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A superabsorbent nanocomposite based on sodium alginate and illite/smectite mixed-layer clay

Authors

  • Yizhe Wang,

    1. Center of Eco-material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, People's Republic of China
    2. Graduate University of the Chinese Academy of Sciences, Beijing, People's Republic of China
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  • Wenbo Wang,

    1. Center of Eco-material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, People's Republic of China
    2. R&D Center of Xuyi Attapulgite Applied Technology, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou, People's Republic of China
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  • Xiaoning Shi,

    1. Center of Eco-material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, People's Republic of China
    2. Graduate University of the Chinese Academy of Sciences, Beijing, People's Republic of China
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  • Aiqin Wang

    Corresponding author
    1. Center of Eco-material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, People's Republic of China
    2. R&D Center of Xuyi Attapulgite Applied Technology, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou, People's Republic of China
    • Center of Eco-material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, People's Republic of China
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Abstract

A series of superabsorbent nanocomposites were prepared by free radical grafting copolymerization of sodium alginate, partially neutralized acrylic acid (AA), styrene, and illite/smectite mixed-layer clay (I/S). The structure and morphology of the nanocomposites were confirmed by Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscope techniques. It was shown that the incorporation of I/S clearly enhanced the swelling properties of the nanocomposites. Various salts and surfactants showed remarkable effects on the swelling behaviors of the nanocomposites. Moreover, the nanocomposite exhibited better responsive and reversible on–off switching characteristics in pH 7.0 and 2.0 buffer solutions, which renders it promising for drug delivery application. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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