Solvation Structure of Poly(ethylene glycol) in Ionic Liquids Studied by High-energy X-ray Diffraction and Molecular Dynamics Simulations

2013 ◽  
Vol 46 (6) ◽  
pp. 2369-2375 ◽  
Author(s):  
Hanako Asai ◽  
Kenta Fujii ◽  
Kengo Nishi ◽  
Takamasa Sakai ◽  
Koji Ohara ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Ionic Liquids ◽  
Ethylene Glycol ◽  
High Energy ◽  
X Ray Diffraction ◽  
Poly Ethylene Glycol ◽  
X Ray ◽  
Solvation Structure ◽  
Poly Ethylene ◽  
Dynamics Simulations

Thermo-Responsive Supramolecular Hybrid Hydrogels Formed by Graphene Oxide-Grafted-Poly(Ethylene Glycol) and α-Cyclodextrin

2013 ◽  
Vol 718-720 ◽  
pp. 172-175
Author(s):  
Song Hua Kong ◽  
Mi Zhou ◽  
Xiao Feng Ye ◽  
Xin Qian
Keyword(s):  
Graphene Oxide ◽  
Ethylene Glycol ◽  
Coupling Reaction ◽  
X Ray Diffraction ◽  
Poly Ethylene Glycol ◽  
Hydrogen Bond Interaction ◽  
X Ray ◽  
Hybrid Hydrogels ◽  
Poly Ethylene ◽  
Glycol Methyl Ether

Poly(ethylene glycol) methyl ether-grafted-graphene oxide (GO) was synthesized by a coupling reaction and formed inclusion complexes (ICs) after selective threading of the mPEG segments of the GO-mPEG through the cavities of α-cyclodextrins (α-CDs) units. The polypseudorotaxane structures of the as-obtained hydrogels were confirmed by X-ray diffraction, TGA, DSC, and SEM. The complexation of the mPEG segments with α-CDs and the hydrogen-bond interaction between CDs resulted in the formation of supramolecular hybrid hydrogels with a strong network. The resultant hybrid hydrogels were found to be thermo-responsive, and could be applied as a promising drug delivery system.

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