Fabrication of Photocontrolled Surfaces for Oil/Water Separation through Sulfur(VI) Fluoride Exchange
Haiguang Zhu[a],Dongyun Chen*[a]（陈冬赟）, Najun Li[a], Qingfeng Xu[a], Hua Li[a], Jinghui He[a],Hua Wang[b], Peng Wu*[b], and Jianmei Lu*[a]（路建美）
[a] College of Chemistry, Chemical Engineering and Materials Science Collaborative Innovation Center of Suzhou Nano Science and Technology ,Soochow University, Suzhou 215123, (P. R. China)
[b] Department of Molecular Medicine, The Scripps Research Institute La Jolla, CA, 92037 (USA)
Chem. Eur. J. 2017, 23, 14712 -- 14717
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.
链接：http://onlinelibrary.wiley.com/doi/10.1002/chem.201703309/abstract