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

doi:10.1016/j.apsusc.2020.147031

	Experimental and calculation studies on the relationship between the hygroscopic behavior and lubrication properties of ionic liquids
	Ba, Zhaowen 1,2; Huang, Guowei3 ; Qiao, Dan 1; Feng, Dapeng 1
	2020-11-01
发表期刊	Applied Surface Science
ISSN	01694332
卷号	529
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.
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
DOI	10.1016/j.apsusc.2020.147031
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Chemistry ; Materials Science ; Physics
WOS类目	Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000564112400005
出版者	Elsevier B.V.
EI入藏号	20202708903900
EI主题词	Water absorption
EI分类号	802.3 Chemical Operations ; 803 Chemical Agents and Basic Industrial Chemicals ; 804 Chemical Products Generally ; 931 Classical Physics ; Quantum Theory ; Relativity ; 951 Materials Science
来源库	WOS
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://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
通讯作者	Qiao, Dan; Feng, Dapeng
作者单位	1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China; 2.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China; 3.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R 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).