Rheological properties of gamma irradiated [Me₃NC₂H₄OH]⁺[Zn₂Cl₅]⁻ and [Me₃NC₂H₄OH]⁺[Zn₃Cl₇]⁻ ionic liquids

Abstract

The objective of this work is to verify the rheological behavior of irradiated [Me₃NC₂H₄OH]⁺[Zn₂Cl₅]⁻ and [Me₃NC₂H₄OH]⁺[Zn₃Cl₇]⁻ ionic liquids in comparison to the unirradiated ones, the viscosities were measured by a strain-control experiment under different irradiation doses’ samples(0, 10, 20, 50, 100 kGy) at different shear rates and temperatures. The curves of shear stress against shear rate present that the viscosity of ionic liquid is insensitive to shear rate; the viscosity of ionic liquids decreases with increasing temperature, and can be fitted by Arrhenius equation very well. Gamma radiation causes a decrease of viscosity of [Me₃NC₂H₄OH]⁺[Zn₃Cl₇]⁻ by greater than 10%, but it does not impair the viscosity of [Me₃NC₂H₄OH]⁺[Zn₂Cl₅]⁻ (within the experimental error) except 20 kGy irradiated sample. The results show that the radiation stability of [Me₃NC₂H₄OH]⁺[Zn₂Cl₅]⁻ is higher than that of [Me₃NC₂H₄OH]⁺[Zn₃Cl₇]⁻.

Keywords

ionic liquid / rheological property / viscosity / gamma radiation / Arrhenius equation

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