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	Tribological properties of ultra-thin ionic liquid films on single-crystal silicon wafers with functionalized surfaces
	Yu, Bo; Zhou, Feng; Mu, Zonggang; Liang, Yongmin; Liu, Weimin
刊名	Tribology international
	2006-09-01
卷号	39期号:9页码:879-887
关键词	Ionic liquid Film Tribological behavior
ISSN号	0301-679X
DOI	10.1016/j.triboint.2005.07.039
通讯作者	Liu, weimin(wmliu@lsl.ac.cn)
英文摘要	Two kinds of room temperature ionic liquid (rtil) films carrying vinyl and hydroxyl functional groups were prepared on single-crystal si wafers by spin coating. the tribological properties of the rtil films sliding against aisi-52100 steel ball and si3n4 ball in a ball-on-plate configuration were investigated on a dynamic-static friction coefficient measurement apparatus, using perfluoropolyether (pfpe) film as a comparison. the tribological behaviors of the ionic liquid films sliding against the same counterparts at extended test durations were also evaluated using a universal umt-2mt test rig. the morphologies of the wear tracks of the rtil films and the counterparts were examined using a scanning electron microscope equipped with an energy-dispersive x-ray analyzer attachment. it was found that the tribological performances of the ionic liquid films were closely related to the chemical structures of the rtils and the chemical characteristics of the substrate surfaces. the films of vinyl group functionalized ionic liquids on hydroxylated substrate and vinyl group modified substrate exhibited very good friction-reduction and wear-resistant properties. it was assumed that there were enough strong forces between the films and substrate in these cases, and the ionic liquid molecules maintained good flexibility simultaneously. the films on hydrogen-terminated and methyl-terminated substrate showed poor tribological performance, which could be related to the relatively weak forces between the films and substrates. moreover, the films on hydroxylated substrate showed lower friction at higher sliding velocities, which was assumed to be governed by the more rapid adsorption of the ionic liquid molecules on the steel ball at a higher sliding velocity. in addition, the ionic liquid films also had excellent tribological properties as they slid against silicon nitride ball. therefore, it was supposed that the ionic liquid films could be used as a kind of universal lubricant for various combinations of the frictional pair. (c) 2005 elsevier ltd. all rights reserved.
WOS关键词	ROOM-TEMPERATURE ; LUBRICANT ; CONTACT ; STEEL
WOS研究方向	Engineering
WOS类目	Engineering, Mechanical
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000239981200006
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2379761
专题	中国科学院大学
通讯作者	Liu, Weimin
作者单位	1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Yu, Bo,Zhou, Feng,Mu, Zonggang,et al. Tribological properties of ultra-thin ionic liquid films on single-crystal silicon wafers with functionalized surfaces[J]. Tribology international,2006,39(9):879-887.
APA	Yu, Bo,Zhou, Feng,Mu, Zonggang,Liang, Yongmin,&Liu, Weimin.(2006).Tribological properties of ultra-thin ionic liquid films on single-crystal silicon wafers with functionalized surfaces.Tribology international,39(9),879-887.
MLA	Yu, Bo,et al."Tribological properties of ultra-thin ionic liquid films on single-crystal silicon wafers with functionalized surfaces".Tribology international 39.9(2006):879-887.

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