Thermosensitive Behavior of Poly(N-isopropylacrylamide) Grafted Polystyrene Nanoparticles

DOI Web Site 被引用文献2件 参考文献111件
  • Chen Ming-Qing
    Department of Nanostructured and Advanced Materials, Graduate School of Science and Engineering, Kagoshima University
  • Serizawa Takeshi
    Department of Nanostructured and Advanced Materials, Graduate School of Science and Engineering, Kagoshima University
  • Li Mei
    Department of Chemistry, The Chinese University of Hong Kong
  • Wu Chi
    Department of Chemistry, The Chinese University of Hong Kong
  • Akashi Mitsuru
    Department of Nanostructured and Advanced Materials, Graduate School of Science and Engineering, Kagoshima University

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抄録

We analyzed the thermosensitive behavior of monodisperse polystyrene (PSt) nanoparticles having different densities and chain lengths of grafted poly(N-isopropylacrylamide) (PNIPAAm) on their surfaces. The PSt nanoparticles were synthesized by free radical copolymerization of styrene monomer with PNIPAAm macromonomers in mixed ethanol/water solvents. The grafted PNIPAAm densities on the PSt nanoparticle surfaces can be controlled by varying polymerization conditions such as reaction temperature and initiator concentrations. The nanoparticle sizes and densities of grafted PNIPAAm on their surfaces significantly affected temperature-response, which was investigated by dynamic laser light scattering. The larger PSt nanoparticle sizes and higher grafted PNIPAAm densities showed a more significant decrease in hydrodynamic diameters when temperature of dispersed solutions was raised above lower critical solution temperature of the linear PNIPAAm. The molecular weight of grafted PNIPAAm on nanoparticle surfaces had no relationship with a visible decrease in hydrodynamic diameter.

収録刊行物

  • Polymer Journal

    Polymer Journal 35 (12), 901-910, 2003

    The Society of Polymer Science, Japan

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