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    Reversible swelling-shrinking behavior of hydrogen-bonded free-standing thin film stabilized by catechol reaction

    Access Status
    Fulltext not available
    Authors
    Sun, J.
    Su, Chao
    Zhang, X.
    Yin, W.
    Xu, J.
    Yang, S.
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Sun, J. and Su, C. and Zhang, X. and Yin, W. and Xu, J. and Yang, S. 2015. Reversible swelling-shrinking behavior of hydrogen-bonded free-standing thin film stabilized by catechol reaction. Langmuir. 31 (18): pp. 5147-5154.
    Source Title
    Langmuir
    DOI
    10.1021/la5048479
    ISSN
    0743-7463
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/56052
    Collection
    • Curtin Research Publications
    Abstract

    © 2015 American Chemical Society. Dopamine-modified poly(acrylic acid) (PAA-dopa) and poly(vinylpyrrolidone) (PVPON) was layer-by-layer (LbL) assembled to prepare thin film based on hydrogen bonding. The carboxylic group of acrylic acid and the phenolic hydroxyl group of dopamine can both act as hydrogen bond donors. The critical assembly and the critical disintegration pH values of PVPON/PAA-dopa film are enhanced compared with PVPON/PAA film. The hydrogen-bonded PVPON/PAA-dopa thin film can be cross-linked via catechol chemistry of dopamine. After cross-linking, the film can be exfoliated from the substrate in alkaline solution to get a free-standing film. Moreover, by tuning the pH value, deprotonation and protonation of PAA will make the hydrogen bond in the film break and reconstruct, which induces that the free-standing film has a reversible swelling-shrinking behavior.

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