Stimuli‐<scp>R</scp>esponsive Properties of Nanocomposite Gels Comprising (2‐methoxyethylacrylate‐co‐<scp><i>N</i></scp>,<scp><i>N</i></scp>‐dimethylacrylamide) Copolymer‐<scp>C</scp>lay Networks

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  • Kazutoshi Haraguchi
    Material Chemistry Laboratory Kawamura Institute of Chemical Research 631 Sakado Sakura Chiba 285‐0078 Japan
  • Toru Takehisa
    Material Chemistry Laboratory Kawamura Institute of Chemical Research 631 Sakado Sakura Chiba 285‐0078 Japan
  • Kazutaka Murata
    Material Chemistry Laboratory Kawamura Institute of Chemical Research 631 Sakado Sakura Chiba 285‐0078 Japan

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Published
2013-07
Resource Type
journal article
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  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/masy.201300026
Publisher
Wiley

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<jats:title>Summary</jats:title><jats:sec><jats:label/><jats:p>Stimuli‐responsive properties of nanocomposite gels (MD–NC gels) consisting of (2‐methoxyethylacrylate‐co‐<jats:italic>N</jats:italic>,<jats:italic>N</jats:italic>‐dimethylacrylamide) copolymer and inorganic clay were investigated. The MD<jats:italic>x</jats:italic>–NC<jats:italic>n</jats:italic> gels were synthesized with different ratios of monomer (<jats:italic>x</jats:italic>) and clay content (<jats:italic>n</jats:italic>) by in situ free‐radical polymerization of two monomers in the presence of exfoliated clay in aqueous media. The resulting MD<jats:italic>x</jats:italic>–NC<jats:italic>n</jats:italic> gels were always uniform, but the network structure (or clay morphology) and the mechanical and swelling properties were largely dependent on the ratio of <jats:italic>x</jats:italic> and <jats:italic>n</jats:italic>. Also, well‐defined stimuli‐responsive properties such as changes in transparency and gel volume by altering the temperature and salt concentration were observed in the MD<jats:italic>x</jats:italic>–NC<jats:italic>n</jats:italic> gels, particularly with intermediate <jats:italic>x</jats:italic> (e.g., 10–50) and relatively small <jats:italic>n</jats:italic> (e.g., 2–5). Further, the reversible change in the gel size and the stress generation therefrom were observed in repeated runs. In addition, thermo‐responsive release of drugs (or chemicals) from MD<jats:italic>x</jats:italic>–NC<jats:italic>n</jats:italic> gels was observed.</jats:p></jats:sec>

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