Study of ultrasonic dispersion of graphene nanoplatelets

doi:10.3390/ma12111757

	Study of ultrasonic dispersion of graphene nanoplatelets
	Zhang, Bin; Chen, Tijun
刊名	Materials
	2019-06-01
卷号	12 期号:11
关键词	Dispersion (waves) Exfoliation (materials science) Graphene Hydrophilicity Organic solvents Surface tension Temperature Ultrasonic equipment Ultrasonics Dispersion effect Exfoliation Fragmentation Fragmentation degree Graphene nanoplatelets Large specific surface areas Reaction characteristics Ultrasonic treatments
ISSN号	1996-1944
DOI	10.3390/ma12111757
英文摘要	Graphene has outstanding mechanical properties due to its unique structure, and is regarded as an ideal reinforcement of metal matrix composites. However, it is always in an agglomerate form due to its large specific surface area, and thus, it must be first dispersed prior to combining with a matrix, and ultrasonic treatment is considered to be the most effective way. In this work, the effects of parameters of tip ultrasonic treatment, such as ultrasonic time, ultrasonic power, solvent kind, and its temperature, on dispersion and structure of graphene nanoplatelets (GNPs) were studied. The results show that increasing ultrasonic time or ultrasonic power can enhance the dispersion and exfoliation effects of GNPs, but also increase fragmentation degree and disorder degree of C-atom distribution simultaneously. Solvents with low temperature, low viscosity, or high surface tension have similar effects to those of increasing ultrasonic time or power. However, for tap water, a high-surface-tension solvent, it has relatively low fragmentation degree, and good dispersion and exfoliation effects due to the hydrophilicity of GNPs. However, ethyl alcohol is a more suitable solvent because it has excellent volatility and inert reaction characteristics with GNPs and matrix alloys besides a good dispersion effect. The GNPs can achieve the expected status when they are ultrasonically treated for 4 h under a power of 960W in EA solvent at 35 °C. © 2019 by the authors.
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
语种	英语
出版者	MDPI AG, Postfach, Basel, CH-4005, Switzerland
WOS记录号	WOS:000472638600031
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/113936]
专题	材料科学与工程学院
作者单位	State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Zhang, Bin,Chen, Tijun. Study of ultrasonic dispersion of graphene nanoplatelets[J]. Materials,2019,12(11).
APA	Zhang, Bin,&Chen, Tijun.(2019).Study of ultrasonic dispersion of graphene nanoplatelets.Materials,12(11).
MLA	Zhang, Bin,et al."Study of ultrasonic dispersion of graphene nanoplatelets".Materials 12.11(2019).