Method for preparing graphene microchip material with high-pressure water jet pulverizer

A high-pressure water jet, graphene micro-chip technology, applied in graphene, chemical instruments and methods, inorganic chemistry and other directions, can solve the problems of complex preparation process, large environmental pollution, high graphene production cost, and achieve large specific surface area, The effect of stable production process and reduced production cost

CN105621405AInactive Publication Date: 2016-06-01CHENDU NEW KELI CHEM SCI CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2016-06-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the field of graphene materials, in particular to a method for preparing a graphene microchip material with a high-pressure water jet pulverizer. The method includes the steps that graphite powder is heated, pretreated and dispersed uniformly, the graphite powder collides with a target material through nozzles, with a certain diameter, of the high-pressure water jet pulverizer to be smashed, the uniformly-dispersed graphene microchip material with the layer number of 100-300 is obtained, and the graphene microchip material with the uniform layer number can be produced continuously on a large scale. The method is high in yield, low in cost and free of pollution, and the layer number meets the use requirements in the fields of rubber reinforcement, plastic reinforcement, paint corrosion prevention, lubrication and sewage treatment, which is beneficial for promoting large-scale application of graphene.
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Description

technical field

[0001] The invention relates to the field of graphene materials, in particular to a method for preparing graphene microsheet materials using a high-pressure water jet pulverizer. Background technique

[0002] Graphene is another new type of carbon nanomaterial discovered after carbon nanotubes. It is a two-dimensional carbon film with a thickness of only one atom. It is the only material composed of a single layer of atoms found so far. The carbon atoms in the middle are connected by chemical bonds to form a hexagonal network. Because the chemical bonds between carbon atoms are composed of sp2 hybrid orbitals, graphene is very tenacious, with bendable, strong electrical conductivity, good mechanical strength, and good light transmission. The excellent properties that other new materials do not have have made the preparation method of graphene attract much attention.

[0003] Chinese Invention Patent Application No. 201510096254.2 discloses a method for prepa...

Examples

Embodiment 1

[0032] A kind of method utilizing high-pressure water jet mill to prepare graphene microsheet material:

[0033] (1) Heat pretreatment of graphite powder with a weight part of 90 at a heating temperature of 150°C for a heating time of 40 minutes to obtain thermally expanded graphite powder;

[0034] (2) Add the graphite powder obtained in step (1), 1.0 parts by weight of ethanol, 0.5 parts by weight of potassium tripolyphosphate and 500 parts by weight of water into a high-speed mixer, and stir at a speed of 200 rpm during the addition process , stirring time 5min, obtain the graphite powder aqueous solution with good dispersibility;

[0035] (3) Send the well-dispersed graphite powder aqueous solution obtained in step (2) into the high-pressure storage tank of the high-pressure water jet pulverizer with a nozzle diameter of 1.7mm. Two streams of high-pressure water are sprayed at a pressure of 45MPa. The graphite powder aqueous solution passes through one of the high-pressure ...

Embodiment 2

[0038] A kind of method utilizing high-pressure water jet mill to prepare graphene microsheet material:

[0039] (1) Heat pretreatment of graphite powder with a weight part of 100 at a heating temperature of 200°C for a heating time of 60 minutes to obtain thermally expanded graphite powder;

[0040] (2) Add the graphite powder obtained in step (1), 2.0 parts by weight of ethanol, 1.5 parts by weight of potassium tripolyphosphate and water of 1000 parts by weight into a high-speed mixer, and stir at a speed of 500 rpm during the addition process , the stirring time was 25min, and the graphite powder aqueous solution with good dispersibility was obtained;

[0041] (3) Send the well-dispersed graphite powder aqueous solution obtained in step (2) into the high-pressure storage tank of the high-pressure water jet pulverizer with a nozzle diameter of 1.7mm. Two streams of high-pressure water are injected at a pressure of 60MPa. The graphite powder aqueous solution passes through o...

Embodiment 3

[0044] A kind of method utilizing high-pressure water jet mill to prepare graphene microsheet material:

[0045] (1) 94 parts by weight of graphite powder were heated and pretreated at a heating temperature of 180°C for 50 minutes to obtain thermally expanded graphite powder;

[0046] (2) Add the graphite powder obtained in step (1), 1.6 parts by weight of ethanol, 1.1 parts by weight of potassium tripolyphosphate and 680 parts by weight of water into a high-speed mixer, and stir at a speed of 450 rpm during the addition process , the stirring time was 12min, and the graphite powder aqueous solution with good dispersibility was obtained;

[0047] (3) Send the well-dispersed graphite powder aqueous solution obtained in step (2) into the high-pressure storage tank of the high-pressure water jet pulverizer with a nozzle diameter of 1.7mm. Two streams of high-pressure water are sprayed at a pressure of 50MPa. The graphite powder aqueous solution passes through one of the high-pre...