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Amidation modified graphene oxide and preparation method and application thereof

An amidation and stone oxide technology, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of high equipment and process operation requirements, harsh reaction conditions, etc., to improve physical barrier ability, simple and convenient operation , reduce the effect of van der Waals force

Active Publication Date: 2018-12-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation reaction experiment of the main product functionalized graphene oxide needs to be carried out under the protection of nitrogen gas and at a higher temperature (150-200°C). The reaction conditions are relatively harsh, and the requirements for equipment and process operations are relatively high.

Method used

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  • Amidation modified graphene oxide and preparation method and application thereof
  • Amidation modified graphene oxide and preparation method and application thereof
  • Amidation modified graphene oxide and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of amidation modified graphene oxide (fGO), adopts following technical scheme to prepare:

[0030] Dissolve graphene oxide in ethanol, the concentration of graphene oxide in ethanol is 1mg / mL; 100W power ultrasonic treatment for 1 hour to fully disperse graphene oxide, and then transfer it to a round bottom flask. Weigh 2-aminobenzimidazole, slowly add it to the graphene oxide suspension, the optimal mass ratio of graphene oxide to 2-aminobenzimidazole is 1:10; magnetically stir at 65°C and heat for 48 hours to obtain Uniformly dispersed black suspension; cooled to room temperature, suction filtered, and repeatedly washed with ethanol; the obtained filter cake was placed in a vacuum drying oven, and vacuum-dried at 50°C for 24 hours to obtain amidated modified graphene oxide.

Embodiment 2

[0032] A kind of amidation modified graphene oxide (fGO), adopts following technical scheme to prepare:

[0033] Dissolve graphene oxide in DMF, the concentration of graphene oxide in DMF is 2mg / mL; 120W power ultrasonic treatment for 1 hour to fully disperse graphene oxide, and then transfer it to a round bottom flask. Weigh 2-aminobenzimidazole, slowly add it into the graphene oxide suspension, the optimal mass ratio of graphene oxide to 2-aminobenzimidazole is 1:8; magnetically stir at 70°C for 38 hours and heat to react to obtain Uniformly dispersed black suspension; cooled to room temperature, suction filtered, and repeatedly washed with ethanol; the obtained filter cake was placed in a vacuum drying oven, and vacuum-dried at 45°C for 24 hours to obtain amidated modified graphene oxide.

Embodiment 3

[0035] A kind of amidation modified graphene oxide (fGO), adopts following technical scheme to prepare:

[0036] Dissolve graphene oxide in ethanol, the concentration of graphene oxide in ethanol is 0.5mg / mL; 100W power ultrasonic treatment for 1 hour to fully disperse graphene oxide, and then transfer it to a round bottom flask. Weigh 2-aminobenzimidazole, slowly add it into the graphene oxide suspension, the optimal mass ratio of graphene oxide and 2-aminobenzimidazole is 1:12; magnetically stir at 60°C and heat for 40 hours to obtain Uniformly dispersed black suspension; cooled to room temperature, suction filtered, and repeatedly washed with ethanol; the obtained filter cake was placed in a vacuum drying oven, and vacuum-dried at 50°C for 24 hours to obtain amidated modified graphene oxide.

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Abstract

The invention discloses amidation modified graphene oxide and a preparation method and application thereof. The preparation method comprises the following steps: dissolving graphene oxide in an organic solvent, and carrying out ultrasonic treatment for 1 hour to enable the graphene oxide to be dispersed fully; weighing 2-aminobenzimidazole, slowly adding the 2-aminobenzimidazole in suspension liquid of the graphene oxide, and reacting for 36-48 hours under magnetic stirring and heating; cooling to a room temperature and then carrying out suction filtration, and washing repeatedly; placing an obtained filter cake in a vacuum drying box, and drying for 24 hours under vacuum to obtain the amidation modified graphene oxide. In a preparation process of the amidation modified graphene oxide, over-high requirements to equipment do not exist, technological conditions are conventional, the process is simple and convenient to operate, the amidation modified graphene oxide is suitable for a composite filling material of an anti-corrosion coating, and the corrosion resistance of the coating can be improved remarkably.

Description

technical field [0001] The invention relates to amidated modified graphene oxide and its preparation method, as well as its application in epoxy coating, belonging to the field of graphene and coating preparation. Background technique [0002] Corrosion is a serious but unavoidable problem, causing huge economic losses. Therefore, people use various methods to reduce the corrosion rate, and applying a coating on the metal surface is a typical corrosion protection method. Due to its excellent stability, wear resistance and low price, epoxy resin is currently an organic coating widely used to reduce metal corrosion, but it also has disadvantages such as high brittleness, insufficient strength and toughness. So researchers try to add various filler materials to enhance the corrosion resistance of epoxy resin. [0003] Since the discovery of graphene in 2004, it has gradually become a research hotspot in various fields because of its excellent properties in mechanical, optical...

Claims

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Application Information

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IPC IPC(8): C01B32/198C09D163/00C09D5/08
CPCC09D163/00C01B32/198C09D5/08
Inventor 牛林于倩徐文东赵容萱
Owner SHANDONG UNIV
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