TY - JOUR
T1 - The fluidity of room temperature ionic liquids
AU - Marcus, Yizhak
PY - 2014/2/15
Y1 - 2014/2/15
N2 - The fluidities, Φ=η-1, of room temperature ionic liquids (RTILs) as functions of the temperature can be described in terms of the Hildebrand and Lamoreaux approach. This relates the (temperature dependent) fluidity to the (temperature dependent) molar volume V of the RTIL: Φ=B[(V-V0)/V0]. The resulting V0 parameters, signifying the absence of free volume, are 99.0±0.5% of the molar volume at 298.15K. Counter to expectation, the B parameters increase with the interionic attractive forces. It is shown that the volumetric behavior of the RTILs permits the prediction of the temperature dependence of their viscosities, provided that the latter are not larger than ca. 50mPas-1.
AB - The fluidities, Φ=η-1, of room temperature ionic liquids (RTILs) as functions of the temperature can be described in terms of the Hildebrand and Lamoreaux approach. This relates the (temperature dependent) fluidity to the (temperature dependent) molar volume V of the RTIL: Φ=B[(V-V0)/V0]. The resulting V0 parameters, signifying the absence of free volume, are 99.0±0.5% of the molar volume at 298.15K. Counter to expectation, the B parameters increase with the interionic attractive forces. It is shown that the volumetric behavior of the RTILs permits the prediction of the temperature dependence of their viscosities, provided that the latter are not larger than ca. 50mPas-1.
KW - Fluidity
KW - Molar volume
KW - Room temperature ionic liquids
UR - http://www.scopus.com/inward/record.url?scp=84889574688&partnerID=8YFLogxK
U2 - 10.1016/j.fluid.2013.11.018
DO - 10.1016/j.fluid.2013.11.018
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AN - SCOPUS:84889574688
SN - 0378-3812
VL - 363
SP - 66
EP - 69
JO - Fluid Phase Equilibria
JF - Fluid Phase Equilibria
ER -