Special wettable Azadirachta indica leaves like microarchitecture mesh filtration membrane produced by galvanic replacement reaction for layered oil/water separation

Baig, Nadeem; Kammakakam, Irshad

doi:10.1016/j.chemosphere.2022.137544

Cited by 13 publications

(2 citation statements)

References 60 publications

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“…The performance of pristine PVDF membranes for wastewater treatment is hindered due to their hydrophobic nature. In separating the oil-in-water emulsion, two factors play a critical role: (a) surface wettability and (b) suitable pore size; both of these factors work synergetically to provide maximum separation while dealing with the oil-in-water emulsions. The pristine PVDF membrane (M-0) has shown a high water contact angle of 87.6°, showing less affinity toward the water.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of a New Rationally Designed Mussel-Inspired Cationic Amphiphilic Terpolymer to Enhance the Separation and Anti-Fouling Performance of Membranes

et al. 2023

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Polyvinylidene fluoride (PVDF) membrane-based systems for treating oily wastewater are prone to fouling. Herein, we introduced a novel mussel-inspired cationic amphiphilic terpolymer consisting of monomers N,N-diallyldimethylammonium chloride (DADMAC), N,N-diallyltetradecan-1-ammonium chloride (DTDAC), and mussel-inspired N,N-diallyldopamine hydrochloride (DADAHC) to improve the performance and characteristics of the PVDF membranes for oil-in-water emulsion separations. The cationic terpolymer, poly(DADMAC-co-DTDACco-DADAHC), shortened as PDDD, was synthesized in excellent yields via free radical polymerization and has good compatibility with the PVDF owing to the presence of hydrophobic long alkyl chains in DTDAC. The presence of dopamine motifs helps stabilize the PDDD-PVDF membrane by chelating with Fe 3+ ions. The water contact angle on the PDDD-incorporated PVDF membranes was reduced from 87.6 to 54.6°, demonstrating improved hydrophilicity than pristine PVDF (M-0). The incorporation of PDDD into the PVDF improved the separation efficiencies of the membrane, which reached up to 99% while treating the oil-in-water emulsions. Incorporating PDDD into PVDF has significantly enhanced the anti-fouling characteristics of the membranes, which are indicated by their remarkable flux recovery ratio (FRR) (up to 92%). The hydrophobic and hydrophilic groups worked synergetically to enhance the performance of the fabricated membrane.

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Section: Resultsmentioning

confidence: 99%

Fabrication of a New Rationally Designed Mussel-Inspired Cationic Amphiphilic Terpolymer to Enhance the Separation and Anti-Fouling Performance of Membranes

et al. 2023

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“…Oil pollution is one of the leading causes of water contamination. There is no doubt that catastrophic effects on the marine environment have been observed after several reported periodical oil spill incidents [5]. Designing membranes with an excellent capacity to separate oil and water is highly significant [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Special Wettable Membranes for Oil/Water Separations: A Brief Overview of Properties, Types, and Recent Progress

Baig

Sajid

Salhi

et al. 2023

Colloids and Interfaces

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Periodical oil spills and massive production of industrial oil wastewater have impacted the aquatic environment and has put the sustainability of the ecosystem at risk. Oil–water separation has emerged as one of the hot areas of research due to its high environmental and societal significance. Special wettable membranes have received significant attention due to their outstanding selectivity, excellent separation efficiency, and high permeation flux. This review briefly discusses the fouling behavior of membranes and various basic wettability models. According to the special wettability, two major classes of membranes are discussed. One is superhydrophobic and superoleophilic; these membranes are selective for oil and reject water and are highly suitable for separating the water-in-oil emulsions. The second class of membranes is superhydrophilic and underwater superoleophobic; these membranes are highly selective for water, reject the oil, and are suitable for separating the oil-in-water emulsions. The properties and recent progress of the special wettable membranes are concisely discussed in each section. Finally, the review is closed with conclusive remarks and future directions.

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A facile and straightforward immersion approach to enhance the hydrophobicity of melamine sponge for efficient cleanup of crude oils and organic solvents

Chen,

Hu,

Liu

2023

J Porous Mater

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The use of biomass-modi ed hydrophobic materials for cleaning up spilled oils and organic solvents from the environment is currently in high demand. In this study, we developed a simple immersion strategy to modify commercial melamine sponge (MS) using a tetrahydrofuran (THF) extract solution of biomass such as corn stove, pine, and Eucalyptus. This modi cation process resulted in a highly hydrophobic absorbent with satisfactory superoleophilicity towards various oils (104 g.g -1 ) and organic solvents (137 g.g -1 ). The modi ed MS demonstrated a good oil adsorption capacity with a contact angle of more than 130°. Remarkably, it also exhibited excellent properties of mechanical extrusion, harsh temperature treatment, and recyclability, owing to its three-dimensional high porosity and micro/nanostructure that trap air. Moreover, we found that other biomass extraction solutions such as γvalerolactone, N, N-dimethylformamide, acetone, methanol, and ethanol could also serve as suitable modi cation agents to prepare hydrophobic MS through an immersion strategy. The hydrophobicity and stability of the modi ed MS obtained using this approach were superior to the lignin-modi ed and DESextracted lignin-modi ed MS. Our ndings open up new possibilities for the fabrication of modi ed MS with high hydrophobicity, using a facile, cost-effective, and environmentally-friendly dipping approach for the cleanup of spilled oils and organic solvents.

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Special wettable Azadirachta indica leaves like microarchitecture mesh filtration membrane produced by galvanic replacement reaction for layered oil/water separation

Cited by 13 publications

References 60 publications

Fabrication of a New Rationally Designed Mussel-Inspired Cationic Amphiphilic Terpolymer to Enhance the Separation and Anti-Fouling Performance of Membranes

Fabrication of a New Rationally Designed Mussel-Inspired Cationic Amphiphilic Terpolymer to Enhance the Separation and Anti-Fouling Performance of Membranes

Special Wettable Membranes for Oil/Water Separations: A Brief Overview of Properties, Types, and Recent Progress

A facile and straightforward immersion approach to enhance the hydrophobicity of melamine sponge for efficient cleanup of crude oils and organic solvents

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