A method for preparing and dispersing carbon nanotubes

Abstract

The present invention discloses a method for preparing and dispersing carbon nanotubes, and specifically relates to the field of stirring. The carbon nanotube preparation and dispersion device comprises a shell, and a stirrer is arranged on the shell. The stirrer comprises a conical container, and the carbon nanotubes are stirred and dispersed in the conical container; a dispersion cylinder is installed inside the shell, 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 of the flexible dispersion net is an upper cavity, and the space between the flexible dispersion net and the sealing plate is a lower cavity. The present invention, through the arrangement of a flexible dispersion net, a pressure rod, a driving component and a pull-down component, concentrates the agglomerated carbon nanotubes to the middle part of the flexible dispersion net during the stirring and dispersing process, and then presses down to disperse them. 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 invention relates to the field of stirring technology, 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, with a very large specific surface area and aspect ratio. In addition, there are strong electrostatic interactions and van der Waals forces between carbon nanotubes, which makes them very easy to agglomerate or entangle. The agglomeration or entanglement of carbon nanotubes causes the electrical and mechanical properties of carbon nanotube-reinforced composite materials to decrease. In order to give full play to the excellent properties of carbon nanotubes, they need to be dispersed.

[0003] There are two main methods for dispersing carbon nanotubes: mechanical dispersion and chemical dispersion. The chemical dispersion method includes surface chemical covalent modification dispersion and surfactant non-covalent modification dispersion. The mechanical dispersion method mainly uses a stirring method, that is, adding a dispersion liquid to the carbon nanotubes and using the shear stress of the dispersion liquid 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 agglomeration of carbon nanotubes. After agglomeration, carbon nanotubes are difficult to disperse or disperse slowly during stirring, making it difficult to control the dispersion effect. Summary of the invention

[0005] The present invention provides a method for preparing and dispersing carbon nanotubes, and aims to solve the problem that agglomerated carbon nanotubes are difficult to disperse or disperse slowly during stirring, resulting in a problem that the dispersion effect is difficult to control.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a carbon nanotube preparation and dispersion device, comprising a shell, on which an agitator is arranged, the agitator comprises a conical container, and the carbon nanotubes are stirred and dispersed in the conical container; a dispersion cylinder is installed inside the shell, and a flexible dispersion net is fixedly arranged inside the dispersion cylinder, and 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 wall of the dispersion cylinder, the upper part of the flexible dispersion net is an upper cavity, and the space between the flexible dispersion net and the sealing plate is a lower cavity, and the dispersion device also includes a circulation component, and the circulation component circulates the carbon nanotubes between the conical container, the upper cavity and the upper cavity; a pressure rod is arranged directly above the flexible dispersion net, and a driving component is arranged inside the shell, and the driving component is used to drive the pressure rod to move vertically and rotate; a pull-down component is arranged directly below the flexible dispersion net, and the pull-down component is used to pull the middle part of the flexible dispersion net downward, so that the agglomerated carbon nanotubes are concentrated to the middle part of the flexible dispersion net, so that the pressure rod can press down the agglomerated carbon nanotubes.

[0007] In a preferred embodiment, the flexible dispersion net includes a blind hole area and a porous area. The blind hole area is located in the middle of the flexible dispersion net and is directly opposite to the pressure rod. The part outside the blind hole area is a porous area. The carbon nanotubes in the upper cavity flow from the porous area to the lower cavity.

[0008] In a preferred embodiment, the drive assembly includes a drive frame, a pressure rod is installed at the bottom of the drive frame, an insertion shaft is vertically slidably inserted inside the drive frame, a rotating drive component 1 is fixedly installed at the top of the inner side of the shell, and the output shaft of the rotating drive component 1 is fixedly connected to the insertion shaft.

[0009] In a preferred embodiment, a linear drive component is fixedly installed inside the shell, a lever is fixedly installed at the output end of the linear drive component, an annular groove is provided on the drive frame, and one end of the lever is movably inserted into the annular groove.

[0010] In a preferred embodiment, the pull-down assembly includes a pull-down frame, which is fixedly installed at the bottom of the blind hole area, and both sides of the lower part of the pull-down frame are fixedly connected with fixed blocks, one side of the fixed block has an inclined surface, and a rotation drive component three is arranged below the pull-down frame, and the output end of the rotation drive component three is fixedly connected with a connecting rod plate, and both sides of the connecting rod plate are fixedly connected with a pull-down rod, and the upper end of the pull-down rod is located on one side of the inclined surface, and an elastic component is pressed between the pull-down frame and the connecting rod plate.

[0011] In a preferred embodiment, the upper end of the lower pull rod has a sphere, the upper surface of the fixed block has a plurality of protrusions arranged along an arc direction, and the sphere moves along the inclined surface to the upper surface of the fixed block and contacts the protrusions in sequence.

[0012] In a preferred embodiment, a vertical slot is provided on the pull-down frame, a guide rod is movably inserted into the interior of the vertical slot, and the guide rod is fixedly connected to the sealing plate.

[0013] In a preferred embodiment, an eccentric adjustment assembly is provided on one side of the driving assembly, and the eccentric adjustment assembly includes a screw rod, which is laterally rotatably connected to the bottom of the driving frame, the upper end of the pressure rod is threadedly connected to the screw rod, a slot is provided at one end of the screw rod, and a rotating driving component 2 is installed inside the shell, and a flat shaft is fixedly installed at the output end of the rotating driving component 2, and the flat shaft is inserted into the slot.

[0014] In a preferred embodiment, the circulation component includes water pump 1 and water pump 2, the input end of water pump 1 is connected to one side of the bottom of the conical container, the output end of water pump 1 is connected to the upper chamber, the input end of water pump 2 is connected to the lower chamber, and the output end of water pump 2 is connected to 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 dispersing device, comprising the following steps: Step 1: Add carbon nanotubes and dispersed solution into a conical container and stir; Step 2: pumping the agglomerated carbon nanotubes gathered at the bottom of the conical container into the upper chamber through a circulation component; Step 3: Use a pull-down assembly to pull the middle of the flexible dispersion net downward, so that the agglomerated carbon nanotubes are concentrated in the middle of the flexible dispersion net; Step 4: The driving assembly drives the pressure rod to move downward and rotate, so that the pressure rod presses down the agglomerated carbon nanotubes.

[0016] The technical effects and advantages of the present invention are as follows: the present invention, through the setting of a flexible dispersion net, a pressure rod, a driving assembly and a pull-down assembly, concentrates the agglomerated carbon nanotubes in the middle of the flexible dispersion net during the stirring and dispersing process, and then presses down to disperse them. 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a cross-sectional view of the overall structure of the present invention.

[0019] Figure 3 It is a schematic diagram of the internal structure of the present invention.

[0020] Figure 4 It is a schematic diagram of the local structure of the present invention Figure 1 .

[0021] Figure 5 It is a cross-sectional view of a local structure of the present invention.

[0022] Figure 6 It is a schematic diagram of the local structure of the present invention Figure 2 .

[0023] Figure 7 It is a schematic structural diagram of the pressure rod, the driving assembly and the eccentric adjustment assembly of the present invention.

[0024] Figure 8 It is a schematic structural diagram of the pull-down assembly of the present invention.

[0025] Fig. 9 It is a schematic diagram of the state of the flexible dispersion net and the pressure rod of the present invention.

[0026] Fig.10 This is a flow chart of the method for preparing and dispersing carbon nanotubes of the present invention.

[0027] The accompanying drawings are marked as follows: 1. shell; 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. rotary drive component one; 73. plug shaft; 74. linear drive component; 75. lever; 8. eccentric adjustment assembly; 81. screw; 811. slot; 82. rotary drive component two; 821. flat shaft; 9. pull-down assembly; 90. vertical groove; 91. pull-down frame; 92. fixing block; 921. inclined surface; 922. protrusion; 93. rotary drive component three; 94. connecting rod plate; 95. pull-down rod; 951. sphere; 96. elastic component; 97. guide rod; 100. circulation assembly; 101. water pump one; 102. water pump two. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Refer to the instruction manual Figure 1-Figure 10 A carbon nanotube preparation and dispersion device comprises a shell 1, on which a stirrer is arranged, the stirrer comprises a conical container 2, in which the carbon nanotubes are stirred and dispersed; 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 side wall of the dispersion cylinder 3, the upper part of the flexible dispersion net 4 is an upper cavity 31, and the space between the flexible dispersion net 4 and the sealing plate 5 is a lower cavity 32. The dispersion device also comprises a circulating The ring assembly 100, the circulation assembly 100 circulates the carbon nanotubes between 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 driving assembly 7 is arranged inside the shell 1, and the driving assembly 7 is used to drive the pressure rod 6 to move vertically and rotate; a pull-down assembly 9 is arranged directly below the flexible dispersion net 4, and the pull-down assembly 9 is used to pull the middle part of the flexible dispersion net 4 downward, so that the agglomerated carbon nanotubes are concentrated to the middle part of the flexible dispersion net 4, so that the pressure rod 6 can press down the agglomerated carbon nanotubes.

[0030] In the above technical solution, the stirrer is a magnetic stirrer, and the flexible dispersion net 4 is made of rubber with holes formed thereon. The holes can be formed by inserting small sections of metal tubes into the flexible dispersion net 4 to ensure that the carbon nanotubes can pass through.

[0031] In this embodiment, if Figure 3 and Figure 5 As shown, the circulation component 100 includes a water pump 101 and a water pump 102. The input end of the water pump 101 is connected to one side of the bottom of the conical container 2, the output end of the water pump 101 is connected to the upper chamber 31, the input end of the water pump 102 is connected to the lower chamber 32, and the output end of the water pump 102 is connected to the interior of the conical container 2.

[0032] It should be noted that, through the setting of water pump 1 101 and water pump 2 102 , water pump 1 101 pumps the carbon nanotubes from the conical container 2 into the upper chamber 31 , and water pump 2 102 pumps the carbon nanotubes from the lower chamber 32 into the conical container 2 .

[0033] In this embodiment, if Figure 4-Figure 7 As shown, the driving assembly 7 includes a driving frame 71, a pressure rod 6 is installed 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 installed on the top of the inner side of the shell 1, and the output shaft of the rotating driving component 72 is fixedly connected to the insertion shaft 73.

[0034] Furthermore, a linear drive component 74 is fixedly installed inside the housing 1 , a lever 75 is fixedly installed at the output end of the linear drive component 74 , an annular groove 711 is provided on the drive frame 71 , and one end of the lever 75 is movably inserted into the annular groove 711 .

[0035] It should be noted that the rotating drive component 72 is a motor, the linear drive component 74 is an electric telescopic rod, the plug shaft 73 and the drive frame 71 are connected by a spline sliding connection, and the rotating drive component 72 can drive the drive frame 71 to rotate through the plug shaft 73, thereby causing the drive frame 71 to drive the pressure rod 6 to rotate.

[0036] In this embodiment, the pull-down assembly 9 can adopt a single electric telescopic rod 2, a fixed end of which is mounted on the housing 1 and a movable end of which is connected to the middle of the flexible dispersion net 4.

[0037] In this embodiment, the implementation method is as follows: first, carbon nanotubes and 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 of the bottom of the conical container 2. The connection between the input end of the water pump 101 and the conical container 2 is also located at the edge of the bottom of the conical container 2. Therefore, under the action of the water pump 101, the agglomerated carbon nanotubes will be drawn into the interior of the upper chamber 31, and the unagglomerated carbon nanotubes will flow from the flexible dispersion net 4 into the lower chamber 32, and then be drawn back to the conical container 2 through the water pump 2 102 to complete the cycle. Then, the middle part of the flexible dispersion net 4 is pulled down by the pull-down component 9, the purpose of which is to concentrate the agglomerated carbon nanotubes in the middle part of the flexible dispersion net 4. The pull-down component 9 can be used to pull down repeatedly to make the flexible dispersion net 4 vibrate repeatedly, so that the agglomerated carbon nanotubes are quickly concentrated in the middle part. Finally, the rotary drive component 1 72 drives the drive frame 71 and the pressure rod 6 to rotate through the plug shaft 73, and the linear drive component 74 drives the drive frame 71 to move downward through the lever 75, so that the bottom of the pressure rod 6 presses down the location where the carbon nanotubes agglomerated in the middle of the flexible dispersion net 4 are concentrated, thereby crushing the agglomerated carbon nanotubes. After the crushing is completed, the linear drive component 74 drives the drive frame 71 and the pressure rod 6 to move upward, and the pull-down component 9 drives the middle of the flexible dispersion net 4 to move upward to restore the shape. In the process of stirring and dispersing the carbon nanotubes, the pressure rod 6 is repeatedly pressed down on the agglomerated carbon nanotubes for multiple times, so that the carbon nanotubes are dispersed more thoroughly.

[0038] The above technical solution, through the setting of the flexible dispersing net 4, the pressure rod 6, the driving component 7 and the pull-down component 9, concentrates the agglomerated carbon nanotubes to the middle part of the flexible dispersing net 4 during the stirring and dispersing process, and then presses down to disperse them. 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 dispersing net 4, and the dispersion effect is better.

[0039] In the above technical solution, if Figure 5 As shown, the flexible dispersion net 4 includes a blind hole area 41 and a porous area 42. The blind hole area 41 is located in the middle of the flexible dispersion net 4 and is directly opposite to the pressure rod 6. The part outside the blind hole area 41 is the porous area 42. The carbon nanotubes in the upper cavity 31 flow from the porous area 42 to the lower cavity 32.

[0040] It should be noted that the flexible dispersion net 4 is divided into two parts, a blind hole area 41 and a porous area 42. When the agglomerated carbon nanotubes are pressed down, the agglomerated carbon nanotubes are concentrated in the area of ​​the blind hole area 41, and the area of ​​the blind hole area 41 has no holes. Therefore, the problem of the agglomerated carbon nanotubes entering the holes and being difficult to discharge can be prevented.

[0041] Refer to the instruction manual Figure 2-Figure 8After the agglomerated carbon nanotubes are compressed and dispersed, they have strong viscosity and are easy to stick to 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 provided on one side of the driving component 7, and the eccentric adjustment component 8 includes a screw 81, and the screw 81 is connected to the bottom of the driving frame 71 by transverse rotation. The upper end of the pressure rod 6 is threadedly connected to the screw 81, and a slot 811 is provided at one end of the screw 81. A rotating driving component 82 is installed inside the housing 1, and a flat shaft 821 is fixedly installed at the output end of the rotating driving component 82, and the flat shaft 821 is inserted into the slot 811.

[0042] It should be noted that the second rotary drive component 82 adopts a reduction motor, such as Figure 7 As shown, the flat shaft 821 is a flat structure, that is, the upper and lower surfaces are planes, and the flat shaft 821 is inserted into the slot 811. In this way, the rotating drive component 82 can drive the screw 81 to rotate through the flat shaft 821, and the screw 81 drives the pressure rod 6 to move back and forth, wherein the upper end of the pressure rod 6 is slidably connected to the drive frame 71. When the slot 811 is in a horizontal state, when the drive frame 71 rotates, the flat shaft 821 can be moved out of the slot 811.

[0043] by Figure 7 The status shown is the initial status for illustration. Figure 7 In the embodiment, the flat shaft 821 is located inside the slot 811, and the pressure rod 6 is coaxial with the insertion shaft 73. Fig. 9 First, the agglomerated carbon nanotubes need to be crushed and dispersed. The rotary drive component 72 drives the drive frame 71 and the pressure rod 6 to rotate, so that the flat shaft 821 moves out of the slot 811. Then, the linear drive component 74 drives the pressure rod 6 to move downward to crush the agglomerated carbon nanotubes. At this time, the crushed carbon nanotubes are stuck in the blind hole area 41, as shown in FIG. Fig. 9 As shown in ② in the figure. Then the linear drive component 74 drives the drive frame 71 and the pressure rod 6 to move upward, and then drives the drive frame 71 to rotate through the rotary drive component 1 72, so that the flat shaft 821 enters the interior of the slot 811, and drives the screw 81 to rotate through the rotary drive component 2 82, so that the pressure rod 6 moves, so that the pressure rod 6 and the insertion shaft 73 are not coaxial. The flat shaft 821 is moved out of the slot 811 again, and the pressure rod 6 is moved downward to contact the flexible dispersion net 4 released by the pull-down component 9. The rotary drive component 1 72 drives the drive frame 71 to rotate, and the pressure rod 6 contacts the flexible dispersion net 4 and rotates eccentrically, so that there is a smoothing action between the pressure rod 6 and the flexible dispersion net 4. In this way, the sticky carbon nanotubes can be spread out, as shown in FIG. Fig. 9 As shown in ③ in the figure, it then flows from the area with holes 42 to the lower chamber 32.

[0044] In the above technical solution, by setting the eccentric adjustment component 8, the pressure rod 6 can be adjusted between being coaxial and non-coaxial with the insertion shaft 73. When it is coaxial, the agglomerated carbon nanotubes can be pressed downward in the blind hole area 41. When it is non-coaxial, its eccentric rotation can gradually smooth the sticky carbon nanotubes on the flexible dispersion net 4, and flow out from the porous area 42 together with the normal carbon nanotubes, thereby improving the dispersion speed by avoiding stickiness.

[0045] Refer to the instruction manual Figure 2 , Figure 5 , Figure 6 Figure 8 Herein, another specific structural form of the pull-down assembly 9 is provided. Specifically, the pull-down assembly 9 includes a pull-down frame 91, which is fixedly installed 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, and a rotating drive component 3 93 is arranged below the pull-down frame 91. The output end of the rotating drive component 3 93 is fixedly connected with a connecting rod plate 94, and both sides of the connecting rod plate 94 are fixedly connected with a pull-down rod 95, and 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.

[0046] Furthermore, 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.

[0047] Furthermore, a vertical slot 90 is formed on the lower pull-down frame 91 , and a guide rod 97 is movably inserted into the vertical slot 90 , and the guide rod 97 is fixedly connected to the sealing plate 5 .

[0048] When the flexible dispersion net 4 is not pulled down, the sphere 951 is located Figure 8 At the position shown, that is, the lower side of the inclined surface 921, when the blind hole area 41 needs to be pulled down, the rotating driving component 3 93 drives the connecting rod plate 94 and the lower pull rod 95 to rotate, and the ball 951 slides upward along the inclined surface 921. During this process, the lower pull 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 ball 951 moves to the upper surface of the fixed block 92, it contacts the protrusion 922. During this process, the fixed block 92 continuously vibrates, thereby driving the flexible dispersion network 4 to vibrate, and shaking the agglomerated carbon nanotubes to the position of the blind hole area 41. When the blind hole area 41 is to be released, the rotating driving component 3 93 drives the ball 951 to reverse to Figure 8 Wherein, the rotation drive component three 93 is a motor, the elastic component 96 is a compression spring, and the setting purpose of the guide rod 97 is to prevent the pull-down frame 91 from rotating.

[0049] Refer to the instruction manual Fig.10 This embodiment also provides a method for preparing and dispersing carbon nanotubes, using the above-mentioned carbon nanotube preparation and dispersion device, comprising the following steps: Step 1: Add carbon nanotubes and 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 the 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.

[0050] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should 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.

2. A carbon nanotube preparation and dispersion device according to claim 1, characterized in that: 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).

3. The 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).

4. A carbon nanotube preparation and dispersion device according to claim 3, 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).

5. The carbon nanotube preparation and dispersion device according to claim 2, 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).

6. The carbon nanotube preparation and dispersion device according to claim 5, 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.

7. The carbon nanotube preparation and dispersion device according to claim 5, 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).

8. The carbon nanotube preparation and dispersion device according to claim 4, 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).

9. 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).

10. A method for preparing and dispersing carbon nanotubes, using the carbon nanotube preparation and dispersing device according to any one of claims 1 to 9, 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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