On the rheology of Pluronic F127 aqueous solutions

The rheology of aqueous solutions of Pluronic F127 is studied as a function of concentration, temperature, and shear rate. At sufficiently low temperatures, the solutions behave like Newtonian fluids; a simple empirical model is proposed for the viscosity as a function of temperature and concentrati...

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Bibliographic Details
Published in:Journal of rheology (New York : 1978) 2017-01, Vol.61 (1), p.139-146
Main Authors: Jalaal, Maziyar, Cottrell, Graeme, Balmforth, Neil, Stoeber, Boris
Format: Article
Language:English
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Summary:The rheology of aqueous solutions of Pluronic F127 is studied as a function of concentration, temperature, and shear rate. At sufficiently low temperatures, the solutions behave like Newtonian fluids; a simple empirical model is proposed for the viscosity as a function of temperature and concentration. The solutions undergo a transition to a gel at higher temperature, above which a complex rheological behavior is observed. In this regime, the solutions are viscoplastic with a yield stress that can be as large as hundreds of Pascal. We provide Herschel–Bulkley fits to the rheology for a range of temperatures above the gel point. At much higher temperatures, the rheology of the solutions becomes unsteady and difficult to characterize in terms of a steady-state flow curve.
ISSN:0148-6055
1520-8516
DOI:10.1122/1.4971992