Gold-ionic liquid nanofluids with preferably tribological properties and thermal conductivity

CORC > 兰州化学物理研究所 > 中国科学院兰州化学物理研究所 > 固体润滑国家重点实验室

	Gold-ionic liquid nanofluids with preferably tribological properties and thermal conductivity
	Wang BG(王宝刚); Lou WJ(娄文静); Wang XB(王晓波); Lou WJ(娄文静)
刊名	Nanoscale Research Letters
	2011
卷号	6 期号:259 页码:1-10
ISSN号	1556-276X
通讯作者	娄文静 ; 郝京诚
中文摘要	Gold/1-butyl-3-methylimidazolium hexafluorophosphate (Au/[Bmim][PF6]) nanofluids containing different stabilizing agents were fabricated by a facile one-step chemical reduction method, of which the nanofluids stabilized by cetyltrimethylammonium bromide (CTABr) exhibited ultrahighly thermodynamic stability. The transmission electron microscopy, UV-visible absorption, Fourier transform infrared, and X-ray photoelectron characterizations were conducted to reveal the stable mechanism. Then, the tribological properties of these ionic liquid (IL)-based gold nanofluids were first investigated in more detail. In comparison with pure [Bmim][PF6] and the nanofluids possessing poor stability, the nanofluids with high stability exhibited much better friction-reduction and anti-wear properties. For instance, the friction coefficient and wear volume lubricated by the nanofluid with rather low volumetric concentration (1.02 × 10-3 %) stabilized by CTABr under 800 N are 13.8 and 45.4% lower than that of pure [Bmim][PF6], confirming that soft Au nanoparticles (Au NPs) also can be excellent additives for high performance lubricants especially under high loads. Moreover, the thermal conductivity (TC) of the stable nanofluids with three volumetric fraction (2.55 × 10-4 , 5.1 × 10-4 , and 1.02 × 10-3 %) was also measured by a transient hot wire method as a function of temperature (33 to 81°C). The results indicate that the TC of the nanofluid (1.02 × 10-3 %) is 13.1% higher than that of [Bmim][PF6] at 81°C but no obvious variation at 33°C. The conspicuously temperature-dependent and greatly enhanced TC of Au/[Bmim][PF6] nanofluids stabilized by CTABr could be attributed to micro-convection caused by the Brownian motion of Au NPs. Our results should open new avenues to utilize Au NPs and IL
学科主题	材料科学与物理化学
收录类别	SCI
资助信息	the NFSC (grant nos. 20803087;21033005);the Major State Basic Research Development Program of China (973 Program,2007CB607606)
语种	英语
WOS记录号	WOS:000290525700125
公开日期	2012-09-24
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/797]
专题	兰州化学物理研究所_固体润滑国家重点实验室
通讯作者	Lou WJ(娄文静); Lou WJ(娄文静)
推荐引用方式 GB/T 7714	Wang BG,Lou WJ,Wang XB,et al. Gold-ionic liquid nanofluids with preferably tribological properties and thermal conductivity[J]. Nanoscale Research Letters,2011,6(259):1-10.
APA	王宝刚,娄文静,王晓波,&娄文静.(2011).Gold-ionic liquid nanofluids with preferably tribological properties and thermal conductivity.Nanoscale Research Letters,6(259),1-10.
MLA	王宝刚,et al."Gold-ionic liquid nanofluids with preferably tribological properties and thermal conductivity".Nanoscale Research Letters 6.259(2011):1-10.