Fabrication of a superhydrophobic mesh via magnetically aided electrode electric discharge machining

Xiao, Yingjie; Zhang, Y.J.; Liang, Zhiwen; Yue, Tai Man; Guo, Zhongning; Liu, J.W.; Chen, X.L.

doi:10.1016/j.colsurfa.2020.125963

Cited by 8 publications

(5 citation statements)

References 20 publications

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“…So, another reason why the surface of the aged brass could maintain superhydrophobicity might be that the dissolution rate of Cu 2 O was slower than the formation rate due to the low HCl concentration. This observation is basically consistent with the results reported in the previous literature [ 66 , 67 ]. Above all, the aged brass shows the potential practical application for oily sewage separation under harsh conditions.…”

Section: Resultssupporting

confidence: 94%

Fabrication of Superhydrophobic Porous Brass by Chemical Dealloying for Efficient Emulsion Separation

Zhou,

Ye,

Han

et al. 2023

Molecules

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By taking advantage of typical dealloying and subsequent aging methods, a novel homogeneous porous brass with a micro/nano hierarchical structure was prepared without any chemical modification. The treatment of commercial brass with hot concentrated HCl solution caused preferential etching of Zn from Cu62Zn38 alloy foil, leaving a microporous skeleton with an average tortuous channel size of 1.6 μm for liquid transfer. After storage in the atmosphere for 7 days, the wettability of the dealloyed brass changed from superhydrophilic to superhydrophobic with a contact angle > 156° and sliding angle < 7°. The aging treatment enhanced the hydrophobicity of the brass by the formation of Cu2O on the surface. By virtue of the opposite wettability to water and oil, the aged brass separated surfactant-stabilized water-in-oil emulsions with separation efficiency of over 99.4% and permeate flux of about 851 L·m−2·h−1 even after recycling for 60 times. After 10 times of tape peeling or sandpaper abrasion, the aged brass maintained its superhydrophobicity, indicating its excellent mechanical stability. Moreover, the aged brass still retained its superhydrophobicity after exposure to high temperatures or corrosive solutions, displaying high resistance to extreme environments. The reason may be that the bicontinuous porous structure throughout the whole foil endows stable mechanical properties to tolerate extreme environments. This method should have a promising future in expanding the applications of alloys.

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Section: Resultssupporting

confidence: 94%

Fabrication of Superhydrophobic Porous Brass by Chemical Dealloying for Efficient Emulsion Separation

Zhou,

Ye,

Han

et al. 2023

Molecules

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“…Owing to the groove design, the wear resistance in the direction parallel to the groove is better. The analysis and experiments demonstrate that a simple, fast, and surface-adaptive method for the preparation of wear-resistant superhydrophobic surfaces has been achieved on stainless steel, providing a reference for the manufacture of superhydrophobic surfaces on other substrates. − …”

Section: Discussionmentioning

confidence: 94%

“…Thus, the CA of the acute-angled shallow groove sample was the largest, which was consistent with the experimental results. Recent studies on the mechanical robustness of EDM for manufacturing superhydrophobic surfaces are shown in Table S1. ,− …”

Section: Resultsmentioning

confidence: 99%

One-Step Preparation of a Superhydrophobic Surface by Electric Discharge Machining with a Carbon Fiber Brush Electrode

et al. 2022

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Superhydrophobic surfaces are extremely susceptible to damage, which can lead to a sharp decrease in their service life and physical properties. Therefore, developing methods to impart superhydrophobic surfaces with excellent wear resistance is crucial. In this article, a flexible carbon fiber brush was utilized as an electrode to fabricate micro-/nano-structures on a grooved surface via electric discharge machining in one step, resulting in a superhydrophobic coating with excellent wear resistance. Carbon fiber brushes exhibit several notable properties, including excellent flexibility, conductivity, and high temperature resistance. Carbon fiber brushes can adapt to the complex inner walls of grooves. Many nano-structures were fabricated on the grooves via pulse discharge, which resulted in a superhydrophobic surface with excellent wear resistance. The contact angle (CA) and sliding angle of the surface after discharge were 156.3 and 2°, respectively. The processed surface exhibits superior corrosion resistance compared to the stainless-steel substrate. The influence of the micro-groove shapes on wear resistance was tested. The results showed that, after 500 cm of wear, the shallow grooves retained their superhydrophobicity with a CA of 150.1°.

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“…Compared with the flat hydrophobic copper, the CHT coefficient was increased by 82.9%. Based on magnetically aided electrode EDM (MAE-EDM), Xiao et al [ 27 ] fabricated a superhydrophobic mesh. The experimental results showed that the processed textured mesh had good contact angle stability, corrosion resistance, and mechanical stability.…”

Section: Electrical Discharge Machiningmentioning

confidence: 99%

Progress in Non-Traditional Processing for Fabricating Superhydrophobic Surfaces

Shen¹,

Ming

Ren

et al. 2021

Micromachines

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When the water droplets are on some superhydrophobic surfaces, the surface only needs to be inclined at a very small angle to make the water droplets roll off. Hence, building a superhydrophobic surface on the material substrate, especially the metal substrate, can effectively alleviate the problems of its inability to resist corrosion and easy icing during use, and it can also give it special functions such as self-cleaning, lubrication, and drag reduction. Therefore, this study reviews and summarizes the development trends in the fabrication of superhydrophobic surface materials by non-traditional processing techniques. First, the principle of the superhydrophobic surfaces fabricated by laser beam machining (LBM) is introduced, and the machining performances of the LBM process, such as femtosecond laser, picosecond laser, and nanosecond laser, for fabricating the surfaces are compared and summarized. Second, the principle and the machining performances of the electrical discharge machining (EDM), for fabricating the superhydrophobic surfaces, are reviewed and compared, respectively. Third, the machining performances to fabricate the superhydrophobic surfaces by the electrochemical machining (ECM), including electrochemical oxidation process and electrochemical reduction process, are reviewed and grouped by materials fabricated. Lastly, other non-traditional machining processes for fabricating superhydrophobic surfaces, such as ultrasonic machining (USM), water jet machining (WJM), and plasma spraying machining (PSM), are compared and summarized. Moreover, the advantage and disadvantage of the above mentioned non-traditional machining processes are discussed. Thereafter, the prospect of non-traditional machining for fabricating the desired superhydrophobic surfaces is proposed.

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Fabrication of a superhydrophobic mesh via magnetically aided electrode electric discharge machining

Cited by 8 publications

References 20 publications

Fabrication of Superhydrophobic Porous Brass by Chemical Dealloying for Efficient Emulsion Separation

Fabrication of Superhydrophobic Porous Brass by Chemical Dealloying for Efficient Emulsion Separation

One-Step Preparation of a Superhydrophobic Surface by Electric Discharge Machining with a Carbon Fiber Brush Electrode

Progress in Non-Traditional Processing for Fabricating Superhydrophobic Surfaces

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