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Imidazolium-containing, hydrophobic–ionic–hydrophilic ABC triblock copolymers: synthesis, ordered phase-separation, and supported membrane fabrication

Novel ABC triblock copolymers containing hydrophobic, imidazolium ionic liquid (IL)-based ionic, and non-charged hydrophilic blocks were synthesized by direct sequential, ring-opening metathesis polymerization (ROMP) of three chemically immiscible norborene monomers. The resulting ABC triblock copol...

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Bibliographic Details
Published in:Soft matter 2013-01, Vol.9 (33), p.7923-7927
Main Authors: Wiesenauer, Erin F., Nguyen, Phuc Tien, Newell, Brian S., Bailey, Travis S., Noble, Richard D., Gin, Douglas L.
Format: Article
Language:English
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Summary:Novel ABC triblock copolymers containing hydrophobic, imidazolium ionic liquid (IL)-based ionic, and non-charged hydrophilic blocks were synthesized by direct sequential, ring-opening metathesis polymerization (ROMP) of three chemically immiscible norborene monomers. The resulting ABC triblock copolymers were found by small-angle X-ray scattering to phase-separate into different nanostructures in their pure melt states, depending on their block sequence and compositions. Supported composite membranes of these triblock copolymers were successfully fabricated with defect-free, less than or equal to 20 microns thick top coatings. Preliminary CO sub(2)/light gas transport studies demonstrated the potential of this new type of IL-based block copolymer material for gas separation applications.
ISSN:1744-683X
1744-6848
DOI:10.1039/c3sm51085a