Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 23, Issue 59, Pages 14712-14717Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201703309
Keywords
exchange reaction; membrane; oil/water separation; photoresponsive; smart surface; sulfur fluoride
Categories
Funding
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- National Natural Science Foundation of China [21336005, 51573122]
- Natural Science Foundation of Jiangsu Province [BK2012625]
- National Key Technology RD Program [2015BAG20B03-06]
- Science and Technology Program for Social Development of Jiangsu [BE2015637]
- NIH [R01 GM111938]
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Smart surfaces with controllable wettability have attracted substantial interest owing to the potential use of these materials for the separation of oil from oily water caused by frequent oil-spill accidents. Because there are few separation materials on the market that are capable of switching between hydrophobicity and hydrophilicity, this work reports an efficient and low-cost method to fabricate a photoresponsive membrane through the sulfur(VI) fluoride exchange reaction (SuFEx) between poly(4-vinylphenol sulfofluoridate) and (E)-1-(4-(tert-butoxy)phenyl)-2-(4-(trifluoromethoxy)phenyl)diazene. The resulting material displays switchable wettability between hydrophobic and hydrophilic states when subjected to ultraviolet or visible irradiation. This membrane can be recycled (greater than five times) and features superior efficiency (up to 97.9%) for the separation of oils that have both higher and lower densities than water. This work is the first proof-of-concept application of SuFEx to fabricate functional materials for environmental remediation.
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