Graphene slurry spin-coating device

Abstract

The utility model discloses a graphene slurry spin coating device which comprises a motor, a roller, a discharging assembly and a drying assembly, the roller is connected to an output shaft of the motor, the discharging assembly is arranged in the roller so as to supply materials to a base material attached to the inner wall of the roller, and the drying assembly is arranged on the inner wall of the roller. The drying assembly is arranged in the roller so as to dry the slurry on the base material. The device can well solve the problem that the thickness of the graphene film is not uniform in a traditional mode, the arrangement orientation of graphene sheet layers can be improved, and the performance and the yield of the graphene film are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of graphene slurry coating, in particular to a graphene slurry spin coating device. Background Art

[0002] At present, the common coating methods of graphene thermal conductive films on the market are mainly slit coating and blade coating. Slit coating is a method of coating the graphene slurry into a film by extruding it through a die. Due to the narrow and fixed-size die slit, the coating efficiency is low. However, the wider the die, the worse the uniformity of the slurry extrusion. Blade coating is the most common coating method. Blade coating mostly uses a comma scraper to introduce the slurry into the trough through a material pipe and use a scraper to level the slurry. However, due to the high viscosity of the graphene slurry and poor self-leveling effect, the slurry fluctuates after flowing from the material pipe into the trough, resulting in uneven thickness of the graphene film. In addition, there is air in the feed trough, and the air is mixed into the slurry, increasing the product defect rate. Utility Model Content

[0003] In order to overcome the defects in the prior art, the embodiment of the utility model provides a graphene slurry spin coating device, which can well solve the problem of uneven thickness of graphene film in traditional methods, and can increase the arrangement orientation of graphene sheets, thereby improving the performance and yield of graphene films.

[0004] The embodiment of the present application discloses: a graphene slurry spin coating device, comprising: a motor, a drum, a discharging assembly and a drying assembly, wherein the drum is connected to the output shaft of the motor, the discharging assembly is arranged inside the drum to feed material to a substrate attached to the inner wall of the drum, and the drying assembly is arranged inside the drum to dry the slurry on the substrate.

[0005] Specifically, the discharge assembly includes a first pipe and a plurality of atomizing nozzles connected to the first pipe, the interior of the first pipe includes relatively independent slurry pipelines, cooling water inlet pipelines and cooling water return pipelines, and the plurality of atomizing nozzles are connected to the slurry pipelines.

[0006] Specifically, the plurality of atomizing nozzles are evenly distributed along the axial direction of the first tube.

[0007] Specifically, the drying assembly includes a second tube and a plurality of hot air outlets connected to the second tube.

[0008] Specifically, the hot air outlet is also connected to a temperature sensor.

[0009] Specifically, one end of the drum facing away from the motor has an annular end wall.

[0010] Specifically, the drum has a door cover at one end away from the motor, and the door cover is provided with a first through hole for connecting the discharging assembly with the outside world, and the door cover is also provided with a second through hole for connecting the drying assembly with the outside world.

[0011] Specifically, the graphene slurry spin coating device also includes a cylindrical bracket, which is coaxially arranged with the roller, and a plurality of rubber rollers are arranged between the inner wall of the bracket and the outer wall of the roller.

[0012] Specifically, the drum is connected to the output shaft of the motor through a coupling.

[0013] The utility model has at least the following beneficial effects: the spin coating device of this embodiment adds a certain amount of slurry to the substrate on the inner wall of the drum through the discharge component. Driven by the motor, the substrate rotates continuously at a certain speed, and the coating thickness is controllable. It can well solve the problem of uneven thickness of the graphene film in the traditional method, and can increase the arrangement orientation of the graphene sheets, thereby improving the performance and yield of the graphene film.

[0014] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of a graphene slurry spin coating device in an embodiment of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the discharging assembly in the embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the drying assembly in the embodiment of the utility model;

[0019] Figure 4 is an arrangement orientation diagram of the graphene film coated by the spin coating device of this embodiment;

[0020] Figure 5 is the alignment orientation diagram of the slit-coated graphene film;

[0021] Figure 6 It is the alignment orientation diagram of the blade-coated graphene film.

[0022] The figure marks of the above drawings are: 1. Motor; 2. Drum; 3. Discharging assembly; 31. First pipe; 311. Slurry pipeline; 312. Cooling water inlet pipeline; 313. Cooling water return pipeline; 32. Atomizing nozzle; 4. Drying assembly; 41. Second pipe; 42. Hot air outlet; 43. Temperature sensor; 5. Door cover; 51. First through hole; 52. Second through hole; 53. Observation window; 6. Bracket; 7. Rubber roller; 8. Coupling. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "fixed", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0025] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "below" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0026] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

[0027] In addition, the terms "first", "second", etc. are only used to distinguish in description and have no special meaning.

[0028] like Figure 1 As shown, the graphene slurry spin coating device of this embodiment mainly includes: a motor 1, a roller 2, a discharging assembly 3 and a drying assembly 4. Among them, the roller 2 is fixedly connected to the output shaft of the motor 1 through a coupling 8, and the roller 2 can rotate under the drive of the motor 1; the discharging assembly 3 is arranged inside the roller 2, and is used to feed the substrate attached to the inner wall of the roller 2; the drying assembly 4 is arranged inside the roller 2, and is used to dry the slurry coated on the substrate.

[0029] Through the above structure, the spin coating device of this embodiment adds a certain amount of slurry to the substrate on the inner wall of the drum 2 through the discharge component 3. Driven by the motor 1, the substrate rotates continuously at a certain speed, and the coating thickness is controllable. It can well solve the problem of uneven thickness of the graphene film in the traditional method, and can increase the arrangement orientation of the graphene sheets, thereby improving the performance and yield of the graphene film.

[0030] Combination Figure 1 and Figure 2As shown, the discharging assembly 3 of the present embodiment includes a first tube 31 and a plurality of atomizing nozzles 32. The interior of the first tube 31 includes a relatively independent (relatively independent means that there is a wall surface in the first tube 31 for separating each pipeline) slurry pipeline 311, a cooling water inlet pipeline 312 and a cooling water return pipeline 313, the slurry pipeline 311 is used to transport the graphene slurry, and the tail end of the cooling water inlet pipe is connected to the head end of the cooling water return pipeline 313, so as to realize the circulation of cooling water. A plurality of atomizing nozzles 32 are connected to the first tube 31 and are respectively connected to the slurry pipeline 311, and the slurry in the slurry pipeline 311 can be sprayed on the surface of the substrate through the atomizing nozzle 32. Preferably, the plurality of atomizing nozzles 32 are evenly distributed along the axial direction of the first tube 31, which can improve the uniformity and efficiency of slurry spraying. By adopting the above scheme, the discharge component 3 of this embodiment includes a slurry pipeline 311 and a cooling water circulation structure arranged next to and in contact with the slurry pipeline 311. The water circulation structure can continuously cool the slurry to prevent the slurry from being in a high temperature state for a long time due to the influence of the drying component 4, thereby causing the slurry to condense into agglomerates and block the atomizing nozzle 32.

[0031] Specifically, Figure 3 As shown, the drying assembly 4 of this embodiment includes a second tube 41 and a plurality of hot air outlets 42. The second tube 41 is used to connect with the external hot air system and transport hot air. The plurality of hot air outlets 42 are evenly distributed on the second tube 41 along the axial direction. A temperature sensor 43 can also be provided at each hot air outlet 42 to visualize and adjust the temperature in the drum 2.

[0032] Preferably, the end of the roller 2 away from the motor 1 has a circular end wall (not shown), and the difference between the outer radius and the inner radius of the end wall is greater than the thickness of the substrate, which can prevent the slurry from overflowing from the end of the roller 2 away from the motor 1 during the spin coating process.

[0033] like Figure 1 As shown, the end of the drum 2 away from the motor 1 has a door cover 5, and the door cover 5 is provided with an observation window 53 and a first through hole 51 and a second through hole 52 arranged on both sides of the observation window 53. Among them, the observation window 53 is convenient for personnel to observe the situation inside the drum 2, the first through hole 51 is used for connecting the discharging assembly 3 with the external feeding system and cooling water system, and the second through hole 52 is used for connecting the drying assembly 4 with the external hot air system.

[0034] like Figure 1 As shown, the spin coating device of this embodiment further includes a cylindrical bracket 6, which is sleeved outside the roller 2 and coaxially arranged with the roller 2 to support the roller 2. The inner wall of the bracket 6 and the outer wall of the roller 2 are also provided with a plurality of rubber rollers 7, which can reduce the radial runout of the roller 2 when rotating, so that the graphene film is formed more uniformly.

[0035] To sum up, the working process of the graphene slurry spin coating device of this embodiment is as follows: the substrate is attached to the inner wall of the drum 2, the substrate surrounds the inner wall of the drum 2 for one circle, the motor 1 is turned on to increase the speed of the drum 2 to the target speed, and the drying component 4 is turned on at the same time until the inside of the drum 2 reaches a predetermined temperature, the slurry pipeline 311, the cooling water inlet pipeline 312 and the cooling water return pipeline 313 of the discharge component 3 are opened, and spin coating is started.

[0036] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A graphene slurry spin coating device, characterized in that: include: A motor, a drum, a discharging assembly and a drying assembly, wherein the drum is connected to the output shaft of the motor, the discharging assembly is arranged inside the drum to feed the substrate attached to the inner wall of the drum, and the drying assembly is arranged inside the drum to dry the slurry on the substrate.

2. The graphene slurry spin coating device according to claim 1, characterized in that: The discharging assembly includes a first pipe and a plurality of atomizing nozzles connected to the first pipe. The interior of the first pipe includes a relatively independent slurry pipeline, a cooling water inlet pipeline and a cooling water return pipeline. The plurality of atomizing nozzles are connected to the slurry pipeline.

3. The graphene slurry spin coating device according to claim 2, characterized in that: The plurality of atomizing nozzles are evenly distributed along the axial direction of the first tube.

4. The graphene slurry spin coating device according to claim 1, characterized in that: The drying assembly includes a second tube and a plurality of hot air outlets connected to the second tube.

5. The graphene slurry spin coating device according to claim 4, characterized in that: The hot air outlet is also connected with a temperature sensor.

6. The graphene slurry spin coating device according to claim 1, characterized in that: The end of the drum facing away from the motor has an annular end wall.

7. The graphene slurry spin coating device according to claim 1, characterized in that: The drum has a door cover at one end away from the motor, and the door cover is provided with a first through hole for connecting the discharging assembly with the outside world, and the door cover is also provided with a second through hole for connecting the drying assembly with the outside world.

8. The graphene slurry spin coating device according to claim 1, characterized in that: The graphene slurry spin coating device also includes a cylindrical bracket, which is coaxially arranged with the roller, and a plurality of rubber rollers are arranged between the inner wall of the bracket and the outer wall of the roller.

9. The graphene slurry spin coating device according to claim 1, characterized in that: The roller is connected to the output shaft of the motor through a coupling.

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