Fabrication of hydrophobic NiFe2O4@poly(DVB-LMA) sponge via Pickering emulsion template method for oil/water separation

Oil/water mixtures are a potentially major source of environmental pollution if efficient separation technology is not employed during processing. A large volume of oil/water mixtures is produced via many manufacturing operations in food, petrochemical, mining, and metal industries and can be exposed to water sources on a regular basis. To date, several techniques are used in practice to deal with industrial oil/water mixtures and oil spills such as in situ burning of oil, bioremediation, and solidifiers, which change the physical shape of oil as a result of chemical interaction. Physical separation of oil/water mixtures is in industrial practice; however, the existing technologies to do so often require either dissipation of large amounts of energy (such as in cyclones and hydrocyclones) or large residence times or inventories of fluids (such as in decanters). Recently, materials with selective wettability have gained attention for application in separation of oil/water mixtures and surfactant stabilized emulsions. For example, a superhydrophobic material is selectively wettable toward oil while having a poor affinity for the aqueous phase; therefore, a superhydrophobic porous material can easily adsorb the oil while completely rejecting the water from an oil/water mixture, thus physically separating the two components. The ease of separation, low cost, and low-energy requirements are some of the other advantages offered by these materials over existing practices of oil/water separation. The present review aims to focus on the surface engineering aspects to achieve selectively wettability in materials and its their relationship with the separation of oil/water mixtures with particular focus on emulsions, on factors contributing to their stability, and on how wettability can be helpful in their separation. Finally, the challenges in application of superwettable materials will be highlighted, and potential solutions to improve the application of these materials will be put forward.

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Fabrication of PDMS@Fe3O4/MS Composite Materials and Its Application for Oil-Water Separation

Materials ◽

10.3390/ma15010115 ◽

2021 ◽

Vol 15 (1) ◽

pp. 115

Author(s):

Jiaqi Wang ◽

Zhenzhong Fan ◽

Qingwang Liu ◽

Qilei Tong ◽

Biao Wang

Keyword(s):

Magnetic Force ◽

Oil Spills ◽

Low Cost ◽

Oily Wastewater ◽

Water Separation ◽

Simple Preparation ◽

Oil Water Separation ◽

Absorbing Material ◽

Oil Water ◽

Nano Fe3o4

The discharge of oily wastewater and oil spills at sea are the current difficulties in water pollution control. This problem often leads to terrible disasters. Therefore, the effective realization of oil-water separation is a very challenging problem. Superhydrophobic sponge is a promising oil-absorbing material. In this article, we reported a superhydrophobic sponge with nano-Fe3O4 for oil-water separation. The addition of nano-Fe3O4 allows the sponge to be recycled under the action of magnetic force. The sponge has the advantages of low cost, simple preparation and efficient oil-water separation. This kind of sponge is very worthy of promotion for the treatment of oily wastewater and marine oil spill accidents.

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Simultaneous, efficient and continuous oil–water separation via antagonistically functionalized membranes prepared by atmospheric-pressure cold plasma

Scientific Reports ◽

10.1038/s41598-021-82761-9 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Dong-hyun Kim ◽

Rodolphe Mauchauffé ◽

Jongwoon Kim ◽

Se Youn Moon

Keyword(s):

Atmospheric Pressure ◽

Large Scale ◽

Oil Spills ◽

Low Cost ◽

Separation Flow ◽

Water Separation ◽

Cold Plasmas ◽

Oil Water Separation ◽

Oil Water ◽

Oil Spill Cleanup

AbstractFor decades, oil and water separation has remained a challenge. Not only oil spills but also industrial oily wastewaters are threatening our environment. Over the years, oil–water separation methods have been developed, however, there are still considerable hurdles to overcome to provide a low cost and efficient process able to treat a large amount of liquid. In this work, we suggest a continuous, simultaneous and effective oil–water separation method based on the antagonistic functionalization of meshes using atmospheric pressure cold plasmas. Using this robust plasma method, superhydrophobic/underwater-superoleophilic or superhydrophilic/underwater-superoleophobic functionalized meshes are obtained. Antagonistically functionalized meshes can simultaneously separate oil and water and show continuous separation flow rates of water (900 L m−2 h−1) and oil (400 L m−2 h−1) with high purities (> 99.9% v/v). This fast, low-cost and continuous plasma-based process can be readily and widely adopted for the selective functionalization of membranes at large scale for oil-spill cleanup and water purification.

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One-step environment-friendly process to design fire-resistant superhydrophobic carbon felts with excellent durability and oil–water separation performance

Journal of Materials Science ◽

10.1007/s10853-021-06076-w ◽

2021 ◽

Author(s):

Haitao Wang ◽

Yunpeng Zhang ◽

Fengxin Xue ◽

Wenxia Bai ◽

Xueting Shi ◽

...

Keyword(s):

Separation Performance ◽

Water Separation ◽

Environment Friendly ◽

Design Fire ◽

Oil Water Separation ◽

One Step ◽

Oil Water

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Heterogeneous wettable cotton based superhydrophobic Janus biofabric engineered with PLA/functionalized-organoclay microfibers for efficient oil–water separation

Journal of Materials Chemistry A ◽

10.1039/c7ta11260b ◽

2018 ◽

Vol 6 (17) ◽

pp. 7457-7479 ◽

Cited By ~ 75

Author(s):

Prakash M. Gore ◽

Balasubramanian Kandasubramanian

Keyword(s):

Global Warming ◽

Organic Solvents ◽

Functional Materials ◽

Heavy Oils ◽

Water Separation ◽

Environment Friendly ◽

Oil Water Separation ◽

Oil Water

The recent requirement for superwettable materials for efficient absorption of heavy oils and waste organic solvents, and the concern for the global warming has led to the advancement of environment friendly functional materials.

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A Facile Route to Fabricate Superhydrophobic Cu2O Surface for Efficient Oil–Water Separation

Coatings ◽

10.3390/coatings9100659 ◽

2019 ◽

Vol 9 (10) ◽

pp. 659 ◽

Cited By ~ 1

Author(s):

Sheng Lei ◽

Xinzuo Fang ◽

Fajun Wang ◽

Mingshan Xue ◽

Junfei Ou ◽

...

Keyword(s):

Low Cost ◽

Environmental Safety ◽

Water Separation ◽

Short Reaction Time ◽

Oil Water Separation ◽

Oil Water ◽

High Separation ◽

Application Prospects ◽

Copper Mesh ◽

Facile Route

The mixture of insoluble organics and water seriously affects human health and environmental safety. Therefore, it is important to develop an efficient material to remove oil from water. In this work, we report a superhydrophobic Cu2O mesh that can effectively separate oil and water. The superhydrophobic Cu2O surface was fabricated by a facile chemical reaction between copper mesh and hydrogen peroxide solution without any low surface reagents treatment. With the advantages of simple operation, short reaction time, and low cost, the as-synthesized superhydrophobic Cu2O mesh has excellent oil–water selectivity for many insoluble organic solvents. In addition, it could be reused for oil–water separation with a high separation ability of above 95%, which demonstrated excellent durability and reusability. We expect that this fabrication technique will have great application prospects in the application of oil–water separation.

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

Advances in Polymer Technology ◽

10.1155/2019/9536320 ◽

2019 ◽

Vol 2019 ◽

pp. 1-8 ◽

Cited By ~ 2

Author(s):

Peng Hong ◽

Zhu Liu ◽

Yang Gao ◽

Yubin Chen ◽

Mingxun Zhuang ◽

...

Keyword(s):

Large Scale ◽

Separation Efficiency ◽

Low Cost ◽

Water Repellency ◽

Dip Coating ◽

Absorption Capacity ◽

Photochromic Properties ◽

Water Separation ◽

Oil Water Separation ◽

Oil Water

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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Fabrication of robust 3D superhydrophobic material by a simple and low-cost method for oil-water separation and oil absorption

Materials Science and Engineering B ◽

10.1016/j.mseb.2017.07.013 ◽

2017 ◽

Vol 224 ◽

pp. 117-124 ◽

Cited By ~ 9

Author(s):

Chuqi Zhang ◽

Yanmei Li ◽

Ningning Bai ◽

Cui Tan ◽

Peng Cai ◽

...

Keyword(s):

Low Cost ◽

Oil Absorption ◽

Water Separation ◽

Oil Water Separation ◽

Oil Water

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Flexible, durable and magnetic nanofibrous membrane with pH-switchable wettability for efficient on-demand oil/water separation

Environmental Science Nano ◽

10.1039/c9en01023h ◽

2019 ◽

Vol 6 (12) ◽

pp. 3699-3711 ◽

Cited By ~ 16

Author(s):

Wenjing Ma ◽

Mengjie Zhang ◽

Yuansheng Li ◽

Mengmeng Kang ◽

Chaobo Huang ◽

...

Keyword(s):

Nanofibrous Membrane ◽

Water Separation ◽

Environment Friendly ◽

On Demand ◽

Oil Water Separation ◽

Oil Water

An intelligent, flexible, magnetic and robust nanofibrous membrane with pH-switchable wettability was prepared through environment-friendly methods for on-demand oil/water separation.

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