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Method for preparing large-area graphene materials by "stitching method"

A graphene, large-area technology, applied in the field of preparation of large-area graphene materials, can solve problems such as high cost, loss of function, small area, etc., and achieve the effects of prolonging life, low cost, and reducing manufacturing cost

Active Publication Date: 2021-01-19
SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in the application of metal heat conduction and anticorrosion, it is necessary to prepare functional graphene with large area, low cost and strong adhesion. However, the graphene prepared by the current research method is difficult to adhere to the metal surface, the area is small, and the cost is very high. , if graphene powder is used as a filler and simply added to the anti-corrosion coating, it will lose its function and lose the meaning of industrial application

Method used

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  • Method for preparing large-area graphene materials by "stitching method"
  • Method for preparing large-area graphene materials by "stitching method"
  • Method for preparing large-area graphene materials by "stitching method"

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Graphene oxide GO was added into a conical flask filled with diethylenetriamine at a mass ratio of 1:100. Then use an ultrasonic disperser to disperse for 40 minutes with an ultrasonic intensity of 90%, and observe the dispersion. The solution appeared as a black opaque liquid and dispersed evenly. Immediately moved it into a three-necked flask equipped with a stirring device and a distillation device. While stirring, the temperature was raised, and the reaction temperature was controlled within 120°C. The reaction time was 21 hours. After the reaction, take the reaction solution and apply it evenly on the 20# steel sheet that has been polished and cleaned in advance, cleaned and dried with absolute ethanol, and placed in an oven for 3 hours at 120°C to obtain a graphene film that is "stitched" into a continuous structure .

[0022] The organic amine used as a suture reacts with graphene oxide, and the organic amine with primary amines at both ends reacts with graphene...

Embodiment 2

[0031] Add graphene oxide GO into the Erlenmeyer flask filled with ethylenediamine at a mass ratio of 1:200. Then use an ultrasonic disperser to disperse for 60 minutes with an ultrasonic intensity of 90%, and observe the dispersion. After being uniformly dispersed, immediately transfer it to a three-necked flask equipped with a stirring device and a distillation device. Under stirring, raise the temperature, control the reaction temperature within 140°C, and the reaction time is 21 hours. After the reaction, take the reaction solution and apply it evenly on the 20# steel sheet that has been polished and cleaned in advance, cleaned and dried with absolute ethanol, and placed in an oven for 3 hours at 120°C to obtain a graphene film that is "stitched" into a continuous structure .

Embodiment 3

[0033] Add graphene oxide GO into the Erlenmeyer flask filled with diethylenetriamine at a mass ratio of 1:400. Then use an ultrasonic disperser to disperse for 55 minutes with an ultrasonic intensity of 90%, and observe the dispersion. Immediately after the dispersion is uniform, move it into a three-neck flask equipped with a stirring device and a distillation device. While stirring, raise the temperature and control the reaction temperature within 100-200°C, and the reaction time is 23h. After the reaction, take the reaction solution and apply it evenly on the 20# steel sheet that has been polished and cleaned in advance, cleaned and dried with absolute ethanol, and placed in an oven for 3 hours at 120°C to obtain a graphene film that is "stitched" into a continuous structure .

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Abstract

The invention relates to a method for preparing a large-area graphene material by adopting a suturing method. The preparation method comprises the following steps: adding graphene oxide into a conicalflask filled with one of ethylenediamine, diethylenetriamine, triethylenetetramine and paraphenylenediamine according to a mass ratio of 1 to (100 to 600); then performing dispersion for 30 to 60 minutes by using an ultrasonic dispersing machine, uniformly dispersing the solutions and instantly transferring the solutions into a three-neck flask; heating the flask while stirring, controlling a reaction temperature to be between 100 and 200 DEG C, and performing reaction for 20 to 24 hours; taking reaction solutions after the reaction is finished and uniformly coating a steel plate which is ground and smoothed in advance and is cleaned and dried by using absolute ethyl alcohol with the reaction solutions, and putting the steel plate in a baking oven to be dried for 3 hours at 120 DEG C so as to obtain a graphene film with a sutured continuous structure. According to the method disclosed by the invention, the method for suturing the micron-scale graphene oxide into the graphene film withlarge area, high heat conduction and capability of being firmly adhered on the surface of metal by utilizing a suture agent is innovatively provided.

Description

technical field [0001] The invention relates to a preparation method of a large-area graphene material, which is mainly used in the field of corrosion protection of oil and gas field exploitation, petroleum refining process, heat transfer metal equipment and pipelines of chemical enterprises operating in harsh corrosive environments. Background technique [0002] Graphene, as a new type of two-dimensional nanomaterial, its basic structural unit is a new type of two-dimensional atomic crystal composed of a single atomic layer of carbon atoms connected by sp2 hybridization. It is the most stable benzene six-membered ring in organic materials . This special structure makes it exhibit many excellent properties that existing materials do not have in terms of mechanical strength, carrier mobility, thermal conductivity, and quantum Hall effect. Especially its thermal conductivity can reach 5000w m -1 ·K -1 , 3 times that of diamond (the thermal conductivity of ultra-high thermal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/19
Inventor 黄瑾陈晓东陈君侯雯雯杨源波
Owner SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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