Self-assembled microspheres driven by dipole-dipole interactions: UCST-type transition in water

Nobuyuki Morimoto, Kanna Muramatsu, Tetsuichi Wazawa, Yuichi Inoue, Makoto Suzuki

研究成果: Article査読

22 被引用数 (Scopus)

抄録

A double hydrophilic block copolymer, poly(ethylene glycol)-poly(3-dimethyl (methacryloyloxyethyl) ammonium propane sulfonate) (PEG-SB), is synthesized by reversible addition-fragmentation transfer (RAFT) polymerization using PEG methyl ether (4-cyano-4-pentanoate dodecyl trithiocarbonate) as a chain transfer agent. PEG-SB forms multi-layered microspheres with dipole-dipole interactions of the SB side chains as the driving force. The PEG-SB polymers show an upper critical solution temperature (UCST) and the UCST is controllable by the polymerization degree. The PEG-SB microspheres are dissociated above the UCST and then monodispersed microspheres (∼1 μm) are obtained when the solution temperature is decreased below the UCST again. The disassociation/ association of the microspheres is also controllable using the concentration of NaCl. These multi-responsive microspheres could be a powerful tool in the field of nano-biotechnology.

本文言語English
ページ(範囲)103-108
ページ数6
ジャーナルMacromolecular Rapid Communications
35
1
DOI
出版ステータスPublished - 2014 1月

ASJC Scopus subject areas

  • 有機化学
  • ポリマーおよびプラスチック
  • 材料化学

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