Facile one-pot synthesis of superhydrophobic reduced graphene oxide-coated polyurethane sponge at the presence of ethanol for oil-water separation

Xia, Chengbo; Li, Yanbao; Fei, Ting; Gong, Wuling

doi:10.1016/j.cej.2018.01.079

Cited by 152 publications

(51 citation statements)

References 51 publications

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“…In addition, the combination of the Shewanella strain with AQS-RGO-PUF enhanced the treatment efficiency for azo dye-containing wastewater. Xia et al [120] prepared superhydrophobic RGO-coated PU (RGO@PU) sponges with a high oil-absorption rate (oil removal occurred within 5 seconds) and a high oilwater separation efficiency (approximately 99%).…”

Section: Applications Of Graphene/polymer Composite Materialsmentioning

confidence: 99%

A Review on the Contemporary Development of Composite Materials Comprising Graphene/Graphene Derivatives

Long

Weng

2020

Advances in Materials Science and Engineering

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As two-dimensional materials with a high specific surface area, strength, and electrical and thermal conductivity, graphene (Gr) and its derivatives have great application prospects in various fields such as structural reinforcement, energy storage, optics, and electrical and thermal conductivity. However, the current preparation method of Gr is complicated and expensive. Its preparation cost can be reduced using Gr composites that include inorganic materials or other polymers. Composite materials comprising Gr and inorganic materials are generally prepared using sinter molding, chemical reduction, or chemical deposition. Gr should be able to mitigate several of the defects resulting from inorganic materials, including their poor toughness, small specific capacity, and low photoelectric conversion rate. The mitigation of these defects should result in the expansion of the applications of Gr composites for use in capacitors, catalysts, and sensors, among other devices. Although solution blending or in situ polymerization produces a relatively good mixing effect, in general, melt blending is used in the large-scale processing of Gr composites with polymer materials. Gr can be used to partially mitigate several weaknesses of polymer materials, including their low strength, poor electrical and thermal conductivities, and poor isolation performance, and expand the applications of Gr composites for use in electrical and thermal conductive materials and functional membrane materials, among other applications. The goal of the present paper is to introduce the structural properties of Gr and a surface modification method for Gr. In addition, the preparation methods and application fields of different Gr composite materials are reviewed. Finally, the development prospects and key issues are discussed.

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Section: Applications Of Graphene/polymer Composite Materialsmentioning

confidence: 99%

A Review on the Contemporary Development of Composite Materials Comprising Graphene/Graphene Derivatives

Long

Weng

2020

Advances in Materials Science and Engineering

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“…where M 0 and M t are the weights of the PU/HEC/SiO 2 before and after oil uptake, respectively. According to the references [25,28], the amount of residula oil can be calculated through simple gravimetric methods. Five grams of given oil was added into 20 mL water to form the oil-water mixture (M mix,0 ).…”

Section: Oil-water Separation Experimentsmentioning

confidence: 99%

“…Therefore, researchers are trying to explore better new oil-water separation materials.Recently, some new and efficient absorbent materials such as photoresponsive materials [15], carbon nanotubes (CNTs) [16], graphene-based materials [17][18][19], nanocellulose materials [20][21][22][23][24], and PU-based absorbents have attracted significant attention in oil-water separation applications [25,26]. PU sponge is considered to be one of the best absorbent methods because of its low density, high porosity, and high elasticity [27][28][29]. However, polyurethane (PU) is an amphiphilic material and does not possess the ability to separate an oil-water mixture.…”

mentioning

confidence: 99%

In-Situ Synthesis of Hydrophobic Polyurethane Ternary Composite Induced by Hydroxyethyl Cellulose through a Green Method for Efficient Oil Removal

et al. 2020

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Hydroxyethyl cellulose (HEC) was introduced to activate the surface of polyurethane (PU) sponge to successfully prepare a hydrophobic ternary composite PU/HEC/SiO2. The hydrophobic layer of the composite was realized by in-situ polymerization of methyltriethoxysilane (MTES) onto the surface of PU sponge. The formation of a stable hydrophobic SiO2 layer solved successfully the problem of ease of SiO2 particles shedding from the composite. Moreover, the amphiphilic molecules produced by the hydrolysis of MTES monomers facilitated the preparation of hydrophobic materials by aqueous dispersion polymerization. Aqueous synthesis made the reaction process environmentally-friendly and pollution-free. The as-prepared composite PU/HEC/SiO2 not only retains high porosity and low density of the PU sponge, but also considerably reduced the surface free energy and increased the surface roughness of the PU sponge. Therefore, outstanding hydrophobicity and high porosity endow the composite with excellent oil removal capability as a high-efficiency absorbent. Moreover, the hydrophobic composite that had absorbed oil could be regenerated easily by squeezing and recycling.

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“…PU sponge is a low-cost, soft, porous material that can absorb large amounts of water/oil. Moreover, specialty sponges with specific surface properties, for example, super-hydrophobic or with a super-oleophilic surface, can be easily obtained via physical or chemical modification (Li et al 2016(Li et al , 2019Qiang et al 2018;Xia et al 2018;Qiu et al 2019). With excellent physical, chemical and easy chemical modification properties, CNTs are considered one of the most promising carbon-based materials for future use because of their potential applications (De Volder et al 2013;Geier et al 2015;Yan et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Temporary consolidation and packaging of fragile cultural relics at underwater archaeological sites to maintain their original state during extraction

et al. 2020

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The flexible sponge/epoxy composite can wrap underwater artefacts in any shape and forms a protective shell after curing, thus effectively wrapping and reinforcing the artefacts. However, the hydroscopicity of the sponge itself limits the underwater application of the sponge/epoxy composite. In this study, a novel polyurethane sponge was prepared by modified with super‐hydrophobic multi‐wall carbon nanotubes (SH‐MWCNTs@PU sponge). Compared with the pristine PU sponge, the water‐contact angle on the surface of SH‐MWCNTs@PU sponges increased from 103.3 ± 1.82 to 152.6 ± 1.54o, and oily epoxy resin was able to cover the surface completely. The study shows that when SH‐MWCNTs@PU sponges/epoxy resin composite material is used underwater, it prevents both water from entering the sponge and also the inside epoxy resin from overflowing into the water. Moreover, the composite materials have excellent toughness after reinforcement under water (flexural strength = 3.56 MPa) and the soft sponges can be moulded to wrap any type of underwater artefacts. In the laboratory, when taking a broken, three‐dimensional blue‐and‐white porcelain pot as a research subject, the entire retrieval process—temporary stabilization, packaging, extraction and reinforcement material removal—was simulated to evaluate systematically all the technological aspects of safely excavating fragile underwater relics.

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Facile one-pot synthesis of superhydrophobic reduced graphene oxide-coated polyurethane sponge at the presence of ethanol for oil-water separation

Cited by 152 publications

References 51 publications

A Review on the Contemporary Development of Composite Materials Comprising Graphene/Graphene Derivatives

A Review on the Contemporary Development of Composite Materials Comprising Graphene/Graphene Derivatives

In-Situ Synthesis of Hydrophobic Polyurethane Ternary Composite Induced by Hydroxyethyl Cellulose through a Green Method for Efficient Oil Removal

Temporary consolidation and packaging of fragile cultural relics at underwater archaeological sites to maintain their original state during extraction

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