Slip length measurement of pdms/hydrophobic silica superhydrophobic coating for drag reduction application

Saadatbakhsh, Mohammad; Asl, Shahin Jamali; Kiani, Mohammad Javad; Nouri, Mahtab

doi:10.1016/j.surfcoat.2020.126428

Cited by 50 publications

(17 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Through the measurements of surface morphology and surface wettability, it is concluded that the pristine copper was prone to be corroded in alkaline solution, while the super-hydrophobic FAS coating can effectively protect the copper material from corrosion. Besides, the fluorinated super-hydrophobic coating can (6) Z CPE = Y −1 0 (iw) −n , maintain excellent stability in alkaline solution. Based on the measurements of surface chemical compositions, the stability mechanism of super-hydrophobicity was proposed and further validated by the electrochemical tests (PDP and EIS).…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

“…Functional surfaces with super-hydrophobic property have aroused great attention from academic to industrial because of their broad ranges of applications, including self-cleaning [1], anti-icing [2], oil-separation [3], anti-bacteria [4], fluid drag reduction [5], and even energy storage devices [6]. The inspiration for artificial super-hydrophobic surfaces is derived from natural organisms, such as lotus leaves [7] and desert beetle [8].…”

Section: Introductionmentioning

confidence: 99%

“…Fig 6. The schematic illustration of further hydrolysis reaction for the super-hydrophobic FAS surface when immersed into alkaline solution…”

mentioning

confidence: 99%

See 2 more Smart Citations

Stability Mechanism of Laser-induced Fluorinated Super-hydrophobic Coating in Alkaline Solution

Tian

Yang

2021

J Bionic Eng

View full text Add to dashboard Cite

Great attention has been focused on super-hydrophobic surfaces due to their fantastic applications. Fluoride chemicals are widely used to fabricate super-hydrophobic surfaces due to their convenience, simplicity, and high efficiency. Previous research has made extensively efforts on corrosion resistance of fluorinated super-hydrophobic surfaces in corrosive media. Nevertheless, rare papers focused on the underlying reasons of anticorrosion property and stability mechanism on the fluorinated super-hydrophobic coatings in alkaline solution. Therefore, this work aims to reveal these mechanisms of fluorinated super-hydrophobic copper samples in strong alkaline solution (pH 13). Through the characterization of surface wettability and surface morphology, the laser-induced super-hydrophobic surface retained excellent stability after soaking in alkaline solution for 4 h. Through measurement of chemical compositions, the anticorrosion mechanism and stability mechanism of the fluorinated super-hydrophobic surface were proposed. Importantly, the hydroxyl ion (OH−) can further promote the hydrolysis reaction to improve the density and bonding strength of the fluoride molecules. Finally, the electrochemical experiments (PDP and EIS tests) were conducted to validate the rationality of our proposed conclusions.

show abstract

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stability Mechanism of Laser-induced Fluorinated Super-hydrophobic Coating in Alkaline Solution

Tian

Yang

2021

J Bionic Eng

View full text Add to dashboard Cite

show abstract

“…The microstructure of a superhydrophobic nanocoating includes a large number of irregular arrangements of pores with diameter of 10–50 μm and quasi‐spherical particles with average diameter of 5–10 μm. [ 82 ] Superhydrophobic surfaces with random roughness were formed by spraying 1 H ,1 H ,2 H ,2 H ‐tridecafluorooctyl polyhedral oligomeric silsesquioxane materials on aluminum substrates with different textured surfaces. The maximum drag reduction rate of 26.1% was measured through the Taylor Couette apparatus at Reynolds numbers between 1.6 × 10 4 and 8.9 × 10 4 .…”

Section: Drag Reduction Microstructuresmentioning

confidence: 99%

Focus on Bioinspired Textured Surfaces toward Fluid Drag Reduction: Recent Progresses and Challenges

et al. 2021

View full text Add to dashboard Cite

After a long period of biological evolution, natural creatures will inevitably evolve body surfaces suitable for the living environment. The functions of natural biological surfaces are abundant and powerful, including antiadhesion, self‐cleaning, drag reduction, anti‐icing, wear resistance, and other characteristics. In the context of coping with the energy crisis, inspired by natural biological surface microstructures, researchers explore biomimetic surface microstructures that reduce fluid drag and investigate the mechanisms of drag reduction. Herein, mainly the current state of research on biomimetic textured surfaces that can be applied to fluid drag reduction is reviewed and the microstructures’ morphology, drag reduction mechanisms, and the fabrication techniques of textured surfaces are discussed in detail. In particular, the experimental methods for measuring the drag reduction effect of textured surfaces are introduced, which is extremely rare. The article concludes with a summary of existing problems and future directions in the research of biomimetic surface drag reduction technology. This Review can provide a reference for practical application and laboratory research of drag reduction in marine transportation, military weapons, aviation, and pipeline systems.

show abstract

“…Many studies have been carried out to fabricate superhydrophobic surfaces. Polydimethylsiloxane/silica nanocomposite coatings were fabricated by a spray deposition method and showed superhydrophobic property with the hierarchical structures [ 19 ]. 1H,1H,2H,2H-perfluorodecyltrichlorosilane-functionalized silica based coating on printed circuit board showed good superhydrophobicity [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Sustainable, Highly Efficient and Superhydrophobic Fluorinated Silica Functionalized Chitosan Aerogel for Gravity-Driven Oil/Water Separation

Zhu

Jiang

Liu

et al. 2021

Gels

View full text Add to dashboard Cite

A superhydrophobic fluorinated silica functionalized chitosan (F-CS) aerogel is constructed and fabricated by a simple and sustainable method in this study in order to achieve highly efficient gravity-driven oil/water separation performance. The fluorinated silica functionalization invests the pristine hydrophilic chitosan (CS) aerogel with promising superhydrophobicity with a water contact angle of 151.9°. This novel F-CS aerogel possesses three-dimensional structure with high porosity as well as good chemical stability and mechanical compression property. Moreover, it also shows striking self-cleaning performance and great oil adsorption capacity. Most importantly, the as-prepared aerogels exhibits fast and efficient separation of oil/water mixture by the gravity driven process with high separation efficiency. These great performances render the prepared F-CS aerogel a good candidate for oil/water separation in practical industrial application.

show abstract

Slip length measurement of pdms/hydrophobic silica superhydrophobic coating for drag reduction application

Cited by 50 publications

References 49 publications

Stability Mechanism of Laser-induced Fluorinated Super-hydrophobic Coating in Alkaline Solution

Stability Mechanism of Laser-induced Fluorinated Super-hydrophobic Coating in Alkaline Solution

Focus on Bioinspired Textured Surfaces toward Fluid Drag Reduction: Recent Progresses and Challenges

Sustainable, Highly Efficient and Superhydrophobic Fluorinated Silica Functionalized Chitosan Aerogel for Gravity-Driven Oil/Water Separation

Contact Info

Product

Resources

About