Water repellent coatings with hierarchal structures obtained on anodized aluminum with femtosecond laser ablation

Myronyuk, Oleksiy; Raks, Viktoria; Baklan, Denys; Vorobyova, Viktoria; Vanagas, Egidijus; Kurdil, N.V.; Sivolapov, Pavlo

doi:10.1007/s13204-021-01697-8

Cited by 4 publications

(2 citation statements)

References 33 publications

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“…The microtexture for sample "M" was in the form of pyramids, and for samples "B", "C", and "E", it was in the form of linear grooves. The void-shaped texture was not used due to low efficiency [31]. A blank degreased aluminum plate was used as a reference surface.…”

Section: Sample Texture Formationmentioning

confidence: 99%

Owens–Wendt Characterization of Femtosecond-Laser-Textured Hydrophobic Aluminum Surfaces

et al. 2023

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The eligibility of applying the Owens–Wendt approach to determining the free surface energy of liquid-repellent aluminum surfaces, with micro- and nanotextures formed by a femtosecond laser, was considered. This approach has been shown to be applicable using two essential parameters that can be derived from the graphs. The first is related to the fraction of the contact area between the liquid and the solid surface in the Cassie state. The second is related to the degree of intrinsic polarity of the surface material or the applied organic modifier. The presented interpretation was used to compare the liquid repellency of the obtained textures. A microtexture with a period of 60 μm and a groove width of 45 μm has been shown to be the most liquid repellent. Among the modifiers, 1H,1H,2H,2H-perfluoroctyltriethoxysilane was the most effective, and stearic acid was only slightly inferior, but promising in terms of cost and environmental friendliness. It was shown that spontaneous hydrophobization provided a contact angle with water up to 159°, but the stability of such textures was inferior to the considered modifiers.

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Section: Sample Texture Formationmentioning

confidence: 99%

Owens–Wendt Characterization of Femtosecond-Laser-Textured Hydrophobic Aluminum Surfaces

et al. 2023

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“…The surface structure also has a significant effect on wetting: as a rule, the presence of irregularities on the surface significantly increases the output wetting ability [3,4]. That is, a relief hydrophilic surface will be wetted much easier than a flat surface of the same material, and vice versa -an increase in roughness by a hydrophobe is accompanied by a more pronounced repulsion of water.…”

Section: Introductionmentioning

confidence: 99%

Formation of effective concentration of film forming superhydrophobic coatings based on silicon dioxide

Sivolapov

Myronyuk

Baklan

et al. 2021

TAPR

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The object of research is the hydrophobization of a coating based on styrene-acrylic copolymer and cellulose acetate butyrate with pyrogenic silicon dioxide. The hydrophobicity or hydrophilicity of a surface depends mainly on the chemical structure of the surface and its roughness. A relief hydrophilic surface will be wetted much more easily than a flat surface of the same material, and vice versa – an increase in the roughness of a hydrophobe is accompanied by a more pronounced repulsion of water. The size and number of irregularities significantly affect the wetting characteristics of the investigated surface. The combination of low surface energy and relief structure forms a superhydrophobic surface. Such surfaces have found application in self-cleaning, frost-resistant, antifriction, electrically conductive and oil-sorbing coatings. In this work, styrene-acrylic copolymer and cellulose acetate butyrate were used as a film former. Pyrogenic silicon dioxide Aerosil R 972, which was hydrophobized with dimethyldichlorosilane, was used as a nanofiller. In this work, the compositions were applied to laboratory glasses by dip coating. The determination of surface energy was carried out using glycerin and diiodomethane. The hydrophobic properties of the coatings were evaluated by measuring the contact angles with water using a goniometer. The analysis of the morphological structure of the coating surface with photographs of a scanning electron microscope has been carried out. The energy state of the surface of the created superhydrophobic coatings has been determined and their surface energies have been calculated using the technique based on the Owens-Wendt model. The process of hydrophobization of polymer-based coatings is investigated, which occurs both due to chemical modification with the introduction of silicon dioxide and due to the creation of nanoroughness of the surface layer of the coatings. The dependences of this process on materials are investigated using an electron microscope and the determination of their surface energy depending on the SiO2 filling. The values of the critical concentration of the modifier for the transition of polymers to the superhydrophobic state have been determined. As a result, the influence of polymer crystallinity on hydrophobization was determined by comparing changes in the surface energy of materials during their modification.

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Synthesis of Stober silica nanoparticles in solvent environments with different Hansen solubility parameters

Sivolapov

Myronyuk²,

Baklan³

2022

Inorganic Chemistry Communications

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Water repellent coatings with hierarchal structures obtained on anodized aluminum with femtosecond laser ablation

Cited by 4 publications

References 33 publications

Owens–Wendt Characterization of Femtosecond-Laser-Textured Hydrophobic Aluminum Surfaces

Owens–Wendt Characterization of Femtosecond-Laser-Textured Hydrophobic Aluminum Surfaces

Formation of effective concentration of film forming superhydrophobic coatings based on silicon dioxide

Synthesis of Stober silica nanoparticles in solvent environments with different Hansen solubility parameters

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