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Hydration and Order...
Hydration and Ordering of Lamellar Block Copolymer Films under Controlled Water Vapor
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Kamata, Yohei (author)
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Parnell, Andrew J. (author)
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Gutfreund, Philipp (author)
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Skoda, Maximilian W. A. (author)
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- Dennison, Andrew J. C. (author)
- Uppsala universitet,Institutionen för fysik och astronomi
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Barker, Robert (author)
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Mai, Shaomin (author)
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Howse, Jonathan R. (author)
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Ryan, Anthony J. (author)
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Torikai, Naoya (author)
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Kawaguchi, Masami (author)
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Jones, Richard A. L. (author)
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(creator_code:org_t)
- 2014-12-12
- 2014
- English.
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In: Macromolecules. - : American Chemical Society (ACS). - 0024-9297 .- 1520-5835. ; 47:24, s. 8682-8690
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
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- Amphiphilic block copolymers within a range of volume fraction spontaneously form vesicles in aqueous solution, where a water core is enclosed by a polymer bilayer. Thin-film rehydration is a method used to produce vesicles routinely; a thin film is immersed in water, the film swells, and vesicles are formed which bleb off from the film surface. We have studied the early stages of hydration for PEOPBO block copolymer thin films under controlled water vapor conditions to understand this formation mechanism and so enable more efficient ways to encapsulate molecules using this method. Neutron and X-ray measurements show that the initial film exhibits weakly ordered structure with isotropic parallel and vertical orientation; the films initially swell and maintain the same orientation. At a critical point the layer swells rapidly and makes highly ordered lamellae structure at the same time. The lamellae are almost exclusively oriented parallel to the substrate and swell with increasing water absorption.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Kamata, Yohei
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Parnell, Andrew ...
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Gutfreund, Phili ...
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Skoda, Maximilia ...
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Dennison, Andrew ...
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Barker, Robert
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show more...
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Mai, Shaomin
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Howse, Jonathan ...
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Ryan, Anthony J.
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Torikai, Naoya
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Kawaguchi, Masam ...
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Jones, Richard A ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
- Articles in the publication
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Macromolecules
- By the university
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Uppsala University