• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The method comprises the steps of: providing a plurality of graphite blocks (10) each having a plurality of stacked graphene layers (11), a bond formed by a van der Waals force existing between each two layers of graphene (11); applying a shear air flow (24) produced by an air flow interface (23) formed between a first flow path (21) and a second flow path (22) by an air flow direct (20a) and reverse airflow (20b) on the graphite blocks (10), the shear airflow (24) having sufficient energy to damage the van der Waals force in order to disengage a part layers of graphene (11); and collecting a plurality of pieces of graphene platelets (30), the graphene platelets (30) comprising one or more layers of graphene (11).
    公开号:FR3028849A1
    申请号:FR1551884
    申请日:2015-03-05
    公开日:2016-05-27
    发明作者:Yu-Hong Lin；Chun-Hsien Tsai；Ting-Chuan Lee；Chun-Jung Tsai
    申请人:Taiwan Carbon Nanotube Co Ltd；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a method of manufacturing graphene wafers, and in particular to a method of manufacturing graphene wafers by a flow of air. Graphene is an allotrope of carbon, and is a two-dimensional material formed by carbon atoms in a hexagonal honeycomb lattice arrangement. From the material perspectives, since graphene has the characteristics of being transparent and of having high electrical conductivity, high thermal conductivity, high strength to weight ratio and good ductility, graphene has good properties. potential for development. U.S. Patent Application Publication No. 2010/0237296 discloses a conventional method of making graphene, "Reducing Graphene Oxide to Graphene in High-boiling Point Solvents". A single graphene oxide sheet is dispersed in water to obtain a dispersion, and a solvent is added to the dispersion to form a solution. The solvent may be N-methylpyrrolidone, ethylene glycol, glycerol, dimethylpyrrolidone, acetone, tetrahydrofuran, acetonitrile, dimethylformamide, an amine or an alcohol. The solution is then heated to about 200 ° C and purified to obtain a single graphene sheet. In addition, U.S. Patent Publication No. 2010/0323113 discloses a method for synthesizing graphene. In the above disclosure, a hydrocarbon is maintained at an elevated temperature of 40 ° C to 1000 ° C, and carbon atoms are implanted in a substrate. The substrate can be made of a metal or an alloy. As the temperature decreases, the carbon deposits to diffuse out of the substrate to form a layer of graphene.
    [0002] The above graphene manufacturing processes not only have complicated processes but also slow production rates, so that production can not be increased effectively. Therefore, there is a need for a solution that improves such problems. A main object of the present invention is to solve the problems of complicated processes, slow manufacturing speeds and inefficient production of conventional methods for the manufacture of graphene.
    [0003] In order to achieve this objective, the present invention provides a method of manufacturing graphene. The method comprises the following steps: In Step 1, a plurality of graphite blocks are provided. Each of the graphite blocks comprises a plurality of stacked graphene layers. A bond is formed between two successive layers of graphene by a van der Waals force. In Step 2, the graphite blocks are placed in a chamber, and a direct airflow and a reverse airflow are introduced into the chamber. The direct air flow forms a first flow path in the chamber, and the reverse air flow forms a second flow path in the chamber. An airflow interface is formed between the direct airflow and the reverse airflow.
    [0004] In Step 3, a shear airflow produced by the airflow interface is applied to the graphite blocks. The shear airflow has sufficient energy to damage the van der force so that a portion of the graphene layers disengage. In Step 4, a plurality of pieces of graphene platelets disengaged from the graphite blocks is collected. The graphene platelets comprise one or more of the graphene layers. As such, in the present invention, the shear air flow produced by the airflow interface is applied to the graphite blocks, so that the graphene layers disengage the graphite blocks to form graphene platelets. Thus, the present invention provides a simple manufacturing method and further enhances large scale production at a rapid rate.
    [0005] The term "airflow" should be understood to mean more generally "gas flow" as will become apparent hereinafter. The present invention therefore relates to a process for manufacturing graphene platelets, characterized in that it comprises: Step 1: obtain a plurality of graphite blocks, each of the graphite blocks comprising a plurality of graphene layers stacked, a bond formed by a van der Waals force existing between two successive graphene layers; Step 2: Place the graphite blocks in a chamber, and introduce a direct air flow and a reverse air flow into the chamber, the direct air flow forming a first flow path in the chamber, the inverse air flow forming a second flow path in the chamber, an airflow interface forming between the first flow path and the second flow path; Step 3: Apply a shear air flow produced by the air flow interface to the graphite blocks, the shear airflow having sufficient energy to damage the van der Waals force to disengage a portion layers of graphene; and Step 4: collect a plurality of pieces of graphene platelets, the graphene platelets comprising one or more of the graphene layers. In Step 2, the graphite blocks may be placed in the chamber of an airflow generating device, the airflow generating device including a first inlet for receiving the direct airflow. and being in communication with the chamber, a second inlet for receiving the reverse airflow and being in communication with the chamber, and an airflow outlet in communication with the chamber, the airflow interface applying the shear airflow to the graphite blocks in the chamber. In Step 3, the airflow generating device may further comprise a collection portion, in which the disengaged graphene layers fall. In Step 4, the collection portion can collect the graphene platelets. In Step 2, the direct airflow may be selected from the group consisting of air, dry air, nitrogen (N2), argon (Ar), helium (He), hydrogen (H2), oxygen (02) and ammonia (NH3). In Step 2, the reverse airflow may be selected from the group consisting of air, dry air, nitrogen (N2), argon (Ar), helium (He), hydrogen (H2), oxygen (O2) and the like. ) and ammonia (NH3). In Step 3, a flow rate of the shear airflow may be between 1 m / s and 200 m / s.
    [0006] In Step 3, the energy may be at least greater than 0.1 kJ / mol. The energy can be between 0.1 kJ / mol and 5 kJ / mol. The graphene platelets can have a diameter between 5 nm and 1000 μm. The foregoing and other objects, features and advantages of the invention will become apparent upon reading the following detailed description with reference to the accompanying drawings.
    [0007] In these drawings: - Figure 1 is a schematic diagram of steps according to an embodiment of the present invention; Figure 2 is a schematic diagram of the use of an airflow generating device according to an embodiment of the present invention; Figure 3A is a first schematic diagram of a shear airflow according to an embodiment of the present invention; Figure 3B is a second schematic diagram of a shear airflow according to an embodiment of the present invention.
    [0008] Figure 1 shows a schematic diagram of steps according to an embodiment of the present invention. Figure 2 shows a schematic diagram according to an embodiment of the present invention. Referring to Figure 1 and Figure 2, it can be seen that a method of manufacturing graphene platelets of the present invention comprises the following steps. In Step 1, a plurality of graphite blocks 10 are provided. The graphite blocks 10 are formed by graphene. Graphene is an allotrope of carbon. Structurally, each carbon atom is bonded to three other surrounding carbon atoms to present a honeycomb arrangement with multiple hexagons. In the embodiment, the size of the graphite blocks 10 may consist of grains or blocks having a length, a width and a height each of between 10 nm and 1000 μm. Each of the graphite blocks 10 comprises a plurality of stacked graphene layers 11. A van der Waals force forms a bond between two successive graphene layers 11. In Step 2, the graphite blocks 10 are placed in a chamber 43, and a direct air flow 20a and a reverse air flow 20b are introduced into the chamber 43. The direct air flow 20a forms a first flow path 21 in the chamber 43, and the Reverse air flow 20b forms a second flow path 22 in the chamber 43. An air flow interface 23 is formed between the first flow path 21 and the second flow path 22. In the In this embodiment, a configuration of the chamber 43 is illustrated by taking an airflow generating device 40 as an example. The air flow generation device 40 comprises a first inlet 41a, a second inlet 41b, an air flow outlet 42 and the chamber 43. The first inlet 41a receives the direct airflow 20a entering the chamber 43 and is in communication with the chamber 43. The second inlet 41b receives the reverse air flow 20b entering the chamber 43 and is in communication with the chamber 43. The airflow outlet 42 is in communication with the chamber 43. After having entered the chamber 43 by the first inlet 41a and the second inlet 41b respectively, the direct air flow 20a and the reverse air flow 20b respectively form the first flow path 21 and the second flow path 22 in the chamber. In addition, the air flow interface 23 is formed between the first flow path 21 and the second flow path 22. The direct air flow 20a and the reverse air flow 20b can be gases such as air, dry air, nitrogen (N2), argon (Ar), helium (He), hydrogen (H2), oxygen (02) and ammonia (NH3). The gases used by the direct air flow 20a and the reverse air flow 20b may be identical or different.
    [0009] In Step 3, a shear airflow 24 produced by the airflow interface 23 is applied to the graphite blocks 10. The shear airflow 24 has sufficient energy to damage the force. of van der Waals to disengage a portion of the graphene layers 11. Referring to Fig. 3A and Fig. 3B, it can be seen that Fig. 3A shows a first schematic diagram of a flow of shear air of the present invention. Figure 3B shows a second schematic diagram of a shear airflow of the present invention. The associated details are given below. As shown in Fig. 3A, when the flow directions of the first flow path 21 and the second flow path 22 are non-aligned, the shear air flow 24 produced by the flow interface Air 23 is dispensed to two opposite sides of the airflow interface 23 and is capable of pulling the graphite blocks 10. As shown in FIG. 3B, when the flow directions of the first flow path 21 and the second flow path 22 face each other, the shear air flow 24 produced by the air flow interface 23 directly faces a central portion of the air flow interface 23 to 10 In the present invention, the shear air flow 24 has a swirling speed between 1 m / s and 200 m / s, and generates an energy greater than 0.1 kJ / mole. . In one embodiment of the present invention, preferably, the energy is between 0.1 kJ / mole and 5 kJ / mole. As such, the shear airflow 24 damages the van der Waals force when it acts on the graphite blocks 10 in the chamber 43, so that a portion of the graphene layers 11 bonded together by the van der Waals force disengages the graphite blocks 10. In addition, part of the direct air flow 20a and the reverse air flow 20b leaves the chamber 43 through the airflow outlet 42. In Step 4, a plurality of pieces of graphene platelets 30 disengaged from the graphite blocks 10 is collected. The graphene wafers 30 comprise one or more of the graphene layers 11. Continuing the description of Step 3, in the embodiment, the air flow generating device 40 may further comprise a portion of The collection portion 44 is in communication with the chamber 43, so that the graphene layers 11 disengaged from the graphite blocks 10 are caused to fall into the collection portion 44 from the chamber 43 and to be collected to obtain accordingly the graphene platelets 30 comprising one or more of the graphene layers 11. The graphene platelets 30 may comprise 1 to 3,000,000 layers of the graphene layers 11, and have a diameter between 5 nm and 1000 pm. The above values should be considered as examples to explain the present invention, and should not be construed as limitations of the present invention. In conclusion, in the present invention, the shear air flow produced by the direct airflow and the reverse airflow at the airflow interface is applied to the graphite blocks. The van der Waals force which forms a bond between the graphene layers is damaged by the energy of the shear air flow in order to disengage the graphene layers from the graphite blocks to form the graphene platelets in large amounts. . Thus, the present invention provides a simple manufacturing process and further improves large scale production at a rapid rate.
    权利要求:
    Claims (4)
    [0001]
    CLAIMS1 - A process for producing graphene wafers (30), characterized in that it comprises: Step 1: obtain a plurality of graphite blocks (10), each of the graphite blocks (10) comprising a plurality of stacked graphene layers (11), a bond formed by a van der Waals force existing between two successive graphene layers (11); Step 2: Place the graphite blocks (10) in a chamber (43), and introduce a direct airflow (20a) and a reverse airflow (20b) into the chamber (43), the flow of direct air (20a) forming a first flow path (21) in the chamber (43), the reverse air flow (20b) forming a second flow path (22) in the chamber (43), a an air flow interface (23) formed between the first flow path (21) and the second flow path (22); Step 3: Apply a shear airflow (24) produced by the airflow interface (23) to the graphite blocks (10), the shear airflow (24) having sufficient energy for damaging the van der Waals force to disengage a portion of the graphene layers (11); and Step 4: collect a plurality of pieces of graphene platelets (30), the graphene platelets (30) comprising one or more of the graphene layers (11). 3028849 11
    [0002]
    2 - A method of manufacturing graphene platelets (30) according to claim 1, characterized in that, in Step 2, the graphite blocks (10) are placed in the chamber (43) of a generating device 5 of the air flow (40), the air flow generating device (40) including a first inlet (41a) for receiving the direct air flow (20a) and being in communication with the chamber (43) a second inlet (41b) for receiving the reverse airflow (20b) and in communication with the chamber (43), and an airflow outlet (42) in communication with the chamber (43), the airflow interface (23) applying the shear airflow (24) to the graphite blocks (10) in the chamber (43). 15
    [0003]
    3 - A method of manufacturing graphene platelets (30) according to claim 2, characterized in that in Step 3, the air flow generation device (40) further comprises a collection portion 20 (44). ), in which the disengaged graphene layers fall.
    [0004]
    4 - A method of manufacturing graphene platelets (30) according to claim 3, characterized in that in step 4, the collection portion (44) collects the graphene platelets (11) - Platelet manufacturing process graphene (30) according to claim 1, characterized in that in Step 2 the direct airflow (20a) is selected from the group consisting of air, dry air, nitrogen (N2), argon ( Ar), helium (He), hydrogen (H2), oxygen (O2) and ammonia (NH3). A method of manufacturing graphene wafers (30) according to claim 1, characterized in that in Step 2, the reverse air flow (20b) is selected from the group consisting of air, air dry, nitrogen (N2), argon (Ar), helium (He), hydrogen (H2), oxygen (O2) and ammonia (NH3). 7 - A method of manufacturing graphene wafers (30) according to claim 1, characterized in that in Step 3, a flow rate of the shear air flow (24) is between 1 m / s and 200 m / s. 8 - A method of manufacturing graphene platelets (30) according to claim 1, characterized in that in Step 3, the energy is at least greater than 0.1 kJ / mol. 9 - Process for producing graphene platelets (30) according to claim 8, characterized in that the energy is between 0.1 kJ / mole and 5 kJ / mole. A method of manufacturing graphene platelets (30) according to claim 1, characterized in that the graphene platelets (30) have a diameter between 5 nm and 1000 μm.
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    同族专利:
    公开号 | 公开日
    CN105800592B|2018-03-02|
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    TW201619050A|2016-06-01|
    GB2532523A|2016-05-25|
    DE102015101918B4|2020-01-02|
    JP2016098168A|2016-05-30|
    GB201502244D0|2015-03-25|
    DE102015101918A1|2016-05-25|
    TWI499556B|2015-09-11|
    CN105800592A|2016-07-27|
    FR3028849B1|2020-10-16|
    JP6069376B2|2017-02-01|
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    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    TW103140604A|TWI499556B|2014-11-24|2014-11-24|Production method of flaky graphene|
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