Preparation and characterization of high concentration graphene aqueous dispersion

被引：1
|
作者：
Wang Chen [1 ]
Yan Shao-jiu [1 ]
Nan Wen-zheng [1 ]
Wang Ji-xian [1 ]
Peng Si-kan [1 ]
机构：
[1] AECC Beijing Inst Aeronaut Mat, Res Ctr Graphene Applicat, Beijing 100095, Peoples R China
来源：
CAILIAO GONGCHENG-JOURNAL OF MATERIALS ENGINEERING | 2019年 / 47卷 / 04期
关键词：
flake graphite; high-pressure homogenization liquid phase exfoliation; graphene aqueous dispersion; high concentration; FEW-LAYER GRAPHENE; SURFACTANT ADSORPTION; EXFOLIATION; GROWTH; ENERGY; FILMS;
D O I：
10.11868/j.issn.1001-4381.2018.000478
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The high concentration graphene aqueous dispersion was obtained by high-pressure homogenization liquid phase exfoliation (HPH-LPE) of flake graphite in water. The effect of surfactant concentration, HPH pressure and cycle number on the concentration of graphene dispersion C-G was studied by UV-Vis spectra. The structure and morphology of graphene were analyzed by Roman spectra, SEM and TEM. The results indicate that C-G is obtained up to 324.3 mg.L-1 for the first time by the parameters optimization, which is 10 times higher than that obtained by sonication; graphene obtained has few defects, thin thickness and large size, indicating the good quality of graphene production; the conductivity of free-standing film prepared by the obtained graphene dispersion can reach 3.2 X 10(4) S.m(-1).
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收藏
页码：56 / 63
页数：8
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