Shear dependent viscosity of poly(ethylene oxide) in two protic ionic liquids

J. A. Smith, Grant B. Webber, Gregory G. Warr, A. Zimmer, R. Atkin, O. Werzer

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


Steady shear viscosity measurements have been performed on 100. kDa poly(ethylene oxide) (PEO) dissolved in the protic ionic liquids ethylammonium nitrate (EAN) and propylammonium nitrate (PAN) and in water. The zero shear viscosity in all three solvents increases with polymer concentration, falling into three concentration regimes corresponding to dilute, semi-dilute and network solutions. Huggins plots reveal three distinct solvent conditions: good (water), good-theta (EAN) and theta (PAN). However, differences in the transition concentrations, power law behaviour of the viscosities, and relaxation times arising from shear thinning in the two ILs can be directly related to the effects of solvent nanostructure.

Original languageEnglish
Pages (from-to)56-60
Number of pages5
JournalJournal of Colloid and Interface Science
Publication statusPublished - 15 Sep 2014
Externally publishedYes


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