The growth of thin lubricating films of plant oils
The extreme conditions of high pressure and shear imposed in a lubricated sliding contact could influence tribochemical reactions that could occur over long sliding distances and time scales, possibly leading to changes in both friction and film thickness. Experiments conducted with 12 plant oils re...
| Main Authors: | , |
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| Format: | Journal Article |
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Springer
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/35949 |
| _version_ | 1848754634419601408 |
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| author | Chua, Wenhsi Stachowiak, Gwidon |
| author_facet | Chua, Wenhsi Stachowiak, Gwidon |
| author_sort | Chua, Wenhsi |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The extreme conditions of high pressure and shear imposed in a lubricated sliding contact could influence tribochemical reactions that could occur over long sliding distances and time scales, possibly leading to changes in both friction and film thickness. Experiments conducted with 12 plant oils reveal for the first time, that thin lubricating films of some plant oils can grow to thicknesses much greater than what is predicted from either elastohydrodyamic theory or their adsorbed molecular heights. Some films grew as much as 25 times in thickness (unrefined canola oil), while others remained roughly unchanged (flaxseed and olive oil), or grew slightly and then collapsed during the test (safflower oil). The absence of a loss in film thickness and the viscoelastic-like behavior of the film when speeds are reduced to zero, support the view that polymerization could be the main mechanism of film growth. However, the lack of correlation between the degree of unsaturation and the film growth rate suggests that other mechanisms could also be at work. |
| first_indexed | 2025-11-14T08:43:32Z |
| format | Journal Article |
| id | curtin-20.500.11937-35949 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:43:32Z |
| publishDate | 2011 |
| publisher | Springer |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-359492017-09-13T15:20:01Z The growth of thin lubricating films of plant oils Chua, Wenhsi Stachowiak, Gwidon Boundary lubrication friction Gas chromatography Stick-slip Acidity Vegetable oils The extreme conditions of high pressure and shear imposed in a lubricated sliding contact could influence tribochemical reactions that could occur over long sliding distances and time scales, possibly leading to changes in both friction and film thickness. Experiments conducted with 12 plant oils reveal for the first time, that thin lubricating films of some plant oils can grow to thicknesses much greater than what is predicted from either elastohydrodyamic theory or their adsorbed molecular heights. Some films grew as much as 25 times in thickness (unrefined canola oil), while others remained roughly unchanged (flaxseed and olive oil), or grew slightly and then collapsed during the test (safflower oil). The absence of a loss in film thickness and the viscoelastic-like behavior of the film when speeds are reduced to zero, support the view that polymerization could be the main mechanism of film growth. However, the lack of correlation between the degree of unsaturation and the film growth rate suggests that other mechanisms could also be at work. 2011 Journal Article http://hdl.handle.net/20.500.11937/35949 10.1007/s11249-010-9731-0 Springer restricted |
| spellingShingle | Boundary lubrication friction Gas chromatography Stick-slip Acidity Vegetable oils Chua, Wenhsi Stachowiak, Gwidon The growth of thin lubricating films of plant oils |
| title | The growth of thin lubricating films of plant oils |
| title_full | The growth of thin lubricating films of plant oils |
| title_fullStr | The growth of thin lubricating films of plant oils |
| title_full_unstemmed | The growth of thin lubricating films of plant oils |
| title_short | The growth of thin lubricating films of plant oils |
| title_sort | growth of thin lubricating films of plant oils |
| topic | Boundary lubrication friction Gas chromatography Stick-slip Acidity Vegetable oils |
| url | http://hdl.handle.net/20.500.11937/35949 |