Mechanically durable underwater superoleophobic surfaces based on hydrophilic bulk metals for oil/water separation

Yu, Huadong; Lian, Zhongxu; Xu, Jinkai; Wan, Yanling; Wang, Zuobin; Li, Yiquan; Yu, Zhanjiang; Weng, Zhankun

doi:10.1016/j.apsusc.2017.08.120

Cited by 27 publications

(10 citation statements)

References 43 publications

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“…As shown in Table 3, the wall shear stresses may represent the difficulty of the droplets moving on the surface. Several studies on the hydrophobic effects of a variety of liquids have drawn similar conclusions [56, 57].…”

Section: Resultsmentioning

confidence: 61%

Preparation of a biomimetic superomniphobic hierarchical structure and analysis of droplet wettability

Feng

Guo

et al. 2022

Biosurface and Biotribology

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In this study, a bioinspired hierarchical structure was formed with superomniphobicity on a 7075 aluminium alloy using laser ablation. The morphology and wetting characteristics of the biomimetic sample surface were characterised using scanning electron microscopy, laser confocal microscopy, and contact angle measurements. The effect of the liquid properties and surface structures on the rolling behaviour was investigated. The results suggest that the fabricated biomimetic sample surface was a hierarchical structure. The prepared sample had superomniphobicity and low adhesion properties, and the contact angles of six different liquid droplets on the sample surface reached or approached 150°. Specifically, the largest contact angle was 152°, and the average rolling angle was 7.7°. This multi‐hydrophobic surface provides a valuable reference for the research study and use of a variety of solid–liquid contacts.

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Section: Resultsmentioning

confidence: 61%

Preparation of a biomimetic superomniphobic hierarchical structure and analysis of droplet wettability

Feng

Guo

et al. 2022

Biosurface and Biotribology

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“…1000) under a 100 g weight and an external force was applied to move 10 cm away from the initial position and return back. This process was repeated 100 times [ 39 ].…”

Section: Methodsmentioning

confidence: 99%

Synthesis of Si-Based High-Efficiency and High-Durability Superhydrophilic-Underwater Superoleophobic Membrane of Oil–Water Separation

Fang

Chen

et al. 2021

Materials

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Oil pollution is caused by the frequent discharge of contaminated industrial wastewater and accidental oil spills and is a severe environmental and health concern. Therefore, efficient materials and processes for effective oil–water separation are being developed. Herein, SiO2-Na2SiO3-coated stainless steel fibers (SSF) with underwater superoleophobic and low-adhesion properties were successfully prepared via a one-step hydrothermal process. The modified surfaces were characterized with scanning electron microscopy (SEM), and contact angle measurements to observe the surface morphology, confirm the successful incorporation of SiO2, and evaluate the wettability, as well as with X-ray diffraction (XRD). The results revealed that SiO2 nanoparticles were successfully grown on the stainless-steel fiber surface through the facile hydrothermal synthesis, and the formation of sodium silicate was detected with XRD. The SiO2-Na2SiO3-coated SSF surface exhibited superior underwater superoleophobic properties (153–162°), super-hydrophilicity and high separation efficiency for dichloromethane–water, n-hexane–water, tetrachloromethane–water, paroline–water, and hexadecane–water mixtures. In addition, the as-prepared SiO2-Na2SiO3-coated SSF demonstrated superior wear resistance, long-term stability, and re-usability. We suggest that the improved durability may be due to the presence of sodium silicate that enhanced the membrane strength. The SiO2-Na2SiO3-coated SSF also exhibited desirable corrosion resistance in salty and acidic environments; however, further optimization is needed for their use in basic media. The current study presents a novel approach to fabricate high-performance oil–water separation membranes.

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“…After 40 separation cycles and the application of corrosive medium, the surface still had high separation efficiency. Our group [262] reported a simple method for commercially fabricating mechanically durable surfaces with underwater superoleophobic behavior via the nanosecond laser on common engineering metals. The unique features including underwater oil-repellent property, possibility of commercial fabrication and mechanical durability indicated potential utilization of the laser-ablated stainless steel wire mesh to remove oil from water.…”

Section: Underwater Superoleophobic Metallic Surfacesmentioning

confidence: 99%

Biomimetic Superlyophobic Metallic Surfaces: Focusing on Their Fabrication and Applications

Lian

Wang

et al. 2020

J Bionic Eng

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Metals are indispensable engineered materials for day-to-day life. Researches focused on metallic surfaces with superlyophobicity (superhydrophobicity, superoleophobicity, underwater superoleophobicity and slippery characteristic) have attracted much attention recently. Nature is a magician that gives each organic life a unique advantage. Researchers have created a large number of biomimetic superlyophobic metallic surfaces through various approaches. These biomimetic superlyophobic metallic surfaces exhibit advantages in many applications, such as self-cleaning, corrosion resistance, anti-icing, and drag reduction. In this review, the specific fabrication and applications of biomimetic superlyophobic metallic surfaces were reported. The remaining challenges and future outlook of biomimetic superlyophobic metallic surfaces were preliminarily analyzed. It is hoped that the review will be essential for broadening the scope of potential applications of metals and providing a powerful reference for future research on metal-based advanced functional materials.

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Mechanically durable underwater superoleophobic surfaces based on hydrophilic bulk metals for oil/water separation

Cited by 27 publications

References 43 publications

Preparation of a biomimetic superomniphobic hierarchical structure and analysis of droplet wettability

Preparation of a biomimetic superomniphobic hierarchical structure and analysis of droplet wettability

Synthesis of Si-Based High-Efficiency and High-Durability Superhydrophilic-Underwater Superoleophobic Membrane of Oil–Water Separation

Biomimetic Superlyophobic Metallic Surfaces: Focusing on Their Fabrication and Applications

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