Nanogel-crosslinked thermo-responsive hydrogels: Synthesis and function

Takafumi Ohki, Nobuyuki Morimoto, Kimio Kurita, Kazunari Akiyoshi

Research output: Contribution to conferencePaperpeer-review


Cholesteryl-group bearing pullulans (CHP)s form stable monodispersive nanogels (20-30 nm) by inter-macromolecular self-association in water. In this study, we prepared thermo-responsive hydrogel composed of methacrylate-bearing CHP nanogels as a crosslinker and N-isopropylacrylamide (NIPA) as a thermo-responsive unit in semi-dilute aqueous solution. Thermo-responsibility of the hydrogel was evaluated by the mean diameter change after the temperature changes from 20°C to 40°C. The CHP-NIPA hydrogel showed remarkable rapid deswelling behavior. The half-deswelling time of the CHP-NIPA hydrogels was only 2.5 min. On the other hand, PNIPA hydrogels crosslinked by N,N'-methylenebisacrylamide was over 2700 min. The multi-crosslinking by nanogels significantly affected the rapid deswelling kinetics of PNIPA gels.

Original languageEnglish
Number of pages1
Publication statusPublished - 2006 Dec 1
Externally publishedYes
Event55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama, Japan
Duration: 2006 Sep 202006 Sep 22


Other55th Society of Polymer Science Japan Symposium on Macromolecules


  • Hydrogel
  • N-isopropylacrylamide
  • Nanogel
  • Self-assembly
  • Thermo-responsive

ASJC Scopus subject areas

  • Engineering(all)


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