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Rheology of ionic liquids


F. Santos1, A. Ribeiro1, M. Lourenço1, C. Castro1, M. Tariq2, I. Marrucho2, J. Lopes2, H. Veiga2, A. Macatrão2, J. Esperança2, L. Rebelo2, C. Marques3 and C. Afonso3

1Departamento de Química e Bioquímica and Centro de Ciências Moleculares e Materiais, Faculdade de Ciências da Universidade de Lisboa, Portugal
2Instituto de Tecnologia Química e Biológica da Universidade Nova de Lisboa, Portugal
3Centro de Química Estrutural e Instituto Superior Técnico da Universidade Técnica de Lisboa, Portugal

Keywords: rheology ionic liquids
property: viscosity
material: ionic liquids

As part of an ongoing project the ionic liquids 1-n-butyl-3-methyl-imidazolium bis(trifluoromethanesulfonylimide) ([C4mim][NTf2]), 1-n-butyl-3-methyl-imidazolium dicyanamide ([C4mim][dca]), 1-ethyl-3-methyl-imidazolium ethylsulphate ([C2mim][EtOSO3]) and methyltrialkyl (C8,C8,C10) ammonium dicyanamide ([Aliquat®336-derived][dca]), considered to be suitable candidates for technological liquid storage media and heat transfer fluids, were in house synthesized and characterised as previously reported [1]. Of the properties more significant to the design of new equipment: density, heat capacity and viscosity, the first two were previously measured and presented [1] and herein we present the last one. Rheological measurements were performed and they show that these ionic liquids have Newtonian behaviour in the temperature range 260 to 400 K.

References
  1. C. A. Nieto de Castro et al., Fluid Phase Equilibria 294, 157 (2010)

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