Graphene dispersion liquid and production method and application thereof

A graphene dispersion, graphene technology, applied in graphene, chemical instruments and methods, inorganic chemistry and other directions, can solve problems such as no operation method, unfavorable performance stability of graphene, and achieve good electrical conductivity and preparation. The method is simple and the effect of ensuring the integrity

Active Publication Date: 2019-08-16
哈尔滨万鑫石墨谷科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the graphene dispersant can quickly disperse graphene and prevent graphene from agglomerating for a long time, the method uses a wide variety of dispersants, which is not conducive to the stability of graphene performance
[0006] Liu Peng and others published the research progress on the uniform dispersion of graphene (Materials Herald, 2016, 30(10): 39-45), which showed that through in-situ polymerization, functionalization of graphene, modification of graphene, The method of sulfonation precipitation or grafting functional groups improves the dispersion performance of graphene, but no specific operation method is given

Method used

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  • Graphene dispersion liquid and production method and application thereof
  • Graphene dispersion liquid and production method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0053] The present embodiment provides a kind of preparation method of graphene dispersion liquid, described method comprises the steps:

[0054] (1) Mix graphene and hexadecyltrimethylammonium bromide at a mass ratio of 1:30 at 20°C to obtain surface-functionalized graphene;

[0055] (2) Mix deionized water and step (1) gained surface functionalized graphene by liquid-solid ratio 1000:1, ultrasonic 60min for the first time under 310W power, one-time adding by mass ratio 3 when ultrasonic for the first time: The surfactant that the sodium glycocholate of 1:6, sodium cocoate and coconut oil diethanolamide form, the mass ratio of the addition of surfactant and the graphene of step (1) gained surface functionalization is 4: 100, stand still for 30 minutes, and then ultrasonicate for 60 minutes for the second time under 700W power to obtain a well-mixed mixture;

[0056] (3) Centrifuge the mixed solution obtained in step (2) for 25 minutes at a rotating speed of 110r / min, collect...

Embodiment 2

[0059] The present embodiment provides a kind of preparation method of graphene dispersion liquid, described method comprises the steps:

[0060] (1) Mix graphene and hexadecyltrimethylammonium bromide at a mass ratio of 1:30 at 20°C under anaerobic conditions to obtain surface-functionalized graphene;

[0061] (2) Mix deionized water and step (1) gained surface functionalized graphene by liquid-solid ratio 1000:1, ultrasonic 60min for the first time under 310W power, one-time adding by mass ratio 3 when ultrasonic for the first time: The surfactant that the sodium glycocholate of 1:6, sodium cocoate and coconut oil diethanolamide form, the mass ratio of the addition of surfactant and the graphene of step (1) gained surface functionalization is 4: 100, stand still for 30 minutes, and then ultrasonicate for 60 minutes for the second time under 700W power to obtain a well-mixed mixture;

[0062] (3) Centrifuge the mixed solution obtained in step (2) for 25 minutes at a rotating...

Embodiment 3

[0065] The present embodiment provides a kind of preparation method of graphene dispersion liquid, described method comprises the steps:

[0066] (1) Mix graphene and hexadecyltrimethylammonium bromide at a mass ratio of 1:30 at 20°C under anaerobic conditions to obtain surface-functionalized graphene;

[0067] (2) Mix deionized water with the surface-functionalized graphene obtained in step (1) according to the liquid-solid ratio of 1000:1, and use the first ultrasound for 60 minutes at a power of 310W. The surfactant that the sodium glycocholate of ratio 3:1:6, sodium cocoate and coconut oil diethanol amide forms, and adds completely when the first ultrasonic finishes, the addition of surfactant and step (1 ) The mass ratio of the graphene of gained surface functionalization is 4:100, leave standstill 30min, then ultrasonic 60min for the second time under 700W power, obtain the mixed solution of mixing;

[0068] (3) Centrifuge the mixed solution obtained in step (2) for 25 ...

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Abstract

The invention relates to graphene dispersion liquid and a production method and application thereof. The method comprises the following steps of (1) evenly mixing graphene and hexadecyl trimethyl ammonium bromide to obtain surface-functionalization graphene; (2) mixing deionized water and the surface-functionalization graphene obtained in the step (1), during first ultrasonic treatment, adding a surfactant, and conducting second ultrasonic treatment after standing to obtain evenly-mixed mixed liquid; (3) conducting centrifugal treatment on the mixed liquid obtained in the step (2), and collecting supernatant liquid to obtain dispersion liquid; and (4) mixing sodium hydride and the dispersion liquid obtained in the step (3), under protection of inert gas, elevating temperature for reaction,and conducting cooling to obtain the graphene dispersion liquid. In the obtained graphene dispersion liquid, the graphene is evenly dispersed in the deionized water, the dispersion efficiency is high, the viscosity is as low as 4239 cps, the graphene structure is complete, the produced graphene dispersion liquid is good in conductivity, and the specific resistance is as low as 38 ohm.cm.

Description

technical field [0001] The invention belongs to the technical field of conductive materials, and relates to a graphene conductive material, in particular to a graphene dispersion and its preparation method and application. Background technique [0002] Graphene is a two-dimensional honeycomb carbon material composed of carbon atoms arranged in hexagons. between carbon atoms by sp 2 Hybrid combination, its structure is very stable. The special structure of graphene makes it have many excellent properties. Graphene is the hardest substance found so far, and has excellent mechanical properties, its theoretical specific surface area is large, it has outstanding thermal conductivity, and graphene has good electrical conductivity. At room temperature, its electron mobility is as high as 20000cm 2 / (V·s). However, the large specific surface area of ​​graphene often makes it agglomerated together, which not only reduces its own adsorption capacity but also affects the excellent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/194H01M4/62
CPCC01B32/194H01M4/625C01B2204/22Y02E60/10
Inventor 冯晓彤何斌张广明杜新伟李然
Owner 哈尔滨万鑫石墨谷科技有限公司
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