Thermal Conductivity of Ionic Liquids at Atmospheric Pressure: Database, Analysis, and Prediction Using a Topological Index Method

Thermal conductivity is an important
thermo­physical property
of ionic liquids (ILs). In this paper, a database for the thermal
conductivity of ILs was established by collecting experimental data
from literature covering the period from 2007 to 2013, including 359
data points, 45 ILs. The influences of temperature and the alkyl chain
length of the cation on thermal conductivity were also discussed.
A topological index method was proposed to estimate the thermal conductivity
of ILs based on collected data which were divided into training (299
data points, 38 ILs) and testing (60 data points, 7 ILs) sets. The
total average absolute deviation between the calculated and literature
data was found to be 2.3%, with 2.1% for the training set and 2.9%
for the testing set. The topological index method guarantees satisfactory
precision with a simple form and can be easily expanded to new kinds
of ILs.