Preparation method of graphene slurry

Abstract

The present invention relates to the technical field of graphene slurry preparation, and discloses a graphene slurry preparation method, which comprises: forming a solvent atomization distribution region at a set region in a mixing mechanism through a solvent atomization mechanism; spraying a graphene raw material to the solvent atomization distribution area at a set flow rate to form primary graphene slurry; grinding the primary graphene slurry through a ring type grinding mechanism to form a finished product graphene slurry; the solvent atomizing area which is horizontally distributed and axially polymerized is arranged in the mixing mechanism, and the graphene raw material is uniformly sprayed to the solvent atomizing area at a set flow speed, so that the graphene raw material can be fully contacted and mixed with the atomized solvent in the descending process, and the graphene raw material is discharged in the discharging process. Graphene slurry is subjected to multiple sufficient grinding through the ring type grinding mechanism, so that the mixing sufficiency can be effectively improved, the mixing time can be shortened, and the mixing efficiency and the mixing effect can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of graphene slurry preparation, and more specifically, it relates to a method for preparing graphene slurry. Background Art

[0002] Graphene has excellent optical, electrical, and mechanical properties due to its special bonding structure and electron arrangement.

[0003] The main components of graphene slurry are graphene and a solvent. Graphene is dispersed in the solvent to form a uniform liquid mixture, which is the graphene slurry.

[0004] In the preparation process of graphene slurry, a common method is to mix graphene raw materials and a solvent in a certain proportion to obtain graphene slurry with the required concentration. Whether graphene and the solvent are fully mixed is the main factor to ensure the quality of graphene slurry. However, the current common auxiliary mixing method is mainly stirring, but there are still stirring dead corners during the stirring process. In order to ensure full mixing, the stirring time needs to reach the set time to ensure the degree of mixing, and the efficiency is low. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for preparing graphene slurry to solve the above problems.

[0006] The present invention provides a method for preparing graphene slurry, which includes the following steps: Step 100: Introduce a prefabricated solvent into a solvent atomization mechanism, and form a solvent atomization distribution area at a set area in a mixing mechanism through the solvent atomization mechanism; Step 200: Spray graphene raw materials at a set flow rate onto the solvent atomization distribution area to form a preliminary graphene slurry; Step 300: By arranging an annular grinding mechanism at the bottom of the mixing mechanism, when the preliminary graphene slurry flows through the annular grinding mechanism, the annular grinding mechanism grinds the preliminary graphene slurry to form a finished graphene slurry.

[0007] As a further optimization scheme of the present invention, the graphene raw materials include one or more of natural graphite and chemically modified graphite.

[0008] As a further optimization scheme of the present invention, the solvent includes one or more of deionized water, NMP, DMF, isopropanol, and waterborne polyurethane.

[0009] A graphene slurry preparation device for implementing the above-mentioned method for preparing graphene slurry includes: Frame; Mixing mechanism, the mixing mechanism includes a mixing barrel installed on the frame, a feeding port and an exhaust pipe arranged at the upper end of the mixing barrel, and a discharge pipe connected to the lower end of the mixing barrel. The exhaust pipe is used to introduce graphene raw materials at a set flow rate; Solvent atomization mechanism, the solvent atomization mechanism includes a downward-opening type guiding component connected to the inner wall of the mixing barrel and an annular atomization component arranged on the downward-opening type guiding component. The input end of the downward-opening type guiding component is communicated with the exhaust pipe, and the annular atomization component is used to form a solvent atomization distribution area at a set area of the downward-opening type guiding component; Annular grinding mechanism, the annular grinding mechanism includes a centrifugal discharging component arranged at the bottom position of the mixing barrel, a spliced annular grinding component connected to the downward-opening type guiding component, and a vertical driving component connected to the centrifugal discharging component. When the graphene raw materials pass through the solvent atomization distribution area, primary graphene slurry is formed. The primary graphene slurry passes through the middle position of the spliced annular grinding component and drips onto the centrifugal discharging component. The centrifugal discharging component is used to transport the primary graphene slurry to the inner wall of the mixing barrel for transportation. The vertical driving component is used to drive the spliced annular grinding component to vibrate up and down. When the spliced annular grinding component vibrates up and down, it is used to grind the primary graphene slurry flowing through the spliced annular grinding component.

[0010] As a further optimized solution of the present invention, the downward-opening type guiding component includes a downward-opening type cavity shell fixedly connected to the inner wall of the mixing barrel and a connecting pipe connected to the upper end of the downward-opening type cavity shell. The feeding port is communicated with the internal space of the downward-opening type cavity shell through the connecting pipe.

[0011] As a further optimized solution of the present invention, the annular atomization component includes a booster pump connected to the outer wall of the downward-opening type cavity shell, an annular liquid guiding pipe connected to the output end of the booster pump, and a plurality of atomizing nozzles connected to the inner wall of the downward-opening type cavity shell. The booster pump is used to introduce the solvent into the annular liquid guiding pipe at a set flow rate. The plurality of atomizing nozzles are evenly distributed on the inner wall of the downward-opening type cavity shell, and the input ends of the plurality of atomizing nozzles are all communicated with the annular liquid guiding pipe.

[0012] As a further optimized solution of the present invention, the centrifugal discharging component includes an annular support track fixedly connected to the bottom of the mixing barrel, an upward-opening type cavity shell movably connected to the annular support track, a plurality of discharging holes arranged at a position close to the bottom of the side wall of the upward-opening type cavity shell, a motor two fixedly connected to the frame, a bearing installed on the frame, and a transmission shaft connected to the output shaft end of the motor two. The other end of the transmission shaft sequentially passes through the bearing, the mixing barrel and the annular support track and is fixedly connected to the upward-opening type cavity shell. The plurality of discharging holes are evenly distributed, and the upper opening of the upward-opening type cavity shell is in contact with the lower opening of the downward-opening type cavity shell.

[0013] As a further optimized solution of the present invention, the spliced annular grinding assembly includes a spliced bracket fixedly connected to the inner wall of the lower-opening cavity shell near the lower opening and a plurality of vertical grinding assemblies slidably connected to the spliced bracket; The spliced bracket includes a plurality of annular brackets arranged coaxially and parallel to each other and a plurality of connecting rods. The diameters of the plurality of annular brackets decrease in sequence. The adjacent two annular brackets and between the annular bracket with the largest diameter and the inner wall of the lower-opening cavity shell are fixedly connected through connecting rods. The plurality of vertical grinding assemblies are evenly distributed on the plurality of annular brackets, and the adjacent two vertical grinding assemblies are in contact with each other.

[0014] As a further optimized solution of the present invention, the vertical grinding assembly includes a vertical rod slidably connected to the annular bracket, a conical support member and a plurality of grinding beads connected to the vertical rod in sequence from top to bottom, and a spring fixedly connected between the conical support member and the annular bracket. There is a gap between the plurality of grinding beads.

[0015] As a further optimized solution of the present invention, the vertical driving assembly includes a plurality of wedges fixedly connected to the bottom of the upper-opening cavity shell. The number of wedges is half of the number of vertical rods. The wedges are arranged corresponding to the vertical rods. When the wedge passes through the corresponding vertical rod, it is used to drive the corresponding vertical rod to move upward a set distance along the vertical direction.

[0016] The beneficial effects of the present invention are as follows: In the present invention, a solvent atomization area with a horizontal distribution and axial aggregation mode is arranged in the mixing mechanism, and the graphene raw material is uniformly sprayed into the solvent atomization area at a set flow rate, so that the graphene raw material can fully contact and mix with the atomized solvent during the falling process, and during the discharging process, the graphene slurry is subjected to multiple and sufficient grinding by the ring-type grinding mechanism, thereby effectively improving the mixing sufficiency and reducing the mixing time, and effectively improving the mixing efficiency and mixing effect. Description of the Drawings

[0017] Figure 1 is the process flow chart of the present invention; Figure 2 is the overall structure schematic diagram of the present invention; Figure 3 is of the present invention Figure 2 right view; Figure 4 is the matching view of the raw material conveying mechanism and the pump air mechanism of the present invention; Figure 5 is of the present invention Figure 3 cross-sectional view at A-A in; Figure 6 is the matching view of the solvent atomization mechanism and the ring-type grinding mechanism of the present invention; Figure 7 is the enlarged view of position B in Figure 6 of the present invention; Figure 8 is the enlarged view of position C in Figure 6 of the present invention; Figure 9 is the mating view of the spliced support and the vertical grinding assembly of the present invention; Figure 10 is the enlarged view of position D in Figure 9 of the present invention; Figure 11 is the enlarged view of position E in Figure 9 of the present invention.

[0018] In the figure: 1. Frame; 2. Mixing mechanism; 201. Mixing barrel; 202. Exhaust pipe; 203. Discharge pipe; 3. Storage mechanism; 301. Storage funnel; 302. Feed opening; 303. Dust cover; 304. Electric control valve; 305. Feed pipe; 4. Raw material conveying mechanism; 401. Raw material conveying pipe; 402. Motor I; 403. Three-way pipe; 404. Auger; 5. Air pumping mechanism; 501. Air pump; 502. Gas conveying pipe; 6. Solvent prefabrication mechanism; 601. Container; 602. Solution conveying pipe I; 603. Solution conveying pipe II; 604. Solution conveying pipe III; 605. Stirrer; 7. Solvent atomization mechanism; 701. Lower-opening cavity shell; 702. Connecting pipe; 703. Annular liquid guiding pipe; 704. Atomizing nozzle; 8. Ring-type grinding mechanism; 801. Annular support track; 802. Upper-opening cavity shell; 803. Spliced support; 8030. Annular support; 8031. Connecting rod; 804. Vertical grinding assembly; 8040. Vertical rod; 8041. Conical support; 8042. Spring; 8043. Grinding beads; 805. Discharge hole; 806. Motor II; 807. Transmission shaft; 808. Bearing; 809. Wedge block. Detailed implementation mode

[0019] Now, the subject matter described herein will be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein. Additionally, features described relative to some examples may be combined in other examples.

[0020] Embodiment 1 As Figure 1 shown, a method for preparing graphene slurry includes the following steps: Step 100: Introduce the prefabricated solvent into the solvent atomization mechanism 7, and form a solvent atomization distribution area at a set area in the mixing mechanism 2 through the solvent atomization mechanism 7; Step 200: Spray the graphene raw material into the solvent atomization distribution area at a set flow rate to form a preliminary graphene slurry; Step 300: By arranging an annular grinding mechanism 8 at the bottom of the mixing mechanism 2, when the preliminary graphene slurry flows through the annular grinding mechanism 8, the annular grinding mechanism 8 grinds the preliminary graphene slurry to form a finished graphene slurry.

[0021] Among them, the graphene raw material includes one or more of natural graphite and chemically modified graphite.

[0022] Among them, the solvent includes one or more of deionized water, NMP, DMF, isopropyl alcohol, and waterborne polyurethane.

[0023] It should be noted that a solvent atomization distribution area in a horizontal distribution and axial aggregation manner is arranged in the mixing mechanism 2, and the graphene raw material is uniformly sprayed into the solvent atomization distribution area at a set flow rate, so that the graphene raw material can fully contact and mix with the atomized solvent during the descending process, and during the discharging process, the annular grinding mechanism 8 fully grinds the graphene slurry, thereby effectively improving the mixing sufficiency and reducing the mixing duration, and effectively improving the mixing efficiency and mixing effect.

[0024] Embodiment 2 As Figures 2 - 11 shown, a graphene slurry preparation device for implementing a graphene slurry preparation method described in Embodiment 1 includes: Frame 1; Mixing mechanism 2, the mixing mechanism 2 includes a mixing barrel 201 installed on the frame 1, a feed inlet and an exhaust pipe 202 provided at the upper end of the mixing barrel 201, and a discharge pipe 203 connected to the lower end of the mixing barrel 201, and the exhaust pipe 202 is used to introduce the graphene raw material at a set flow rate; Solvent atomization mechanism 7, the solvent atomization mechanism 7 includes a lower-opening type guiding component connected to the inner wall of the mixing barrel 201 and an annular atomization component provided on the lower-opening type guiding component, the input end of the lower-opening type guiding component is communicated with the exhaust pipe 202, and the annular atomization component is used to form a solvent atomization distribution area at a set area of the lower-opening type guiding component; The ring-type grinding mechanism 8 includes a centrifugal discharging component disposed at the bottom of the mixing barrel 201, a spliced ring-type grinding component connected to the lower-opening type feeding component, and a vertical driving component connected to the centrifugal discharging component. When the graphene raw material passes through the solvent atomization distribution area, a preliminary graphene slurry is formed. The preliminary graphene slurry passes through the middle position of the spliced ring-type grinding component and drips onto the centrifugal discharging component. The centrifugal discharging component is used to convey the preliminary graphene slurry to the inner wall of the mixing barrel 201. The vertical driving component is used to drive the spliced ring-type grinding component to vibrate up and down. When the spliced ring-type grinding component vibrates up and down, it is used to grind the preliminary graphene slurry flowing through the spliced ring-type grinding component.

[0025] It should be noted that when mixing the graphene raw material and the solvent to prepare the graphene slurry, by introducing the pre-prepared solvent into the ring-type atomization component, the solvent is atomized and sprayed into the lower-opening type feeding component through the ring-type atomization component, and a solvent atomization distribution area is formed at a set area inside the lower-opening type feeding component. At a set delay or an early time point of the start time of the ring-type atomization component, the graphene raw material is sprayed into the solvent atomization distribution area at a set flow rate, so that the time point when the solvent atomization distribution area is formed can be in contact and mixed with the graphene raw material in an atomization mode, which can effectively improve the mixing degree and efficiency of the graphene raw material and the solvent. As the graphene raw material contacts and mixes with the atomized solvent, a preliminary graphene slurry begins to be continuously formed and drips onto the bottom center position of the centrifugal discharging component. As the centrifugal discharging component rotates continuously, under the action of centrifugal force, the preliminary graphene slurry deposited on the centrifugal discharging component begins to flow towards the peripheral edge of the centrifugal discharging component, and during this process, it flows through the spliced ring-type grinding component. As the centrifugal discharging component rotates, the spliced ring-type grinding component is driven by the vertical driving component to continuously produce a vertical shearing grinding effect, which can perform multiple and sufficient grinding treatments on the flowing preliminary graphene slurry, thereby forming a finished graphene slurry and effectively shortening the preparation time. It should be noted that since the rotation speed of the centrifugal discharging component is adjustable and does not exceed the set speed, there will be no situation where the dripping preliminary graphene slurry flows away from the gap between the spliced ring-type grinding component and the vertical driving component. The deposition situation is mostly that the preliminary graphene slurry forms a conical-shaped accumulation body and gradually flows and spreads to most of the space near the bottom of the centrifugal discharging component.

[0026] In an optional embodiment of the present invention, as Figures 5 - 7As shown in the figure, the lower-opening type material guiding assembly includes a lower-opening type cavity shell 701 fixedly connected to the inner wall of the mixing barrel 201 and a connecting pipe 702 connected to the upper end of the lower-opening type cavity shell 701. The feeding port is communicated with the inner space of the lower-opening type cavity shell 701 through the connecting pipe 702.

[0027] The annular atomizing assembly includes a booster pump connected to the outer wall of the lower-opening type cavity shell 701, an annular liquid guiding pipe 703 connected to the output end of the booster pump, and a plurality of atomizing nozzles 704 connected to the inner wall of the lower-opening type cavity shell 701. The booster pump is used to introduce the solvent into the annular liquid guiding pipe 703 at a set flow rate. The plurality of atomizing nozzles 704 are evenly distributed on the inner wall of the lower-opening type cavity shell 701, and the input ends of the plurality of atomizing nozzles 704 are all communicated with the annular liquid guiding pipe 703.

[0028] It should be noted that, as described above, the prefabricated solvent is introduced into the booster pump, and under the action of the booster pump, it surges into the annular liquid guiding pipe 703 at a set flow rate and sprays from the plurality of atomizing nozzles 704 towards the middle area of the lower-opening type cavity shell 701. The sprayed atomized solvent gathers in the middle area of the lower-opening type cavity shell 701 and forms a dense and uniform solvent atomization distribution area. The graphene raw material is sprayed from the connecting pipe 702 to the solvent atomization distribution area at a set flow rate. The graphene raw material is in an atomized state and comes into contact and mixes with the atomized solvent. The mixing force is comprehensively formed by the wind force vertically transporting the graphene raw material and the axial jet force of the atomized solvent spraying, which can effectively improve the mixing efficiency of the graphene raw material and the solvent.

[0029] In an alternative embodiment of the present invention, as Figures 5 - 6 and Figure 8 shown, the centrifugal discharging assembly includes an annular support track 801 fixedly connected to the bottom of the mixing barrel 201, an upper-opening type cavity shell 802 movably connected to the annular support track 801, a plurality of discharging holes 805 provided at a position near the bottom of the side wall of the upper-opening type cavity shell 802, a motor two 806 fixedly connected to the frame 1, a bearing 808 installed on the frame 1, and a transmission shaft 807 connected to the output shaft end of the motor two 806. The other end of the transmission shaft 807 sequentially passes through the bearing 808, the mixing barrel 201 and the annular support track 801 and is fixedly connected to the upper-opening type cavity shell 802. The plurality of discharging holes 805 are evenly distributed, and the upper opening of the upper-opening type cavity shell 802 is in contact with the lower opening of the lower-opening type cavity shell 701.

[0030] It should be noted that, as described above, the as-prepared graphene slurry drips onto the bottom of the upper-open cavity shell 802 and starts to flow when the accumulation amount increases and enters the area covered by the spliced ring-shaped grinding assembly. During the process of the second motor 806 driving the transmission shaft 807 and the upper-open cavity shell 802 to rotate, the upper-open cavity shell 802 can drive the vertical adjustment assembly connected to its bottom to rotate in the same direction and at the same angle. During the rotation of the vertical adjustment assembly, it can continuously drive the spliced ring-shaped grinding assembly to perform a vertical shearing motion, so as to fully grind the as-prepared graphene slurry flowing through the spliced ring-shaped grinding assembly, thereby enabling continuous feeding and discharging, realizing the continuous mixing and preparation process of graphene slurry, and effectively improving the efficiency and output.

[0031] In an alternative embodiment of the present invention, as Figures 8 - 11 shown, the spliced ring-shaped grinding assembly includes a spliced bracket 803 fixedly connected to the inner wall of the lower-open cavity shell 701 near the lower opening and a plurality of vertical grinding assemblies 804 slidably connected to the spliced bracket 803; The spliced bracket 803 includes a plurality of coaxially and parallelly arranged annular brackets 8030 and a plurality of connecting rods 8031. The diameters of the plurality of annular brackets 8030 decrease in sequence. The adjacent two annular brackets 8030 and between the annular bracket 8030 with the largest diameter and the inner wall of the lower-open cavity shell 701 are fixedly connected by the connecting rods 8031. The plurality of vertical grinding assemblies 804 are evenly distributed on the plurality of annular brackets 8030, and the adjacent two vertical grinding assemblies 804 are in contact with each other.

[0032] The vertical grinding assembly 804 includes a vertical rod 8040 slidably connected to the annular bracket 8030, a conical support 8041 and a plurality of grinding beads 8043 connected to the vertical rod 8040 in sequence from top to bottom, and a spring 8042 fixedly connected between the conical support 8041 and the annular bracket 8030. There is a gap between the plurality of grinding beads 8043.

[0033] The vertical driving assembly includes a plurality of wedges 809 fixedly connected to the bottom of the upper-open cavity shell 802. The number of wedges 809 is half of the number of vertical rods 8040. The wedges 809 are arranged corresponding to the vertical rods 8040. When the wedges 809 pass through the corresponding vertical rods 8040, they are used to drive the corresponding vertical rods 8040 to move upward by a set distance along the vertical direction.

[0034] It should be noted that, as described above, the vertical driving component rotates with the upper-opening cavity shell 802. That is, when several wedges 809 connected to the bottom of the upper-opening cavity shell 802 rotate with the upper-opening cavity shell 802, they can simultaneously drive half of the number of vertical rods 8040 to move upward. The half of the number of vertical rods 8040 are the half of the number of vertically distributed vertical rods 8040 at intervals. Specifically, when the wedge 809 moves to the corresponding vertical rod 8040, under the action of the wedge surface, the vertical rod 8040 is continuously lifted. At this time, the conical support 8041 on the vertical rod 8040 moves synchronously with the vertical rod 8040 and begins to compress the spring 8042, and several grinding beads 8043 on the vertical rod 8040 move synchronously upward with the vertical rod 8040. During this process, the shear displacement of the vertical rods 8040 that are not lifted and the vertical rods 8040 that are lifted can continuously grind the as-prepared graphene slurry existing between the grinding beads 8043. When the wedge 809 disengages from the corresponding vertical rod 8040, the spring 8042 resets, and the reverse shear displacement can be repeated for secondary grinding and generate a small amplitude of vibration to achieve the grinding effect of multiple small displacements. Similarly, as the wedge 809 continuously moves, the corresponding vertical rod 8040 can be continuously driven to move up and down, and with the cooperation of a small amplitude of vibration, sufficient grinding treatment can be effectively achieved.

[0035] In an alternative embodiment of the present invention, as Figures 2 - 5 shown, a graphene slurry preparation device further includes: A storage mechanism 3, which includes a storage funnel 301 installed on the frame 1, a feeding port 302 provided at the top of the storage funnel 301, a dust-proof cover 303 movably installed at the feeding port 302, an electric control valve 304 connected to the bottom of the storage funnel 301, and a feeding pipe 305 connected to the other end of the electric control valve 304. The feeding pipe 305 is connected to the input end of the raw material conveying mechanism 4; A raw material conveying mechanism 4, which includes a raw material conveying pipe 401 connected to the frame 1, a motor 402 connected to one end of the raw material conveying pipe 401, a three-way pipe 403 connected to the output end of the motor 402, and a auger 404 movably connected to the motor 402. The auger 404 is connected to the output shaft end of the motor 402. The input end of the motor 402 is connected to the feeding pipe 305, and the output end of the three-way pipe 403 is communicated with the feeding port; A pump air mechanism 5, which includes an air pump 501 installed on the frame 1 and a gas conveying pipe 502 connected to the output end of the air pump 501. The other end of the gas conveying pipe 502 is connected to another input end of the three-way pipe 403.

[0036] It should be noted that the prefabricated graphene raw material can be stored inside the storage hopper 301. The amount of graphene raw material output to the tee 403 can be controlled by the electric control valve 304 and the first motor 402. And a gas with a set flow rate is introduced into the gas delivery pipe 502 through the air pump 501. The gas sprays a set amount of graphene raw material into the solvent atomization distribution area, so as to achieve efficient mixing.

[0037] In an alternative embodiment of the present invention, as Figures 2 - 5 shown, a graphene slurry preparation device further includes: a solvent prefabrication mechanism 6, which includes a container 601 connected to the frame 1, a first solution delivery pipe 602, a second solution delivery pipe 603, and a third solution delivery pipe 604 connected to the container 601, and a stirrer 605 installed on the container 601. The output end of the third solution delivery pipe 604 is connected to the input end of the booster pump; It should be noted that the constituent raw materials of the solvent can be introduced into the container 601 through the second solution delivery pipe 603 and the third solution delivery pipe 604, and the stirrer 605 fully stirs the solvent constituent raw materials stored in the container 601, so as to achieve the prefabrication and storage of the solvent. When it is necessary to form a solvent atomization distribution area in the lower open cavity housing 701, the prefabricated solvent can be delivered to the booster pump through the third solution delivery pipe 604.

[0038] The above has described this embodiment, but this embodiment is not limited to the above specific implementation manners. The above specific implementation manners are only illustrative and not restrictive. Under the inspiration of this embodiment, those of ordinary skill in the art can also make many forms, all of which fall within the protection scope of this embodiment.

Claims

1. A method for preparing a graphene slurry, characterized in that: The following steps are involved: Step 100, introducing the prefabricated solvent into the solvent atomizing mechanism, and forming a solvent atomizing distribution area at a set area in the mixing mechanism through the solvent atomizing mechanism; Step 200, spraying the graphene raw material to the solvent atomization distribution area at a set flow rate to form a primary graphene slurry; Step 300: a ring-type grinding mechanism is provided at the bottom of the mixing mechanism. When the primary graphene slurry flows through the ring-type grinding mechanism, the ring-type grinding mechanism grinds the primary graphene slurry to form a finished graphene slurry.

2. A method for preparing graphene slurry according to claim 1, characterized in that: The graphene raw material includes one or more of natural graphite and chemically modified graphite.

3. A method for preparing graphene slurry according to claim 2, characterized in that: The solvent includes one or more of deionized water, NMP, DMF, isopropanol, and waterborne polyurethane.

4. A graphene slurry preparation device, characterized in that: It is used to perform a method for preparing a graphene slurry as claimed in any one of claims 1 to 3, comprising: frame; A mixing mechanism, the mixing mechanism comprising a mixing barrel mounted on a frame, an inlet and an exhaust pipe provided at the upper end of the mixing barrel, and a discharge pipe connected to the lower end of the mixing barrel, the exhaust pipe being used to introduce graphene raw materials at a set flow rate; A solvent atomization mechanism, the solvent atomization mechanism comprising a lower opening material guide assembly connected to the inner wall of the mixing barrel and a ring-type atomization assembly arranged on the lower opening material guide assembly, the input end of the lower opening material guide assembly is connected to the exhaust pipe, and the ring-type atomization assembly is used to form a solvent atomization distribution area at a set area of ​​the lower opening material guide assembly; An annular grinding mechanism, the annular grinding mechanism includes a centrifugal discharge assembly arranged at the bottom of a mixing barrel, a spliced ​​annular grinding assembly connected to a lower opening type material guide assembly, and a vertical drive assembly connected to the centrifugal discharge assembly. When the graphene raw material passes through the solvent atomization distribution area, a preliminary graphene slurry is formed. The preliminary graphene slurry passes through the middle position of the spliced ​​annular grinding assembly and drips to the centrifugal discharge assembly. The centrifugal discharge assembly is used to transport the preliminary graphene slurry to the inner wall of the mixing barrel for transportation. The vertical drive assembly is used to drive the spliced ​​annular grinding assembly to vibrate up and down. When the spliced ​​annular grinding assembly vibrates up and down, it is used to grind the preliminary graphene slurry flowing through the spliced ​​annular grinding assembly.

5. A graphene slurry preparation device according to claim 4, characterized in that: The lower opening material guiding assembly comprises a lower opening cavity shell fixedly connected to the inner wall of the mixing barrel and a connecting pipe connected to the upper end of the lower opening cavity shell, and the material inlet is connected to the inner space of the lower opening cavity shell through the connecting pipe.

6. A graphene slurry preparation device according to claim 5, characterized in that: The annular atomization assembly includes a booster pump connected to the outer wall of the lower open cavity shell, an annular liquid guide tube connected to the output end of the booster pump, and a plurality of atomizing nozzles connected to the inner wall of the lower open cavity shell. The booster pump is used to introduce the solvent into the annular liquid guide tube at a set flow rate. The plurality of atomizing nozzles are evenly distributed on the inner wall of the lower open cavity shell, and the input ends of the plurality of atomizing nozzles are all connected to the annular liquid guide tube.

7. A graphene slurry preparation device according to claim 6, characterized in that: The centrifugal discharge assembly includes an annular support track fixedly connected to the bottom of the mixing barrel, an upper open chamber shell movably connected to the annular support track, a plurality of discharge holes arranged on the side wall of the upper open chamber shell near the bottom, a second motor fixedly connected to the frame, a bearing installed on the frame, and a transmission shaft connected to the output shaft end of the second motor, the other end of the transmission shaft passes through the bearing, the mixing barrel and the annular support track in sequence and is fixedly connected to the upper open chamber shell, the plurality of discharge holes are evenly distributed, and the upper end opening of the upper open chamber shell is in contact with the lower end opening of the lower open chamber shell.

8. A graphene slurry preparation device according to claim 7, characterized in that: The spliced ​​annular grinding assembly comprises a spliced ​​bracket fixedly connected to the inner wall of the lower opening chamber shell near the lower end opening and a plurality of vertical grinding assemblies slidably connected to the spliced ​​bracket; The spliced ​​bracket includes a plurality of coaxial and parallel annular brackets and a plurality of connecting rods. The diameters of the annular brackets decrease successively. Two adjacent annular brackets and the annular bracket with the largest diameter are fixedly connected to the inner wall of the lower open chamber shell by connecting rods. The plurality of vertical grinding assemblies are evenly distributed on the plurality of annular brackets, and two adjacent vertical grinding assemblies are in contact with each other.

9. A graphene slurry preparation device according to claim 8, characterized in that: The vertical grinding assembly includes a vertical rod slidably connected to the annular bracket, a conical support and a plurality of grinding beads connected to the vertical rod in sequence from top to bottom, and a spring fixedly connected between the conical support and the annular bracket, and gaps are provided between the plurality of grinding beads.

10. A graphene slurry preparation device according to claim 9, characterized in that: The vertical drive assembly includes a plurality of wedge blocks fixedly connected to the bottom of the upper open cavity shell, the number of the wedge blocks is half the number of the vertical rods, the wedge blocks are arranged corresponding to the vertical rods, and when the wedge blocks pass through the corresponding vertical rods, they are used to drive the corresponding vertical rods to move vertically by a set distance.

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