties and relatively low work of adhesion.

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“…Stimulated by the many attractive potential applications, , tremendous effort has been made to understand and mimic natural superhydrophobicity. ,− In this process, many different SHSs have been created. − …”

Section: Introductionmentioning

confidence: 99%

“Nickel Nanoflowers” with Surface-Attached Fluoropolymer Networks by C,H Insertion for the Generation of Metallic Superhydrophobic Surfaces

Hönes

Rühe

2018

Langmuir

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Metallic superhydrophobic surfaces (SHSs) combine the attractive properties of metals, such as ductility, hardness, and conductivity, with the favorable wetting properties of nanostructured surfaces. Moreover, they promise additional benefits with respect to corrosion protection. For the modification of the intrinsically polar and hydrophilic surfaces of metals, a new method has been developed to deposit a long-term stable, highly hydrophobic coating, using nanostructured Ni surfaces as an example. Such substrates were chosen because the deposition of a thin Ni layer is a common choice for enhancing corrosion resistance of other metals. As the hydrophobic coating, we propose a thin film of an extremely hydrophobic fluoropolymer network. To form this network, a thin layer of a fluoropolymer precursor is deposited on the Ni substrate which includes a comonomer that is capable of C,H insertion cross-linking (CHic). Upon UV irradiation or heating, the cross-linker units become activated and the thin glassy film of the precursor is transformed into a polymer network that coats the surface conformally and permanently, as shown by extensive extraction experiments. To achieve an even higher stability, the same precursor film can also be transformed into a chemically surface-attached network by depositing a self-assembled monolayer of an alkane phosphonic acid on the Ni before coating with the precursor. During cross-linking, by the same chemical process, the growing polymer network will simultaneously attach to the alkane phosphonic acid layer at the surface of the metal. This strategy has been used to turn fractal Ni "nanoflower" surfaces grown by anisotropic electroplating into SHSs. The wetting characteristics of the obtained nanostructured metallic surfaces are studied. Additionally, the corrosion protection effect and the significant mechanical durability are demonstrated.

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Superhydrophobic Polymers

Cited by 5 publications

References 228 publications

Molting Materials: Restoring Superhydrophobicity after Severe Damage via Snakeskin-like Shedding

Molting Materials: Restoring Superhydrophobicity after Severe Damage via Snakeskin-like Shedding

Experimental Investigation of the Wettability of Protective Glove Materials: A Biomimetic Perspective

“Nickel Nanoflowers” with Surface-Attached Fluoropolymer Networks by C,H Insertion for the Generation of Metallic Superhydrophobic Surfaces

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