https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:32244 Wed 16 May 2018 11:22:22 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:30467 6,6,6,14][TFSI]), with polytetra-fluoroethylene (PTFE) particles used as thickeners. Greases with different base liquid concentrations (60–80 wt %) were investigated using small-amplitude oscillatory shear and viscous flow measurements, and contact angle measurements probed adhesion at base liquid–PTFE interfaces. Rheological properties are influenced by base liquid–PTFE adhesion and the chemical structure of the grease base liquids. With the addition of thickener, the greases generally have higher elasticity, strain resistance, and frequency independent properties. Viscometric rheological tests illustrate non-Newtonian shear-thinning behaviour for all greases. [BMIM][TFSI] based greases show the most elastic properties and strain resistance, as well as the highest initial and lowest final viscosities of the greases tested.]]> Wed 11 Apr 2018 18:05:22 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:19793 Sat 24 Mar 2018 07:57:14 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:36404 iC₈)₂PO₂) diluted in octane lubricated as effectively as pure IL. However, until now the structure and composition of the lubricating adsorbed layer, which is critical for lubrication, was unknown. Here, the unconfined structure of the IL adsorbed layer at the oil-silica interface has been studied using neutron reflectometry. Multiple neutron contrasts revealed an 8 Å thick adsorbed layer, even at 60 and 80 °C. The ratio of cations and anions in the layer was investigated by synthesizing the IL with deuterated cations and measuring its reflectivity at the oil-silica interface. At 60 °C the layer was composed of 48 ± 6 mol % P₆,₆,₆,₁₄⁺ cations, 24 ± 2 mol % (ⁱC⁸)₂PO₂⁻ anions, and 28 ± 8 mol % octane, while at 80 °C the composition was 50 ± 2 mol % P₆,₆,₆,₁₄⁺, 28 ± 2 mol % (ⁱC₈)₂PO₂⁻ anions, and 22 ± 2 mol % octane. These results reinforce the importance of the judicious selection of IL cations and anions for charged surfaces and support their use in high-temperature applications.]]> Mon 27 Apr 2020 13:54:03 AEST ]]>