Core extractable nano-objects: Manipulating triblock copolymer micelles

Authors

  • Lei Gao,

    1. Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
    Search for more papers by this author
  • Ke Zhang,

    1. Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
    Search for more papers by this author
  • Bo Peng,

    1. Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
    Search for more papers by this author
  • Yi Shi,

    1. Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
    Search for more papers by this author
  • Yongming Chen

    Corresponding author
    1. Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
    • Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
    Search for more papers by this author

Abstract

We report manipulation of polymer nano-objects by changing solvents through chemically crosslinking the spherical micelles of poly(3-(triethoxysilyl)propyl methacrylate)-block-polystyrene-block-poly(2-vinylpyridine) (PTEPM-b-PS-b-P2VP). In methanol, which is a common solvent of PTEPM and P2VP but poor of PS, PTEPM-b-PS-b-P2VP forms micelles with a PS core. When changing the medium into acidic water, the PTEPM segments further collapse and gelate to form a crosslinked shell outside of the PS core. When the particles are re-dispersed into tetrahydrofuran (THF), the PS segments are extracted out, producing uniform small cavity of few nanometers in each particle. Thus one sample can be used to generate well-defined nano-objects with different appearance by solvent manipulation. The particle structure development has been characterized by transmission electron microscope (TEM), DLS, and 1H NMR. © 2011 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2012

Ancillary