Remarkable improvements in the stability and thermal conductivity of graphite/ethylene glycol nanofluids caused by a graphene oxide percolation structure

CORC > 兰州化学物理研究所 > 中国科学院兰州化学物理研究所 > 清洁能源化学与材料实验室

	Remarkable improvements in the stability and thermal conductivity of graphite/ethylene glycol nanofluids caused by a graphene oxide percolation structure
	Wang BG(王宝刚)1 ; Hao JC(郝京诚)2; Li HG(李洪光)1 ; Li HG(李洪光)
刊名	Dalton Transactions
	2013
卷号	42 期号:16 页码:5866-5873
ISSN号	1477-9226
通讯作者	李洪光
英文摘要	Versatile efforts have been made to improve the stability of graphite/ethylene glycol (EG) nanofluids. Primitively, non-dispersible graphite nanoparticles were converted to graphite oxide nanoparticles (GONs) by acid treatment. Although GONs could be well dispersed in EG, the GONs/EG nanofluids exhibited limited stability up to less than 1 day. And then, a GO (2 wt%) percolation structure formed in EG was used to anchor and support GONs by common non-covalent interactions including hydrogen bonds, van der Waals forces and pi-pi conjugation. Transmission electron microscopy observations revealed that a GON-GO hybrid forms in the GON-GO (2 wt%)/EG nanofluids with evenly distributed GONs on the GO sheets, which accounted for the high stability of nanofluids up to at least 4 weeks obtained from stability tests, in sharp contrast to that of the GONs/EG nanofluids. In addition, due to the better dispersed state of GONs induced by the GO percolation structure, thermal conductivity (TC) tests demonstrated that the TC enhancements of the GON-GO (2 wt%)/EG nanofluids were also strengthened compared to that of GONs/EG nanofluids. Excitingly, the GONs-GO (2 wt%)/EG nanofluids presented here exhibited anomalous thermal conductivity enhancements up to 123% at 21 wt% GONs content and were highly stable, which might have potential applications in engineering field and energy systems.
学科主题	材料科学与物理化学
收录类别	SCI
资助信息	the Hundred Talents Program of Chinese Academy of Sciences;;NSFC (21033005);the National Basic Research Program of China (973 Program, 2009CB930103)
语种	英语
WOS记录号	WOS:000316869400036
公开日期	2013-12-07
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/4559]
专题	兰州化学物理研究所_清洁能源化学与材料实验室
通讯作者	Li HG(李洪光)
作者单位	1.Chinese Acad Sci, Lanzhou Inst Chem Phys, Lab Clean Energy Chem & Mat, Lanzhou 730000, Peoples R China 2.Shandong Univ, Minist Educ, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China
推荐引用方式 GB/T 7714	Wang BG,Hao JC,Li HG,et al. Remarkable improvements in the stability and thermal conductivity of graphite/ethylene glycol nanofluids caused by a graphene oxide percolation structure[J]. Dalton Transactions,2013,42(16):5866-5873.
APA	Wang BG,Hao JC,Li HG,&李洪光.(2013).Remarkable improvements in the stability and thermal conductivity of graphite/ethylene glycol nanofluids caused by a graphene oxide percolation structure.Dalton Transactions,42(16),5866-5873.
MLA	Wang BG,et al."Remarkable improvements in the stability and thermal conductivity of graphite/ethylene glycol nanofluids caused by a graphene oxide percolation structure".Dalton Transactions 42.16(2013):5866-5873.