Ionic liquid viscosities

All three methods discussed above appear to provide equally high quality ionic liquid viscosity data. However, the rotational viscometer could potentially provide additional information concerning the Newtonian behavior of the ionic liquids. The capillary method has been by far the most commonly used to generate the ionic liquid viscosity data found in the literature. This is probably due to its low cost and relative ease of use. 

Further to their role as supporting electrolytes, the conductivity and electrochemical stability of ionic liquids clearly also allows them to be used as solvents for the electrochemical synthesis of conducting polymers, thereby impacting on the properties and performance of the polymers from the outset. Parameters such as the ionic liquid viscosity and conductivity, the high ionic concentration compared to conventional solvent/electrolyte systems, as well as the nature of the cation and... 

In general, the published data on the viscosity of ionic liquids is scarce. Most of this published literature on ionic liquids viscosity deals with the first generation ionic liquids. The viscosity of any fluid is highly dependent on both the measuring technique used and the purity of the samples. Given this difficulty the reported values in the literature are often neither comparable or reproducible. 

Fontaine, O., J. Ghilane, P. Martin, J.-C. Lacroix, and H. Randriamahazaka. Ionic liquid viscosity effects on the functionalization of electrode material through the electroreduction of diazonium salts. Langmuir 26, 2010 18542-18549. 

The ionic liquid viscosity change effect was obtained by the bipolar solvent (DMF). Influence of the ionic liquid viscosity has been detected by the fluorescence emission and absorption spectra. Important information is that the new electronic states of P-carotene were found in the mixture of RTIL and DMF (Bialek-Bylka, 2008). 

The RTIL s fluorescence and absorption spectra changes induced by the temperature are correlated with the ionic liquid viscosity changes. The room temperature viscosity measurements of investigated RTILs are listed in Table 5. 

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