| Critical solution behavior of poly(N-isopropyl acrylamide) in ionic liquid-water mixtures. | |
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MedLine Citation:
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PMID: 23299223 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The wide diversity of room-temperature ionic liquids (ILs) presents opportunities for studying, and controlling, polymer phase behavior. We have examined the phase behavior of poly(N-isopropyl acrylamide) (PNIPAM) in imidazolium ILs and their mixtures with water. We find there is a strong influence of the IL anion; specifically, the tetrafluoroborate anion yields a complex phase diagram with both LCST and UCST-type regimes. PNIPAM is generally miscible at intermediate IL-water compositions, although this range depends on the polymer molecular weight. Solvatochromatic characterization of both neat and mixed solvents reveals a key role for the interplay between PNIPAM-IL hydrogen-bonding and ion-pairing within the IL. These results demonstrate that appropriate selection of ILs should allow for increased control over polymer phase behavior. |
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Authors:
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Purnendu K Nayak; Adam P Hathorne; Harry Bermudez |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2013-1-9 |
Journal Detail:
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Title: Physical chemistry chemical physics : PCCP Volume: - ISSN: 1463-9084 ISO Abbreviation: Phys Chem Chem Phys Publication Date: 2013 Jan |
Date Detail:
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Created Date: 2013-1-9 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100888160 Medline TA: Phys Chem Chem Phys Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Chemical Engineering, University of Massachusetts, Amherst, MA, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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