Fabrication of water-repellent double-layered polydopamine/copper films on mesh with improved abrasion and corrosion resistance by solution-phase reduction for oily wastewater treatment

Wang, Jintao; Liu, Shu-Yu

doi:10.1016/j.seppur.2019.116005

Cited by 37 publications

(14 citation statements)

References 34 publications

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“…Compared with other reports in the literature, the PCL/SiO 2 -a0.5 membrane had remarkable advantages with regard to separation efficiency and permeation flux (see Table ). ,− …”

Section: Resultsmentioning

confidence: 99%

Extraordinary Superhydrophobic Polycaprolactone-Based Composite Membrane with an Alternated Micro–Nano Hierarchical Structure as an Eco-friendly Oil/Water Separator

Chen

et al. 2021

ACS Appl. Mater. Interfaces

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Extraordinary superhydrophobic polycaprolactone (PCL) composite membranes with an alternated hierarchical micro−nano structure were designed by addition of SiO 2 aerogel. The highest water contact angle (WCA) of 166.8 ± 1.5°was obtained when SiO 2 aerogel content was 0.5% (PCL/SiO 2 -a0.5) in the PCL composite membrane, which was higher than other reported polymer-based membranes. SiO 2 aerogel lowered PCL composite membrane's surface energy. The triple curvature structure composed of microspheres, nanospheres, and nanofibers produced on PCL/SiO 2 -a0.5 membranes endowed the excellent roughness of the surface. Also, the inner structure of the PCL/ SiO 2 -a0.5 composite membrane composed of micro−nano spheres, nanofibers, and microfibers increased the porosity of the separation membrane, which would provide more adsorption space. The PCL/SiO 2 -a0.5 composite membrane as a separator for surfactant-stabilized emulsions of water-in-oil showed ultrahigh separation flux and efficiency. Meanwhile, the PCL/SiO 2 -a0.5 composite membrane had an outstanding chemical resistance, self-cleaning ability, and good reusability. The composite membranes reported in this work as eco-friendly separation materials possessed all these characters in oil/water separation. This research proposed a very simple method to design eco-friendly high-efficiency separators through the construction of the alternated micro− nano hierarchical structure.

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“…Compared with other reports in the literature, the PCL/SiO 2 -a0.5 membrane had remarkable advantages with regard to separation efficiency and permeation flux (see Table ). ,− …”

Section: Resultsmentioning

confidence: 99%

Extraordinary Superhydrophobic Polycaprolactone-Based Composite Membrane with an Alternated Micro–Nano Hierarchical Structure as an Eco-friendly Oil/Water Separator

Chen

et al. 2021

ACS Appl. Mater. Interfaces

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“…The separation efficiency of the modified PM remained approximately 98% after 50 oil-water separation cycles, which proves that the mesh membrane is stable. 19 The structure of polydopamine (PDA), which contains several catechol groups, is similar to that of the adhesion proteins secreted by mussels; therefore, PDA can strongly adhere to these adhesion proteins. This property can be exploited for the adsorption of PDA onto various materials, such as inorganic particles and organic fibers.…”

Section: Introductionmentioning

confidence: 99%

“…The separation efficiency of the modified PM remained approximately 98% after 50 oil–water separation cycles, which proves that the mesh membrane is stable. 19…”

Section: Introductionmentioning

confidence: 99%

Ionic liquid-modified polyimide membranes with in-situ-grown polydopamine for separation of oil–water emulsions

Peng

Jia

Wang³

et al. 2022

High Performance Polymers

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Leakage of oily industrial waste is not only a serious environmental and ecological hazard but also poses a significant health risk to people. Membrane separation, which is cost-effective and efficient, is one of the best solutions for reducing pollution discharge through oil–water separation. In this study, polydopamine (PDA) was incorporated into electrostatically spun ionic liquid-capped polyimide (IL-PI) membranes through an in situ growth method; the membranes exhibited the strong adsorption properties of PDA. The polyimide fibers were hydrophilically modified with an IL, which contains several hydrophilic groups, and PDA. Adjusting the polymerization time resulted in the formation of a composite membrane, which could effectively separate oil–water emulsions. Scanning electron microscopy analysis showed that with an increase in the PDA coating time, the PDA content in and on the surface of the composite membrane fibers significantly increased. In addition, the surface contact angle of the membrane decreased from 72.87° to 12.06° with the addition of the PDA coating, while the wettability was significantly improved. The PDA-modified fibrous membranes showed good separation of the emulsified oil–water mixtures. The maximum membrane flux and separation efficiency achieved was 280 L·m−2·h−1 and >99%, respectively. After 10 repeated cycles, the separation efficiency was maintained at >92%. This approach can be used for the design of future wastewater treatment solutions.

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“…Specifically, the excellent water‐repellence of superhydrophobic surface significantly reduced the probability and duration of liquid residence, and the air cushion trapped in rough structures effectively decreased the touch proportion between the solid interface and corrosive liquids, which enabled surface super‐hydrophobization to be a profound means to improve the anti‐corrosion of various materials including CM 18–22 . For example, Wang et al prepared water‐repellent copper films on mesh by fabricating stable micro/nano‐structure with situ growth approach combined with the modification of dodecanethiol, which was able to resist various organic solvents, and corrosive solutions 23 . Cheng et al described a approach for preparing superhydrophobic interface which depended on surface treatment with a xylene‐ethanol solution of high density polyethylene by drop‐casting, revealing wonderful anti‐corrosion peculiarity as compared with the pristine CM 24 .…”

Section: Introductionmentioning

confidence: 99%

“…which was able to resist various organic solvents, and corrosive solutions. 23 Cheng et al described a approach for preparing superhydrophobic interface which depended on surface treatment with a xylene-ethanol solution of high density polyethylene by drop-casting, revealing wonderful anti-corrosion peculiarity as compared with the pristine CM. 24 By dynamic pulsed laser ablation directly, Zhou et al created microgrooves on CM which can separate all kinds of caustic liquid, including acidic, alkaline and salt solutions.…”

mentioning

confidence: 99%

Anti‐corrosion property of superhydrophobic copper mesh with one‐step self‐assembled perfluorothiolate monolayers

Feng

Chen

Chao

et al. 2022

Surface & Interface Analysis

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Copper mesh (CM) is one of the most commonly used engineering materials due to its remarkable mechanical and electromagnetic properties. However, CMs are generally susceptible to chemical corrosion in harsh environments, which greatly limits their long-term usage. In this paper, we come up with a one-step perfluorodecanethiol self-assembly means to manufacture superhydrophobic CM with significantly improved anti-corrosion property. The self-assembly reaction between copper and 1H,1H,2H,2H-perfluorodecanethiol created nanoscale rough structures and lowered the surface energy of the CM surface, which was account for the excellent repellence towards various aqueous solutions. The electrochemical tests demonstrated that, compared with original CM, the i corr value of the self-assembled monolayers (SAMs)functionalized CM decreases about one order of magnitude, whereas the corrosion protection efficiency of the treated CM in NaCl, NaOH, and HCl aqueous solutions were all obviously increased. Therefore, the proposed simple method could be an alternative candidate for the creation of functional CM with anti-corrosion properties that could be used under complex conditions.

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Fabrication of water-repellent double-layered polydopamine/copper films on mesh with improved abrasion and corrosion resistance by solution-phase reduction for oily wastewater treatment

Cited by 37 publications

References 34 publications

Extraordinary Superhydrophobic Polycaprolactone-Based Composite Membrane with an Alternated Micro–Nano Hierarchical Structure as an Eco-friendly Oil/Water Separator

Extraordinary Superhydrophobic Polycaprolactone-Based Composite Membrane with an Alternated Micro–Nano Hierarchical Structure as an Eco-friendly Oil/Water Separator

Ionic liquid-modified polyimide membranes with in-situ-grown polydopamine for separation of oil–water emulsions

Anti‐corrosion property of superhydrophobic copper mesh with one‐step self‐assembled perfluorothiolate monolayers

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