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Swelling behavior of poly(acrylamide)/clay nanocomposite hydrogels in acrylamide aqueous solution

Authors

  • Yongmei Jiang,

    1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Material Science and Engineering, Donghua University, Shanghai 201620, China
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  • Meifang Zhu,

    Corresponding author
    1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Material Science and Engineering, Donghua University, Shanghai 201620, China
    • State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Material Science and Engineering, Donghua University, Shanghai 201620, China
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  • Biao Li,

    1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Material Science and Engineering, Donghua University, Shanghai 201620, China
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  • Yang Liu,

    1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Material Science and Engineering, Donghua University, Shanghai 201620, China
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  • Zongyi Qin,

    1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Material Science and Engineering, Donghua University, Shanghai 201620, China
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  • Long Chen,

    1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Material Science and Engineering, Donghua University, Shanghai 201620, China
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  • Yanmo Chen

    1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Material Science and Engineering, Donghua University, Shanghai 201620, China
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Abstract

The swelling behaviors of poly(acrylamide) (PAAm)/clay nanocomposite hydrogels (hereinafter abbreviated as NC gels) in acrylamide (AAm) aqueous solution have been investigated. As-prepared PAAm/clay hydrogels (S-M gels) were posttreated by immersing them in AAm aqueous solution. It was found that the swelling ratio of the NC gels increased greatly when the concentration of the solution is below a critical concentration (c*), whereas the gels were disintegrated in the solution when the concentration of the solution is above the c*. Some disc-like particles were found in the AAm solution accompanying with the unusual swelling behaviors. This unusual swelling behavior is resulted from the change of network structure of the NC gels in AAm aqueous solution, which was further convinced by transmission electron microscopy and element analyses. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009

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