- Title
- Conformation of poly(ethylene oxide) dissolved in the solvate ionic liquid [Li(G4)]TFSI
- Creator
- Chen, Zhengfei; FitzGerald, Paul A.; Warr, Gregory G.; Atkin, Rob
- Relation
- ARC.FT120100313 http://purl.org/au-research/grants/arc/FT120100313
- Relation
- Physical Chemistry Chemical Physics Vol. 17, Issue 22, p. 14872-14878
- Publisher Link
- http://dx.doi.org/10.1039/c5cp02033f
- Publisher
- Royal Society of Chemistry
- Resource Type
- journal article
- Date
- 2015
- Description
- The conformation of 38 kDa PEO in a solvate ionic liquid (SIL), lithium tetraglyme bis(trifluoromethanesulfonyl)amide ([Li(G4)]TFSI) from dilute to concentrated solution regimes has been determined by small angle neutron scattering and rheology. SANS analysis reveals that [Li(G4)]TFSI is better than a theta solvent (theta-good) for PEO. The variation of the radius of gyration (Rg) and viscosity as a function of polymer concentration allow the overlap concentrations, c* and c**, to be identified at 13 mg mL⁻¹ and 50 mg mL⁻¹, respectively, which are similar to values reported previously for conventional ionic liquids. Unlike water and conventional ionic liquids, [Li(G4)]TFSI cannot form hydrogen bonds with PEO. Thermal gravimetric analysis indicates that the solvation of PEO by [Li(G4)]TFSI is a consequence of PEO forming coordinate bonds with the lithium by displacing the anion, but without displacing the glyme molecule.
- Subject
- ionic liquids; electrolytes; solvates; SANS
- Identifier
- http://hdl.handle.net/1959.13/1315901
- Identifier
- uon:23022
- Identifier
- ISSN:1463-9076
- Language
- eng
- Full Text
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