Micro-/nano architectures in MOF membrane accelerate oil-water separation

phys.org | 10/10/2018 | Staff
DebraS (Posted by) Level 3
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Frequent oil spills during oil transportation have become a critical global environmental and economic problem. Traditional oil-water separation technologies, including centrifugation, filtration, dissolved air flotation, oil skimmers and adsorption, have low efficiency and consume large amounts of energy during complex separation processes.

Membrane separation is a promising and economical approach to tackle energy and environmental challenges. Inspired by the anti-wetting behavior of an oil droplet on fish scales in water, researchers have developed underwater superoleophobic materials in recent years. However, some organic polymer membranes lose oil-water separation capacity at high temperature or exposure to organic solvents. Additionally, producing most inorganic membranes entails complex preparation processes.

Order - Problems - Xue - Co-workers - Jilin

In order to solve these problems, Ming Xue and co-workers from Jilin University, China, have introduced a micro/nanostructure into a MOF membrane to improve the water/oil separation efficiency. Their results are published in Science China Materials.

"We successfully constructed a ZIF-8-coated mesh membrane with excellent oil-water separation performance by simply immersing the mesh in a precursor solution at room temperature and atmospheric pressure," said Prof. Xue. "The membrane shows underwater superoleophobic properties, which is attributed to the micro and nanostructure on the surface of the...
(Excerpt) Read more at: phys.org
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