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- W2893335337 abstract "Separation membranes derived from block copolymers (BCPs) have attracted significant interest due to their well-defined pores and functional surfaces. However, it still remains a challenge to prepare ultrathin BCP composite membranes in an efficient way. Here we report a facile approach for the fabrication of ultrathin BCP composite membranes by forming thin films on water surface. The BCP layer as thin as ~ 17 nm can be prepared by spreading polystyrene-block-poly(2-vinyl pyridine) (PS-b-P2VP) solutions on water surface followed by controlled evaporation. The thin layer can be readily collected and composited with macroporous supports. A thickness of ~ 260 nm of the BCP layer is necessary to guarantee the integrity. Interconnected nanoporous structures are then obtained in the BCP layer by the process of selective swelling induced pore generation. On account of the ultrathin separation layer, the composite membranes exhibit excellent permselectivity, better than many other ultrafiltration membranes. Moreover, the separation performances can be facilely regulated by tuning the swelling durations. This method is featured as cost-effective and convenient, and is expected to provide a higher chance for the production of BCP membranes at large scale." @default.
- W2893335337 created "2018-10-05" @default.
- W2893335337 creator A5004960746 @default.
- W2893335337 creator A5005315719 @default.
- W2893335337 creator A5007804464 @default.
- W2893335337 date "2018-12-01" @default.
- W2893335337 modified "2023-10-16" @default.
- W2893335337 title "Highly permeable membranes enabled by film formation of block copolymers on water surface" @default.
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- W2893335337 doi "https://doi.org/10.1016/j.memsci.2018.09.047" @default.
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