Experimental and calculation studies on the relationship between the hygroscopic behavior and lubrication properties of ionic liquids

doi:10.1016/j.apsusc.2020.147031

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	Experimental and calculation studies on the relationship between the hygroscopic behavior and lubrication properties of ionic liquids
	Ba, Zhaowen 2,3; Huang, Guowei 1; Qiao, Dan 3; Feng, Dapeng 3
刊名	Applied Surface Science
	2020-11-01
卷号	529
关键词	Additives Chlorine compounds Corrosion Density functional theory Friction Ionic liquids Physicochemical properties Surface analysis Tribology Wear resistance Coefficients of friction Development and applications Film-forming abilities Good film forming ability Lubricating properties Tribological performance Tribological properties Water absorption behavior
ISSN号	01694332
DOI	10.1016/j.apsusc.2020.147031
英文摘要	The hygroscopic nature of four ionic liquids (ILs) (1-hexyl-4-methylimidazolium chloride ([HMIM][Cl]), 1-octyl-4-methylimidazolium chloride ([OMIM][Cl]), 1-hexyl-4-methylimidazolium bromide ([HMIM][Br]), 1-octyl-4-methylimidazolium bromide ([OMIM][Br])) is known to affect their physicochemical properties, but the effect on the tribological properties is not well understood. To clarify the relationship between the lubricating properties and hygroscopicity of ILs, the water absorption behavior of four ILs was studied. And then, the physicochemical, corrosion, lubricating properties of the ILs were investigated before and after water absorption. Furthermore, the lubricating mechanisms of the ILs after water absorption were explored using density functional theory calculation and surface analysis. The tribological results indicated the Cl-based ILs with low water contents had lower coefficients of friction and larger wear volumes than the pure ILs. This behavior was attributed to the good film-forming ability of the Cl-based ILs with low water contents as well as the generation of HCl. In contrast, the Cl-based ILs with high water contents and the Br-based ILs after water absorption exhibited worse tribological performance, owing to their poor film-forming abilities on steel surfaces. The findings of this study could enhance the understanding of the relationship between hygroscopicity and tribological properties for ionic liquids. It will provide important theoretical basis and technical guidance for the development and application of ionic liquids as lubricant and lubricating additives. © 2020 Elsevier B.V.
WOS研究方向	Chemistry ; Materials Science ; Physics
语种	英语
出版者	Elsevier B.V.
WOS记录号	WOS:000564112400005
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/151150]
专题	省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China 2.Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China; 3.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou; 730000, China;
推荐引用方式 GB/T 7714	Ba, Zhaowen,Huang, Guowei,Qiao, Dan,et al. Experimental and calculation studies on the relationship between the hygroscopic behavior and lubrication properties of ionic liquids[J]. Applied Surface Science,2020,529.
APA	Ba, Zhaowen,Huang, Guowei,Qiao, Dan,&Feng, Dapeng.(2020).Experimental and calculation studies on the relationship between the hygroscopic behavior and lubrication properties of ionic liquids.Applied Surface Science,529.
MLA	Ba, Zhaowen,et al."Experimental and calculation studies on the relationship between the hygroscopic behavior and lubrication properties of ionic liquids".Applied Surface Science 529(2020).