Tannin-inspired robust fabrication of superwettability membranes for highly efficient separation of oil-in-water emulsions and immiscible oil/water mixtures

Ong, Chun Lian; Shi, Yusuf; Chang, Junseok; Alduraiei, Fadhilah; Wehbe, Nimer; Ahmed, Zeyad; Wang, Peng

doi:10.1016/j.seppur.2019.05.099

Cited by 61 publications

(34 citation statements)

References 35 publications

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“…Moreover, Ong et al developed a fast and versatile coating strategy for hydrophobic PVDF membrane modification, which involves TA deposition followed by oxidation of NaIO 4 , as shown in Figure 14(b). 57 This strategy was inspired by the work of Song et al, in which TA-derived coating by in-situ oxidation of NaIO 4 was assembled on the PP separator to form high-performance lithium-ion batteries. 116 Theoretically, as can be seen from Figure 14(a), the pyrogalloy groups in TA can be oxidized into quinone groups by the strong oxidant and then the quinone groups can be degraded to yield carboxyl groups.…”

Section: Individual Coatings Based On Rapid Deposition Induced By Omentioning

confidence: 99%

“…[54][55][56] The aforementioned plant polyphenolinvolved coatings are formed under weak alkaline conditions. Of note, rapid and homogeneous deposition of individual plant polyphenol coatings can also be realized assisted by strong oxidants such as sodium periodate (NaIO 4 ) in slightly acid conditions, 57 as illustrated in Figure 3(c). Ever since the pioneering works were published, plant polyphenol involved coatings have been of great interests for surface engineering of a variety of substrates, including nanoparticles, 58 capsules, 59 gels, 60 and membranes.…”

Section: Introductionmentioning

confidence: 99%

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Recent advances in membrane hydrophilic modification with plant polyphenol‐inspired coatings for enhanced oily emulsion separation

Huang

Yin

Zhang

et al. 2021

J of Applied Polymer Sci

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Oily wastewater, especially the emulsified one, causes serious environment pollution and poses threats to the ecosystem and resource recycling. Among various filtration media, porous polymeric membranes have gained tremendous attention in dealing with oily emulsions due to their energy-saving, costeffective, and highly efficient features. However, to alleviate membrane fouling by oil droplets and ensure high separation efficiency, endowing membrane with superhydrophilicity and underwater superoleophobicity via facile strategy is highly desired. Taking advantages of the mild forming conditions, universality and cost-efficiency, more and more efforts have been devoted to membrane hydrophilic modification by plant polyphenol-inspired coatings in recent years. In this review, we focus on recent advances in constructing plant polyphenolinvolved coatings on membrane surface for oil-in-water emulsion separation. The interactions between plant polyphenol and functional materials including amino-functionalized materials, transition metal ions and oxidants via covalent chemistry, coordination chemistry, and rapid oxidation are highlighted. In addition, the impacts of the resultant coating on the wettability, oily emulsion separation performance, and anti-oil fouling performance of the modified membrane are systematically summarized. Finally, future outlooks in membrane surface engineering with plant polyphenol-involved coatings are discussed to further broaden the research related to high-efficiency oil/water separation based on membrane technology.

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Section: Individual Coatings Based On Rapid Deposition Induced By Omentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recent advances in membrane hydrophilic modification with plant polyphenol‐inspired coatings for enhanced oily emulsion separation

Huang

Yin

Zhang

et al. 2021

J of Applied Polymer Sci

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“…FT‐IR and XPS characterization were conducted to analyze the surface chemical composition of PVP/PAN membrane after 10 cycles. As shown in Figure 4, the PVP/PAN membrane after ten cycles also showed characteristic peaks at 1663 and 1289 cm −1 appear, corresponding to the CO (1663 cm −1 ) and CN (1289 cm −1 ) bonds that belong to PVP, 38–40 indicating that the PVP/PAN membrane after 10 cycles still retains PVP components.…”

Section: Resultsmentioning

confidence: 92%

“…FT-IR and XPS characterization were conducted to analyze the surface chemical composition of PVP/PAN membrane after 10 cycles. As shown in Figure 4, the PVP/PAN membrane after ten cycles also showed characteristic peaks at 1663 and 1289 cm −1 appear, corresponding to the C O (1663 cm −1 ) and C N (1289 cm −1 ) bonds that belong to PVP, [38][39][40] indicating that the PVP/PAN membrane after 10 cycles still retains PVP components. In order to further determine that the PVP component in the PVP/PAN membrane after 10 cycles still exists, next, the XPS and thermogravimetric (TG) of the initial PVP/PAN membrane and PVP/PAN membrane after 10 cycles were compared.…”

Section: Cycle Stabilitymentioning

confidence: 92%

An oil‐contamination‐resistant PVP/PAN electrospinning membrane for high‐efficient oil–water mixture and emulsion separation

Meng

Gao

et al. 2020

J of Applied Polymer Sci

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Oil-water separation is an urgent issue due to the frequently occurred oil leakages and increasing discharge of oily wastewater. The pollutional and wastewater can not only damage the environment, but endanger human health. Owing to the small particle size of the oil contamination, it is still a challenge for the separation of oil-water emulsion. In this study, we developed a facile strategy to prepare a hydrophilic polyvinylpyrrolidone/polyacrylonitrile (PVP/PAN) nanofibrous membrane for oil-water mixture and emulsion separation. The lowest water contact angle on the membrane surface can achieve 16.7 , thus the membranes can effectively resist the oil contamination on them. Moreover, the membrane can efficiently separate oil-water mixtures and emulsion by gravity. In addition, it can separate oil-water mixtures in harsh conditions (pH = 1 and 14). Membranes prepared in this work would hold a great potential in the practical use of water treatment and environmental industry.

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“…However, the inherent hydrophobic nature of PVDF usually gives rise to membrane fouling by interactions between the membrane material and precipitates which include inorganic and organic materials, as well as microbial deposits in the treated water [2]. Membrane fouling results in a decrease in performance of the membrane and limits the use of membranes at longer operating times, including reduction in water ux and solute rejection [3][4][5][6]. Hydrophilic surface is supposed to improve the anti-fouling property, and several techniques increase their a nity toward water molecules which have been studied to prepare modi ed PVDF membranes.…”

Section: Introductionmentioning

confidence: 99%

Design and Construction of Ag@MOFs Immobilized PVDF Ultrafiltration Membranes with Anti-bacterial and Antifouling Properties

Zhuang

et al. 2020

Advances in Polymer Technology

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In this work, Ag nanoparticle loading Mg(C10H16O4)2(H2O)2(Ag@MOF) composite material was successfully prepared by a facile strategy, and subsequently Ag-MOFs were used to modify the PVDF ultrafiltration membranes to obtain fouling resistance and higher water flux. The as-prepared PVDF membranes were systematically characterized by a series of analytical techniques such as Water Contact Angle (CA), Scanning Electron Microscopy (SEM), and SEM-mapping. Furthermore, the performance of membranes on antibacterial properties, the pure water flux, and fouling resistance was investigated in detail. Those results showed that the membrane modified by Ag@MOFs containing 30% Ag had the higher anti-bacterial performance, and the clear zone could be increased to 10 mm in comparison with that of blank membrane. Meanwhile, the pure water flux of Ag@MOF membranes increased from 85 L/m2 h to 157 L/m2 h, and the maximum membrane flux recovery rate (FRR) of 95.7% was obtained using SA as pollutant, which is attributed to the introduction of Ag@MOF composite material. Based on the above experimental results, it can be found that the Ag-MOF membranes displayed the excellent antibacterial activity, high water flux, and fine fouling resistance. This work provides a facile strategy to fabricate the Ag@MOFs modified membranes, and it shows an excellent anti-bacterial and water flux performance.

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Tannin-inspired robust fabrication of superwettability membranes for highly efficient separation of oil-in-water emulsions and immiscible oil/water mixtures

Cited by 61 publications

References 35 publications

Recent advances in membrane hydrophilic modification with plant polyphenol‐inspired coatings for enhanced oily emulsion separation

Recent advances in membrane hydrophilic modification with plant polyphenol‐inspired coatings for enhanced oily emulsion separation

An oil‐contamination‐resistant PVP/PAN electrospinning membrane for high‐efficient oil–water mixture and emulsion separation

Design and Construction of Ag@MOFs Immobilized PVDF Ultrafiltration Membranes with Anti-bacterial and Antifouling Properties

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