Gel formation mechanisms of thermo-sensitive polyrotaxane solutions

Toshiyuki Kataoka, Masatoshi Kidowaki, Takao Nakajima, Yohei Nagao, Zhao Changming, Kohzo Ito

Research output: Contribution to conferencePaper

Abstract

Thermoreversible hydrogels of the aqueous solutions of polyrotaxanes composed of polyethylene glycol and methylated α-CDs were investigated by DSC, X-ray diffraction, and rheological measurements. With increasing temperature, these aqueous solutions show sol to gel transition since hydrophobic interaction among α-CDs leads to aggregation of freely movable α-CDs on a PEG chain. These solutions have several kinds of gel formation mechanisms which strongly depend on the substitution ratio of methyl groups.

Original languageEnglish
Number of pages1
Publication statusPublished - 2005 Dec 1
Event54th SPSJ Annual Meeting 2005 - Yokohama, Japan
Duration: 2005 May 252005 May 27

Conference

Conference54th SPSJ Annual Meeting 2005
CountryJapan
CityYokohama
Period05/5/2505/5/27

Keywords

  • Cyclodextrins
  • Differential scanning calorimetry
  • Polyrotaxanes
  • Rheology
  • Slide-ring gels
  • Thermoreversible gels

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Kataoka, T., Kidowaki, M., Nakajima, T., Nagao, Y., Changming, Z., & Ito, K. (2005). Gel formation mechanisms of thermo-sensitive polyrotaxane solutions. Paper presented at 54th SPSJ Annual Meeting 2005, Yokohama, Japan.