Stable and Durable Conductive Superhydrophobic Coatings Prepared by Double-Layer Spray Coating Method

Liu, Xiang; Chen, Kai; Zhang, Dekun; Guo, Zhiguang

doi:10.3390/nano11061506

Cited by 23 publications

(9 citation statements)

References 48 publications

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“…The evaluation of mechanical flexibility, scratching and cutting robustness, thermal shock-and fire resistance, jetting endurance and adhesion strength of the soot fabrics involved a few well-established control tests. 59,60 All samples were subjected to abrasive wear by rubbing them to the surface of a P1200 sandpaper under an applied load of 200 g, analogously to foregoing studies. 44,61 Then, the surface adhesion was analyzed via an ASTM D3359 standard tape test, while the underwater stability was estimated by high-velocity (∼25 m/s) water jetting.…”

Section: Methodsmentioning

confidence: 99%

On the Development of Ultradurable Extremely Water-Repellent and Oleophobic Soot-Based Fabrics with Direct Relevance to Sperm Cryopreservation

Esmeryan

Fedchenko

Gyoshev

et al. 2022

ACS Appl. Bio Mater.

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Nowadays, the tremendous progress of nanotechnologies and materials science facilitates the fabrication of universal and multifunctional superhydrophobic surfaces on a large scale. Yet, integrating icephobic and anti-bioadhesive properties in an individual water-repellent functional coating, for addressing the difficulties faced by cryobiologists, aircraft, and seacraft manufacturers, is quite tricky but feasible if using nonpolar soot nanoparticles, whose fragility, however, impedes their industrial applicability. Here, we advance the current state-of-the-art to an extent, permitting the introduction of economically affordable and ultradurable non-wettable soot-based coatings. The deposition of rapeseed oil soot, cyanoacrylate glue and fluorine compounds onto different fabrics confers the latter with superior tolerance to harsh mechanical and thermal interventions [e.g., scratching, blade scraping, liquid nitrogen immersion (T ∼ −196 °C), torsion and water jetting], while in the meantime retaining water repellency and oleophobicity. The as-prepared soot fabrics can stick continuously to the selected host surface and favor the recovery of ∼60% of the initial motility of human spermatozoa subjected to cryopreservation or being detached and utilized as standalone non-wettable membranes. Our invention may be considered as the first fundamental stage of safely (without any health concerns) transferring the soot in reproductive medicine and developing enhanced cryogenic and antibacterial medical devices.

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Section: Methodsmentioning

confidence: 99%

On the Development of Ultradurable Extremely Water-Repellent and Oleophobic Soot-Based Fabrics with Direct Relevance to Sperm Cryopreservation

Esmeryan

Fedchenko

Gyoshev

et al. 2022

ACS Appl. Bio Mater.

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“…Electron microscopy photographs were taken with a REM-106 scanning electron microscope (Selmi, Ukraine). The wear resistance of the coatings was evaluated by a sand abrasion test [8]. The technique consists in spilling sand with a particle size of 200-500 µm through a tube 1.5 cm in diameter and 100 cm high, the feed rate was 50 g/min.…”

Section: Methodsmentioning

confidence: 99%

Analysis of water-repellent properties of coatings based on hydrophobized expanded perlite under mechanical abrasion

Myronyuk

Baklan

2022

TAPR

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The object of research in the work is water-repellent surfaces using crushed perlite to form micro-crushing. The existing problem lies in the fact that the level of existing technology of superhydrophobic coatings at the moment is insufficient for wide practical application. The main limiting difficulties are the insufficient resistance of superhydrophobic properties to operational factors, including mechanical wear, the action of vaporous water, as well as the low scalability of classical ways of applying textures to protected substrates. In this work, it is shown that one of the effective ways to obtain scalable coatings with increased water repellency is to use hollow glassy particles, such as perlite, to create a surface microstructure that allows one to achieve a stable Cassie state for water droplets. In this case, the contact area of the surface with the liquid is minimized, since fragments of hollow particles, the orientation of which is close to normal, are used in the coatings. Of practical interest in the application of such structures is the study of their behavior during mechanical wear, in particular, under the action of particles, which is an important operational factor for outdoor coatings. It is shown that coatings based on crushed perlite during abrasive wear retain and at the initial stage of destruction increase water-repellent properties. Crushed perlite was hydrophobized by treatment with polymethylhydrosiloxane, which provided the values of the wetting angle of the powder material at the level of 145°, and the rolling angle of less than 10°. The surface energy of the acrylic-styrene matrix coatings was determined. It is shown that the surface geometry of such coatings is inhomogeneous. An extreme dependence of the contact angles of the surface on the amount of abrasive was determined. As a result, it is found that under the static action of water, the expected decrease in the contact angle of the surface occurs, but there is no complete loss of the Cassie state.

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“…Besides, the contact angle of the coating remained beyond 150° in the back of 20 cycles of continuous abrasion by sandpaper, 1.5 h of droplet impact by water, or 20 cycles of tape peeling. [ 29 ] However, the surface morphology, corrosion resistance, and corrosion mechanism of this coating after a long time NSSAC test had not been studied yet.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Resistance and Corrosion Mechanism of the Superhydrophobic Coating Fabricated on Aluminum Alloy in the Salt Spray Corrosion Environment

Zhang

Gong

Zheng

et al. 2022

Physica Status Solidi (a)

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A superhydrophobic coating is introduced to spread on aluminum alloy via spraying of epoxy resin adhesive, F‐SiO2 nanoparticles, white fluorinated polyurethane coatings, and fluorosilicone varnishes. After a long time, the neutral salt spray accelerated corrosion (NSSAC) test, the surface morphology, and wettability of the superhydrophobic coating are individually characterized, and the corrosion mechanism, and variation law of corrosion resistance of the superhydrophobic coating are studied, respectively. When extending the time of the NSSAC test, the protruding micro–nano structure and cross‐linked network structure of the coating are increasingly dismantled, the contact angle of the coating is decreased gradually, and the corrosion current density (CCD) of the coating increases progressively. The protruding micro–nano structure is less damaged before the 5th d of the NSSAC test, while it almost completely disappears after 30 d of the NSSAC test. The contact angle of the coating is 162.35° before the NSSAC test, which remains greater than 150° when the NSSAC test is carried out for 7 d, but decreases to 119.63° after 70 d. The CCD of the coating increases to 4.62 × 10−7 A cm−2, which is two orders of magnitude lower than that of the non‐corroded 2A12 aluminum alloy, after 70 d of the NSSAC test.

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Stable and Durable Conductive Superhydrophobic Coatings Prepared by Double-Layer Spray Coating Method

Cited by 23 publications

References 48 publications

On the Development of Ultradurable Extremely Water-Repellent and Oleophobic Soot-Based Fabrics with Direct Relevance to Sperm Cryopreservation

On the Development of Ultradurable Extremely Water-Repellent and Oleophobic Soot-Based Fabrics with Direct Relevance to Sperm Cryopreservation

Analysis of water-repellent properties of coatings based on hydrophobized expanded perlite under mechanical abrasion

Corrosion Resistance and Corrosion Mechanism of the Superhydrophobic Coating Fabricated on Aluminum Alloy in the Salt Spray Corrosion Environment

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