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Method for reducing graphene agglomeration

A graphene and graphene powder technology, applied in the field of graphene, can solve the problems of low physical and chemical properties, limited application, easy agglomeration of graphene, etc., and achieve low agglomeration, good application prospects, and the effect of reducing agglomeration

Pending Publication Date: 2021-02-26
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Graphene has huge application prospects, so it is urgent to find a high-quality, less-polluted, and easy-to-prepare method to meet the current booming application needs of graphene. Physical method is the main method. Because graphene has a large specific surface area, graphene is easy to agglomerate
As a result, its physical and chemical properties are much smaller than the theoretical value, which limits its practical application

Method used

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  • Method for reducing graphene agglomeration
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  • Method for reducing graphene agglomeration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Weigh 25 g of powdered graphene obtained by the high-pressure liquid phase exfoliation method, weigh 0.75 g of antioxidant 702 in a small beaker, add 10 mL of ethanol to dissolve, and add the resulting solution to the powdered graphene.

[0023] (2) Weigh 975g of water, add it into the graphene, and stir at a constant speed with a stirrer at a speed of 450rpm / min for 5min.

[0024] (3) Pour the stirred suspension into a homogenizer, set the homogenizer to a pressure of 600 bar, and perform two cycles for about 15 minutes.

[0025] (4) Spray drying the homogenized suspension to obtain the desired graphene. When spray drying, the inlet temperature is 160°C and the wind speed is 120m 2 / h, peristaltic speed 450ml / h.

Embodiment 2

[0027] (1) Weigh 25 g of powdered graphene obtained by high-pressure liquid phase exfoliation method, weigh 1.25 g of antioxidant 702 in a small beaker, add 17 mL of ethanol to dissolve, and add the resulting solution to the powdered graphene.

[0028] (2) Weigh 975g of water, add it into the powdered graphene, and stir at a constant speed with a stirrer at a speed of 450rpm / min for 5min.

[0029] (3) Pour the stirred suspension into a homogenizer, set the homogenizer to a pressure of 600 bar, and cycle for about 8 minutes.

[0030] (4) Spray drying the homogenized suspension to obtain the desired graphene. When spray drying, the inlet temperature is 160° and the wind speed is 120m 2 / h, peristaltic speed 450ml / h.

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Abstract

The invention provides a method for reducing graphene agglomeration, which comprises the following steps: adding a modifier into graphene powder, adding water, uniformly stirring, homogenizing by a homogenizer, and carrying out spray drying on the obtained turbid liquid to obtain the required graphene. The graphene treated by the method disclosed by the invention has the advantage of low agglomeration, and meanwhile, the method disclosed by the invention is a low-cost preparation method and has a relatively good application prospect.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to a method for reducing graphene agglomeration. Background technique [0002] Graphene is a two-dimensional material with a hexagonal honeycomb structure composed of carbon atoms in planar hybrid orbitals and only a single carbon atom thick. It is one of the thinnest and hardest nanomaterials known in the world. [0003] Graphene has huge application prospects, so it is urgent to find a high-quality, less-polluted, and easy-to-prepare method to meet the current booming application needs of graphene. The physical method is the main method. Because graphene has a large specific surface area, graphene is easy to agglomerate. As a result, its physical and chemical properties are much smaller than the theoretical value, which limits its practical application. Contents of the invention [0004] In view of the above-mentioned problem that graphene is prone to agglomeration during the...

Claims

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Application Information

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IPC IPC(8): C01B32/194
CPCC01B32/194
Inventor 张诚罗俊涛刘军磊许林铁
Owner ZHEJIANG UNIV OF TECH
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