Journal
LANGMUIR
Volume 38, Issue 4, Pages 1422-1431Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.1c02583
Keywords
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Funding
- National Natural Science Foundation of China [51703149]
- China Postdoctoral Science Foundation [2019M651943]
- Qianjiang Talent Plan of Zhejiang Province [QJD1902018]
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In this study, we report the fabrication of magnetic, hydrophilic-oleophobic polyHIPE composites that can rapidly absorb water droplets and exhibit magnetic responsiveness. These composites can effectively remove water from oil-water mixtures and be fully collected.
Emulsion-templated, hydrophilic-oleophobic porous materials are promising for the removal of a small amount of water from oil-water mixtures, but the maneuver and complete collection of these porous materials are challenging. Herein, we report the fabrication of magnetic, hydrophilic-oleophobic polyHIPE composites from reactive Fe3O4 nanoparticle-stabilized high internal phase emulsions through simultaneous bulk polymerization of water-soluble monomers and interface-catalyzed polycondensation of 1H,1H,2H,2H-perfluorooctyltriethoxysilane. The resulting composites were hydrophilic-oleophobic, with water droplets rapidly absorbed (within 20 s), and exhibited designable magnetic responsiveness. The hydrophilicity-oleophobicity enabled water to be removed through selective absorption from oil-water mixtures (including surfactant-stabilized water-in-oil emulsions), with a high separation rate over 99%. The magnetic-responsiveness enabled both the dry and the swollen composites to be maneuvered in a remote and contactless manner and to be fully collected. Therefore, the magnetic, hydrophilic-oleophobic polyHIPE composites are excellent candidates for the removal of water from water-oil mixtures with complete collection.
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