Highly efficient oil-in-water emulsion and oil layer/water mixture separation based on durably superhydrophobic sponge prepared via a facile route

Wang, Jintao; Wang, Hongfei; Geng, Guihong

doi:10.1016/j.marpolbul.2017.11.060

Cited by 85 publications

(21 citation statements)

References 35 publications

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“…Commercial sponges/foams have abundant microporous structures and can reach superhydrophobicity after surface energy reduction and surface roughness increment. During the past decades, a variety of organic polymers with low surface energy such as hydrophobic organosilanes [108,125] and long-chain alkanes (i.e., fluorine/amine/thiol) [56,141] are extensively used to modify commercial sponges/foams by dip coating, solution-immersion, vapor deposition, situ-polymerization, chemical bonding, and crosslinking (Table 2). Zhang et al [124] firstly etched the original polyurethane (PU) foam by CrO 3 and H 2 SO 4 solution to create rough structures on skeleton.…”

Section: Fabrication Special-wettable Oil/water Separation Three Dmentioning

confidence: 99%

“…However, their significant disadvantages such as brittle, lack of elasticity, ease of corrosion in acid/base environment, unable to be reused, and difficulty in surface modification restrict the application in oily wastewater treatment. Recently, polymer-based three-dimensional porous materials (3D-PMs) (such as sponge [46,47,48], foam [49,50,51,52], and aerogel [53,54,55]) with multi-layered network structure, higher porosity, adsorption capability, long penetration channel, and tunable pore structure are regarded as promising alternates for effectively oil/water separation after being functionalized with special wettability [56,57,58,59,60]. This is because polymers are always light in weight, ease of processability, resistance to corrosion, chemical stability, and the abundant functional groups on the surface which can be modified with a variety of materials easily [53,61,62,63,64,65].…”

Section: Introductionmentioning

confidence: 99%

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Superwetting Polymeric Three Dimensional (3D) Porous Materials for Oil/Water Separation: A Review

2019

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Oil spills and the emission of oily wastewater have triggered serious water pollution and environment problems. Effectively separating oil and water is a world-wide challenge and extensive efforts have been made to solve this issue. Interfacial super-wetting separation materials e.g., sponge, foams, and aerogels with high porosity tunable pore structures, are regarded as effective media to selectively remove oil and water. This review article reports the latest progress of polymeric three dimensional porous materials (3D-PMs) with super wettability to separate oil/water mixtures. The theories on developing super-wetting porous surfaces and the effects of wettability on oil/water separation have been discussed. The typical 3D porous structures (e.g., sponge, foam, and aerogel), commonly used polymers, and the most reported techniques involved in developing desired porous networks have been reviewed. The performances of 3D-PMs such as oil/water separation efficiency, elasticity, and mechanical stability are discussed. Additionally, the current challenges in the fabrication and long-term operation of super-wetting 3D-PMs in oil/water separation have also been introduced.

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Section: Fabrication Special-wettable Oil/water Separation Three Dmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Superwetting Polymeric Three Dimensional (3D) Porous Materials for Oil/Water Separation: A Review

2019

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“…For these reasons, it is crucial to remove oil spills as quickly as possible. A literature overview indicates that a variety of materials have been examined extensively for this purpose and can be categorized into (a) inorganic mineral sorbents [ 13 , 14 , 15 , 16 , 17 ], (b) synthetic organic sorbents [ 18 , 19 , 20 , 21 , 22 ], and (c) natural organic sorbents [ 23 , 24 , 25 ] ( Figure 2 ). The large number of published articles (from 2000 to 2020) addressing oil spill cleanup indicates the current growing attention being paid to environmental protection ( Figure 2 ).…”

Section: Introductionmentioning

confidence: 99%

Application of Sorbents for Oil Spill Cleanup Focusing on Natural-Based Modified Materials: A Review

et al. 2020

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Conventional synthetic sorbents for oil spill removal are the most widely applied materials, although they are not the optimal choices from an economic and environmental point of view. The use of inexpensive, abundant, non-toxic, biodegradable, and reusable lignocellulosic materials might be an alternative to conventional sorbents, with obvious positive impact on sustainability and circular economy. The objective of this paper was to review reports on the use of natural-based adsorbing materials for the restoration of water bodies threatened by oil spills. The use of raw and modified natural sorbents as a restoration tool, their sorption capacity, along with the individual results in conditions that have been implemented, were examined in detail. Modification methods for improving the hydrophobicity of natural sorbents were also extensively highlighted. Furthermore, an attempt was made to assess the advantages and limitations of each natural sorbent since one material is unlikely to encompass all potential oil spill scenarios. Finally, an evaluation was conducted in order to outline an integrated approach based on the terms of material–environment–economy.

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“…Superhydrophobic interfaces, including two-dimensional materials [9][10][11][12][13][14][15] and three-dimensional porous materials [16][17][18][19][20][21][22][23], can realize e ective oil and water separation. e two-dimensional meshes or membranes need to be treated before oil water separation, but the three-dimensional superhydrophobic porous materials are promising solution with low energy.…”

Section: Introductionmentioning

confidence: 99%

Fabricated of Superhydrophobic Silanized Melamine Sponge with Photochromic Properties for Efficiency Oil/Water Separation

Peng

Gao

et al. 2019

Advances in Polymer Technology

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Superhydrophobic sponge as potential absorbing material for oil/water separation is attracting great attention recently. However, there are still some challenges to feasibly fabricate superhydrophobic sponge with large scale and low cost. Herein, a novel photochromic superhydrophobic melamine sponge (PDMS-SP sponge) is fabricated by facilely dip-coating and thermocuring of hydroxyl-terminated polydimethylsiloxanes mixed with photochromic spiropyran. FT-IR, EDS, and XPS results confirm the successful coating of PDMS-SP upon melamine sponge. The resultant sponge not only possesses excellent water repellency with a contact angle of 154.5° and oil-water separation efficiency with an oil absorption capacity of 48–116 folds of itself weight, but also shows photochromic phenomenon between colorless and purple when it is successively exposed to UV irradiation and visible light.

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Highly efficient oil-in-water emulsion and oil layer/water mixture separation based on durably superhydrophobic sponge prepared via a facile route

Cited by 85 publications

References 35 publications

Superwetting Polymeric Three Dimensional (3D) Porous Materials for Oil/Water Separation: A Review

Superwetting Polymeric Three Dimensional (3D) Porous Materials for Oil/Water Separation: A Review

Application of Sorbents for Oil Spill Cleanup Focusing on Natural-Based Modified Materials: A Review

Fabricated of Superhydrophobic Silanized Melamine Sponge with Photochromic Properties for Efficiency Oil/Water Separation

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