Tribo-Dependent Photoluminescent Behavior of Oleylamine-Modified AgInS<sub>2</sub> and AgInS<sub>2</sub>-ZnS Nanoparticles as Lubricant Additives
The content of Cu<sup>2+</sup> in lubricants is an essential indicator for determining the quality of the lubricant and predicting mechanical failure. Finding an effective and sensitive method for detecting Cu<sup>2+</sup> in lubricants is of great importance in oil monitorin...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-06-01
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| Series: | Lubricants |
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| Online Access: | https://www.mdpi.com/2075-4442/11/7/280 |
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| author | Yiping Sun Cheng Jiang Qin Zhao Xiaobo Wang Wenjing Lou |
| author_facet | Yiping Sun Cheng Jiang Qin Zhao Xiaobo Wang Wenjing Lou |
| author_sort | Yiping Sun |
| collection | DOAJ |
| description | The content of Cu<sup>2+</sup> in lubricants is an essential indicator for determining the quality of the lubricant and predicting mechanical failure. Finding an effective and sensitive method for detecting Cu<sup>2+</sup> in lubricants is of great importance in oil monitoring. In this work, AgInS<sub>2</sub> (AIS) and AgInS<sub>2</sub>-ZnS (ZAIS) nanoparticles (NPs) were synthesized by a simple one-step approach via in-situ surface modification by oleylamine. The as-synthesized AIS and ZAIS NPs exhibit good dispersion stability in various apolar media. The photoluminescence (PL) of AIS and ZAIS NPs as lubricating additives could reflect and monitor the lubrication state of steel-copper pairs due to the quenching effect of Cu<sup>2+</sup> from the friction process. With an optimum concentration of 0.5 wt% in paraffin oil, the friction coefficient of the AIS and ZAIS NPs at 100 N was decreased by 56.8 and 52.1% for steel-steel contacts, respectively. ZAIS was observed to be more effective than AIS in improving anti-wear (AW) and extreme pressure (EP) properties, with a load-bearing capacity of up to 1100 N. Characterization of the wear tracks by SEM and XPS indicates that a tribofilm composed of metal sulfides and oxides was formed during the lubricating process. This work not only reveals AIS and ZAIS NPs as a new class of promising candidates for lubricating additives but also unveils their potential for monitoring lubricant conditions and exploring lubricant service life. |
| first_indexed | 2024-03-11T00:54:17Z |
| format | Article |
| id | doaj.art-e7b5a9fab0f044d880cb2480d05bfdbc |
| institution | Directory Open Access Journal |
| issn | 2075-4442 |
| language | English |
| last_indexed | 2024-03-11T00:54:17Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Lubricants |
| spelling | doaj.art-e7b5a9fab0f044d880cb2480d05bfdbc2023-11-18T20:11:17ZengMDPI AGLubricants2075-44422023-06-0111728010.3390/lubricants11070280Tribo-Dependent Photoluminescent Behavior of Oleylamine-Modified AgInS<sub>2</sub> and AgInS<sub>2</sub>-ZnS Nanoparticles as Lubricant AdditivesYiping Sun0Cheng Jiang1Qin Zhao2Xiaobo Wang3Wenjing Lou4State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaState Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaState Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaState Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaState Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaThe content of Cu<sup>2+</sup> in lubricants is an essential indicator for determining the quality of the lubricant and predicting mechanical failure. Finding an effective and sensitive method for detecting Cu<sup>2+</sup> in lubricants is of great importance in oil monitoring. In this work, AgInS<sub>2</sub> (AIS) and AgInS<sub>2</sub>-ZnS (ZAIS) nanoparticles (NPs) were synthesized by a simple one-step approach via in-situ surface modification by oleylamine. The as-synthesized AIS and ZAIS NPs exhibit good dispersion stability in various apolar media. The photoluminescence (PL) of AIS and ZAIS NPs as lubricating additives could reflect and monitor the lubrication state of steel-copper pairs due to the quenching effect of Cu<sup>2+</sup> from the friction process. With an optimum concentration of 0.5 wt% in paraffin oil, the friction coefficient of the AIS and ZAIS NPs at 100 N was decreased by 56.8 and 52.1% for steel-steel contacts, respectively. ZAIS was observed to be more effective than AIS in improving anti-wear (AW) and extreme pressure (EP) properties, with a load-bearing capacity of up to 1100 N. Characterization of the wear tracks by SEM and XPS indicates that a tribofilm composed of metal sulfides and oxides was formed during the lubricating process. This work not only reveals AIS and ZAIS NPs as a new class of promising candidates for lubricating additives but also unveils their potential for monitoring lubricant conditions and exploring lubricant service life.https://www.mdpi.com/2075-4442/11/7/280AgInS<sub>2</sub>AgInS<sub>2</sub>-ZnSlubricant additivefriction and wearphotoluminescence |
| spellingShingle | Yiping Sun Cheng Jiang Qin Zhao Xiaobo Wang Wenjing Lou Tribo-Dependent Photoluminescent Behavior of Oleylamine-Modified AgInS<sub>2</sub> and AgInS<sub>2</sub>-ZnS Nanoparticles as Lubricant Additives Lubricants AgInS<sub>2</sub> AgInS<sub>2</sub>-ZnS lubricant additive friction and wear photoluminescence |
| title | Tribo-Dependent Photoluminescent Behavior of Oleylamine-Modified AgInS<sub>2</sub> and AgInS<sub>2</sub>-ZnS Nanoparticles as Lubricant Additives |
| title_full | Tribo-Dependent Photoluminescent Behavior of Oleylamine-Modified AgInS<sub>2</sub> and AgInS<sub>2</sub>-ZnS Nanoparticles as Lubricant Additives |
| title_fullStr | Tribo-Dependent Photoluminescent Behavior of Oleylamine-Modified AgInS<sub>2</sub> and AgInS<sub>2</sub>-ZnS Nanoparticles as Lubricant Additives |
| title_full_unstemmed | Tribo-Dependent Photoluminescent Behavior of Oleylamine-Modified AgInS<sub>2</sub> and AgInS<sub>2</sub>-ZnS Nanoparticles as Lubricant Additives |
| title_short | Tribo-Dependent Photoluminescent Behavior of Oleylamine-Modified AgInS<sub>2</sub> and AgInS<sub>2</sub>-ZnS Nanoparticles as Lubricant Additives |
| title_sort | tribo dependent photoluminescent behavior of oleylamine modified agins sub 2 sub and agins sub 2 sub zns nanoparticles as lubricant additives |
| topic | AgInS<sub>2</sub> AgInS<sub>2</sub>-ZnS lubricant additive friction and wear photoluminescence |
| url | https://www.mdpi.com/2075-4442/11/7/280 |
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