Underoil superhydrophilic surfaces: water adsorption in metal–organic frameworks

Highly hydrophilic surfaces in oil are usually difficult to prepare due to the high surface tension of water. In nature, sarcocarps such as Chinese yam can reserve water to keep itself fresh. Inspired by the unique wetting properties of sarcocarps, metal–organic frameworks (MOFs) that can capture mo...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2018, Vol.6 (4), p.1692-1699
Main Authors: Liu, Mingming, Tie, Lu, Li, Jing, Hou, Yuanyuan, Guo, Zhiguang
Format: Article
Language:English
Subjects:
Adsorption
Construction
Crude oil
Emulsions
Metal-organic frameworks
Metals
Steel
Surface chemistry
Surface tension
Water filtration
Water purification
Wettability
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Summary:Highly hydrophilic surfaces in oil are usually difficult to prepare due to the high surface tension of water. In nature, sarcocarps such as Chinese yam can reserve water to keep itself fresh. Inspired by the unique wetting properties of sarcocarps, metal–organic frameworks (MOFs) that can capture moisture from the atmosphere spontaneously have been proposed as building blocks for construction of underoil superhydrophilic surfaces. Herein, a mussel-inspired preparation method was adopted to coat HKUST-1 tightly on stainless-steel meshes. The MOF-based surfaces showed remarkable self-cleaning properties to crude oil under water, and could realize high-efficiency, on-demand separation of oil-in-water and water-in-oil emulsions via selective water filtration and adsorption, respectively. Water adsorption in MOFs could be extended to other extreme wettability and interfacial issues.
ISSN:2050-7488
2050-7496
DOI:10.1039/C7TA09711E