Tribological and Thermal Properties of Ionic Liquids

Master's Thesis

Abstract

Increasing the efficiency of existing refrigeration systems is possible if a new alternative refrigerant can be selected. An ideal refrigerant would be CO2 because it is a natural refrigerant with an extremely high efficiency. In an effort to use CO2 as a refrigerant, ionic liquid lubricants were considered to carry the CO2 and act as the working fluid. The thermal conductivity, viscosity, and pressure-viscosity coefficient were measured for several ionic liquids using a Unitherm Thermal Conductivity Measurement System, a viscometer, and an Elastohydrodynamic Lubrication (EHL) rig, respectively. The ionic liquids tested are 1-butyl-3-methylimidazolium-trifluoromethanesulfonate, tributyl(dodecyl)phosphonium 1,2,3-triazolide and trihexyl(tetradecyl)phosphonium 1,2,3-triazolide. Tests were also performed on paraffin, hexadecane, and dodecane for comparison. Results show that ionic liquids have the potential to be suitable lubricants.

Attributes

Attribute NameValues
URN
  • etd-11042012-195804

Author Amy Libardi
Advisor Steven Schmid
Contributor Tim Ovaert, Committee Member
Contributor Steven Schmid, Committee Chair
Contributor Mihir Sen, Committee Member
Degree Level Master's Thesis
Degree Discipline Aerospace and Mechanical Engineering
Degree Name MSME
Defense Date
  • 2012-09-24

Submission Date 2012-11-04
Country
  • United States of America

Subject
  • ionic liquids

  • pressure coefficient of viscosity

  • lubrication

  • pressure-viscosity coefficient

Publisher
  • University of Notre Dame

Language
  • English

Record Visibility and Access Public
Content License
  • All rights reserved

Departments and Units

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