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Porous poly(N-isopropylacrylamide) gels polymerized in mixed solvents of water and N,N-dimethylformamide

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Abstract

The structures of gels polymerized using a mixed solvent that induces cononsolvency during the free radical polymerization were investigated.N,N -isopropylacrylamide (NIPA) gels were polymerized in water and N,N-dimethylformamide (DMF) mixtures. The NIPA gels can have homogeneous/heterogeneous structures depending on the mole fraction of DMF, xD. The NIPA gel synthesized at xD = ca. 0.25 was opaque in appearance, and its porous structure was observed by the SEM micrograph; the porous structure is formed as the aggregates of microgels phase-separated due to the cononsolvency. The porous NIPA gels achieve a very rapid shrinking rate in response to the temperature jump, which are desirable for their applications.

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Authors and Affiliations

  1. Department of Chemical Engineering, Graduate School of Engineering, Nagoya University, 464-8603, Furo-cho, Chikusa-ku, Nagoya, Japan

    Hideaki Tokuyama & Noriaki Ishihara

  2. Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, 739-8527, Higashi-Hiroshima, Japan

    Shuji Sakohara

Authors
  1. Hideaki Tokuyama
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  2. Noriaki Ishihara
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  3. Shuji Sakohara
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Correspondence to Hideaki Tokuyama.

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Tokuyama, H., Ishihara, N. & Sakohara, S. Porous poly(N-isopropylacrylamide) gels polymerized in mixed solvents of water and N,N-dimethylformamide . Polym. Bull. 61, 399–405 (2008). https://doi.org/10.1007/s00289-008-0961-3

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  • DOI: https://doi.org/10.1007/s00289-008-0961-3

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