Green hydrophobic deep eutectic solvents as low-viscosity and efffcient lubricants | |
Department | 固体润滑国家重点实验室(LSL) |
Yuting Li; Cheng Cao; Meng Cai; Hao Li; Xiaoqiang Fan; Yu Gao; Zhibin Lu; Minhao Zhu | |
The second department | 216计算摩擦学课题组 |
2023-04-18 | |
Source Publication | Tribology International |
Issue | 185Pages:108531 |
Abstract | Development of novel green lubricants that meet low viscosity and effective anti-wear requirements is a tireless pursuit to improve fuel economy and reduce exhaust emissions, as well as enhance reliability. Herein a series of hydrophobic deep eutectic solvents (HDESs) with ultra-low viscosity were successfully synthesized by combining eco-friendly economical DL-menthol (DL) with fatty acids of various alkyl chain lengths. According to quantum chemistry method, weak hydrogen bond interaction between DL and fatty acid was calculated. The as-prepared DL-based HDESs lubricants present prominent physicochemical properties and lubrication functions. Thereinto, DL+Dodecanoic acid HDES with a low viscosity of 8.73 mm2 /s (40 ◦C) achieves a 23.05 % reduction in friction and a 44.22 % reduction in wear compared to the PEG 200 base oil at 491N. According to experimental characterizations and ffrst-principles calculations to reveal their anti-wear mechanism, the excellent wetting and ultra-low viscosity of the HDESs ffuid facilitates rapid physisorption and chemisorption. Meanwhile, the absorbed fflm contributes to the formation of the long alkyl chains ffow layer and the tribo-chemical fflm composed of hydrocarbon (CxHy), oxy hydrocarbon (CxHyOz) fragments and iron oxide/hydroxide-rich layer, which endows HDESs with excellent lubrication properties. This founding furnishes a new strategy to design green low-viscosity and high-performance anti-wear HDESs lubricants in sustainable lubrication applications. |
Keyword | Green lubricants Hydrophobic deep eutectic solvents Ultra-low viscosity Anti-wear mechanism First-principles calculations |
Indexed By | SCI |
If | 5.62 |
compositor | 第一作者单位 |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/30641 |
Collection | 固体润滑国家重点实验室(LSL) |
Corresponding Author | Hao Li; Yu Gao |
Affiliation | 1.Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University 2.Tribology Research Institute, School of Mechanical Engineering, Southwest Jiaotong University 3.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences |
Recommended Citation GB/T 7714 | Yuting Li,Cheng Cao,Meng Cai,et al. Green hydrophobic deep eutectic solvents as low-viscosity and efffcient lubricants[J]. Tribology International,2023(185):108531. |
APA | Yuting Li.,Cheng Cao.,Meng Cai.,Hao Li.,Xiaoqiang Fan.,...&Minhao Zhu.(2023).Green hydrophobic deep eutectic solvents as low-viscosity and efffcient lubricants.Tribology International(185),108531. |
MLA | Yuting Li,et al."Green hydrophobic deep eutectic solvents as low-viscosity and efffcient lubricants".Tribology International .185(2023):108531. |
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lunwen_7.pdf(18022KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
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