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Novel halogen-free chelated orthoborate–phosphonium ionic liquids : synthesis and tribophysical properties

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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. doi:10.1039/c1cp21139k

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Official URL: http://dx.doi.org/10.1039/c1cp21139k

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Abstract

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, Engineering and Medicine > 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
ISSN: 1463-9076
Official Date: 2011
Dates:
DateEvent
2011Published
Volume: Vol.13
Number: No.28
Page Range: pp. 12865-12873
DOI: 10.1039/c1cp21139k
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: Kempe Foundations, Luleå tekniska universitet (LTU), Australian Research Council (ARC)

Data sourced from Thomson Reuters' Web of Knowledge

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