Please use this identifier to cite or link to this item: https://doi.org/10.3390/w8120586
Title: Metal-organic framework-functionalized alumina membranes for vacuum membrane distillation
Authors: Zuo, J 
Chung, T.-S 
Keywords: Alumina
Crystal structure
Crystalline materials
Desalination
Distillation
Hydrophobicity
Java programming language
Molecules
Organometallics
Seawater
Surface chemistry
Wetting
Functionalized membranes
Hydrophobic
Membrane distillation
Metal organic framework
Molecular engineering
Seawater desalination
Synthetic strategies
Vacuum membrane distillation
Membranes
aluminum oxide
desalination
design
distillation
hydrophobicity
permeability
seawater
wetting
Issue Date: 2016
Citation: Zuo, J, Chung, T.-S (2016). Metal-organic framework-functionalized alumina membranes for vacuum membrane distillation. Water (Switzerland) 8 (12) : 586. ScholarBank@NUS Repository. https://doi.org/10.3390/w8120586
Rights: Attribution 4.0 International
Abstract: Nature-mimetic hydrophobic membranes with high wetting resistance have been designed for seawater desalination via vacuum membrane distillation (VMD) in this study. This is achieved through molecular engineering of metal-organic framework (MOF)-functionalized alumina surfaces. A two-step synthetic strategy was invented to design the hydrophobic membranes: (1) to intergrow MOF crystals on the alumina tube substrate and (2) to introduce perfluoro molecules onto the MOF functionalized membrane surface. With the first step, the surface morphology, especially the hierarchical roughness, can be controlled by tuning the MOF crystal structure. After the second step, the perfluoro molecules function as an ultrathin layer of hydrophobic floss, which lowers the surface energy. Therefore, the resultant membranes do not only possess the intrinsic advantages of alumina supports such as high stability and high water permeability, but also have a hydrophobic surface formed by MOF functionalization. The membrane prepared under an optimum condition achieved a good VMD flux of 32.3 L/m2-h at 60 °C. This study may open up a totally new approach for design of next-generation high performance membrane distillation membranes for seawater desalination. © 2016 by the authors.
Source Title: Water (Switzerland)
URI: https://scholarbank.nus.edu.sg/handle/10635/180294
ISSN: 20734441
DOI: 10.3390/w8120586
Rights: Attribution 4.0 International
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