Magnetically driven superhydrophobic/superoleophilic graphene-based polyurethane sponge for highly efficient oil/water separation and demulsification

Jamsaz, Azam; Goharshadi, Elaheh Kafshdare; Barras, Alexandre; Ifires, Madjid; Szunerits, Sabine; Boukherroub, Rabah

doi:10.1016/j.seppur.2021.118931

Cited by 92 publications

(22 citation statements)

References 52 publications

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“…Each of these methods has its own limitation [8]. The cleanup technique can be used to separate oil/water-free mixtures in most situations, but it has drawbacks such as poor separation performance, high energy costs, and secondary emissions [9][10][11]. The latter involves the production of smoke and dust as a result of in situ oil burning on water, as well as contamination by toxic substances as a result of the use of industrial chemical dispersants [1,12], and they are also ineffective for oil/water emulsion separation [1,13].…”

Section: Introductionmentioning

confidence: 99%

Electrospun composites nanofibers from cellulose acetate/carbon black as efficient adsorbents for heavy and light machine oil from aquatic environment

et al. 2022

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The feasibility of preparing cellulose acetate/carbon black (CA/CB) composite nanofiber in one step through electrospinning process and investigating its potential oil absorbability and application for machine oil removal from aquatic environment was reported. Different CA/CB composite nanofibers were fabricated by electrospinning of cellulose acetate (CA) solution containing different loads of 0.7, 1.5, and 2.2% CB relative to the weight of CA and labeled as CA/CB0.7, CA/CB1.5, and CA/CB2.2. The scanning electron microscope (SEM) images showed continuous and smooth fiber with submicron diameter ranging from 400–900 nm with good adhering of CB into CA nanofiber. Furthermore, the CA/CB composite nanofibers exhibited high surface area compared with CA nanofiber, which reached 3.057, 2.8718 and 8.244 m2/g for CA/CB0.7, CA/CB1.5 and CA/CB2.2, respectively. Oil adsorption tests were performed with heavy and light machine oils. The CA/CB composite nanofibers showed higher affinity for oil removal from an aqueous solution than pure CA nanofiber. The CA/CB1.5 composite nanofiber has an exceptional performance for the adsorption of both oils, and the maximum oil adsorbed reached 10.6 and 18.3 g/g for light and heavy machine oils, respectively. The kinetic of machine oils adsorption was fitted well by the pseudo-second-order model. Besides, CA/CB composite nanofiber exposed good adsorption properties and respectable reusability after regeneration for four consecutive cycles. The results advocate the excellent potential of as-fabricated CA/CB composite nanofiber as a promising reusable oil adsorbent for oil spill cleanup applications.

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Section: Introductionmentioning

confidence: 99%

Electrospun composites nanofibers from cellulose acetate/carbon black as efficient adsorbents for heavy and light machine oil from aquatic environment

et al. 2022

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“… 10 , 14 We have paid attention to adsorbents coated with carbon-based materials such as carbon nanotubes (CNTs), nanodiamonds, reduced graphene oxide (RGO), and graphite among various hydrophobic materials. 11 − 13 , 15 − 20 This is because carbon-based materials have unique properties of being hydrophobic in air through chemical stability and hydrophobic interactions. 21 − 23 Depending on their shape, these carbon-based materials may provide a large specific surface area.…”

Section: Introductionmentioning

confidence: 99%

“… 21 − 23 Depending on their shape, these carbon-based materials may provide a large specific surface area. For example, RGO, which increases the specific surface area by generating and reducing graphene oxide through oxidation of graphite, 11 , 15 , 18 , 20 and CNTs, which has a large specific surface area with a unique porous structure, 13 , 16 , 19 are sometimes used. However, these require additional manufacturing processes and costs because of the different forms or structural differences of graphite.…”

Section: Introductionmentioning

confidence: 99%

“…Lastly, the in situ combustion method can be processed quickly but has the disadvantage of generating oxides . To solve this problem, a reusable polyurethane (PU) sponge-based adsorbent with hydrophobic/oleophilic properties has been reported for oil–water separation. − This is because the PU sponge has the advantages of high elasticity, elastic recovery, and relatively light weight as an adsorbent and ultimately provides a large surface area due to its porous 3D structure. However, the surface of PU is composed of carboxyl and amino groups and is generally hydrophilic, so a modified form of the surface of the PU sponge is required.…”

Section: Introductionmentioning

confidence: 99%

“…However, the surface of PU is composed of carboxyl and amino groups and is generally hydrophilic, so a modified form of the surface of the PU sponge is required. For example, by using the sequential infiltration synthesis technique, the deposition parameters are adjusted, and the coating is made as a thin film, , or hydrophobic and magnetic materials are introduced on the base, − or high-density polyethylene is dissolved in an organic solvent to coat PU. , We have paid attention to adsorbents coated with carbon-based materials such as carbon nanotubes (CNTs), nanodiamonds, reduced graphene oxide (RGO), and graphite among various hydrophobic materials. − ,− This is because carbon-based materials have unique properties of being hydrophobic in air through chemical stability and hydrophobic interactions. − Depending on their shape, these carbon-based materials may provide a large specific surface area. For example, RGO, which increases the specific surface area by generating and reducing graphene oxide through oxidation of graphite, ,,, and CNTs, which has a large specific surface area with a unique porous structure, ,, are sometimes used.…”

Section: Introductionmentioning

confidence: 99%

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Polyurethane Sponge with a Modified Specific Surface for Repeatable Oil–Water Separation

Kong

Han²,

Won

et al. 2021

ACS Omega

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Oil spill accidents contaminate the oceanic environment and cause economic distress, and they continue to occur. Many methods have been developed to restore waters contaminated with spilled oil. However, still most commercially available methods are not environmentally or economically sustainable solutions. Therefore, there is a need for the development of sustainable materials with running water treatment capabilities. In recent years, a polyurethane (PU) sponge-based adsorbent has been reported as an oil–water separation and reusable adsorbent. This is because the porous 3D structure of the PU sponge provides a large surface area. However, as the PU sponge has a carboxyl group and an amino group, it exhibits hydrophilicity, so surface modification is essential for oil–water separation. Therefore, to modify the surface of PU to have hydrophobic/oleophilic properties, a hydrophobic/oleophilic adsorbent (HOA) was prepared using graphite and polydimethylsiloxane. On the basis of this, a PU sponge, a porous material, was used to manufacture an adsorbent that can be used in a sustainable and environmentally friendly way. The prepared HOA can selectively adsorb water or oil and can be reused. Furthermore, continuous oil–water separation is possible through a simple flow of fluid. Therefore, it is confirmed that the studied HOA can have great potential for ocean restoration in the future as an adsorbent that mitigates the disadvantages of the currently commercialized method.

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A Role for Newly Developed Sorbents in Remediating Large‐Scale Oil Spills: Reviewing Recent Advances and Beyond

Kim

Zhang

Chung

et al. 2021

Advanced Sustainable Systems

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The conservation of ocean and freshwater have been crucial issues over the past decades, and oil/water separation is a well‐known technology to restore polluted water systems. In the meantime, oil sorbents serve as a promising means of achieving water conservation to recover from oil spills, which require a multi‐factorial approach to review high selectivity, capacity, and rate of oil recovery. However, reusability is a critical component to consider in incidents with large‐scale spills. With the development of sorbent technology, some studies have progressed to explore surface engineering and material design for high oil sorption capacity and durability. Thus, this systemic review, a summary of sorbent developments, serves as a guide to understanding practical applications that can apply to large‐scale oil spills and recognize remaining issues. In this review, the oil weathering process and oil sorption mechanisms in relation to the characteristics of target pollutants are introduced. Then, this comprehensive review focuses on materials in advanced sorbents. These materials have properties including, aligned channels for fast sorption, self‐heating capabilities for viscous oil cleanup, and magnetic‐responsiveness to enhance a collection of final products. The perspective and challenges for the next generation of oil spills remediation technology‐based oil sorbents materials are finally presented in the last section.

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Magnetically driven superhydrophobic/superoleophilic graphene-based polyurethane sponge for highly efficient oil/water separation and demulsification

Cited by 92 publications

References 52 publications

Electrospun composites nanofibers from cellulose acetate/carbon black as efficient adsorbents for heavy and light machine oil from aquatic environment

Electrospun composites nanofibers from cellulose acetate/carbon black as efficient adsorbents for heavy and light machine oil from aquatic environment

Polyurethane Sponge with a Modified Specific Surface for Repeatable Oil–Water Separation

A Role for Newly Developed Sorbents in Remediating Large‐Scale Oil Spills: Reviewing Recent Advances and Beyond

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