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Información tecnológica

versión On-line ISSN 0718-0764

Resumen

PAEZ, Manuel S; ALVIS, Armando  y  ARRAZOLA, Guillermo. Effect of temperature on the viscosity of dilute aqueous solutions of 1-Butyl-1-methyl imidazolium chloride [Bmim+][Cl-]. Inf. tecnol. [online]. 2014, vol.25, n.3, pp.185-190. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642014000300021.

The dynamic viscosity of dilute aqueous solutions of the ionic liquid 1-butyl-1-methyl imidazolium chloride ([Bmim+][Cl-]) in the temperature range of 283.15 to 318.15 K at atmospheric pressure 0.10 MPa was determined. For this an automatic Microviscosimeter Anton Paar (AMVn) was employed. The coefficients of viscosity A, B and D were evaluated, and it was found that long range forces of electrostatic nature between the ionic species [Bmim+] and [Cl-] dominate the viscosimetric behavior of the system [Bmim+] + [Cl-] + water, at all temperatures. The activation parameters of viscous flow ΔG#, ΔH# and ΔS# were also analyzed and it was found that viscous flow process was endothermic and showed a predominance of the ion-ion interactions.

Palabras clave : viscosity; [Bmim+][Cl-]; viscosity coefficients; activation parameters; long range forces.

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