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Three dimensional graphene oxide foamed material preparation method through natural drying of solution

A technology of graphene foam and natural drying, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of in-situ molding preparation, long preparation cycle, difficult operation, etc., and achieve low cost and short cycle , Environmentally friendly effect

Active Publication Date: 2019-01-15
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the shortcomings of the current three-dimensional graphene oxide foam material and three-dimensional graphene foam material preparation methods, such as large power consumption, high cost, difficult operation, long preparation cycle and in-situ molding preparation, the present invention provides a solution for natural drying preparation A method for a three-dimensional graphene oxide foam material, which mainly involves stirring and foaming a high-concentration graphene oxide solution containing a surfactant, and then coating it on a substrate and directly drying it naturally to obtain a three-dimensional graphene oxide foam material

Method used

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  • Three dimensional graphene oxide foamed material preparation method through natural drying of solution

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Effect test

Embodiment 1

[0029] (1) 10 mL mass fraction of 20% alkyl glycoside (2 g) solution is added to 90 mL concentration of graphene oxide aqueous solution (average particle diameter of graphene oxide is 10 μm) of 16 mg / mL, first with 100 r / min Stir at a slow speed for 2 minutes to mix the alkyl glucoside solution and the graphene oxide aqueous solution evenly, then stir and foam at a speed of 2500r / min, stir for 5 minutes so that the volume of the solution after foaming is 2.0 times the volume of the solution before foaming, and obtain a foam Bubbled graphene oxide viscous solution;

[0030] (2) adopt scraping method to tile the graphene oxide viscous solution of foaming on the aluminum plate base, and the average thickness of the graphene oxide viscous solution of the foaming of the substrate is 5mm, then naturally dry, in A three-dimensional graphene oxide foam material with a thickness of 2.3mm is obtained on the substrate;

[0031] (3) spread the foamed graphene oxide viscous solution prepa...

Embodiment 2

[0036] (1) Add 10 mL of alkyl glycoside solution with a mass fraction of 20% to 90 mL of graphene oxide aqueous solution (average particle size of graphene oxide is 15 μm) with a concentration of 12 mg / mL, and stir slowly at a speed of 100 r / min Mix the alkyl glucoside solution and the graphene oxide aqueous solution evenly for 2 minutes, then stir and foam at a speed of 2500r / min, stir for 5 minutes so that the volume of the solution after foaming is 2.0 times the volume of the solution before foaming, and obtain the foamed oxide Graphene viscous solution;

[0037] (2) adopt scraping method to tile the graphene oxide viscous solution of foaming on the aluminum plate substrate, and the average thickness of the graphene oxide viscous solution of the foaming of substrate is 3mm, then naturally dry, in A three-dimensional graphene oxide foam material with a thickness of 1.5mm is obtained on the substrate.

[0038] The prepared three-dimensional graphene oxide foam material was c...

Embodiment 3

[0040] (1) Add 8 mL of alkyl glycoside solution with a mass fraction of 20% to 72 mL of graphene oxide aqueous solution (average particle size of graphene oxide is 10 μm) with a concentration of 16 mg / mL, and stir slowly at a speed of 100 r / min Mix the alkyl glucoside solution and the graphene oxide aqueous solution evenly for 2 minutes, then stir and foam at a speed of 2500r / min, stir for 5 minutes so that the volume of the solution after foaming is 2.5 times the volume of the solution before foaming, and obtain the foamed oxide Graphene viscous solution;

[0041] (2) adopt scraping method to tile the graphene oxide viscous solution of foaming on the aluminum plate base, and the average thickness of the graphene oxide viscous solution of the foaming of the substrate is 5mm, then naturally dry, in A three-dimensional graphene oxide foam material with a thickness of 2.7 mm was obtained on the substrate.

[0042] The prepared three-dimensional graphene oxide foam material was c...

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Abstract

The invention relates to a three dimensional graphene oxide foamed material preparation method through natural drying of a solution, and belongs to the technical field of graphene based three dimensional material preparation. According to the method, a high concentration graphene oxide solution containing a surfactant is stirred and foamed, and then the solution is painted on a substrate and naturally dried in the air to obtain a three dimensional graphene oxide foamed material. The method has the advantages of simple operation, low cost, environmental friendliness, and in-situ preparation, and is suitable for industrial large scale continuous production of the three dimensional graphene oxide foamed material. The prepared three dimensional graphene oxide foamed material is composed of a large amount of irregular hollow graphene oxide micro spheres that are connected to each other; has an enclosed pore structure and small density, and can be used as a precursor for the preparation of agraphene based three dimensional foamed material.

Description

technical field [0001] The invention specifically relates to a method for directly drying a foamed graphene oxide viscous solution to prepare a three-dimensional graphene oxide foam material, and belongs to the technical field of graphene-based three-dimensional material preparation. Background technique [0002] Graphene oxide is an intermediate product of graphene prepared from graphite through the oxidation exfoliation method. Its surface is rich in oxygen-containing groups and can be stably dispersed in a single layer in aqueous solution. It has chemical reactivity and solution processing performance that graphene cannot match. It has obvious advantages in the preparation, functionalization and application of graphene-based materials. The three-dimensional graphene oxide foam material is a macroscopic lightweight foam material with a three-dimensional porous structure assembled by a large number of two-dimensional graphene oxide nanosheets. The three-dimensional graphen...

Claims

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Application Information

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IPC IPC(8): C01B32/198
CPCC01B32/198C01B2204/32
Inventor 曲良体杨洪生牟应科
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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