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Scholars Day: April 9, 2014

Rheological Properties of Phosphonium Chloride Ionic Liquid/Methanol Solutions

Ionic liquids are considered to be environmentally friendly solvents and are therefore used as alternatives to harsh volatile organic hydrocarbon (VOC) solvents. The goal of our research is to determine how the mass transport variables, specifically density and viscosity, of the ionic liquid trihexy(tetradecyl)phosphonium chloride (PILCl ) change as a function of temperature and mol fraction ionic liquid. Previous experiments in our lab have shown that PILCl is miscible with methanol over the entire range of mol fraction, in contrast to longer chain alcohols or organic solvents such as dichloromethane or THF. We have measured density and viscosity across the entire range of mol fraction (xpilcl = 0 - 1) and from 17 to 50˚C. The viscosity data follows Stokes-Einstein behavior and is linearly proportional to mol fraction. Excess molar volumes are computed from the density data and are negative suggesting that on mixing the solution volume collapses due to intermolecular interactions.

Please note that presentation times are approximate. If you are interested in attending sessions with multiple presentations, please be in the room at the start of the session.
Presenter: Zachery Mcatee (Undergraduate Student)
Topic: Chemistry
Location: 125 Hartwell
Time: 10 am Session I