Nanolubrication in deep eutectic solvents
We report surface force balance measurements of the normal surface force and friction between two mica surfaces separated by a nanofilm of the deep eutectic solvent ethaline. Ethaline, a 1 : 2 mixture of choline chloride and ethylene glycol, was studied under dry conditions, under ambient conditions...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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Royal Society of Chemistry
2020
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| _version_ | 1797075003471036416 |
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| author | Hallett, JE Hayler, HJ Perkin, S |
| author_facet | Hallett, JE Hayler, HJ Perkin, S |
| author_sort | Hallett, JE |
| collection | OXFORD |
| description | We report surface force balance measurements of the normal surface force and friction between two mica surfaces separated by a nanofilm of the deep eutectic solvent ethaline. Ethaline, a 1 : 2 mixture of choline chloride and ethylene glycol, was studied under dry conditions, under ambient conditions and with added water, revealing surface structural layers and quantised frictional response highly sensitive to water content, including regions of super-lubric behaviour under dry conditions and with added water. We also report exceptionally long-ranged electrostatic repulsion far in excess of that predicted by Debye–Hückel theory for a system with such high electrolyte content, consistent with previously reported observations of “underscreening” in ionic liquid and concentrated aqueous electrolyte systems [Smith et al., J. Phys. Chem. Lett., 2016, 7(12), 2157]. |
| first_indexed | 2024-03-06T23:44:17Z |
| format | Journal article |
| id | oxford-uuid:705e71d5-55de-4f23-9964-a671de4ee752 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:44:17Z |
| publishDate | 2020 |
| publisher | Royal Society of Chemistry |
| record_format | dspace |
| spelling | oxford-uuid:705e71d5-55de-4f23-9964-a671de4ee7522022-03-26T19:36:44ZNanolubrication in deep eutectic solventsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:705e71d5-55de-4f23-9964-a671de4ee752EnglishSymplectic ElementsRoyal Society of Chemistry2020Hallett, JEHayler, HJPerkin, SWe report surface force balance measurements of the normal surface force and friction between two mica surfaces separated by a nanofilm of the deep eutectic solvent ethaline. Ethaline, a 1 : 2 mixture of choline chloride and ethylene glycol, was studied under dry conditions, under ambient conditions and with added water, revealing surface structural layers and quantised frictional response highly sensitive to water content, including regions of super-lubric behaviour under dry conditions and with added water. We also report exceptionally long-ranged electrostatic repulsion far in excess of that predicted by Debye–Hückel theory for a system with such high electrolyte content, consistent with previously reported observations of “underscreening” in ionic liquid and concentrated aqueous electrolyte systems [Smith et al., J. Phys. Chem. Lett., 2016, 7(12), 2157]. |
| spellingShingle | Hallett, JE Hayler, HJ Perkin, S Nanolubrication in deep eutectic solvents |
| title | Nanolubrication in deep eutectic solvents |
| title_full | Nanolubrication in deep eutectic solvents |
| title_fullStr | Nanolubrication in deep eutectic solvents |
| title_full_unstemmed | Nanolubrication in deep eutectic solvents |
| title_short | Nanolubrication in deep eutectic solvents |
| title_sort | nanolubrication in deep eutectic solvents |
| work_keys_str_mv | AT hallettje nanolubricationindeepeutecticsolvents AT haylerhj nanolubricationindeepeutecticsolvents AT perkins nanolubricationindeepeutecticsolvents |