Bitumen-Silica Interactions in a Deep Eutectic Ionic Liquid Analogue

Nuerxida Pulati, Timothy Tighe, Paul Painter

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


In previous work, it has been shown that a deep eutectic mixture (DEM) of choline chloride and urea facilitates the detachment of bitumen from oil sands. To probe the mechanism underlying this observation, adhesive forces at the surface of the bitumen samples in deionized water and this DEM are compared using atomic force microscopy. PeakForce Tapping mode was used for force-distance measurement. Silicon nitride tips with dimensions of the order of 20 nm and silica colloidal particle attached probes with diameters of the order of 40 μm were used. For both AFM probes, the adhesion force between the probe tip and the bitumen surface decreased significantly with increasing DEM concentration, as did the dissipation energy.

Original languageEnglish (US)
Pages (from-to)249-255
Number of pages7
JournalEnergy and Fuels
Issue number1
StatePublished - Jan 21 2016

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology


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