Graphene preparation method and mass production device

A technology of graphene and graphene powder, which is applied in the field of graphene preparation, can solve the problems of increasing the interlayer spacing of graphite powder, incapable of mass production, poor safety and environmental protection, etc., and achieve mass production problems, stable product quality, and large-scale expansion produced effect

Pending Publication Date: 2019-02-15
北京若水金枫科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

These two methods belong to the bottom-up method. Graphene can be obtained from scratch, and high-quality graphene can be obtained, but this method requires high equipment, high cost, and low output.
[0006] The mechanical exfoliation method is to use the friction and relative motion between the object and graphene to obtain a graphene thin layer material; the redox method is to oxidize natural graphite powder by using chemical reagents such as sulfuric acid and nitric acid and oxidants such as potassium permanganate. , increase the distance between graphite powder layers, insert oxides between graphite powder layers and layers to obtain graphite oxide powder (Graphite Oxide), then peel off graphite oxide powder to obtain graphene oxide, and finally Graphe

Method used

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  • Graphene preparation method and mass production device
  • Graphene preparation method and mass production device
  • Graphene preparation method and mass production device

Examples

Experimental program
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Effect test

Example Embodiment

[0051] Example 1

[0052] A graphene mass production equipment of this embodiment, such as figure 1 As shown, it includes a microwave reactor 3, a high-speed shear 6, a cleaning and drying device 7 and a graphene tank 11 connected in sequence. The microwave reactor 3 has a stirrer 4 and a microwave generator, and the microwave reactor There are two microwave tubes 5, the capacity of the microwave reactor 3 is 800L, the top is respectively connected with the graphite powder tank 1, the weak acid / weak base tank 2 and the deionized water tank 12, and the bottom outlet is connected with the inlet of the high-speed shearing machine 6. The outlet of the high-speed shear 6 is connected to the inlet of the cleaning and drying device 7, and the outlet of the cleaning and drying device 7 is connected to the circulation inlet of the microwave reactor 3 and the graphene tank 11, respectively.

[0053] The frequency of the microwave conduit 5 is 800-1200W, the stirring speed of the stirrer is 5...

Example Embodiment

[0054] Example 2

[0055] On the basis of Embodiment 1, the graphene mass production equipment of this embodiment also includes a program controller 10, such as figure 2 As shown, they are connected to the graphite powder tank 1, the weak acid / weak base tank 2, the deionized water tank 12, the microwave reactor 3, the high-speed shear 6, the cleaning and drying device 7, and the graphene tank 11. According to the product graphene layer According to the requirements, the program controller 10 sets the ratio of raw materials, wetting conditions, peeling steps and peeling conditions, and sends them to each device connected to it to automatically control its opening and closing, thereby efficiently and automatically controlling the production of graphene from graphite The whole process.

Example Embodiment

[0056] Example 3

[0057] On the basis of Embodiment 1 or 2, the graphene mass production equipment of this embodiment also includes graphene application devices, such as image 3 As shown, the graphene application device includes a graphene dispersion tank 8 and a graphene solvent tank 9, and the graphene dispersion tank 8 is connected to the graphene tank 11 and the graphene solvent tank 9 respectively. The dried graphene and the solvent liquid enter the graphene dispersion tank 8 separately for stirring, and are dispersed into graphene slurry, which is used for conductive slurry, graphene coating, and the like. In addition, when the program controller 10 is included, the graphene dispersion tank 8 and the graphene solvent tank 9 are respectively connected to the program controller 10, and the above process is automatically performed by the program control.

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Abstract

The invention discloses a graphene preparation method and a mass production device. The graphene preparation method comprises the following steps: adding graphite powder, a weak acid or a weak alkaliand water into a microwave reaction kettle, stirring, and wetting to obtain a graphite turbid liquid; carrying out microwave peeling in the microwave reaction kettle, carrying out mechanical peeling in a mechanical peeling device, circulating microwave and/or mechanical peeling according to demands to obtain a graphene turbid liquid; carrying out suction filtration, washing and drying by using a cleaning and drying device to obtain graphene powder, wherein the weak acid or the weak alkali is one or more of tannic acid, sodium gluconate and hydrogen peroxide; the ratio of the graphite powder tothe weak acid or the weak alkali to the water is (1-10g):(0.1-1g):(0.5-1L); and the temperature of mechanical peeling is 60 DEG C or less. No strong acid, strong alkali or strong oxidant is needed tobe introduced to oxidize or intercalate graphite/graphene; raw materials are safe and environmentally-friendly, wide in source and low in cost; no waste acid, wastewater, waste gas or pollution is generated in the preparation process, in addition, on-scale production is achieved, and the equipment cost is low.

Description

Technical field [0001] The invention relates to the technical field of preparing graphene, in particular to a fast and environmentally friendly preparation method and mass production device of graphene. Background technique [0002] Graphene is a kind of sp 2 The hybrid orbitals are composed of hexagonal two-dimensional carbon nanomaterials with honeycomb lattices, which have excellent optical, electrical and mechanical properties, and have important application prospects in materials science, micro-nano processing, energy, biomedicine, and drug delivery. It is considered to be a revolutionary material in the future. [0003] The physicists Andre Gaim and Konstantin Novoselov of the University of Manchester in the United Kingdom successfully separated graphene from graphite powder by using the micromechanical exfoliation method, and thus jointly won the 2010 Nobel Prize in Physics. [0004] The common production methods of graphene are SiC epitaxial growth method, chemical vapor dep...

Claims

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Application Information

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IPC IPC(8): C01B32/19
CPCC01B32/19
Inventor 慕雷
Owner 北京若水金枫科技有限公司
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