Spray fabrication of superhydrophobic coating on aluminum alloy for corrosion mitigation

Gong, Ao; Zheng, Yong; Yang, Zekun; Guo, Xiaoge; Gao, Yan; Li, Xiaoyu

doi:10.1016/j.mtcomm.2020.101828

Cited by 28 publications

(15 citation statements)

References 35 publications

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“…This is an indication of the formation of a more porous and stable CS coating. Previous studies have shown that the combination of micro-nano rough structures improved the porosity and robustness of the developed coating compared to a coating with either nano or micro rough structures [5,9,14,21].…”

Section: Resultsmentioning

confidence: 99%

“…Depending on the nature of the substrate's material, various techniques have been used to impart rough structures onto surfaces such as dip coating [12], laser ablation [13][14][15], glancing-angle deposition (GLAD) [16], chemical vapor deposition (CVD) [17], Electrospinning [18], sol-gel processing [19], spray coating [20,21], self-assembly and transferred [22],…”

Section: Introductionmentioning

confidence: 99%

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Superhydrophobic Candle Soot Coating Directly Deposited on Aluminum Substrate with Enhanced Robustness

2022

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In this study, superhydrophobic surfaces were developed by using a simple and environmentally friendly technique. The nano-network of candle soot (CS) as the byproduct of incomplete combustion of paraffin candle was directly coated onto both smooth and micro-rough aluminum (Al) substrates for various time periods of deposition. The simple technique of mechanical sanding was used to impart micro-rough structures onto Al substrates using different sandpaper grit sizes. The scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), atomic force microscopy (AFM), and X-ray diffraction (XRD) techniques were used to characterize the morphology and chemistry of the prepared surfaces. Wetting analysis of the prepared surfaces was performed by measuring both water droplet contact angle (CA) and sliding angle (SA). The prepared coatings showed superhydrophobic properties with high CAs and low SAs for CS surfaces coated on roughened Al substrates. Moreover, the robustness of the prepared surfaces was tested by continuous impingement of water droplets onto their surfaces from various heights. Post-testing wetting analysis showed that the micro-nano surfaces of candle soot coated on micro roughened Al substrates demonstrated improved robustness. These surfaces could be useful for self-cleaning, anti-corrosion and anti-icing applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Superhydrophobic Candle Soot Coating Directly Deposited on Aluminum Substrate with Enhanced Robustness

2022

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“…The as-polished aluminum sheet was placed in a fume hood for the spraying process. The primer mixture was loaded in the sprayer and the distance between the sprayer nozzle and aluminum sheet was maintained at 10 cm [ 33 ]. The duration for spraying was 1 min and the sprayed sheet was dried at room temperature for over 6 h. The primer can enhance the binding strength, fullness, alkali resistance, and anti-corrosion, and ensure the homogeneous formation of an acrylic acid coating.…”

Section: Methodsmentioning

confidence: 99%

Preparation of ZnO Nanoparticle/Acrylic Resin Superhydrophobic Coating via Blending Method and Its Wear Resistance and Antibacterial Properties

Wang

et al. 2021

Materials

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Herein, a facile method for the preparation of an acrylic resin-based superhydrophobic coating is provided. Firstly, ZnO nanoparticles were modified with silane to obtain hydrophobic ZnO, which was then homogeneously blended with acrylic resin. Subsequently, the mixture was sprayed on an aluminum sheet to form a cured coating. The surface composition and morphology of the coating were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The hydrophobicity, wear resistance, and antibacterial properties of the prepared samples were tested. The optimized hydrophobicity was achieved with 10 wt% modification agent and resin-to-ZnO mass ratio of 1:4, exhibiting contact and sliding angles of 168.11° and 7.2°, respectively. Wear resistance was insufficient with a low resin content, while it grew with the increase in the resin content. However, when the resin content was excessively high, the hydrophobicity was reduced because the resin could wrap the modified ZnO nanoparticles and decrease the number of hydrophobic groups on the surface. Compared with the pure acrylic resin coating, the ZnO nanoparticle/acrylic resin superhydrophobic coating demonstrated a significant enhancement in the antibacterial properties.

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“…FS, synthesized by functionalizing silica nanomaterials with fluorine‐precursors is a highly performing water‐repellent nanomaterial offering water contact angles above 150° and static water contact angles of 0° (Figure S2 , Supporting Information). [ 16 , 18 ] Hence the IPN‐FS water repellent coating of ours features a micro–nano textured hierarchical roughness with lotus leaf‐like characteristics that maintain superhydrophobic properties up to 100 cycles of abrasion under load. Our water repellent coating structure can provide 99.94% and 99.85% initial reduction in both Gram‐positive and Gram‐negative bacteria when submerged in a contaminated liquid.…”

Section: Introductionmentioning

confidence: 99%

Shielding Surfaces from Viruses and Bacteria with a Multiscale Coating

et al. 2022

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The spread of viral and bacterial pathogens mediated by contact with surfaces is a leading cause of infection worldwide. COVID‐19 and the continuous rise of deaths associated with antibiotic‐resistant bacteria highlight the need to impede surface‐mediated transmission. A sprayable coating with an intrinsic ability to resist the uptake of bacteria and viruses from surfaces and droplets, such as those generated by sneezing or coughing, is reported. The coating also provides an effective microbicidal functionality against bacteria, providing a dual barrier against pathogen uptake and transmission. This antimicrobial functionality is fully preserved following scratching and other induced damage to its surface or 9 days of submersion in a highly concentrated suspension of bacteria. The coatings also register an 11‐fold decrease in viral contamination compared to the noncoated surfaces.

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Spray fabrication of superhydrophobic coating on aluminum alloy for corrosion mitigation

Cited by 28 publications

References 35 publications

Superhydrophobic Candle Soot Coating Directly Deposited on Aluminum Substrate with Enhanced Robustness

Superhydrophobic Candle Soot Coating Directly Deposited on Aluminum Substrate with Enhanced Robustness

Preparation of ZnO Nanoparticle/Acrylic Resin Superhydrophobic Coating via Blending Method and Its Wear Resistance and Antibacterial Properties

Shielding Surfaces from Viruses and Bacteria with a Multiscale Coating

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