Novel halogen-free chelated orthoborate–phosphonium ionic liquids : synthesis and tribophysical properties
Shah, Faiz Ullah, Glavatskih, Sergei, MacFarlane, Douglas R., Somers, Anthony, Forsyth, Maria and Antzutkin, O. N. (Oleg N.). (2011) Novel halogen-free chelated orthoborate–phosphonium ionic liquids : synthesis and tribophysical properties. Physical Chemistry Chemical Physics, Vol.13 (No.28). pp. 12865-12873. ISSN 1463-9076Full text not available from this repository.
Official URL: http://dx.doi.org/10.1039/c1cp21139k
We report on the synthesis, characterisation, and physical and tribological properties of halogen-free ionic liquids based on various chelated orthoborate anions with different phosphonium cations, both without halogen atoms in their structure. Important physical properties of the ILs including glass transition temperatures, density, viscosity and ionic conductivity were measured and are reported here. All of these new halogen-free orthoborate ionic liquids (hf-BILs) are hydrophobic and hydrolytically stable liquids at room temperature. As lubricants, these hf-BILs exhibit considerably better antiwear and friction reducing properties under boundary lubrication conditions for steel-aluminium contacts as compared with fully formulated (15W-50 grade) engine oil. Being halogen free these hf-BILs offer a more environmentally benign alternative to ILs being currently developed for lubricant applications.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry
T Technology > TA Engineering (General). Civil engineering (General)
|Divisions:||Faculty of Science > Physics|
|Library of Congress Subject Headings (LCSH):||Magnesium alloys, Lubrication and lubricants -- Additives, Ionic solutions -- Synthesis, Electrolytes, Crown ethers, Boron|
|Journal or Publication Title:||Physical Chemistry Chemical Physics|
|Publisher:||Royal Society of Chemistry|
|Page Range:||pp. 12865-12873|
|Access rights to Published version:||Restricted or Subscription Access|
|Funder:||Kempe Foundations, Luleå tekniska universitet (LTU), Australian Research Council (ARC)|
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