Effects of Polymer Concentration on Structure and Properties of Zwitterionic Nanocomposite Gels

  • Jinyan Ning
    State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering, Donghua University Shanghai 201620 China
  • Guang Li
    State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering, Donghua University Shanghai 201620 China
  • Kazutoshi Haraguchi
    Material Chemistry Laboratory Kawamura Institute of Chemical Research 631 Sakado Sakura Chiba 285–0078 Japan

Bibliographic Information

Published
2013-12-27
Resource Type
journal article
Rights Information
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/macp.201300637
Publisher
Wiley

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<jats:p>Zwitterionic nanocomposite gels (Zw‐NC gels) composed of a zwitterionic sulfobetaine copolymer and inorganic clay (hectorite) are synthesized through the in situ free‐radical copolymerization of <jats:italic>N,N</jats:italic>‐dimethyl(acrylamidopropyl)ammonium propanesulfonate (90 mol%) and <jats:italic>N,N</jats:italic>‐dimethylacrylamide (10 mol%) with exfoliated clay platelets in an aqueous medium. The effects of polymer concentration (<jats:italic>C</jats:italic><jats:sub>p</jats:sub>) on the dynamic viscoelasticity, tensile mechanical properties, transparency, and the thermosensitivity with the upper critical solution temperature (UCST) of the Zw‐NC gels are investigated in the range <jats:italic>C</jats:italic><jats:sub>p</jats:sub> = 26–260 g L<jats:sup>−1</jats:sup> and are compared with those of chemically cross‐linked zwitterionic gels. All the mechanical and thermosensitive properties strongly change depending on the type of network and <jats:italic>C</jats:italic><jats:sub>p</jats:sub>. The <jats:italic>C</jats:italic><jats:sub>p</jats:sub>‐induced changes in the polymer‐clay structure of the Zw‐NC gel are discussed based on the mechanical, optical, and thermosensitive properties, and on transmission electron microscopy and X‐ray diffraction measurements. <jats:boxed-text content-type="graphic" position="anchor"><jats:graphic xmlns:xlink="http://www.w3.org/1999/xlink" mimetype="image/jpg" position="anchor" specific-use="enlarged-web-image" xlink:href="graphic/macp201300637-abs-0001-m.jpg"><jats:alt-text>image</jats:alt-text></jats:graphic></jats:boxed-text></jats:p>

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