TY - CONF
T1 - Gel formation mechanisms of thermo-sensitive polyrotaxane solutions
AU - Kataoka, Toshiyuki
AU - Kidowaki, Masatoshi
AU - Nakajima, Takao
AU - Nagao, Yohei
AU - Changming, Zhao
AU - Ito, Kohzo
PY - 2005
Y1 - 2005
N2 - 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.
AB - 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.
KW - Cyclodextrins
KW - Differential scanning calorimetry
KW - Polyrotaxanes
KW - Rheology
KW - Slide-ring gels
KW - Thermoreversible gels
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M3 - Paper
AN - SCOPUS:33645579368
SP - 852
T2 - 54th SPSJ Annual Meeting 2005
Y2 - 25 May 2005 through 27 May 2005
ER -