Role of Surface Topography in the Superhydrophobic Effect—Experimental and Numerical Studies

Ibrahim, S. H.; Wejrzanowski, Tomasz; Przybyszewski, Bartłomiej; Kozera, Rafał; García‐Casas, Xabier; Barranco, Ángel

doi:10.3390/ma15093112

Cited by 8 publications

(5 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A contact angle of less than 90° is usually considered hydrophilic, while a contact angle greater than 90° is indicative of hydrophobic behavior. If the contact angle of water droplets on the wood surface exceeds 150°, the surface is classified as superhydrophobic [ 29 ]. When water droplets were placed on the surface of eight untreated wood samples, the droplets immediately spread out on the surface, exhibiting a water contact angle close to 0°, which is indicative of good wettability and confirms that wood is a hydrophilic material.…”

Section: Resultsmentioning

confidence: 99%

Study on the Difference of Superhydrophobic Characteristics of Different Wood Furniture Substrates

et al. 2023

View full text Add to dashboard Cite

To enhance the stability of wood and decrease restrictions on its use in the furniture industry, hydrophobic modification can be employed to confer waterproof, anti-fouling, and self-cleaning properties. The present study outlines the preparation of silica sol using the sol–gel method, followed by impregnation and chemical vapor deposition methods to modify the sol. After grafting 1H,1H,2H,2H-perfluoro-decyl trichlorosilane (FDTS), hydrophobic and superhydrophobic properties were imparted to the wood substrate. To explore the correlation between the surface properties of the wood substrate and superhydrophobic coatings, the densities, porosities, and surface roughness of various tree species were compared. The results showed that the sol–gel method successfully constructed hydrophobic coatings on different wood substrates, with six samples (poplar, elm, toon wood, paulownia, ashtree, and black walnut) achieving superhydrophobic surfaces, with densities ranging from 0.386 to 0.794 g/cm3, porosity ranging from 13.66 to 42.36%, roughness ranging from 4.660 to 11.244 um, and maximum water contact angle of 165.2°. Whereas beech and rosewood only reach the hydrophobic surface. Although the coatings demonstrated good resistance to water, pollutants, self-cleaning, and chemical agents, further improvements are necessary to enhance mechanical wear resistance.

show abstract

Section: Resultsmentioning

confidence: 99%

Study on the Difference of Superhydrophobic Characteristics of Different Wood Furniture Substrates

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Baldan [ 16 ] underlined that the relationship between surface roughness and adhesion phenomenon is a rather complex relationship; it is not unequivocal. Ibrahim et al [ 51 ] pointed out that both the chemical composition and topography of the surface influence the wetting phenomenon is considered.…”

Section: Discussionmentioning

confidence: 99%

“…In the case of these samples, the application of mechanical treatment creates a large number of cavities that allow the adhesive to penetrate and obtain strong mechanical anchors, and thus prevent failure at the interface of both phases. Ibrahim et al [ 51 ] underlined that the shape of peaks is the most important feature of the surface topography.…”

Section: Discussionmentioning

confidence: 99%

Assessment of Surface Treatment Degree of Steel Sheets in the Bonding Process

et al. 2022

View full text Add to dashboard Cite

The aim of the paper is to determine the influence of the surface treatment on the adhesive properties of steel sheet surfaces and the strength of the adhesive joints of steel sheets. The paper also aims to assess the degree of steel sheets’ surface treatment in the bonding process. Due to the many methods of surface treatment and types of materials, the assessment of the surface treatment method is extremely important in adhesive processes. Two variants of the surface treatment were used: without a paint coating and with a paint coating, divided into two groups (without degreasing and with degreasing). Additionally, in the case of the analysis of the steel samples without the paint coating, mechanical treatment was applied. Two-component epoxy adhesive, prepared on the basis of bisphenol A and a polyamide curing agent, was used to prepare the single-lap adhesive joints of the steel sheets. The tests determined: (i) the adhesive properties of the steel sheets’ surface based on the measurement of the contact angle of polar and apolar liquids (including wettability, work of adhesion, and surface free energy), (ii) surface roughness parameters (PN EN ISO 4287), and (iii) mechanical properties (load capacity and shear strength) of the steel sheets’ adhesive joints (EN DIN 1465). Contact angle measurements of the steel sheet surfaces showed that the polar liquid better reflects the obtained strength results of the analyzed adhesive joints than the apolar liquid. Furthermore, better wettability of the surface of steel sheets with both polar and apolar liquids was obtained for samples whose surface was subjected to degreasing. It can also be concluded that the wettability of the surface can be used as one of the indicators of the degree of the surface treatment for the bonding process.

show abstract

“…The regular or irregular distributions of papillae greatly affect the wettability of the surface. Numerical simulations and experiments have been conducted to analyze the effects of the morphology and distribution of the microstructures on hydrophobic surfaces (Haj Ibrahim et al, 2022). Randomly textured surfaces (Khandoker and Golovin, 2020) and regular square lattice arrangement (Marmur, 2004) were analyzed to study the effects of different arrangements in Figure 6.…”

Section: Arrangement Of Papillaementioning

confidence: 99%

Factors influencing wettability and surface/interface mechanics of plant surfaces: a review

Tie,

Gao,

Huang

et al. 2023

Front. Mater.

View full text Add to dashboard Cite

A wide variety of abundant plant leaves exist in nature, and the wettability of their surfaces is formed to adapt to diverse external environments. In this paper we will focus on the factors influencing the wettability of various plant leaves prevalent in nature. And we hope to investigate the interfacial problems of plants from a mechanical point of view. It is found that there are many factors affecting the surface wettability of leaves, such as chemical composition, surface microstructures, hierarchical structures, and growth age. Different influencing factors have different contributions to the change of surface wettability. The surface wax composition influences the surface wettability from a chemical point of view while the hierarchical structure consisting of nanostructures and micron structures also influences the wettability from a structural point of view. Also as the growth age of the plant increases, there is a combined effect on the chemical composition and microstructure of the leaves. Then we discuss the surface/interface mechanics of droplets on various plant leaves and analyze the wetting properties of droplets on different substrates. Finally, we hope that the surface/interface mechanics of plant leaves may be systematically utilized in the future for the preparation of multifunctional biomimetic materials, realizing the crossover of chemistry, biology, mechanics, and other materials science fields.

show abstract

Role of Surface Topography in the Superhydrophobic Effect—Experimental and Numerical Studies

Cited by 8 publications

References 53 publications

Study on the Difference of Superhydrophobic Characteristics of Different Wood Furniture Substrates

Study on the Difference of Superhydrophobic Characteristics of Different Wood Furniture Substrates

Assessment of Surface Treatment Degree of Steel Sheets in the Bonding Process

Factors influencing wettability and surface/interface mechanics of plant surfaces: a review

Contact Info

Product

Resources

About