A dense graphene monolith with poloxamer prefunctionalization enabling aqueous redispersion to obtain solubilized graphene sheets

doi:10.1016/j.cclet.2020.01.021

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	A dense graphene monolith with poloxamer prefunctionalization enabling aqueous redispersion to obtain solubilized graphene sheets
	Ye, Chen ; Zhang, Fan ; Tan, Xue ; Sun, Huifang ; Dai, Wen ; Yang, Ke ; Yang, Minghui ; Du, Shiyu ; Dai, Dan ; Yu, Jinhong
刊名	CHINESE CHEMICAL LETTERS
	2020
卷号	31 期号:9 页码:2507-2511
关键词	SUPERIOR THERMAL-CONDUCTIVITY FILMS HEAT DISPERSIONS EXFOLIATION GRAPHITE FACILE GREEN
DOI	10.1016/j.cclet.2020.01.021
英文摘要	The realization of good aqueous dispersibility of commercial graphene products composed of exfoliated graphene sheets is of significance for downstream applications. However, the tap density of commercial graphene powder is quite low (0.03-0.1 kg/m(3)), meaning that 1 kg graphene powder occupies about 10-30 m(3) in volume during transportation. And, the available content of commercial graphene dispersion/slurry in aqueous medium cannot exceed 5 wt%, although the density is high (approximate to 1050 kg/m(3)). In this work, a graphene monolith was prepared by oven-drying of graphene sheets prefunctionalized with poloxamer surfactants. Our graphene monoliths not only have a high density (1500 kg/m(3)) and high graphene content (approximate to 10 wt%), but also a full capability to be completely redispersed (approximate to 100%) in water by bath sonication to obtain solubilized graphene sheets, whose lateral size and thickness are unchanged compared to as-exfoliated ones. Moreover, a simple empirical method was proposed to predict the redispersion capability of graphene monoliths using different poloxamers by contact angle measurements. Our results provide a universal approach to make exfoliated graphene-based products with better downstream availability and lower transportation cost. (C) 2020 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
学科主题	Chemistry
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/20517]
专题	2020专题
作者单位	1.Li, H 2.Lin, CT (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Marine Mat & Related Technol, Zhejiang Key Lab Marine Mat & Protect Technol, Ningbo 315201, Peoples R China. 3.Kong, J (corresponding author), MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA.
推荐引用方式 GB/T 7714	Ye, Chen,Zhang, Fan,Tan, Xue,et al. A dense graphene monolith with poloxamer prefunctionalization enabling aqueous redispersion to obtain solubilized graphene sheets[J]. CHINESE CHEMICAL LETTERS,2020,31(9):2507-2511.
APA	Ye, Chen.,Zhang, Fan.,Tan, Xue.,Sun, Huifang.,Dai, Wen.,...&Lin, Cheng-Te.(2020).A dense graphene monolith with poloxamer prefunctionalization enabling aqueous redispersion to obtain solubilized graphene sheets.CHINESE CHEMICAL LETTERS,31(9),2507-2511.
MLA	Ye, Chen,et al."A dense graphene monolith with poloxamer prefunctionalization enabling aqueous redispersion to obtain solubilized graphene sheets".CHINESE CHEMICAL LETTERS 31.9(2020):2507-2511.