Journal Published Online: 30 April 2020
Volume 4, Issue 1

Thermal Stability, Density, Rheology, and Electrical Conductivity of Two Different Ionic Liquids for Solar Thermal Applications

CODEN: SSMSCY

Abstract

This paper presents the thermophysical properties of the 1-butyl-3-methylimidazolium–based ionic liquids (ILs) with different oxidative anions such as hexafluorophosphate and tetrafluoroborate. Differential scanning calorimetry (DSC), thermogravimetric, and rheology studies were carried out for the properties’ measurement. Heating and cooling rates of 1°C/min, 3°C/min, and 5°C/min were used for the DSC analysis. The specific heat capacity of the ILs was measured in the temperature range of −40 to 40°C. The experimental result shows that the specific heat increases with increasing the temperature and the viscosity decreases with increasing the temperature. From the thermogravimetric analysis, the onset temperature of the [BF4] tetrafluoroborate and [PF6] hexafluorophosphate was 362°C and 381°C. Dynamic viscosities of the ILs samples diminished exponentially with an increase in temperature. The density of the ILs samples diminished exponentially with the rising temperature. The electrical conductivity of tetrafluoroborate has the highest electrical conductivity compared to the hexafluorophosphate.

Author Information

Ganesh Kumar, Poongavanam
Department of Mechanical Engineering, Anna University, Chennai, Tamilnadu, India
Balaji, Kumar
School of Mechanical Engineering, Vellore Institute of Technology, Vellore, Tamilnadu, India
Sakthivadivel, Duraisamy
School of Mechanical Engineering, Vellore Institute of Technology, Vellore, Tamilnadu, India
Renuka, Murugesan
EASi, Allegis Services (India) Pvt, Ltd, Bangalore, Karnataka, India
Pages: 14
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Stock #: SSMS20200001
ISSN: 2520-6478
DOI: 10.1520/SSMS20200001