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Method for preparing ionic liquid functionalized graphene material

A technology of ionic liquid and graphene, which is applied in the field of preparation of graphene materials, can solve problems such as poor solubility, achieve good dispersion, and the effect of simple and easy method

Inactive Publication Date: 2011-03-16
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Common graphene materials have poor solubility in both inorganic and organic solvents, making the dispersion of graphene materials in various solvents or how to disperse them better becomes a difficult problem

Method used

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  • Method for preparing ionic liquid functionalized graphene material
  • Method for preparing ionic liquid functionalized graphene material
  • Method for preparing ionic liquid functionalized graphene material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] According to the ratio of graphene oxide mass mg: secondary water volume ml: ionic liquid mass g: ionic liquid mass g ratio of 1: 4: 0.5, 5.0 mg of graphene oxide is dispersed in 20 ml of secondary water, 90 ° C ultrasonic Disperse for 1 hour, and centrifuge at 5000 rpm to remove undispersed oxides to obtain a yellow solution. Weighed 2.5 mg of 1-(3-aminopropyl)-3-methylimidazole bromide and dissolved it in the above mixture, and subjected to ultrasonic reaction at 20° C. for 10 hours to obtain a black dispersion. The above dispersion was centrifuged at 6000 rpm, and the centrifuged solid was washed with secondary water until the filtrate was neutral, and then vacuum-dried at 60° C. overnight to obtain an ionic liquid-functionalized graphene material.

Embodiment 2

[0015] According to the ratio of graphene oxide mass mg: secondary water volume ml: ionic liquid mass g: 1: 4: 1, 5.0 mg graphene oxide was dispersed in 20 ml secondary water, and ultrasonically dispersed at 80 ° C for 2 hours. Undispersed oxides were removed by centrifugation at 5000 rpm to obtain a yellow solution. 5 mg of 1-(3-aminopropyl)-3-methylimidazole bromide was weighed and dissolved in the above mixture, and subjected to ultrasonic reaction at 30° C. for 10 hours to obtain a black dispersion. The above dispersion was centrifuged at 7000 rpm, and the centrifuged solid was washed with secondary water until the filtrate was neutral, and then vacuum-dried at 60° C. overnight to obtain an ionic liquid-functionalized graphene material.

Embodiment 3

[0017] According to graphene oxide mass mg: secondary water volume ml: ionic liquid mass g: the proportioning ratio is 1:4:2, 5.0mg graphene oxide is dispersed in 20ml secondary water, 70 ℃ ultrasonic dispersion 4 hours, Undispersed oxides were removed by centrifugation at 5000 rpm to obtain a yellow solution. 10 mg of 1-(3-aminopropyl)-3-methylimidazole bromide was weighed and dissolved in the above mixture, and subjected to ultrasonic reaction at 40° C. for 9 hours to obtain a black dispersion. The above dispersion was centrifuged at 8000 rpm, and the centrifuged solid was washed with secondary water until the filtrate was neutral, and then vacuum-dried at 60° C. overnight to obtain an ionic liquid-functionalized graphene material.

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Abstract

The invention discloses a method for preparing an ionic liquid functionalized graphene material. The graphene material is prepared by a chemical method which comprises the following steps: carrying out ultrasonic dispersion on the graphene oxides in the secondary water, removing a handful of non-dispersed oxides through centrifugation to obtain yellow colloid solution, weighing certain amount of ionic liquid with terminal group of -NH2 and dissolving the ionic liquid in the above mixed liquid, carrying out heating and ultrasonic treatment to obtain black dispersion and filtering, washing and drying the black dispersion to obtain the ionic liquid functionalized graphene material. The method is simple, convenient and practicable and the obtained graphene material has better dispersibility and dissolubility in numerous organic and inorganic solvents.

Description

technical field [0001] The invention discloses a preparation method of an ionic liquid functionalized graphene material. The graphene material functionalized by the ionic liquid is prepared by a chemical method. Background technique [0002] At the beginning of the development of the chemical industry in the 20th century, liquid solvents such as benzene, toluene, and methylene chloride became common industrial solvents. However, their large volatility and narrow liquid temperature range greatly limit the development of the chemical industry, and they have considerable volatility, which is likely to cause great negative effects, such as global climate change, urban air quality deterioration, cause human disease, etc. The emergence of ionic liquids is a new revolution in the way of using solvents and the way of thinking. Ionic liquid is an excellent organic solvent, which can widely dissolve polar and non-polar organic and inorganic substances, and has excellent characteris...

Claims

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Application Information

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IPC IPC(8): C01B31/04
Inventor 牛利杨化锋韩冬雪邓鹏飏范立双张齐贤
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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