WO2023068389A1

WO2023068389A1 - Apparatus for producing graphene

Info

Publication number: WO2023068389A1
Application number: PCT/KR2021/014579
Authority: WO
Inventors: 양우석; 김선주
Original assignee: 한국전자기술연구원; 주식회사 코윈디에스티
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2023-04-27
Also published as: KR20230055510A; KR102603325B1

Abstract

An apparatus for producing graphene is provided. The apparatus for producing graphene according to an embodiment of the present invention may comprise: a supply part which supplies graphite oxide powder or graphene oxide powder; a moving part which is coupled at one side thereof to the supply part, includes a moving part body within which a moving surface having a predetermined width and extending in one direction from one side thereof and a moving space above the moving surface are formed, and is supplied from one side of the moving space with the graphite oxide powder or graphene oxide powder supplied from the supply part and moves same to the other side of the moving space; a laser radiation part which radiates laser beams onto the moving path of the graphite oxide powder or graphene oxide powder to produce graphene powder from the graphite oxide powder or graphene oxide powder; and a collection part which is connected to the other side of the moving part, and separates the graphene powder from the graphite oxide powder or graphene oxide powder and collects the separated graphene powder.

Description

Graphene manufacturing device

The present invention relates to a graphene manufacturing apparatus, and more particularly, to a graphene manufacturing apparatus for producing graphene powder by irradiating a laser to graphite oxide powder or graphene oxide powder. it's about

Graphene is one of the allotropes of carbon and has a structure in which carbon atoms gather to form a two-dimensional plane. Each carbon atom forms a hexagonal lattice, and the carbon atoms are located at the vertices of the hexagon.

Graphene has very high intrinsic electron mobility, high thermal conductivity, Young's modulus, and a very large theoretical specific surface area. In addition, since it is composed of one layer, it has a characteristic of very low absorption of visible light.

Due to these characteristics of graphene, graphene is used in airplanes, automobiles, and building materials by making thin, light and durable objects, or by making fibers with the strength of graphene and used in light and safe combat clothing and bulletproof vests. Carbon fibers using . In addition, graphene's fast electrical conductivity reduces electrical resistance and is expected to develop in the medical industry.

Such graphene is produced from graphite. Conventionally, physical exfoliation, chemical vapor deposition, chemical exfoliation, epitaxial synthesis, etc. have been used to produce graphene, but it is still insufficient to stably produce graphene. am.

These methods have problems in that it is difficult to manufacture graphene so that the residual oxygen impurities in graphene are less than 10%, and the manufacturing method is complicated and the manufacturing time is long.

In particular, in the case of the epitaxial synthesis method, heat treatment at 1500 to 2500 degrees or more is required to make the residual oxygen impurity content less than 10%, and even if such heat treatment is used, there is a problem in that the produced graphene is restacked. .

Therefore, unlike the above-described conventional method, there is a need for a graphene manufacturing apparatus capable of easily manufacturing graphene and reducing residual oxygen impurities in graphene.

In order to solve the above problems, an object of the present invention is to provide a graphene manufacturing apparatus capable of manufacturing graphene without a complicated process.

In addition, an object of the present invention is to provide a graphene production apparatus capable of continuously producing a large amount of graphene.

In addition, an object of the present invention is to provide a graphene manufacturing apparatus capable of increasing graphene manufacturing efficiency.

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below.

In order to solve the above problems, a graphene manufacturing apparatus according to an aspect of the present invention includes a supply unit for supplying graphite oxide powder or graphene oxide powder; The graphite oxide powder or the graphite oxide powder supplied from the supply unit having a moving surface coupled to one side of the supply unit and having a predetermined width therein and extending in one direction from one side and a moving unit body having a moving space formed on the upper side of the moving surface a moving unit that receives graphene oxide powder from one side of the movement space and moves it to the other side; a laser irradiation unit configured to irradiate a laser onto a moving path of the graphite oxide powder or the graphene oxide powder to convert the graphite oxide powder or the graphene oxide powder into graphene powder; and a collecting unit connected to the other side of the moving unit to collect the graphene powder. can include

At this time, the laser irradiation unit may irradiate a linear laser extending in the width direction of the moving surface.

In this case, the supply unit may supply the graphite oxide powder or the graphene oxide powder to one side of the moving surface so that the graphite oxide powder or the graphene oxide powder is distributed in the width direction.

In this case, the intensity of the laser of the laser irradiator (LASER Power Intensity) may be 30 W/mm ² or more and 150 W/mm ² or less.

In this case, a speed at which the moving unit moves the graphite oxide powder or the graphene oxide powder may be 5 mm/s or more and 50 mm/s or less.

At this time, the moving unit is formed in a cylindrical shape so that the moving space is formed therein, and a moving unit body having a moving surface having a predetermined angle with the direction of its own weight is formed on the lower inner surface; and a vibration generating unit disposed on one side of the moving unit body and generating vibrations. The vibration generator may transfer the vibration to the body of the moving unit to move the graphite oxide powder or the graphene oxide powder along the moving surface.

At this time, a quartz substrate 230 formed in an area where the laser irradiation unit irradiates the laser; may further include.

In this case, the quartz substrate may be integrally formed with the body of the moving part.

At this time, the laser irradiation unit is disposed outside the moving unit and is formed on the moving unit body 210 so that the laser L irradiated from the laser irradiation unit 300 penetrates and reaches the moving surface 212 lens 240; may further include.

At this time, a collecting unit coupled to the other side of the moving unit to separate and collect the manufactured graphene powder from the graphite oxide powder or the graphene oxide powder; may further include.

At this time, the collecting unit includes a suction member providing a suction force to collect the graphene powder floating in the moving space as the laser is irradiated to the graphite oxide powder or the graphene oxide powder to form the graphene powder; and a collecting container connected to the suction member to store the collected graphene powder. can include

At this time, the suction member may be a cyclone hopper.

At this time, the collecting unit includes a gas supply member forming a flow so that the graphene powder can move along the moving space; may further include.

At this time, the gas supplied by the gas supply member may be an inert gas.

At this time, the gas supply member is formed in plurality, a part of the gas supply member is disposed behind an area where the laser is irradiated by the laser irradiation unit, and another part of the gas supply member is disposed behind an area irradiated with the laser by the laser irradiation unit. The laser may be disposed in front of the irradiated area.

At this time, a guide member protruding from an upper inner surface of the moving unit body may be formed to guide the flow formed by the gas supply member toward the collecting unit.

At this time, a collection unit for recovering the graphite oxide powder or the graphene oxide powder moved to the other side of the moving unit and supplying it to the supply unit; may further include.

In the apparatus for manufacturing graphene according to an embodiment of the present invention, graphene can be manufactured without a complicated processing process by irradiating a laser to graphite oxide powder or graphene oxide powder.

In addition, the graphene manufacturing apparatus according to an embodiment of the present invention includes a moving unit for continuously moving the graphite oxide powder or the graphene oxide powder, so that a large amount of graphene can be continuously manufactured.

In addition, the graphene manufacturing apparatus according to an embodiment of the present invention may increase graphene manufacturing efficiency by including a recovery unit for separating graphene oxide or graphene oxide that has not been graphene after laser irradiation.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be inferred from the description of the present invention or the configuration of the invention described in the claims.

1 is a diagram illustrating a graphite oxide powder or graphene oxide powder moving state of a graphene manufacturing apparatus according to an embodiment of the present invention.

2 is an enlarged view of a moving part of a graphene manufacturing apparatus according to an embodiment of the present invention.

3 is a diagram illustrating a laser irradiation state of a graphene manufacturing apparatus according to an embodiment of the present invention.

FIG. 4 is an enlarged cross-sectional view of line A-A of FIG. 3 .

5 is an enlarged perspective view illustrating a state in which a laser is irradiated to the graphite oxide powder or the graphene oxide powder of the graphene manufacturing apparatus according to an embodiment of the present invention.

6 is a diagram showing Raman shift values of graphene prepared under a first experimental condition using a graphene manufacturing method according to an embodiment of the present invention.

7 is a graph showing Raman shift values of graphene prepared under second experimental conditions using the graphene manufacturing method according to an embodiment of the present invention.

8 is a graph showing Raman shift values of graphene prepared under third experimental conditions using the graphene manufacturing method according to an embodiment of the present invention.

9 is a graph showing Raman shift values of graphene prepared under a fourth experimental condition using the graphene manufacturing method according to an embodiment of the present invention.

10 is a graph showing Raman shift values of graphene prepared under a fifth experimental condition using the graphene manufacturing method according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. This invention may be embodied in many different forms and is not limited to the embodiments set forth herein.

Terms used in the embodiments of the present invention may be interpreted as meanings commonly known to those skilled in the art unless otherwise defined.

In order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

In order to clearly express the characteristics of the configuration in the drawings, the thickness or size is exaggerated, and the thickness or size of the configuration shown in the drawings is not shown in reality.

The present invention relates to a graphene manufacturing apparatus, and provides a graphene manufacturing apparatus for manufacturing graphene powder by irradiating a graphite oxide powder or a graphene oxide powder with a laser.

1 is a diagram illustrating a graphite oxide powder or graphene oxide powder moving state of a graphene manufacturing apparatus according to an embodiment of the present invention. 2 is an enlarged view of a moving part of a graphene manufacturing apparatus according to an embodiment of the present invention. 3 is a diagram illustrating a laser irradiation state of a graphene manufacturing apparatus according to an embodiment of the present invention. FIG. 4 is an enlarged cross-sectional view of line A-A of FIG. 3 . 5 is an enlarged perspective view illustrating a state in which a laser is irradiated to the graphite oxide powder or the graphene oxide powder of the graphene manufacturing apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the graphene manufacturing apparatus 1 according to an embodiment of the present invention includes a supply unit 100, a moving unit 200, a laser irradiation unit 300, a quartz substrate 230, and a collecting unit ( 700) is provided.

As shown in FIG. 1 , the supply unit 100 supplies graphite oxide powder or graphene oxide powder G1. At this time, a supply port 110 through which the graphite oxide powder or the graphene oxide powder G1 is discharged may be formed protruding from one side of the supply unit 100 .

The supply hole 110 may be formed to extend in the width direction, and the graphite oxide powder or graphene oxide powder G1 discharged through the supply hole 110 may be continuously disposed to be distributed in a predetermined width W. can Accordingly, the laser irradiation unit 300 to be described later can irradiate the laser L to the graphite oxide powder or the graphene oxide powder G1 over a wide area.

As shown in FIG. 1 , the moving unit 200 is connected to the supply port 110 of the supply unit 100 . At this time, the moving unit 200 receives the graphite oxide powder or graphene oxide powder G1 from the supply unit 100 and moves the graphite oxide powder or graphene oxide powder G1 from one side to the other.

Describing this in more detail, the moving part 200 of the graphene manufacturing apparatus 1 according to an embodiment of the present invention includes a moving part body 210, a moving surface 212, and a moving space 211.

As shown in FIG. 1 , a moving surface 212 extending in one direction from one side having a predetermined width W is formed inside the moving part body 210 . The moving surface 212 is formed on the lower side of the moving unit body 210 along the direction of its own weight and serves as a moving path for the graphite oxide powder or graphene oxide powder G1 supplied through the supply unit 100 .

A moving space 211 is formed on the upper side of the moving surface 212, and the moving space 211 extends in the longitudinal direction like the moving surface 212. At this time, the moving unit body 210 may be formed in a tubular shape as shown in FIG. 1, but is not limited thereto.

The supply port 110 is coupled to one side of the moving unit body 210, and accordingly, the graphite oxide powder or graphene oxide powder G1 supplied from the supply unit 100 is disposed on one side of the moving surface 212. At this time, the vibration generating unit 400 is coupled to the moving unit body 210 .

The vibration generating unit 400 vibrates the moving unit body 210 so that the moving unit body 210 vibrates at a predetermined frequency. At this time, as shown in FIG. 2, the moving surface 212 is formed to have a predetermined angle with the axis C extending in the direction of its own weight. Through this, when the vibration generating unit 400 vibrates the moving unit body 210, the graphite oxide powder or graphene oxide powder G1 is separated from the moving surface 212 and receives gravity again in the direction of its own weight toward the moving surface 212. In the process of moving, it moves in one direction along the inclined moving surface 212 .

At this time, the frequency of the vibration generated by the vibration generator 400 may vary as needed. The moving speed of the graphite oxide powder or graphene oxide powder G1 moving along the moving surface 212 may be 5 mm/s or more and 50 mm/s or less, preferably 16.67 mm/s, depending on the frequency. At this time, when the moving speed of the graphite oxide powder or graphene oxide powder (G1) moving along the moving surface 212 is 16.67 mm / s, the graphite oxide is irradiated by the laser irradiation unit 300 to be described later. The exposure time of the powder or graphene oxide powder G1 may be 0.024 seconds.

When the graphite oxide powder or the graphene oxide powder (G1) is moved in one direction by a separate moving means, a separation inevitably occurs between the separate moving means and the moving unit body 210, and the graphite oxide powder or graphene The oxide powder G1 may unintentionally accumulate in the space caused by the above-mentioned separation. Accordingly, failure of the moving means may occur, and graphite oxide powder or graphene oxide powder G1 may be lost, thereby reducing graphene production efficiency. Therefore, in the present embodiment, the above problems can be prevented by moving the graphite oxide powder or the graphene oxide powder G1 along the moving surface 212 by vibration.

As shown in FIG. 3, the laser irradiation unit 300 irradiates a laser L to the graphite oxide powder or graphene oxide powder G1 moving along the moving surface 212 to obtain the graphite oxide powder or graphene oxide powder ( G1) is prepared as graphene powder (G2).

At this time, when the graphite oxide powder or graphene oxide powder G1 is exposed to the laser L, the graphite oxide or graphene oxide is reduced to graphene, and the reduced graphene powder G2 is formed by the moving part body ( 210) to float in the movement space 211.

At this time, the intensity (LASER Power Intensity) of the laser (L) irradiated by the laser irradiator 300 may be 30 W/mm ² or more and 150 W/mm ^{2 or} less, preferably 84,85 W/mm ² there is.

As shown in FIGS. 4 and 5 , the laser L irradiated by the laser irradiation unit 300 is a linear laser extending in the width direction of the moving surface 212 perpendicular to the extending direction of the moving surface 212, that is, a line laser. can Accordingly, the graphite oxide powder or graphene oxide powder G1 distributed in the width direction on the moving surface 212 is moved in the extension direction of the moving surface 212, so that the area A to which the laser L is irradiated can be widened. do. Accordingly, more graphene powder (G2) can be manufactured.

The laser irradiation unit 300 may be disposed outside the moving unit body 210, and accordingly, the laser L is transmitted through the laser irradiation unit 300 side of the moving unit body 210 to produce graphite oxide powder or graphene oxide powder. A lens 240 may be provided to reach (G1). A known lens may be used as the lens 240, and the shape or material of the lens 240 is not limited.

Since the laser irradiator 300 is disposed outside, the movement flow of the graphene powder G2 can be smoothed as will be described later. In addition, by providing the lens 240 to prevent the moving space 211 of the moving unit body 210 from being exposed to the outside for laser (L) irradiation, the graphene powder (G2) produced during laser irradiation is supplied to the moving unit. It is possible to prevent leakage to the outside of the body 210 .

As shown in FIGS. 3, 4 and 5, as a part of the moving surface 212 of the moving unit body 210, a quartz substrate 230 is formed in an area where the laser L is irradiated. The quartz substrate 230 prevents the moving unit body 210 from being damaged by the laser L.

At this time, since the quartz substrate 230 and the moving part body 210 are integrally formed, it is possible to prevent a step from occurring on the moving surface 212 . Through this, it is possible to prevent the graphite oxide powder or the graphene oxide powder G1 from accumulating between the quartz substrate 230 and the moving part body 210, thereby impeding the smooth movement of the graphite oxide powder or the graphene oxide powder G1. be able to

Meanwhile, as shown in FIG. 3 , the collecting unit 700 converts graphene powder G2 generated by exposing the graphite oxide powder or graphene oxide powder G1 to the laser L to graphite oxide powder or graphene oxide. It is collected separately from the powder (G1).

At this time, the collecting unit 700 is coupled to the other side of the moving unit body 210, more specifically, a collecting tool formed on the other side of the moving unit body 210 so that the moving space 211 and the outside can communicate fluidly. (260). The collecting unit 700 sucks the graphene powder G2 floating in the moving space 211 through the collecting port 260 to separate the graphene powder G2 from the graphite oxide powder or the graphene oxide powder G1. so that it can be captured.

To this end, the collecting unit 700 of the graphene manufacturing apparatus 1 according to an embodiment of the present invention includes a suction member 710 and a collecting container 720 .

As shown in FIG. 3 , one side of the suction member 710 is coupled to the collector 260 and provides a suction force through the collector 260 . At this time, a variety of well-known methods may be used as a method for the suction member 710 to provide suction power. For example, the suction member 710 may be a cyclone hopper suitable for collecting powder.

The other side of the suction member 710 is coupled with a collecting container 720 in which graphene powder G2 discharged through the collecting hole 260 by the suction member 710 can be stored. The shape of the collecting container 720 is not limited as long as it can provide a space in which the graphene powder G2 can be stored.

Meanwhile, the graphene manufacturing apparatus 1 according to an embodiment of the present invention may further include a gas supply member 500 and a guide member 220 .

The gas supply member 500 forms a gas flow so that the graphene powder G2 floating in the moving space 211 can be moved to one side of the moving unit body 210, that is, to the collector 260 side.

To this end, the gas supply member 500 supplies gas toward the collector 260 . At this time, the gas supply member 500 forms a gas flow by supplying gas at a fine intensity so that the graphite oxide powder or the graphene oxide powder G1 does not float.

The gas supplied from the gas supply member 500 may be an inert gas such as nitrogen in order to prevent the gas from reacting with the graphene powder G2.

Also, as shown in FIG. 3 , a plurality of gas supply members 500 may be formed in order to more efficiently move the graphene powder G2 . The number of gas supply members 500 is not limited, and in this embodiment, the first gas supply member 500a and the second gas supply member 500b are disposed.

As shown in FIG. 3, the first gas supply member 500a is in front of the region A where the laser irradiator 300 irradiates the laser L, and moves the graphite oxide powder or graphene oxide powder G1. It may be disposed on the opposite side of the moving direction of the graphite oxide powder or graphene oxide powder G1 as the direction side and the rear side. Accordingly, the graphene powder (G2), which is suspended by the laser (L) irradiation, is prevented from moving to the rear of the movement space 211 and is induced to move to the collector 260.

At this time, in order to guide the movement path of the graphene powder G2 moving through the first gas supply member 500a and the second gas supply member 500b, as shown in FIG. 3, the moving unit body ( 210) may be formed with a guide member 220 protruding from the inner upper surface.

As shown in FIG. 3 , the guide member 220 may be formed with an inclination such that the graphene powder G2 moves adjacent to the collector 260 side.

Meanwhile, the graphene manufacturing apparatus 1 according to an embodiment of the present invention may further include a recovery unit 600 .

The recovery unit 600 recovers the graphite oxide powder or graphene oxide powder G1 that has not been reduced to graphene even after being irradiated with the laser L, and supplies it to the supply unit 100 to obtain graphite oxide powder or graphene oxide powder ( G1) is continuously exposed to the laser (L) so that it can be reduced to graphene.

The recovery unit 600 is disposed on the other side of the movable unit body 210, and there is no limitation on the position disposed in front of the region A to which the laser L is irradiated.

There is no limitation on how the recovery unit 600 moves the graphite oxide powder or graphene oxide powder (G1) to the supply unit 100, and in this embodiment, the recovery unit 600 uses the recovery guide member 610 and A moving member 620 may be provided.

As shown in FIG. 3 , the recovery guide member 610 is coupled to the recovery port 250 formed on the other side of the moving unit body 210 . The recovery port 250 is formed to penetrate downward on the other side of the moving surface 212, and the graphite oxide powder or graphene oxide powder G1 moving along the moving surface 212 passes through the recovery port 250 to the moving part body ( 210) is discharged to the outside.

The graphite oxide powder or graphene oxide powder G1 discharged through the recovery port 250 is guided by the recovery guide member 610 and moved to the moving member 620 . The moving member 620 moves the graphite oxide powder or graphene oxide powder G1 to the supply unit 100, and the supply unit 100 receiving the graphite oxide powder or graphene oxide powder G1 is again supplied through the supply port ( 110), the graphite oxide powder or the graphene oxide powder G1 is supplied to the moving part body 210. At this time, as the moving member 620, various known parts may be used to move the graphite oxide powder or the graphene oxide powder G1, but is not limited thereto.

Hereinafter, the relationship between the intensity per unit area of the laser L of the graphene manufacturing method according to another embodiment of the present invention and the purity of graphene will be examined with reference to FIGS. 6 to 10 . 6 is a diagram illustrating Raman shift values of graphene prepared under a first experimental condition using a graphene manufacturing method according to an embodiment of the present invention. 7 is a graph showing Raman shift values of graphene prepared under second experimental conditions using the graphene manufacturing method according to an embodiment of the present invention. 8 is a graph showing Raman shift values of graphene prepared under third experimental conditions using the graphene manufacturing method according to an embodiment of the present invention. 9 is a graph showing Raman shift values of graphene prepared under a fourth experimental condition using the graphene manufacturing method according to an embodiment of the present invention. 10 is a graph showing Raman shift values of graphene prepared under a fifth experimental condition using the graphene manufacturing method according to an embodiment of the present invention.

When the laser (L) is irradiated to graphite oxide or graphene oxide to graphene, the residual oxygen impurity content corresponds to 3 to 5%, and high-quality graphene can be produced. At this time, in order to determine the degree to which graphite oxide or graphene oxide is reduced to graphene, a Raman shift value may be confirmed by irradiating light.

When the degree of reduction to graphene is high, the G peak value of the Raman shift value comes out higher than the D peak value, and the 2D peak value comes out higher than other experiments.

In the experimental conditions of FIGS. 6 to 10, when the graphene oxide powder (G1) moves at 16.67 mm/s, the area to which the laser (L) is irradiated is linear, and the area is 132 mm ² , and the maximum area of the laser (L) is It is assumed that the output is 16 W and that the graphene oxide powder G1 moves once in a state where the laser L is irradiated.

The six first experiments individually conducted in FIG. 6 are the results of testing the output of the laser L at 30% of the maximum output, and accordingly, the intensity per unit area of the laser L is 36.36 W/mm ² , and the unit area The exposure time to this laser L is 0.024 s.

The second experiment of six times individually conducted in FIG. 7 is the result of testing the output of the laser L at 50% of the maximum output, and accordingly, the intensity per unit area of the laser L is 60.61 W/mm ² , and the unit area The exposure time to this laser L is 0.024 s.

The third experiment of six times individually conducted in FIG. 8 is the result of testing the output of the laser L at 70% of the maximum output, and accordingly, the intensity per unit area of the laser L is 84.85 W/mm ² , and the unit area The exposure time to this laser L is 0.024 s.

The fourth experiment of six times individually conducted in FIG. 9 is the result of testing the output of the laser L at 90% of the maximum output, and accordingly, the intensity per unit area of the laser L is 109.09 W/mm ² , and the unit area The exposure time to this laser L is 0.024 s.

10, the 5th experiment of 6 times individually conducted is the result of testing the output of the laser L at 100% of the maximum output, and accordingly, the intensity per unit area of the laser L is 121.21 W/mm ² , and the unit area The exposure time to this laser L is 0.024 s.

6 to 10, when the D peak value is relatively small and the G peak value is large, it is the third experiment, the fourth experiment, and the fifth experiment, and the results of the third experiment, the fourth experiment, and the fifth experiment. Since there is no significant difference, high purity graphene can be produced when the intensity per unit area of the laser L is at least 70 W/mm ² or more for efficient power use of the laser L, and the unit of the laser L When the intensity per area is 84.85 W/mm ² , graphene with optimal purity can be produced.

Although the graphene manufacturing apparatus according to various embodiments of the present invention has been described above, the graphene manufacturing apparatus according to this embodiment is not applicable only for graphene manufacturing, and laser is irradiated to continuously provided raw materials. It will be clearly understood by those of ordinary skill in the art that the present invention can be used as an apparatus for producing a specific material.

As described above, the preferred embodiments according to the present invention have been reviewed, and the fact that the present invention can be embodied in other specific forms in addition to the above-described embodiments without departing from the spirit or scope is a matter of ordinary skill in the art. It is self-evident to them. Therefore, the foregoing embodiments are to be regarded as illustrative rather than restrictive, and thus the present invention is not limited to the foregoing description, but may be modified within the scope of the appended claims and their equivalents.

Claims

A supply unit for supplying graphite oxide powder or graphene oxide powder;

The graphite oxide powder or the graphite oxide powder supplied from the supply unit having a moving surface coupled to one side of the supply unit and having a predetermined width therein and extending in one direction from one side and a moving unit body having a moving space formed on the upper side of the moving surface a moving unit that receives graphene oxide powder from one side of the movement space and moves it to the other side;

a laser irradiation unit configured to irradiate a laser onto a moving path of the graphite oxide powder or the graphene oxide powder to convert the graphite oxide powder or the graphene oxide powder into graphene powder; and

a collecting unit connected to the other side of the moving unit to separate and collect the graphene powder from the graphite oxide powder or the graphene oxide powder; Including, graphene manufacturing apparatus.
According to claim 1,

The laser irradiation unit irradiates a linear laser extending in the width direction of the moving surface, graphene manufacturing apparatus.
According to claim 1,

The supply unit supplies the graphite oxide powder or the graphene oxide powder to one side of the moving surface so that the graphite oxide powder or the graphene oxide powder is distributed in the width direction.
According to claim 2,

The intensity of the laser irradiation unit (LASER Power Intensity) of the laser is 30 W / mm 2 or more and 150 W / mm 2 or less, graphene manufacturing apparatus.
According to claim 4,

A speed at which the moving unit moves the graphite oxide powder or the graphene oxide powder is 5 mm/s or more and 50 mm/s or less, graphene manufacturing apparatus.
According to claim 1,

The moving surface is formed to have a predetermined angle with the direction of its own weight,

a vibration generating unit disposed on one side of the moving unit body and generating vibration; Including more,

wherein the vibration generating unit transmits the vibration to the body of the moving unit to move the graphite oxide powder or the graphene oxide powder along the moving surface.
According to claim 2,

a quartz substrate formed in an area where the laser irradiator irradiates the laser; Further comprising a graphene manufacturing apparatus.
According to claim 7,

The quartz substrate is integrally formed with the moving part body, graphene manufacturing apparatus.
According to claim 6,

The laser irradiation unit is disposed outside the moving unit,

a lens formed on the body of the moving unit so that the laser irradiated from the laser irradiation unit passes through and reaches the moving surface; Further comprising a graphene manufacturing apparatus.
According to claim 1,

The collection unit

a suction member providing a suction force to collect the graphene powder floating in the moving space as the graphene powder is formed by irradiating the graphite oxide powder or the graphene oxide powder with the laser; and

a collection container connected to the suction member to store the collected graphene powder; Including, graphene manufacturing apparatus.
According to claim 10,

The suction member is a cyclone hopper, graphene manufacturing apparatus.
According to claim 10,

The collecting unit includes a gas supply member forming a flow so that the graphene powder can move along the moving space; Further comprising a graphene manufacturing apparatus.
According to claim 12,

The gas supplied by the gas supply member is an inert gas, graphene manufacturing apparatus.
According to claim 12,

The gas supply member is formed in plurality,

A part of the gas supply member is disposed behind an area where the laser is irradiated by the laser irradiation unit,

The other part of the gas supply member is disposed in front of the region irradiated with the laser by the laser irradiation unit, graphene manufacturing apparatus.
According to claim 12,

A guide member protruding from an upper inner surface of the moving unit body is formed to guide the flow formed by the gas supply member toward the collecting unit.
According to claim 1,

a recovery unit for recovering the graphite oxide powder or the graphene oxide powder moved to the other side of the moving unit and supplying them to the supply unit; Further comprising a graphene manufacturing apparatus.