A versatile porous 3D polyurethane/polyacrylic acid (PU-PAA) membrane for one-step multiple contaminants water purification

Developing versatile materials for simultaneous removal of organic dyes, heavy metals and oil from water has big significance for water protection. Herein, we fabricate a porous 3D polyurethane/polyacrylic acid (PU-PAA) membrane by simple solvent casting-salt leaching and thermal crosslinking, which...

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Bibliographic Details
Published in:Journal of membrane science 2018-10, Vol.563, p.191-198
Main Authors: Li, Daikun, Mao, Daoyong, Li, Qing, Chen, YaShi, Chen, Xinhong, Xu, Xi
Format: Article
Language:English
Subjects:
artificial membranes
Cationic dyes
crosslinking
dyes
Dyes separation
emulsions
filtration
Heavy metals
ions
leaching
Microemulsions separation
moieties
oils
pollutants
polyacrylic acid
polyurethanes
Porous 3D membrane
solvents
water purification
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Summary:Developing versatile materials for simultaneous removal of organic dyes, heavy metals and oil from water has big significance for water protection. Herein, we fabricate a porous 3D polyurethane/polyacrylic acid (PU-PAA) membrane by simple solvent casting-salt leaching and thermal crosslinking, which combines the properties of underwater superoleophobicity and quantities of carboxyl groups. The stable superoleophobicity can be used for efficient surfactant-stabilized oil-in-water microemulsions separation. And the negative carboxylic ions are able to capture cationic dyes and heavy metals, simultaneously. Using the PU-PAA membrane in filtration column enables one-step multiple pollutants water treatment with high flux, selectivity, recyclability, efficiency and capacity. Moreover, PU-PAA can be used for efficient dye mixture separation. These results indicate that this versatile porous 3D membrane can be a very potential candidate for advanced purification applications. •A versatile porous 3D membrane is fabricated by a simple method.•This membrane exhibits underwater superoleophobicity.•Multiple pollutants can be purified by only one-step.•The removal is fast, efficient and selective.
ISSN:0376-7388
1873-3123
DOI:10.1016/j.memsci.2018.05.066