A method for preparing and dispersing carbon nanotubes

Abstract

The present invention discloses a method for preparing and dispersing carbon nanotubes, specifically related to the field of stirring. The carbon nanotube preparation and dispersion device includes a housing, on which a stirrer is arranged. The stirrer includes a conical container, and the carbon nanotubes are stirred and dispersed in the conical container. A dispersion cylinder is installed inside the housing, and a flexible dispersion net is fixedly arranged inside the dispersion cylinder. A sealing plate is fixedly connected to the bottom of the flexible dispersion net, and the sealing plate is vertically slidably connected to the inner side wall of the dispersion cylinder. The upper part above the flexible dispersion net is the upper cavity, and the space between the flexible dispersion net and the sealing plate is the lower cavity. Through the settings of the flexible dispersion net, the pressing rod, the driving component and the pulling-down component, during the stirring and dispersing process, the agglomerated carbon nanotubes are concentrated in the middle of the flexible dispersion net and then pressed down to be dispersed. On the one hand, the dispersion speed of the carbon nanotubes is accelerated and the dispersion effect is improved. On the other hand, the agglomerated carbon nanotubes will not remain on the flexible dispersion net, and the dispersion effect is better.

Description

Technical Field

[0001] The present invention relates to the technical field of stirring, and more specifically, to a method for preparing and dispersing carbon nanotubes. Background Art

[0002] Carbon nanotubes are highly favored due to their unique structure and excellent electrical, optical, chemical, and thermodynamic properties. Carbon nanotubes are small in size, have a very large specific surface area and aspect ratio. Coupled with the strong electrostatic and van der Waals forces between carbon nanotubes, carbon nanotubes are extremely prone to agglomeration or entanglement. The agglomeration or entanglement of carbon nanotubes causes a decrease in the electrical and mechanical properties of carbon nanotube-reinforced composites. In order to exert the excellent properties of carbon nanotubes, it is necessary to disperse them.

[0003] The dispersion methods of carbon nanotubes mainly include mechanical dispersion methods and chemical dispersion methods. Chemical dispersion methods include surface chemical covalent modification dispersion methods and non-covalent modification dispersion methods with surfactants. The mechanical dispersion method mainly uses a stirring method, that is, a dispersion liquid is added to carbon nanotubes, and the shear stress of the dispersion liquid is used to break up the carbon nanotubes.

[0004] During storage or transportation, environmental factors such as humidity and temperature will affect the surface properties of carbon nanotubes, indirectly promoting the caking phenomenon of carbon nanotubes. After caking, it is difficult for carbon nanotubes to be dispersed or the dispersion speed is slow during the stirring process, resulting in the problem that it is difficult to master the dispersion effect. Summary of the Invention

[0005] A method for preparing and dispersing carbon nanotubes provided by the present invention aims to solve the problem that it is difficult for carbon nanotubes to be dispersed or the dispersion speed is slow during the stirring process after caking, resulting in the problem that it is difficult to master the dispersion effect.

[0006] To achieve the above object, the present invention provides the following technical solution: A carbon nanotube preparation and dispersion device, including a housing, a stirrer is arranged on the housing. The stirrer includes a conical container, and the carbon nanotubes are stirred and dispersed in the conical container. A dispersion cylinder is installed inside the housing, and a flexible dispersion net is fixedly arranged inside the dispersion cylinder. The bottom of the flexible dispersion net is fixedly connected with a sealing plate, and the sealing plate is vertically slidably connected with the inner side wall of the dispersion cylinder. The space above the flexible dispersion net is the upper cavity, and the space between the flexible dispersion net and the sealing plate is the lower cavity. The dispersion device further includes a circulation component, and the circulation component circulates the carbon nanotubes among the conical container, the upper cavity, and the lower cavity. A pressure rod is arranged directly above the flexible dispersion net, and a driving component is arranged inside the housing. The driving component is used to drive the pressure rod to move vertically and rotate. A pulling-down component is arranged directly below the flexible dispersion net, and the pulling-down component is used to pull the middle part of the flexible dispersion net downward, so that the caked carbon nanotubes are concentrated towards the middle part of the flexible dispersion net, so that the pressure rod can press down the caked carbon nanotubes.

[0007] In a preferred embodiment, the flexible dispersion net includes a blind hole area and a perforated area. The blind hole area is located in the middle of the flexible dispersion net and faces the pressing rod directly. The part outside the blind hole area is the perforated area. The carbon nanotubes in the upper cavity flow downward into the lower cavity from the perforated area.

[0008] In a preferred embodiment, the driving assembly includes a driving frame. The pressing rod is installed at the bottom of the driving frame. A plug shaft is vertically and slidably inserted into the interior of the driving frame. A first rotary driving component is fixedly installed at the top inside the housing, and the output shaft of the first rotary driving component is fixedly connected to the plug shaft.

[0009] In a preferred embodiment, a linear driving component is fixedly installed inside the housing. The output end of the linear driving component is fixedly installed with a dial rod. An annular groove is provided on the driving frame, and one end of the dial rod is movably inserted into the annular groove.

[0010] In a preferred embodiment, the pulling-down assembly includes a pulling-down frame. The pulling-down frame is fixedly installed at the bottom of the blind hole area. Fixed blocks are fixedly connected to both sides of the lower part of the pulling-down frame. One side of each fixed block has an inclined surface. A third rotary driving component is arranged below the pulling-down frame. The output end of the third rotary driving component is fixedly connected to a connecting rod plate. Pulling-down rods are fixedly connected to both sides of the connecting rod plate. The upper ends of the pulling-down rods are located on one side of the inclined surface. An elastic component is pressed between the pulling-down frame and the connecting rod plate.

[0011] In a preferred embodiment, the upper end of the pulling-down rod has a sphere, and several convex blocks arranged along an arc direction are provided on the upper surface of the fixed block. The sphere contacts the convex blocks in sequence after moving along the inclined surface to the upper surface of the fixed block.

[0012] In a preferred embodiment, a vertical groove is formed in the pulling-down frame. A guide rod is movably inserted into the vertical groove, and the guide rod is fixedly connected to the sealing plate.

[0013] In a preferred embodiment, an eccentric adjustment assembly is arranged on one side of the driving assembly. The eccentric adjustment assembly includes a screw rod. The screw rod is horizontally rotatably connected to the bottom of the driving frame. The upper end of the pressing rod is in threaded transmission connection with the screw rod. A slot is formed at one end of the screw rod. A second rotary driving component is installed inside the housing, and the output end of the second rotary driving component is fixedly installed with a flat shaft, and the flat shaft is inserted into the slot.

[0014] In a preferred embodiment, the circulation assembly includes a first water pump and a second water pump. The input end of the first water pump is communicated with one side of the bottom of the conical container, the output end of the first water pump is communicated with the upper cavity, the input end of the second water pump is communicated with the lower cavity, and the output end of the second water pump is communicated with the interior of the conical container.

[0015] The present invention also provides a method for preparing and dispersing carbon nanotubes. Using the above-mentioned carbon nanotube preparation and dispersion device, it includes the following steps:

[0016] Step 1: Add carbon nanotubes and a dispersion solution into a conical container and stir.

[0017] Step 2: Pump the agglomerated carbon nanotubes gathered at the bottom of the conical container into the upper cavity through a circulation component.

[0018] Step 3: Use a dropdown component to pull down the middle part of the flexible dispersion net, so that the agglomerated carbon nanotubes concentrate towards the middle of the flexible dispersion net.

[0019] Step 4: Drive the pressure rod to move downward and rotate through a driving component, so that the pressure rod presses down the agglomerated carbon nanotubes.

[0020] Technical effects and advantages of the present invention: Through the settings of the flexible dispersion net, the pressure rod, the driving component and the dropdown component, during the stirring and dispersion process, the agglomerated carbon nanotubes are concentrated in the middle of the flexible dispersion net, and then pressed down to be dispersed. On the one hand, the dispersion speed of the carbon nanotubes is accelerated and the dispersion effect is improved. On the other hand, the agglomerated carbon nanotubes will not remain on the flexible dispersion net, and the dispersion effect is better. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a cross-sectional view of the overall structure of the present invention.

[0023] Figure 3 It is a schematic diagram of the internal structure of the present invention.

[0024] Figure 4 It is a schematic diagram of the partial structure Figure 1 。

[0025] Figure 5 It is a cross-sectional view of the partial structure of the present invention.

[0026] Figure 6 It is a schematic diagram of the partial structure Figure 2 。

[0027] Figure 7 It is a schematic diagram of the structures of the pressure rod, the driving component and the eccentric adjustment component of the present invention.

[0028] Figure 8 It is a schematic diagram of the dropdown component of the present invention.

[0029] Figure 9 It is a schematic diagram of the states of the flexible dispersion net and the pressure rod of the present invention.

[0030] Figure 10 It is a flowchart of the preparation and dispersion method of carbon nanotubes of the present invention.

[0031] The reference numerals are: 1, housing; 2, conical container; 3, dispersion cylinder; 31, upper chamber; 32, lower chamber; 4, flexible dispersion net; 41, blind hole area; 42, perforated area; 5, sealing plate; 6, pressure rod; 7, drive assembly; 71, drive frame; 711, annular groove; 72, first rotary drive member; 73, insertion shaft; 74, linear drive member; 75, lever; 8, eccentric adjustment assembly; 81, screw; 811, slot; 82, second rotary drive member; 821, flat shaft; 9, lower pull assembly; 90, vertical groove; 91, lower pull frame; 92, fixed block; 921, inclined surface; 922, convex block; 93, third rotary drive member; 94, connecting rod plate; 95, lower pull rod; 951, sphere; 96, elastic member; 97, guide rod; 100, circulation assembly; 101, first water pump; 102, second water pump. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Referring to the attached drawings of the specification Figures 1-10 A carbon nanotube preparation and dispersion device includes a housing 1, a stirrer is arranged on the housing 1, the stirrer includes a conical container 2, and the carbon nanotubes are stirred and dispersed in the conical container 2; a dispersion cylinder 3 is installed inside the housing 1, a flexible dispersion net 4 is fixedly arranged inside the dispersion cylinder 3, the bottom of the flexible dispersion net 4 is fixedly connected with a sealing plate 5, the sealing plate 5 is vertically slidably connected with the inner side wall of the dispersion cylinder 3, the upper part of the flexible dispersion net 4 is the upper chamber 31, and the space between the flexible dispersion net 4 and the sealing plate 5 is the lower chamber 32. The dispersion device further includes a circulation assembly 100, and the circulation assembly 100 circulates the carbon nanotubes among the conical container 2, the upper chamber 31 and the upper chamber 31; a pressure rod 6 is arranged directly above the flexible dispersion net 4, and a drive assembly 7 is arranged inside the housing 1, and the drive assembly 7 is used to drive the pressure rod 6 to move vertically and rotate; a lower pull assembly 9 is arranged directly below the flexible dispersion net 4, and the lower pull assembly 9 is used to pull the middle part of the flexible dispersion net 4 downward, so that the agglomerated carbon nanotubes are concentrated towards the middle part of the flexible dispersion net 4, so that the pressure rod 6 can press the agglomerated carbon nanotubes.

[0034] In the above technical solution, the stirrer is a magnetic stirrer, the flexible dispersion net 4 is made of rubber, and holes are formed thereon. The holes can be formed by inserting small sections of metal thin tubes on the flexible dispersion net 4, which can ensure that the carbon nanotubes pass through.

[0035] In this embodiment, as Figure 3 andFigure 5 As shown, the circulation component 100 includes a first water pump 101 and a second water pump 102. The input end of the first water pump 101 is communicated with one side of the bottom of the conical container 2, the output end of the first water pump 101 is communicated with the upper cavity 31, the input end of the second water pump 102 is communicated with the lower cavity 32, and the output end of the second water pump 102 is communicated with the inside of the conical container 2.

[0036] It should be noted that through the arrangement of the first water pump 101 and the second water pump 102, the first water pump 101 pumps the carbon nanotubes from the conical container 2 into the upper cavity 31, and the second water pump 102 pumps the carbon nanotubes from the lower cavity 32 into the conical container 2.

[0037] In this embodiment, as Figures 4-7 shown, the driving component 7 includes a driving frame 71. The pressing rod 6 is installed at the bottom of the driving frame 71. A plug shaft 73 is vertically and slidably inserted into the inside of the driving frame 71. A first rotary driving component 72 is fixedly installed at the top inside the housing 1. The output shaft of the first rotary driving component 72 is fixedly connected to the plug shaft 73.

[0038] Furthermore, a linear driving component 74 is fixedly installed inside the housing 1. The output end of the linear driving component 74 is fixedly installed with a dial rod 75. An annular groove 711 is provided on the driving frame 71. One end of the dial rod 75 is movably inserted into the annular groove 711.

[0039] It should be noted that the first rotary driving component 72 is a motor, the linear driving component 74 is a first electric telescopic rod. The plug shaft 73 is slidably connected to the driving frame 71 through splines. The first rotary driving component 72 can drive the driving frame 71 to rotate through the plug shaft 73, so that the driving frame 71 drives the pressing rod 6 to rotate.

[0040] In this embodiment, the pulling-down component 9 can adopt a single second electric telescopic rod. Its fixed end is installed on the housing 1, and its movable end is connected to the middle of the flexible dispersion net 4.

[0041] In this embodiment, the implementation method is as follows: First, carbon nanotubes and a dispersion solution are added into the conical container 2 and stirred to disperse the carbon nanotubes. Since the conical container 2 is conical, during the stirring process, the agglomerated carbon nanotubes will gather at the edge position of the bottom of the conical container 2. The connection between the input end of the first water pump 101 and the conical container 2 is also located at the edge position of the bottom of the conical container 2. Therefore, under the action of the first water pump 101, the agglomerated carbon nanotubes will be pumped into the upper cavity 31. The unagglomerated carbon nanotubes flow downward into the lower cavity 32 through the flexible dispersion net 4 and are then pumped back into the conical container 2 by the second water pump 102 to complete the cycle. Then, the middle part of the flexible dispersion net 4 is pulled downward by the pulling-down assembly 9. The purpose is to make the agglomerated carbon nanotubes concentrate in the middle of the flexible dispersion net 4. The pulling-down assembly 9 can be used to pull downward repeatedly to make the flexible dispersion net 4 vibrate multiple times, so that the agglomerated carbon nanotubes can quickly concentrate in the middle. Finally, the first rotation driving component 72 drives the driving frame 71 and the pressing rod 6 to rotate through the insertion shaft 73, and the linear driving component 74 drives the driving frame 71 to move downward through the lever 75, so that the bottom of the pressing rod 6 presses the position where the agglomerated carbon nanotubes in the middle of the flexible dispersion net 4 are concentrated, thereby dispersing the agglomerated carbon nanotubes. After the dispersion is completed, the linear driving component 74 drives the driving frame 71 and the pressing rod 6 to move upward, and the pulling-down assembly 9 drives the middle part of the flexible dispersion net 4 to move upward to restore its shape. During the process of stirring and dispersing the carbon nanotubes, the pressing rod 6 is repeatedly used to press the agglomerated carbon nanotubes to make the dispersion of the carbon nanotubes more thorough.

[0042] Through the settings of the flexible dispersion net 4, the pressing rod 6, the driving assembly 7 and the pulling-down assembly 9, in the process of stirring and dispersing, the agglomerated carbon nanotubes are concentrated in the middle of the flexible dispersion net 4 and then pressed to be dispersed. On the one hand, the dispersion speed of the carbon nanotubes is accelerated and the dispersion effect is improved. On the other hand, the agglomerated carbon nanotubes will not remain on the flexible dispersion net 4, and the dispersion effect is better.

[0043] In the above technical solution, as Figure 5 shown, the flexible dispersion net 4 includes a blind-hole area 41 and a perforated area 42. The blind-hole area 41 is located in the middle of the flexible dispersion net 4 and is directly opposite to the pressing rod 6. The part outside the blind-hole area 41 is the perforated area 42. The carbon nanotubes in the upper cavity 31 flow downward into the lower cavity 32 through the perforated area 42.

[0044] It should be noted that the flexible dispersion net 4 is divided into two parts: the blind-hole area 41 and the perforated area 42. When pressing the agglomerated carbon nanotubes, the agglomerated carbon nanotubes are concentrated in the area of the blind-hole area 41, and there are no holes in the area of the blind-hole area 41. Therefore, the problem that the agglomerated carbon nanotubes enter the holes and are difficult to discharge can be prevented.

[0045] Refer to the attached drawings of the specification Figures 2-8, after the agglomerated carbon nanotubes are crushed, they have strong viscosity and are likely to stick in the area of the blind hole area 41, and the dispersion speed is limited. Therefore, an eccentric adjustment component 8 is designed. Specifically, an eccentric adjustment component 8 is arranged on one side of the driving component 7. The eccentric adjustment component 8 includes a screw rod 81. The screw rod 81 is horizontally rotatably connected to the bottom of the driving frame 71. The upper end of the pressing rod 6 is in threaded transmission connection with the screw rod 81. A slot 811 is opened at one end of the screw rod 81. A rotary driving component two 82 is installed inside the housing 1. The output end of the rotary driving component two 82 is fixedly installed with a flat shaft 821. The flat shaft 821 is inserted into the slot 811.

[0046] It should be noted that the rotary driving component two 82 uses a reduction motor. As Figure 7 shown, the flat shaft 821 has a flat structure, that is, the upper and lower surfaces are flat. The flat shaft 821 is inserted into the slot 811. In this way, the rotary driving component two 82 can drive the screw rod 81 to rotate through the flat shaft 821, and the screw rod 81 drives the pressing rod 6 to reciprocate. Among them, the upper end of the pressing rod 6 is slidably connected to the driving frame 71. When the slot 811 is in a horizontal state, when the driving frame 71 rotates, the flat shaft 821 can move out of the slot 811.

[0047] Taking Figure 7 the state shown as the initial state for description. In Figure 7 , the flat shaft 821 is located inside the slot 811, and the pressing rod 6 and the insertion shaft 73 are coaxial, as shown in Figure 9 ① in. First, it is necessary to crush the agglomerated carbon nanotubes. The rotary driving component one 72 drives the driving frame 71 and the pressing rod 6 to rotate, so that the flat shaft 821 moves out of the slot 811. Then the linear driving component 74 drives the pressing rod 6 to move downward to crush the agglomerated carbon nanotubes. At this time, the crushed carbon nanotubes stick in the area of the blind hole area 41, as shown in Figure 9 ② in. Then the linear driving component 74 drives the driving frame 71 and the pressing rod 6 to move upward, and then drives the driving frame 71 to rotate through the rotary driving component one 72, so that the flat shaft 821 enters the inside of the slot 811. The rotary driving component two 82 drives the screw rod 81 to rotate, so that the pressing rod 6 moves, resulting in the non - coaxiality of the pressing rod 6 and the insertion shaft 73. Then make the flat shaft 821 move out of the slot 811 again and make the pressing rod 6 move downward to contact the flexible dispersion net 4 released by the pulling - down component 9. The rotary driving component one 72 drives the driving frame 71 to rotate, and the pressing rod 6 rotates eccentrically in contact with the flexible dispersion net 4, so that there is a smoothing action between the pressing rod 6 and the flexible dispersion net 4. In this way, the sticky carbon nanotubes can be smeared and dispersed, as shown in Figure 9 ③ in, and then flow downward into the lower cavity 32 from the area of the perforated area 42.

[0048] In the above technical solution, through the setting of the eccentric adjustment component 8, the pressure rod 6 can be adjusted between being coaxial and non - coaxial with the insertion shaft 73. When they are coaxial, the agglomerated carbon nanotubes can be pressed and dispersed downward in the area of the blind hole area 41. When they are non - coaxial, its eccentric rotation can gradually smooth the viscous carbon nanotubes on the flexible dispersion net 4, and flow out from the perforated area 42 together with the normal carbon nanotubes, improving the dispersion speed by avoiding viscosity.

[0049] Refer to the attached drawings of the specification Figure 2 , Figure 5 , Figure 6 Figure 8 Here, another specific structural form of the dropdown component 9 is provided. Specifically, the dropdown component 9 includes a dropdown frame 91, the dropdown frame 91 is fixedly installed at the bottom of the blind hole area 41. On both sides of the lower part of the dropdown frame 91, fixing blocks 92 are fixedly connected. One side of the fixing block 92 has an inclined surface 921. A rotary drive component three 93 is arranged below the dropdown frame 91. The output end of the rotary drive component three 93 is fixedly connected with a connecting rod plate 94. On both sides of the connecting rod plate 94, dropdown rods 95 are fixedly connected. The upper ends of the dropdown rods 95 are located on one side of the inclined surface 921. An elastic component 96 is pressed between the dropdown frame 91 and the connecting rod plate 94.

[0050] Further, the upper end of the dropdown rod 95 has a sphere 951, and the upper surface of the fixing block 92 has several convex blocks 922 arranged along the arc direction. The sphere 951 contacts the convex blocks 922 in sequence after moving along the inclined surface 921 to the upper surface of the fixing block 92.

[0051] Still further, a vertical groove 90 is opened on the dropdown frame 91, and a guide rod 97 is movably inserted into the interior of the vertical groove 90. The guide rod 97 is fixedly connected with the sealing plate 5.

[0052] When the flexible dispersion net 4 is not pulled down, the sphere 951 is located at the position shown in Figure 8 , that is, the lower side of the inclined surface 921. When it is necessary to pull down the blind hole area 41, the rotary drive component three 93 drives the connecting rod plate 94 and the dropdown rods 95 to rotate. The sphere 951 slides upward along the inclined surface 921. During this process, the dropdown frame 91 is pulled downward, and the elastic component 96 is compressed. In this way, the purpose of pulling down the blind hole area 41 is achieved. When the sphere 951 moves to the upper surface of the fixing block 92, it contacts the convex blocks 922. During this process, the fixing block 92 vibrates continuously, thereby driving the flexible dispersion net 4 to vibrate, and shaking the agglomerated carbon nanotubes to the position of the blind hole area 41. When it is necessary to release the blind hole area 41, the rotary drive component three 93 drives the sphere 951 to reverse to the position shown in Figure 8 . Among them, the rotary drive component three 93 is a motor, the elastic component 96 is a compression spring, and the purpose of setting the guide rod 97 is to prevent the dropdown frame 91 from rotating.

[0053] Refer to the attached description Figure 10 This embodiment also provides a method for preparing and dispersing carbon nanotubes. Using the above-mentioned carbon nanotube preparation and dispersion device, it includes the following steps:

[0054] Step 1: Add carbon nanotubes and a dispersion solution into the conical container 2 and stir them;

[0055] Step 2: Through the circulation component 100, suck the agglomerated carbon nanotubes gathered at the bottom of the conical container 2 into the upper cavity 31;

[0056] Step 3: Use the dropdown component 9 to pull down the middle part of the flexible dispersion net 4, so that the agglomerated carbon nanotubes are concentrated towards the middle part of the flexible dispersion net 4;

[0057] Step 4: Drive the pressure rod 6 to move downward and rotate through the driving component 7, so that the pressure rod 6 presses down the agglomerated carbon nanotubes.

[0058] Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A carbon nanotube preparation and dispersion device, characterized in that: It comprises a shell (1), the shell (1) is provided with a stirrer, the stirrer comprises a conical container (2), and the carbon nanotubes are stirred and dispersed in the conical container (2); A dispersion cylinder (3) is installed inside the shell (1), a flexible dispersion net (4) is fixedly arranged inside the dispersion cylinder (3), a sealing plate (5) is fixedly connected to the bottom of the flexible dispersion net (4), the sealing plate (5) is vertically slidably connected to the inner wall of the dispersion cylinder (3), the upper part of the flexible dispersion net (4) is an upper chamber (31), and the space between the flexible dispersion net (4) and the sealing plate (5) is a lower chamber (32), and the dispersion device further comprises a circulation component (100), and the circulation component (100) circulates the carbon nanotubes between the conical container (2), the upper chamber (31), and the lower chamber (31); A pressure rod (6) is arranged directly above the flexible dispersion net (4), and a driving assembly (7) is arranged inside the shell (1), wherein the driving assembly (7) is used to drive the pressure rod (6) to move vertically and rotate; A pull-down component (9) is arranged directly below the flexible dispersion net (4), and the pull-down component (9) is used to pull the middle part of the flexible dispersion net (4) downward, so that the agglomerated carbon nanotubes are concentrated in the middle part of the flexible dispersion net (4), so that the pressure rod (6) can press down the agglomerated carbon nanotubes; The flexible dispersion net (4) comprises a blind hole area (41) and a porous area (42), wherein the blind hole area (41) is located in the middle of the flexible dispersion net (4) and directly faces the pressure rod (6), and the portion outside the blind hole area (41) is the porous area (42), and the carbon nanotubes in the upper cavity (31) flow from the porous area (42) into the lower cavity (32).

2. A carbon nanotube preparation and dispersion device according to claim 1, characterized in that: The driving assembly (7) comprises a driving frame (71), the pressure rod (6) is mounted at the bottom of the driving frame (71), an insertion shaft (73) is vertically slidably inserted inside the driving frame (71), a rotating driving component (72) is fixedly mounted on the top of the inner side of the shell (1), and an output shaft of the rotating driving component (72) is fixedly connected to the insertion shaft (73).

3. A carbon nanotube preparation and dispersion device according to claim 2, characterized in that: A linear drive component (74) is fixedly mounted inside the housing (1); a lever (75) is fixedly mounted on the output end of the linear drive component (74); an annular groove (711) is provided on the drive frame (71); one end of the lever (75) is movably inserted into the annular groove (711).

4. The carbon nanotube preparation and dispersion device according to claim 1, characterized in that: The pull-down assembly (9) comprises a pull-down frame (91), the pull-down frame (91) is fixedly mounted at the bottom of the blind hole area (41), both sides of the lower part of the pull-down frame (91) are fixedly connected with fixed blocks (92), one side of the fixed block (92) has an inclined surface (921), a rotation drive component three (93) is arranged below the pull-down frame (91), the output end of the rotation drive component three (93) is fixedly connected with a connecting rod plate (94), both sides of the connecting rod plate (94) are fixedly connected with a pull-down rod (95), the upper end of the pull-down rod (95) is located on one side of the inclined surface (921), and an elastic component (96) is pressed between the pull-down frame (91) and the connecting rod plate (94).

5. The carbon nanotube preparation and dispersion device according to claim 4, characterized in that: The upper end of the lower pull rod (95) has a sphere (951), and the upper surface of the fixed block (92) has a plurality of protrusions (922) arranged along an arc direction. The sphere (951) moves along the inclined surface (921) to the upper surface of the fixed block (92) and contacts the protrusions (922) in sequence.

6. The carbon nanotube preparation and dispersion device according to claim 4, characterized in that: The pull-down frame (91) is provided with a vertical slot (90), a guide rod (97) is movably inserted into the interior of the vertical slot (90), and the guide rod (97) is fixedly connected to the sealing plate (5).

7. The carbon nanotube preparation and dispersion device according to claim 3, characterized in that: An eccentric adjustment component (8) is provided on one side of the driving component (7), and the eccentric adjustment component (8) comprises a screw rod (81), and the screw rod (81) is connected to the bottom of the driving frame (71) in a transverse rotation manner. The upper end of the pressure rod (6) is connected to the screw rod (81) by threaded transmission, and a slot (811) is provided at one end of the screw rod (81). A second rotating driving component (82) is installed inside the housing (1), and a flat shaft (821) is fixedly installed at the output end of the second rotating driving component (82), and the flat shaft (821) is inserted into the slot (811).

8. The carbon nanotube preparation and dispersion device according to claim 1, characterized in that: The circulation component (100) comprises a water pump 1 (101) and a water pump 2 (102); the input end of the water pump 1 (101) is connected to one side of the bottom of the conical container (2); the output end of the water pump 1 (101) is connected to the upper chamber (31); the input end of the water pump 2 (102) is connected to the lower chamber (32); and the output end of the water pump 2 (102) is connected to the interior of the conical container (2).

9. A method for dispersing carbon nanotubes, using the carbon nanotube preparation and dispersion device according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Add carbon nanotubes and a dispersed solution into a conical container (2) and stir; Step 2: The agglomerated carbon nanotubes gathered at the bottom of the conical container (2) are pumped into the upper chamber (31) through the circulation component (100); Step 3: Use a pull-down assembly (9) to pull the middle of the flexible dispersion net (4) downward, so that the agglomerated carbon nanotubes are concentrated in the middle of the flexible dispersion net (4); Step 4: The driving assembly (7) drives the pressing rod (6) to move downward and rotate, so that the pressing rod (6) presses down the agglomerated carbon nanotubes.

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