Use of Functionalized Graphene-Based Materials on Grease
The growing awareness of reduced friction losses and new demands for electrical powertrains demand improved lubricants. Due to their unique properties, such as high thermal and electrical conductivity, graphene and its derivatives have been investigated for tribological applications, especially as l...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-10-01
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| Series: | Lubricants |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4442/11/10/452 |
| _version_ | 1797573157324849152 |
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| author | Eduardo Tomanik Paulo Berto Wania Christinelli Gabriela Papoulias Xavier Raby Valdirene Peressinotto |
| author_facet | Eduardo Tomanik Paulo Berto Wania Christinelli Gabriela Papoulias Xavier Raby Valdirene Peressinotto |
| author_sort | Eduardo Tomanik |
| collection | DOAJ |
| description | The growing awareness of reduced friction losses and new demands for electrical powertrains demand improved lubricants. Due to their unique properties, such as high thermal and electrical conductivity, graphene and its derivatives have been investigated for tribological applications, especially as lubricant additives. In this work, we investigated three commercially available graphene variants, one comprising a few layers and the other two comprising nanoplates, after functionalization as additives to lithium soap grease. The grease temperature dropping point increased by approximately 6 °C. Additionally, during the reciprocating friction test, friction increased with the test duration for the baseline grease, whereas it decreased for the ones containing graphene-based additives. On the test end, friction was reduced by 8% compared to the baseline grease. On a four-ball tribometer, the wear scar was reduced from 10 to 18% compared to the baseline grease. In general, no significant difference was seen between the three graphene-based variants. The promising results found with graphene nanoplates, a less expensive material than a few graphene layers, creates opportunities for a cost-competitive additive to commercial greases. |
| first_indexed | 2024-03-10T21:06:52Z |
| format | Article |
| id | doaj.art-62faf11d96b14f6aa6e2603b25e8aeff |
| institution | Directory Open Access Journal |
| issn | 2075-4442 |
| language | English |
| last_indexed | 2024-03-10T21:06:52Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Lubricants |
| spelling | doaj.art-62faf11d96b14f6aa6e2603b25e8aeff2023-11-19T17:08:03ZengMDPI AGLubricants2075-44422023-10-01111045210.3390/lubricants11100452Use of Functionalized Graphene-Based Materials on GreaseEduardo Tomanik0Paulo Berto1Wania Christinelli2Gabriela Papoulias3Xavier Raby4Valdirene Peressinotto5Gerdau Graphene, Sao Paulo 05424-050, BrazilInstituto de Pesquisas Tecnologicas, Sao Paulo 05508-901, BrazilGerdau Graphene, Sao Paulo 05424-050, BrazilInstituto de Pesquisas Tecnologicas, Sao Paulo 05508-901, BrazilGerdau Graphene, Sao Paulo 05424-050, BrazilGerdau Graphene, Sao Paulo 05424-050, BrazilThe growing awareness of reduced friction losses and new demands for electrical powertrains demand improved lubricants. Due to their unique properties, such as high thermal and electrical conductivity, graphene and its derivatives have been investigated for tribological applications, especially as lubricant additives. In this work, we investigated three commercially available graphene variants, one comprising a few layers and the other two comprising nanoplates, after functionalization as additives to lithium soap grease. The grease temperature dropping point increased by approximately 6 °C. Additionally, during the reciprocating friction test, friction increased with the test duration for the baseline grease, whereas it decreased for the ones containing graphene-based additives. On the test end, friction was reduced by 8% compared to the baseline grease. On a four-ball tribometer, the wear scar was reduced from 10 to 18% compared to the baseline grease. In general, no significant difference was seen between the three graphene-based variants. The promising results found with graphene nanoplates, a less expensive material than a few graphene layers, creates opportunities for a cost-competitive additive to commercial greases.https://www.mdpi.com/2075-4442/11/10/452graphenenano-carbongreasefrictionwear |
| spellingShingle | Eduardo Tomanik Paulo Berto Wania Christinelli Gabriela Papoulias Xavier Raby Valdirene Peressinotto Use of Functionalized Graphene-Based Materials on Grease Lubricants graphene nano-carbon grease friction wear |
| title | Use of Functionalized Graphene-Based Materials on Grease |
| title_full | Use of Functionalized Graphene-Based Materials on Grease |
| title_fullStr | Use of Functionalized Graphene-Based Materials on Grease |
| title_full_unstemmed | Use of Functionalized Graphene-Based Materials on Grease |
| title_short | Use of Functionalized Graphene-Based Materials on Grease |
| title_sort | use of functionalized graphene based materials on grease |
| topic | graphene nano-carbon grease friction wear |
| url | https://www.mdpi.com/2075-4442/11/10/452 |
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