Continuous, High-Speed, and Efficient Oil/Water Separation using Meshes with Antagonistic Wetting Properties

Dunderdale, Gary J.; Urata, Chihiro; Sato, Toshiki; England, Matt W.; Hozumi, Atsushi

doi:10.1021/acsami.5b06207

Cited by 108 publications

(59 citation statements)

References 28 publications

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“…78 Hozumi and coworkers reported a oil/water separation device allowing to run continuously, and separate large volumes of oily water at high flow rates of about 5 L s 21 m 22 . 80 These results verify that the block copolymer-coated SSMs developed in this work have promising application in water/oil separation.…”

Section: Application Of the Coated Ssms To Water/oil Separationsupporting

confidence: 80%

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Toward efficient water/oil separation material: Effect of copolymer composition on pH‐responsive wettability and separation performance

Zhou

Luo

2016

AIChE Journal

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Interest in functional soft matter with stimuli-responsive wettability has increasingly intensified in recent years. From the chemical product engineering viewpoint, this study aims to fabricate reversible pH-responsive polymeric surfaces with controllable wettability using [poly(2,2,3,4,4,4-hexafluorobutyl methacrylate)-block-poly(acrylic acid) (PHFBMAb-PAA)] block copolymers. To attain this aim, three block copolymers with different PAA segment lengths were synthesized for the first time through Cu(0)-mediated reversible-deactivation radical polymerization and hydrolysis reaction. pH-induced controllable wettability was achieved by spin-coating the resulting block copolymers onto silicon wafers. Results showed that the pH-responsive wetting behavior was introduced by incorporating the PAA block, and that the responsiveness of as-fabricated surfaces was greatly influenced by PAA content. All three evolutions of water contact angle with pH shared a similar inflection point at pH 5.25. Furthermore, on the basis of the wetting properties and mechanism understanding, the application of copolymer coated meshes in layered water/oil separation was exploited. Given their superhydrophilicity and underwater superoleophobicity, PHFBMA 70 -b-PAA 148 and PHFBMA 70 -b-PAA 211 coated stainless steel meshes (SSMs) can efficiently separate water from different mixtures of organic solvent and water with high flux. However, considering long-term use, the PHFBMA 70 -b-PAA 148 coated SSM with good stability may be the best copolymer for water/oil separation. Therefore, a coordination of structure, composition, and functionality was necessary to enable practical applications of the functional materials.

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Section: Application Of the Coated Ssms To Water/oil Separationsupporting

confidence: 80%

“…[66][67][68][69][70][71][72][75][76][77][78][79][80] Moreover, gravity-driven separations of water (pH 7) from n-heptane/ water, n-octane/water, petroleum ether (60-90 8C)/water, and diethyl ether/water mixtures were also investigated. Rapid separation processes were achieved for all cases.…”

Section: Application Of the Coated Ssms To Water/oil Separationmentioning

confidence: 99%

Toward efficient water/oil separation material: Effect of copolymer composition on pH‐responsive wettability and separation performance

Zhou

Luo

2016

AIChE Journal

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“…In this regards, metal oxide, inorganic clay, magnetic materials, polymer microfiber bundles, polymer-based superhydrophobic materials, and sponge-like aerogels have been explored for oil-water separation because of its high surface area, coupled with excellent mechanochemical stability, and hydrophobicity [4,[9][10][11][12][13]. In addition, metal meshes have also been reported explored for oil-water separation but have limitations of low separation efficiency and poor cyclability [14,15]. However, the high cost of the chemicals required for the synthesis of above materials and associated environmental and ecological concerns restrict their widespread use [16,17].…”

Section: Introductionmentioning

confidence: 99%

Reduced graphene oxide-coated cotton as an efficient absorbent in oil-water separation

Dashairya

Rout

Saha

2017

Adv Compos Hybrid Mater

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The present work describes the fabrication of superhydrophobic and superoleophilic reduced graphene oxide-coated cotton (rGO@cotton) by a facile one-step hydrothermal used method for oil-water separation. Results from X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FESEM) analysis show the formation of a composite structure with the presence of an ultrathin coating of rGO on the cotton fibers. The contact angle (CA) between a static water droplet and the rGO@cotton surface in air was measured~162.9°, which suggests the formation of a superhydrophobic surface on the synthesized product. Moreover, the rGO@cotton showed excellent absorption capacity for oils where 1 g of rGO@cotton was able to remove~30-40 g of various oils in the first cycle from oil-water mixtures. The flexible rGO@cotton was reusable and demonstrated oil retention up to~35-50% at the tenth cycle using simple sorption-mechanical squeezing test. Overall, the present work identifies that the rGO@cotton is an efficient absorbent for effective separation of oil from oil-water mixtures.

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“…TiO 2 films have been improved through the application of Ni 2+ and Fe 3+ to produce self-cleaning active materials in buildings (George et al, 2014;Yong et al, 2014;. Antimicrobial activity of TiO 2 has a huge potential in the construction of building materials for both indoor and outdoor applications Li et al, 2015b;Dunderdale et al, 2015). Antimicrobial activity of TiO 2 is very critical due to their applications in food industries and medical science to preserve food and drug from contamination by microbes.…”

Section: Commercial Applicationsmentioning

confidence: 99%

Recent Progress in Self-Cleaning Materials with Different Suitable Applications

Chermahini¹,

Ostad‐Ali‐Askari²,

Eslamian³

et al. 2018

American Journal of Engineering and Applied Sciences

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Self-cleaning properties have received significant attention for the importance of their potential. Coatings at Nano-scales offer possibilities of using materials for self-cleaning surfaces. Recent efforts have begun to focus on the kinds of materials including metals, semiconductors and polymers. Such materials can have enormous potential in only a few applications. Moreover, the production of these materials requires high costs with low photo activity. In this regard, TiO 2 and its derived materials have shown acceptable and effective suggestions for this application. Moreover, the mechanism of self-cleaning has been explained by the effect of hydrophilic and hydrophobic. Hydrophilic and hydrophobic can have many applications in different areas like water purification, microfluidics and photovoltaic. In this review, the application of self-cleaning in solar cells and environment as well as TiO 2 derived materials and their applications in water management have been briefly illustrated. In addition, it has been explained that a huge number of self-cleaning materials, applications and improvement in utilities have been essential. In short, we have conducted a comprehensive review of the new approach and to mention numerous materials with hydrophobic and hydrophilic properties would be promising for most environmental concerns. Bio-inspired surface respond in nature through hydrophobic (Cicada Wing, Butterfly Wing, Lotus Leaf, Rice Leaf) and hydrophilic (Fish Scale, Snail Shell, Shark Skin) properties was divided in 4 and 3 respectively. Anti reflective coatings with self-cleaning properties have drowned considerable attention for both their basic appearances and vast applied usages. Antireflective coatings with self-cleaning properties have been considered because of their fascinating features and vast diversity of empirical uses.

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Continuous, High-Speed, and Efficient Oil/Water Separation using Meshes with Antagonistic Wetting Properties

Cited by 108 publications

References 28 publications

Toward efficient water/oil separation material: Effect of copolymer composition on pH‐responsive wettability and separation performance

Toward efficient water/oil separation material: Effect of copolymer composition on pH‐responsive wettability and separation performance

Reduced graphene oxide-coated cotton as an efficient absorbent in oil-water separation

Recent Progress in Self-Cleaning Materials with Different Suitable Applications

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