File(s) under permanent embargo

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

journal contribution
posted on 28.07.2011, 00:00 authored by F Shah, S Glavatskih, D MacFarlane, Anthony SomersAnthony Somers, Maria ForsythMaria Forsyth, O Antzutkin
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.

History

Journal

Physical chemistry chemical physics

Volume

13

Issue

28

Pagination

12865 - 12873

Publisher

Royal Society of Chemistry

Location

Cambridge, U. K.

ISSN

1463-9076

eISSN

1463-9084

Language

eng

Notes

Article first available online 20th June 2011

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2011, The Owner Societies