Preparation method and application of aminated graphene film

A technology of aminated graphene and graphene, applied in chemical instruments and methods, separation methods, adsorption water/sewage treatment, etc., can solve problems such as inability to achieve large-scale production, difficulty, and in the laboratory research stage

Inactive Publication Date: 2015-04-29
NANJING XINYUE MATERIAL SCI & TECH +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Due to its unique spatial structure, two-dimensional graphene film can theoretically achieve a series of green and environmental goals such as seawater desalination and seawater power generation. The existing preparation methods of graphene film include spin coating, chemical vapor deposition and other methods, but due to these The graphene films prepared by this method are all in the laboratory research stage, and cannot achieve large-scale industrial production, and it is more difficult to apply them to daily life.

Method used

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  • Preparation method and application of aminated graphene film
  • Preparation method and application of aminated graphene film
  • Preparation method and application of aminated graphene film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of graphite oxide

[0031] Add 1 g of graphite to 100 ml of concentrated H 2 SO 4 (98%) solution, stirred in an ice bath for 30 min, then slowly added 1 g of potassium persulfate and 1.5 g of phosphorus pentoxide, stirred in an ice bath for 30 min; then reacted the solution in an oil bath at 80°C for 5 h, and Slowly transfer the solution to 300ml of distilled water, suction filter, and dry; put the dried pre-oxidized graphite in a dry beaker, add 100ml of concentrated sulfuric acid, stir in an ice bath, slowly add 4g of potassium permanganate, and stir for 30min Then put it in an oil bath at 35°C for 2 hours, slowly pour the reaction solution into 300ml distilled water, stir, cool for 1 hour, then slowly add 10ml hydrogen peroxide (30%) to the solution to obtain an orange-yellow solution; then add 500ml 5% HCl solution, let stand for 3h and pour out the supernatant to remove metal ions; then centrifuge and wash with deionized water to remove excess aci...

Embodiment 2

[0040] The preparation method of GO was the same as that in Example 1. Dried dimethylamide (DMF) with molecular sieves treated at 400°C for 2 hours for 2 hours, weighed 1 g of GO and dissolved it in the DMF solution to prepare a solution with a concentration of 50 mg / ml, and ultrasonically Disperse GO evenly; then invert the solution into a 250ml two-necked flask, add 1.5 g of dicyclohexylcarbodiimide, and stir the solution at 80°C for 10 h; then raise the temperature of the solution to 170°C, and evaporate the SO in the solution 2 and HCl gas, after the solution was cooled to 150°C, 1.5 g of 4-4-methine-bis(2-chloroaniline) was added to react for 36 h; then the solution was poured into ethanol and left to stand, and washed with deionized water by centrifugation product, and then put the product in a rotary evaporator and spin dry at 90°C to obtain graphene oxide grafted 4-4-methine-bis(2-chloroaniline).

[0041] The solution was prepared according to the mass ratio of 4-4-met...

Embodiment 3

[0044] The preparation method of GO is the same as that in Example 1. Dimethylamide (DMF) was dried with molecular sieves treated at 350°C for 2 hours for 3 hours, and 1 g of GO was weighed and dissolved in DMF solution to prepare a solution with a concentration of 20 mg / ml, and ultrasonically Disperse GO evenly; then invert the solution into a 250ml two-necked flask, add 0.75 g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, and stir the solution at 70°C for 4 h ; Then the solution was heated to 120°C, and the SO in the solution was evaporated 2 and HCl gas, after the solution was cooled to 80°C, 0.8 g of 4,4-bis(4-aminophenoxy)biphenyl was added to react for 18 h; then the solution was poured into ethanol and left to stand, then centrifugally washed with deionized water product, and then the product is placed in a rotary evaporator, and spin-dried at 80°C to obtain graphene oxide grafted 4,4-bis(4-aminophenoxy)biphenyl.

[0045] Prepare the solution accordin...

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Abstract

The invention belongs to the field of film preparation and in particular relates to a preparation method and application of an aminated graphene film. According to the specific technical scheme, the method comprises the following steps: performing pre-activating treatment on carboxyl groups on graphene oxide, and carrying out a chemical reaction between the activated carboxyl group and an amino compound, so that amino is grafted to the graphene oxide; and performing suction filtration to prepare the aminated graphene film. The aminated film is applied to the fields of inorganic salt ion adsorption, sea water desalination and the like by utilizing the adsorptive action between positive charges of the amino on the film and inorganic salt negative ions and the adsorptive action between negative charges on the graphene oxide and positive ions. In addition, a reaction can be carried out between the amino on the film and CO2 gas, so that the film can be applied to capturing CO2 gas in flue gas in cement or power industry.

Description

technical field [0001] The invention belongs to the field of film preparation, and in particular relates to a preparation method and application of an aminated graphene film. Background technique [0002] Due to its unique spatial structure, two-dimensional graphene film can theoretically achieve a series of green and environmental goals such as seawater desalination and seawater power generation. The existing preparation methods of graphene film include spin coating, chemical vapor deposition and other methods, but due to these The graphene films prepared by this method are all in the stage of laboratory research, and cannot be mass-produced in industry, and it is more difficult to apply them to daily life. In view of the difficulty in the preparation of large-scale graphene films and the current in-depth research on graphene oxide by click chemistry, the preparation of films by functionalizing graphene oxide is a current research hotspot. Therefore, the present invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B01D53/02C02F1/28C02F103/08
CPCY02C20/40Y02P20/151
Inventor 闵永刚莫申斌童宋照王剑杨文斌刘屹东
Owner NANJING XINYUE MATERIAL SCI & TECH
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