Reversible wettability switching of melamine sponges for oil/water separation

Zhou, Jizhi; Guo, Jiwei; Yan, Hui; Xiao, Jingfan; Wang, Jikui

doi:10.1016/j.matchemphys.2020.123772

Cited by 17 publications

(4 citation statements)

References 37 publications

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“…Yet, they are naturally hydrophilic, which makes them inefficient to be used directly for selective removal of oils from oily wastewater. 9,10 Inspired by the lotus leaf effect, 11 superhydrophobic surfaces obtained by combining micro-nano structures with low surface energy materials can be utilized to improve the oil/water selectivity of absorbent materials. 12,13 Polyurethane sponges (PU) with high porosity, low density, high adsorption ability, low cost, a large surface area and good elasticity have been widely applied in the elds of adsorption and removal of oils and organic solvents from oily wastewater.…”

Section: Introductionmentioning

confidence: 99%

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Interfacial assembly of a durable superhydrophobic polyurethane sponge with “scalelike” structures for efficient oily emulsion separation

Liu¹,

Yang²,

Jing³

et al. 2023

J. Mater. Chem. A

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Section: Introductionmentioning

confidence: 99%

“…Yet, they are naturally hydrophilic, which makes them inefficient to be used directly for selective removal of oils from oily wastewater. 9,10…”

Section: Introductionmentioning

confidence: 99%

Interfacial assembly of a durable superhydrophobic polyurethane sponge with “scalelike” structures for efficient oily emulsion separation

Liu¹,

Yang²,

Jing³

et al. 2023

J. Mater. Chem. A

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“…With the increasing growth of industrialization and the global economy, the serious impact of water pollution on the ecosystem and human health has caused great concern. , Among different types of water pollution, organic chemical contaminants, including water insoluble oils/organics − and water-soluble dyes/nitrophenols, − have posed tremendous threats to water bodies and are detrimental to human health. In addition, polluted water is often contaminated by versatile pathogens that are harmful to humans because they can spread multiple communicable diseases.…”

Section: Introductionmentioning

confidence: 99%

Mussel-Inspired Ag NPs Immobilized on Melamine Sponge for Reduction of 4-Nitrophenol, Antibacterial Applications and Its Superhydrophobic Derivative for Oil–Water Separation

Chen

Liu

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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A functional material integrated with a variety of functions is highly desired in wastewater treatment. In this research, a mussel-inspired method of immobilizing silver nanoparticles on the skeleton of a melamine sponge is proposed and applied for water remediation. Ag NPs were reduced in situ and grown on a polydopamine-modified melamine sponge. The catalytic reduction of 4-nitrophenol (4-NP) in the presence of the obtained MS-PDA-Ag was evaluated, and the results demonstrated that the MS-PDA-Ag presented high catalytic reduction activity. In addition, the monolithic MS-PDA-Ag presents excellent reusability with no remarkable decrease in catalytic efficiency after multiple reuses. Owing to the immobilized Ag NPs, the MS-PDA-Ag can also effectively inhibit the growth of bacteria against both gram-positive and gram-negative species, making it possible for bacteria elimination in polluted water. To further explore the possibility of utilizing the MS-PDA-Ag for versatile applications, a superhydrophobic derivative (S-MS-PDA-Ag) was prepared by coating a low-surface-energy substance (octadecanethiol) on the surface of MS-PDA-Ag. The obtained S-MS-PDA-Ag presents the capacities of oil/organics adsorption and water repellence, which can separate the insoluble oil/organics from water. The melamine sponge immobilized with Ag NPs demonstrates prominent catalytic reduction of 4-NP, antibacterial activity and the superhydrophobic derivative presents the capacity of insoluble oil/organics separation from oil–water mixtures, exhibiting high potential in the remediation of polluted water.

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“…Compared with the existing two-dimensional membrane and powder materials, 3D porous materials can be used to deal with oil spills and organic pollutants in a simple, rapid, and large-scale manner. Among the 3D porous materials, melamine sponge (MS) presents a promising prospect for practical applications because of its high porosity, large production scale, and low price [11][12][13][14]. However, pristine MS absorbs both water and oil at the same time.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Super-Hydrophobic 3D Porous Nanocomposites by One Step Reaction at Room Temperature for Water Treatment

Ding

Cao

et al. 2021

Coatings

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Melamine sponge (MS) has the characteristics of multilayer network structure, high porosity, adjustable pore structure, and low price, which is considered to be an ideal material for oil leakage treatment. Here, a facile, economical, environmental friendly, and one step reaction was developed to fabricate Ag nanoparticles (NPs) decorated MS composite with tannic acid (TA) as a reducing agent. By reduction reaction, the super-hydrophobic and super-oleophylic surface of the MS–TA–Ag composite was formed, demonstrating a single selectivity for oil and water. Thus, the adsorption capacity of MS–TA–Ag composites for various oils/organic solvents can reach 48~129 times its own weight and and display superior efficiency to separate oil/organic solvent from the water. In addition, the MS–TA–Ag composite has stable super-hydrophobicity and reusability. It is exciting that modified MS exhibits excellent chemical stability properties after a long processing time with strong alkali, strong acids, and salt solutions. The simple strategy provides a method for the preparation of large-scale oil spill cleaning and recovery materials.

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Reversible wettability switching of melamine sponges for oil/water separation

Cited by 17 publications

References 37 publications

Interfacial assembly of a durable superhydrophobic polyurethane sponge with “scalelike” structures for efficient oily emulsion separation

Interfacial assembly of a durable superhydrophobic polyurethane sponge with “scalelike” structures for efficient oily emulsion separation

Mussel-Inspired Ag NPs Immobilized on Melamine Sponge for Reduction of 4-Nitrophenol, Antibacterial Applications and Its Superhydrophobic Derivative for Oil–Water Separation

Preparation of Super-Hydrophobic 3D Porous Nanocomposites by One Step Reaction at Room Temperature for Water Treatment

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