CN219279502U - Graphene stripping device - Google Patents

Abstract

The utility model relates to the technical field of graphene production equipment, in particular to a graphene stripping device. The stripping device comprises a kettle cover, a kettle body, a motor, a transmission shaft, ball milling media, a feed inlet, a discharge outlet and an air inlet. The kettle body comprises a kettle outer layer, a heating layer and a kettle inner layer, and a plurality of fixing bolt openings are arranged at the bulges of the kettle outer layer; the kettle cover comprises a kettle sealing groove and a fixed bolt hole; the transmission shaft is a hollow air inlet pipe, and the wall of the transmission shaft is provided with a plurality of unidirectional air distribution holes. According to the utility model, under the heating and pressurizing method, the shearing force generated by high-speed rotation of the ball milling media is utilized to peel off the graphite to generate large-sized graphene, and the impact force generated by collision among the ball milling media is utilized to reduce the large-sized graphene, so that the efficient peeling effect of the few-layer graphene is realized.

Description

Graphene stripping device

Technical Field

The utility model relates to the technical field of graphene production equipment, in particular to a stripping device for stripping graphite into few-layer graphene.

Background

Graphene is a two-dimensional material with hexagonal honeycomb lattice structures formed by flaky sp2 hybridized orbits, and is widely applied to the fields of materials, electricity, optics, biomedicine and the like due to the excellent performances of high current-carrying electron mobility, high heat conductivity, high electric conductivity, high strength, high hardness and the like. Strictly speaking, graphene is a single-layer lamellar structure, but because single-layer graphene is difficult to prepare, oligolayer graphene with similar properties is also generally classified into the category of graphene.

Currently, the main preparation methods of graphene are divided into bottom-up bottom layer growth methods, such as Chemical Vapor Deposition (CVD) and epitaxial growth methods, and top-down top layer stripping methods, such as mechanical stripping and liquid phase stripping methods. The former can produce high quality, defect-free graphene, but has high cost and low yield, and is not suitable for commercial mass production. The latter uses physical or chemical method to weaken intermolecular force between graphite sheets, so as to obtain single-layer or less-layer graphene, which has low cost, high efficiency and better industrial application prospect.

The stripping means commonly used in the mechanical stripping method are micro-stripping method, grinding, conventional ball milling, stirring ball milling and the like. The micro-stripping method, namely a method for stripping the oriented pyrolytic graphite for multiple times by using transparent adhesive tapes in 2004 by Constant-Nuo Wo Xiao Luofu and Anderie-Game two-position scientists, is high in yield, but is low in controllability and yield, and cannot realize mass production. According to the grinding method, graphite is ground between a grinding instrument mortar body and a pestle body, the required solvent addition amount is small when the graphite is ground, but if the pressure applied to the graphite by the pestle body is too large, the graphene structure can be damaged, and structural defects and too small crystals are generated; the shearing force generated by grinding between the mortar body and the pestle body can cause the uneven pressure to influence the quality of the graphene, and the shearing force is derived from the friction force caused by the pressure, so that the optimal working state of the grinding process is difficult to obtain, and the industrial mass production is difficult. In the conventional ball milling method, graphite powder is milled in a ball mill by means of milling balls, and the milling balls can provide impact and shearing acting forces for the powder in the ball milling process. Although the conventional ball milling method overcomes the defect that the conventional powder is unevenly pressed, the large impact force generated by the impact of a ball milling medium can cause the structural defect of the graphene, so that the crystal size of the peeled graphene is reduced. Stirring ball milling, namely a mechanical milling mode combining stirring and ball milling, wherein a stirrer drives a milling ball to collide and rub in a cavity to grind powder. In the stirring ball milling method, the impact action of the grinding balls is milder than that of the ball milling method, but impact force is still generated on the peeled graphene, so that structural defects are generated, and the size of the peeled graphene crystal is reduced.

The liquid phase exfoliation method refers to a preparation method of exfoliating graphite into single-layer or oligolayer graphene in a liquid medium. The method is simple, low in cost, low in raw material requirement, easy to realize graphene stripping, and more suitable for industrial large-scale batch production. The liquid phase peeling method can be classified into a liquid phase ultrasonic peeling method, a liquid phase shear peeling method, a wet ball milling peeling method, an electrochemical peeling method, and the like.

Liquid phase ultrasonic exfoliation, i.e., a method of exfoliating bulk graphite into single or few-layered graphene sheets by ultrasonic action in a liquid medium. Although the graphene can be effectively peeled by ultrasonic in the liquid-phase ultrasonic peeling method, the cavitation effect of the liquid-phase ultrasonic peeling method can generate local high temperature and high pressure, so that the defect of the graphene is caused. Moreover, as the working distance increases, the effective energy generated by ultrasonic waves decreases, which limits the industrial mass production of liquid-phase ultrasonic stripping methods. The liquid phase shearing stripping method is to utilize the combined action of shearing force, collision effect and jet cavitation effect generated by the rotor-stator of the high-speed shearing machine in the process of rotating at high speed, so that graphite is stripped in the liquid phase. In the electrochemical exfoliation method, ions, charged molecules, or the like are intercalated between graphite layers by an electric current, and the graphite is exfoliated by expansion. The method has high efficiency, simple equipment and low cost. Electrochemical exfoliation can be classified into anodic intercalation and cathodic intercalation, however, anions in the anodic intercalation are electron donors, which may lead to structural defects in the graphene formation or the introduction of functional groups, and slow rate of cathodic intercalation. The wet ball milling stripping method is characterized in that graphite is stripped into graphene by utilizing a wet ball milling process of a ball mill, and the basic principle is similar to that of a dry ball milling method, but due to the fact that a proper solvent is introduced, inter-layer intermolecular force of the graphite is reduced, and the introduced dispersing agent weakens the inter-layer intermolecular force of the graphite, so that the stripping efficiency of the graphene is improved. However, the graphene prepared by the method has the defects of low preparation efficiency, poor stripping effect and the like.

Therefore, there is a need to develop a graphene production apparatus that can be used industrially to efficiently obtain a large crystal size and reduce structural defects.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide a graphene stripping device, which solves the problems that in the prior graphene mechanical stripping device, graphite sheets are easy to be crushed or the structure is damaged when graphene is stripped, and the problems of overgrinding, excessive impact force, breakage of the graphite sheets and the like possibly occur by combining wet ball milling with a stirring kettle; in addition, the device improves the reaction temperature and the reaction pressure in the reaction kettle by a heating method, and the heating enhances the activity of the solvent, the intercalating agent or the swelling agent, is beneficial to enabling small molecules in the solvent to enter gaps of graphite layers, damages Van der Waals force between the graphite layers, improves the stripping efficiency, and solves the problems of low stripping efficiency, small size, multiple structural defects and the like of graphene prepared by the existing graphene stripping device.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the graphene stripping device comprises a kettle cover, a kettle body and a ball milling medium, wherein the kettle cover is detachably connected to the kettle body and comprises a kettle sealing groove, a fixing bolt hole and a fixing piece; the kettle body comprises a kettle outer layer, a heating layer, a kettle inner layer, a stirring device, a feed inlet and a discharge outlet, and the ends of the feed inlet and the discharge outlet are respectively provided with a switch valve; the outer edge of the outer layer of the kettle is convex and provided with a through fixing bolt opening; the ball milling medium is arranged in the gap between the inner part of the kettle body and the stirring device; the stirring device comprises a transmission shaft, a motor and a stirring paddle, wherein the transmission shaft is arranged at the central shaft in the kettle body; the motor is arranged outside the kettle body and is connected with the transmission shaft through the center of the kettle bottom; the stirring paddles are provided with a plurality of stirring paddles and are fixedly connected with the transmission shaft in the vertical direction of the transmission shaft; the kettle body is provided with a pressure gauge and a thermometer.

Preferably, the kettle body is cylindrical, the kettle cover is cake-shaped, the outer diameter of the kettle cover is consistent with the outer diameter of the bulge at the outer edge of the kettle outer layer of the kettle body, and a plurality of matched fixing bolt openings with the same diameter and the same position are arranged at the bulge at the outer edge of the kettle cover and the outer edge of the kettle outer layer; the heating layer of the kettle body is positioned between the kettle inner layer and the kettle outer layer and is tightly connected, the heights of the kettle outer layer and the kettle inner layer at the opening end of the kettle body are the same, and the height of the heating layer at the opening end of the kettle body is lower than that of the kettle inner layer, so that a groove is formed among the kettle inner layer, the heating layer and the kettle outer layer; the kettle cover is characterized in that two sealing grooves are formed in the inner side of the kettle cover and are concentric annular grooves, the width of each sealing groove in the outer side is equal to the thickness of the outer layer of the kettle, the width of each sealing groove in the inner side is equal to the thickness of the inner layer of the kettle, the depths of the two sealing grooves are equal to the depth of the opening side of the heating layer on the kettle body and the depth of the opening side edge of the convex kettle body at the outer edge of the kettle to the edge of the opening side of the outer layer of the kettle, the sealing grooves can be matched with the positions of the inner layer of the kettle and the outer layer of the kettle, and the two sealing grooves and the bulges between the sealing grooves form a sealing device of the kettle cover.

Further, the fixing piece of the kettle cover is fixed on the inner side of the kettle cover and is an annular bulge, and the inner diameter of the annular bulge is equal to the outer diameter of the transmission shaft.

Preferably, the stirring paddles are any one of bar type, screw type, turbine type, frame type or common stirring paddle type or the combination of different types.

Preferably, the ball milling media is between 1mm and 10mm in diameter.

Preferably, the stripping device is vertical or horizontal.

In order to further improve the stripping efficiency, the utility model provides a sectional reaction kettle, wherein the first stage adopts a large-diameter preliminary coarse grinding method, and the second stage adopts a secondary fine grinding method to produce graphene in sections and high efficiency.

Preferably, a chamber baffle plate fixed on the kettle body is arranged in the middle of the chamber in the kettle body to divide the chamber into a first chamber and a second chamber; a fan-shaped area filter screen is arranged from the center point to the edge of the chamber partition plate, and the area of the fan-shaped filter screen is not more than one quarter of the area of the chamber partition plate. Further, the ball milling medium is a spherical medium with various diameters, a large-diameter medium is arranged in the first cavity, and a small-diameter medium is arranged in the second cavity; the mesh width of the filter screen is smaller than the minimum diameter of ball milling media in the second chamber, the filter screen is arranged at the fourth quadrant of the upper half part of the chamber partition board, and the area of the filter screen is not more than one fourth of the area of the chamber partition board; the feeding port is arranged at the top end of the first chamber and is arranged at the first quadrant side of the chamber partition plate; the discharge gate is located second cavity bottom. Further, the stirring paddle is screw type, turbine type or a combination mode of the stirring paddle and the turbine type.

In order to enable the environment in the kettle to be in a specific atmosphere state, the graphene stripping device is further provided with an air inlet pipe and one-way air distribution holes, and meanwhile, the effects of pressurizing and promoting material stirring can be achieved.

Preferably, the transmission shaft is hollow and tubular, and the pipe wall is provided with a plurality of unidirectional air distribution holes; the fixing piece on the kettle cover is positioned at the center of the inner side of the kettle cover and is connected with the kettle cover and the transmission shaft, and the kettle cover is provided with an air inlet pipe which penetrates through the fixing piece and is communicated with the transmission shaft. The unidirectional air distribution holes only enable air to flow into the cavity of the kettle body from the hollow transmission shaft, and feed liquid and air in the cavity of the kettle body cannot flow into the hollow transmission shaft.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the graphene stripping device provided by the utility model, graphite solids are added into the solvent or the intercalation agent, the wet ball milling is combined with the stirring kettle, and after the solvent or the intercalation agent is added, the solvent or the intercalation agent enters between graphite layers along with stripping, so that the swelling process is accelerated, and the stripping of the graphite layers is facilitated. Under the action of a proper solvent or an intercalation agent, the acting force between graphite layers is reduced, the stripping efficiency is improved, the impact force between ball milling media and the wall of the ball milling media can be reduced, and the problems that graphite sheets are easily crushed or damaged in structure, graphite sheets are crushed due to simple mechanical stripping, and the defects of undersize crystal structure and the like are possibly caused by excessive grinding and impact force in the simple mechanical ball milling process can be reduced. Under the stirring action of the stirring kettle, the dispersion of graphite in the solvent can be more uniform, so that uniform graphene is obtained. And under the stirring action of the solvent, ball milling media collide with each other, so that the stripping efficiency, yield and product quality are improved.

2. According to the graphene stripping device provided by the utility model, the heating layer is introduced to heat the solvent or the intercalating agent, and the pressure in the kettle is increased due to the increase of the temperature, so that the activity of a solvent substance can be improved, the solvent or the intercalating agent can be more favorably fused between graphite layers, and the stripping efficiency is improved.

3. According to the graphene stripping device provided by the utility model, the gas is introduced, so that a specific gas atmosphere can be formed, and meanwhile, the uniform mixing of graphite in a solvent or an intercalation agent can be promoted, the pressure in a kettle is increased, and the stripping efficiency is improved.

4. The graphene stripping device provided by the utility model is not only suitable for stripping preparation of graphene, but also suitable for ball milling, stripping and modification of carbon or clay lamellar structures such as various lamellar structure minerals, graphite, kaolin, bentonite and the like.

Drawings

Fig. 1 is a schematic diagram of a semi-sectional structure of an embodiment 1 of a graphene peeling apparatus according to the present utility model;

FIG. 2 is a schematic view of the external structure of the graphene peeling apparatus of the present utility model;

FIG. 3 is a schematic diagram of a lid of a graphene stripping apparatus of the present utility model;

FIG. 4 is a schematic semi-sectional view of example 2 of a graphene peeling apparatus of the present utility model;

FIG. 5 is a schematic semi-sectional view of example 3 of a graphene peeling apparatus of the present utility model;

FIG. 6 is a schematic partial cross-sectional view of a chamber separator along line A-A in example 3 of a graphene peeling apparatus of the present utility model.

In the figure: 1. a kettle cover; 101. sealing the groove; 102. a fixing bolt hole; 103. the outer edge of the outer layer of the kettle is convex; 2. a kettle body; 201. an outer layer of the kettle; 202. a heating layer; 203. a kettle inner layer; 204. a first chamber; 205. a second chamber; 3. a feed inlet; 301. a feed inlet switch valve; 4. a discharge port; 401. a discharge port switch valve; 5. a stirring device; 501. a motor; 502. a transmission shaft; 503. stirring paddles; 504. unidirectional air distribution holes; 6. an air inlet pipe; 601. a fixing member; 7. ball milling medium; 8. a pressure gauge; 9. a thermometer; 10. a chamber partition; 1001. and (5) a filter screen.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

The technical solution of the present utility model is further described below, but the scope of the claimed utility model is not limited to the above.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "middle", "upper", "lower", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in place when the inventive product is used, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The following describes the embodiments of the present utility model further with reference to examples and drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.

The material in the kettle body 2 can accelerate the stripping of the graphene in the feed liquid in the kettle body 2 through the collision and rolling action between the ball milling media 7 and the wall of the inner layer 203 of the kettle. Under the conditions of heating, pressurizing and air distribution, the solvent activity of the feed liquid is promoted, so that the stripping efficiency and stripping effect are improved.

Example 1

Referring to fig. 1, 2 and 3, a first embodiment of the present utility model is provided. The device includes cauldron lid 1, the cauldron body 2, ball-milling medium 7, and cauldron lid 1 can dismantle and connect on the cauldron body 2, and cauldron lid 1 includes cauldron seal groove 101, fixing bolt hole 102 and mounting 601. The kettle body 2 comprises a kettle outer layer 201, a heating layer 202, a kettle inner layer 203, a stirring device 5, a feed inlet 3 and a discharge outlet 4, wherein the end part of the feed inlet 3 is provided with a feed inlet switch valve 301, and the end part of the discharge outlet 4 is provided with a discharge outlet switch valve 401.

Referring to fig. 1, the outer peripheral protrusion 103 of the outer layer of the kettle is provided with a through fixing bolt hole 102. The ball milling medium 7 is arranged in the gap between the inner part of the kettle body 2 and the stirring device 5. The stirring device 5 is used for stirring the feed liquid in the kettle body 2. The stirring device 5 comprises a motor 501, a transmission shaft 502 and a stirring paddle 503, wherein the transmission shaft 502 is arranged at the central shaft inside the kettle body 2, and the motor 501 is arranged outside the kettle body 2 and is connected with the transmission shaft 502 through the center of the bottom of the kettle. The kettle body 2 is provided with a plurality of stirring paddles 503 which are fixedly connected with the transmission shaft 502 in the vertical direction of the transmission shaft 502. The stirring device 5 stirs the feed liquid in the kettle body 2, and has the effects of making the feed liquid uniform and accelerating stripping. And a pressure gauge 8 and a thermometer 9 are arranged on the kettle body 2 and are used for monitoring the internal temperature and pressure of the kettle body.

Referring to fig. 3, the kettle body 2 is cylindrical, the kettle cover 1 is in a shape of a cake, the outer diameter of the kettle cover 1 is consistent with the diameter of the outer edge bulge 103 of the kettle outer layer, and a plurality of matched fixing bolt openings 102 with the same diameter and the same position are arranged at the positions of the kettle cover 1 and the outer edge bulge 103 of the outer layer. Referring to fig. 1, the height of the outer layer 201 and the inner layer 203 of the kettle 2 at the open end of the kettle 2 is the same, and the height of the heating layer 202 at the open end of the kettle 2 is lower than the height of the inner layer 203, so that the inner layer 201, the heating layer 202 and the outer layer 203 form a groove. The inner side of the kettle cover 1 is provided with two sealing grooves 101 which are concentric annular grooves, the width of the outer sealing groove 101 is equal to the thickness of the kettle outer layer 201, the width of the inner sealing groove 101 is equal to the thickness of the kettle inner layer 203, the depths of the two sealing grooves 101 are equal to the depth of the opening side recess of the kettle body 2 and the opening end edge of the kettle body 2, from the opening end edge of the kettle body 2 to the opening end edge of the kettle outer layer 201, of the kettle outer edge bulge 103, and the sealing device of the kettle cover 1 can be formed by the two grooves and the bulge between the two grooves. The fixing part 601 of the kettle cover 1 is fixed on the inner side of the kettle cover and is in an annular bulge, and the inner diameter of the annular bulge is equal to the outer diameter of the transmission shaft 502, so that the stirring device can be well fixed by the fixing part. Wherein, set up transmission shaft 502 as the cavity tubular, and the pipe wall is equipped with a plurality of unidirectional cloth gas pockets 504, and mounting 601 on the lid 1 is located the inboard center department of lid 1, connects lid 1 and transmission shaft 502, is equipped with intake pipe 6 on the lid 1, passes mounting 601 and communicates with each other with transmission shaft 502. The stirring paddle 503 of the graphene stripping device is a bar-type with alternate lengths, and ball milling media 7 are arranged in the gap between the inside of the kettle body 2 and the stirring device 5, and have different diameters ranging from 1mm to 10 mm. In this embodiment, the stripping means is either vertical or horizontal.

In the use process, the operation steps are as follows: firstly, placing a ball milling medium 7 in a kettle body 2; step two, matching and closing the kettle cover 1 and the kettle body 2, and tightly connecting the kettle cover 1 and the kettle body 2 together by using matched bolts through the fixed bolt holes 102 and screwing; thirdly, opening a feed inlet switching valve 301, closing a discharge outlet switching valve 401, and enabling the liquid solvent material mixed with graphite to enter the kettle body 2 through the feed inlet 3; fourth, according to the material condition, introducing atmosphere through an air inlet pipe 6, enabling the atmosphere to enter the kettle body 2 through a one-way air distribution hole 504 to form a certain pressure, and adjusting the air distribution amount through the indication of a pressure gauge 8; fifthly, heating the materials through a heating layer 202 of the kettle body 2, and adjusting and controlling the heating condition through the indication of a thermometer 9; sixthly, starting a motor 501 of the stirring device 5, so that a transmission shaft 502 rotates and drives a stirring paddle 503 to stir in the kettle body 2; seventh, after the reaction reaches a certain degree, the stirring device 5 is turned off, the heating layer 203 is stopped to heat, and the unidirectional air distribution holes 504 are stopped to supply air; eighth, the discharge port switch 401 is turned on to discharge the material from the discharge port 4. And obtaining the graphene product.

Example 2

Referring to fig. 4, the difference between this embodiment and embodiment 1 is that the stirring paddle 503 on the transmission shaft 502 of the graphene peeling apparatus is different.

In this embodiment, in order to improve the stirring effect, the prepared graphene defects are further reduced, and the graphene preparation effect is improved, and the stirring paddle 503 is set to be a screw type. The stirring effect of screw stirring rake is changed for the inside liquid of the 2 cavities of cauldron body is more even. The procedure was the same as in example 1.

Example 3

Referring to fig. 5 and 6, the difference between the present embodiment and embodiments 1 and 2 is that the kettle body 2 of embodiment 3 is provided with two chambers separated by a chamber partition 10. Ball milling media 7 with different diameters are respectively arranged in the two chambers.

Referring to fig. 5, in order to improve the stripping efficiency, a chamber partition board 10 fixed on the kettle body 2 is arranged in the middle of the inner chamber of the kettle body 2, and the chamber is divided into a first chamber 204 and a second chamber 205; a fan-shaped area screen 1001 is provided from the center point to the edge of the chamber partition 10, the area of the screen 1001 being no more than one quarter of the area of the chamber partition 10. Ball milling media 7 are spherical media of various diameters with large diameter media disposed in first chamber 204 and small diameter media disposed in second chamber 205. Thus, the graphite-dissolved liquid material can be initially exfoliated in the first chamber 204 and further exfoliated in the second chamber 205.

Referring to fig. 6, fig. 6 is a schematic cross-sectional view of the chamber partition plate in section A-A of embodiment 3 in fig. 5, wherein the mesh width of the screen 1001 is smaller than the minimum diameter of the ball milling media 7 in the second chamber 2005, and the screen 1001 is disposed in the fourth quadrant of the upper half of the chamber partition plate 10, and the area of the screen 1001 is not more than one-fourth of the area of the chamber partition plate 10; the feed port 3 is arranged at the top end of the first chamber 204 and is arranged at the first quadrant side of the chamber partition board 10; the discharge port 4 is arranged at the bottom end of the second chamber 205. Paddles 503 may be screw-type, turbine-type, or a combination of both.

In the use process, the operation steps are as follows: firstly, placing a ball milling medium 7 in a kettle body 2, wherein a large diameter is placed in a first chamber 204, and a small diameter is placed in a second chamber 205; step two, matching and closing the kettle cover 1 and the kettle body 2, and tightly connecting the kettle cover 1 and the kettle body 2 together by using matched bolts through the fixed bolt holes 102 and screwing; third, the feed inlet switching valve 301 is opened, the discharge outlet switching valve 401 is closed, and the liquid solvent material mixed with graphite enters the first chamber 204 through the feed inlet 3; fourth, according to the material condition, introducing atmosphere through an air inlet pipe 6, enabling the atmosphere to enter the kettle body 2 through a one-way air distribution hole 504 to form a certain pressure, and adjusting the air distribution amount through the indication of a pressure gauge 8; fifthly, heating the materials through a heating layer 202 of the kettle body 2, and adjusting and controlling the heating condition through the indication of a thermometer 9; sixthly, starting a motor 501 of the stirring device 5, so that a transmission shaft 502 rotates and drives a stirring paddle 503 to stir in the kettle body 2; seventh, as the stripping process is performed, the liquid solvent is primarily stripped under the action of the large-diameter grinding medium 7 in the first chamber 204, flows into the second chamber 205 through the filter screen 1001, and is further finely ground under the action of the small-diameter grinding medium 7, so that high-quality graphene is obtained; eighth, the stirring device 5 is turned off, the heating layer 203 is stopped to heat, and the unidirectional air distribution holes 504 are stopped to supply air; and ninth, opening a discharge port switch 401 to discharge the material from the discharge port 4. And obtaining the graphene product.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims (9)

1. The utility model provides a graphite alkene stripping off device, includes cauldron lid, cauldron body, ball-milling medium, its characterized in that: the kettle cover is detachably connected to the kettle body and comprises a kettle sealing groove, a fixing bolt hole and a fixing piece; the kettle body comprises a kettle outer layer, a heating layer, a kettle inner layer, a stirring device, a feed inlet and a discharge outlet, wherein the feed inlet is provided with a feed inlet switch valve, and the end part of the discharge outlet is provided with a discharge outlet switch valve; the outer edge of the outer layer of the kettle is convex and provided with a through fixing bolt opening; the ball milling medium is arranged in the gap between the inner part of the kettle body and the stirring device; the stirring device comprises a transmission shaft, a motor and a stirring paddle, wherein the transmission shaft is arranged at the central shaft in the kettle body, and the motor is arranged outside the kettle body and is connected with the transmission shaft through the center of the bottom of the kettle; the stirring paddles are provided with a plurality of stirring paddles and are fixedly connected with the transmission shaft in the vertical direction of the transmission shaft; the kettle body is provided with a pressure gauge and a thermometer; the transmission shaft is hollow and tubular, and the pipe wall is provided with a plurality of unidirectional air distribution holes; the fixing piece on the kettle cover is positioned at the center of the inner side of the kettle cover and is connected with the kettle cover and the transmission shaft, and the kettle cover is provided with an air inlet pipe which penetrates through the fixing piece and is communicated with the transmission shaft.

2. The graphene peeling apparatus according to claim 1, wherein: the kettle body is cylindrical, the kettle cover is cake-shaped, the outer diameter of the kettle cover is consistent with the outer diameter of the bulge at the outer edge of the kettle outer layer of the kettle body, and a plurality of matched fixing bolt openings with the same diameter and the same position are arranged at the bulge at the outer edge of the kettle cover and the outer edge of the kettle outer layer; the heating layer of the kettle body is positioned between the kettle inner layer and the kettle outer layer and is tightly connected, the heights of the kettle outer layer and the kettle inner layer at the opening end of the kettle body are the same, and the height of the heating layer at the opening end of the kettle body is lower than that of the kettle inner layer, so that a groove is formed among the kettle inner layer, the heating layer and the kettle outer layer; the kettle cover is characterized in that two sealing grooves are formed in the inner side of the kettle cover and are concentric annular grooves, the width of each sealing groove in the outer side is equal to the thickness of the outer layer of the kettle, the width of each sealing groove in the inner side is equal to the thickness of the inner layer of the kettle, the depths of the two sealing grooves are equal to the depth of the opening side of the heating layer on the kettle body and the depth of the opening side edge of the convex kettle body at the outer edge of the kettle to the edge of the opening side of the outer layer of the kettle, the sealing grooves can be matched with the positions of the inner layer of the kettle and the outer layer of the kettle, and the two sealing grooves and the bulges between the sealing grooves form a sealing device of the kettle cover.

3. The graphene peeling apparatus according to claim 1, wherein: the fixing piece of the kettle cover is fixed on the inner side of the kettle cover and is an annular bulge, and the inner diameter of the annular bulge is equal to the outer diameter of the transmission shaft.

4. The graphene peeling apparatus according to claim 1, wherein: the stirring paddle is any one type or combination of different types of bar type, screw type, turbine type and frame type with alternate lengths.

5. The graphene peeling apparatus according to claim 1, wherein: the ball milling medium diameter is between 1mm and 10 mm.

6. The graphene peeling apparatus according to claim 1, wherein: the stripping device is vertical or horizontal.

7. The graphene peeling apparatus according to claim 1, wherein: a chamber partition board fixed on the kettle body is arranged in the middle of the chamber in the kettle body to divide the chamber into a first chamber and a second chamber; a sector area filter screen is arranged from the center point to the edge of the chamber partition plate, and the area of the filter screen is not more than one quarter of the area of the chamber partition plate.

8. The graphene peeling apparatus according to claim 7, wherein: the ball milling medium is a spherical medium with various diameters, a large-diameter medium is arranged in the first cavity, and a small-diameter medium is arranged in the second cavity; the mesh width of the filter screen is smaller than the minimum diameter of ball milling media in the second chamber, the filter screen is arranged at the fourth quadrant of the upper half part of the chamber partition board, and the area of the filter screen is not more than one fourth of the area of the chamber partition board; the feeding port is arranged at the top end of the first chamber and is arranged at the first quadrant side of the chamber partition plate; the discharge gate is located second cavity bottom.

9. The graphene peeling apparatus according to claim 8, wherein: the stirring paddle is in a screw type, turbine type or a combination mode of the screw type and the turbine type.

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