Preparation method of carbon nanotube-containing film periodic structure metamaterial

Abstract

The application belongs to the technical field of carbon nanotubes, and particularly relates to a preparation method of a carbon nanotube film containing periodic structure metamaterials, which comprises the following steps: firstly, a carbon nanotube film with periodic structure is prepared; an adhesion agent is uniformly applied on the surface of a wave-absorbing coating by using a workbench, and a thin and uniform coating is formed; the prepared carbon nanotube film is placed on the surface of the wave-absorbing coating coated with the adhesion agent to obtain a composite material; the composite material is dried and solidified by using the workbench to obtain a wave-absorbing metamaterial containing the carbon nanotube film with periodic structure; the preparation of the carbon nanotube film into a periodic structure can provide a series of favorable characteristics for the wave-absorbing material, including light weight, wide-spectrum wave absorption, controllability, high-temperature stability, corrosion resistance and electromagnetic transparency, etc., which makes them have wide application potential in various electromagnetic wave control and wave-absorbing applications.

Description

Technical Field

[0001] This invention belongs to the field of carbon nanotube technology, specifically a method for preparing periodic metamaterials containing carbon nanotube thin films. Background Technology

[0002] With the development of science and technology, the impact of electromagnetic radiation on the environment is increasing. Electromagnetic waves can interfere with the normal operation of precision equipment such as aerospace, medical diagnostic machines, and mobile phones. Electromagnetic absorbing materials are a type of material that can absorb or significantly reduce the electromagnetic wave energy received on their surface, thereby reducing electromagnetic interference.

[0003] Aluminum, as an excellent thermally conductive material, possesses high thermal and electrical conductivity and is widely used in electronic heat dissipation. Current technologies primarily involve fabricating aluminum into periodic structures and then attaching them to magnetic absorbing coatings. However, firstly, the large number of free electrons in the metal resonates with electromagnetic waves, limiting the absorption band to a specific frequency range. This results in a narrow absorption band for the periodic aluminum structure, making it difficult to broaden. Secondly, while some dielectric materials exhibit good absorption performance within a specific frequency range, this is usually very limited, as the dielectric constant can vary significantly across frequencies. Therefore, choosing a single dielectric layer may restrict the width of the absorption band. Creating composite absorbing materials requires more steps and more advanced fabrication techniques, leading to increased costs.

[0004] Researchers in this field have found that by using different conductive materials, different preparation methods, different dielectric materials, and different layer structures, it is possible to design absorbing materials that meet single-frequency, multi-frequency, and even broadband absorption performance. Examples include resistive model metamaterials, tunable metamaterials, multilayer metamaterials, and flexible metamaterials. However, so far, the preparation of these metamaterials cannot simultaneously possess the characteristics of low preparation cost, simple process, and superior performance. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes a method for preparing periodic metamaterials containing carbon nanotube thin films.

[0006] The technical solution adopted by this invention to solve its technical problem is: a method for preparing a periodic metamaterial containing carbon nanotube thin films, comprising the following steps:

[0007] S1: First, prepare carbon nanotube films with periodic structures;

[0008] S2: Use the worktable to evenly apply the adhesive to the surface of the microwave absorbing coating to form a thin and uniform coating;

[0009] S3: Place the prepared carbon nanotube film on the surface of the microwave absorbing coating coated with an adhesive to obtain a composite material;

[0010] S4: drying and curing the composite material by the workbench to obtain the wave-absorbing metamaterial with the periodic structure of the carbon nanotube film.

[0011] Preferably, the carbon nanotube film with the periodic structure in S1 is prepared by using a porous template.

[0012] Preferably, the carbon nanotube film with the periodic structure in S1 is prepared by using a chemical vapor deposition method.

[0013] Preferably, the workbench is rotationally connected with a rotating disc at the middle part; the rotating disc is placed with a wave-absorbing coating; the upper surface of the workbench is slidably connected with symmetrically arranged slide rods at four sides; the upper end of the slide rod is fixedly connected with a fixed block; the fixed block is slidably connected with a pressing rod; the inner side end of the pressing rod is fixedly connected with a pressing block below; the pressing rod is provided with an adjusting assembly above; the adjusting assembly is used for adjusting the position of the end of the pressing rod; the bottom of the slide rod is fixedly connected with a pressure receiving plate; the bottom center of the workbench is provided with a telescopic air cylinder; the output end of the telescopic air cylinder is fixedly connected with a connecting rod corresponding to the pressure receiving plate; the connecting rod is fixedly connected with a fixed ring corresponding to the position of the pressure receiving plate, and the fixed ring is slidably connected on the pressure receiving plate; the slide rod is sleeved with a spring corresponding to the position between the upper surface of the workbench and the fixed block; the lower surface of the workbench is fixedly connected with a supporting leg at four corners.

[0014] Preferably, the adjusting assembly comprises a first sliding groove penetrating through the side wall of the pressing rod; the second sliding groove larger than the first sliding groove is formed on the pressing rod corresponding to the position of the first sliding groove; the fixed block is provided with a threaded hole on the side close to the second sliding groove; the threaded hole is provided with a jackscrew; the fixed block is fixedly connected with a hinged rod at the end away from the jackscrew, and the hinged rod is located in the first sliding groove.

[0015] Preferably, the upper surface of the pressing rod is a convex arc; the end of the pressing rod away from the pressing block is provided with a groove; the groove is provided with a counterweight.

[0016] Preferably, the rotating disc is provided with a heating sheet inside; the side wall of the rotating disc is fixedly connected with a positive and negative copper ring electrically connected with the heating sheet; the workbench is fixedly connected with a power distribution ring corresponding to the copper ring, and the surface of the copper ring and the corresponding power distribution ring are attached to each other.

[0017] Preferably, the upper surface of the workbench is provided with an annular groove corresponding to the position of the spring, and the lower end of the spring is located at the bottom of the annular groove.

[0018] The beneficial effects of the present application are:

[0019] 1.The present application provides a kind of carbon nanotube film containing periodic structure metamaterial preparation method, first in the preparation of carbon nanotube film with periodic structure is divided into two methods, first can utilize the template with micro or nanometer scale gap, carbon nanotube solution is dropped on it, then through pyrolysis method control carbon nanotube arrangement, to achieve the purpose of preparation of carbon nanotube film with periodic structure;Second can be prepared by CVD method and chemical vapor deposition method, by controlling the catalyst on the surface of base and growth conditions control carbon nanotube directional growth direction, to achieve the preparation of carbon nanotube film with periodic structure, then the wave-absorbing coating is placed on the turntable, after determining the position, through the cooperation of telescopic motor, connecting rod, pressure plate and fixing ring, each slide rod is synchronously moved downward, then the pressure bar and the pressure block on the pressure bar are positioned on the wave-absorbing coating, then the adhesion agent is evenly coated on the surface of the wave-absorbing coating by rotating the turntable manually, and a thin and uniform coating is formed, at this time, the prepared carbon nanotube film with periodic structure is placed above the wave-absorbing coating, the wave-absorbing coating is connected with the surface of the carbon nanotube film by using the adhesion agent, then the formed composite material is dried by heating, so that it is solidified and becomes an integral whole, and the wave-absorbing metamaterial containing carbon nanotube film with periodic structure is prepared. Since carbon nanotubes are lightweight and high-strength materials, they have lower density and higher strength than traditional metal periodic structures, which makes the carbon nanotube film in the periodic structure very advantageous in applications requiring low weight and high strength.

[0020] 2.The present application provides a kind of carbon nanotube film containing periodic structure metamaterial preparation method, by manually sliding the pressure bar on the fixed block to adjust the position of the pressure block, then by rotating the butterfly-shaped jackscrew, the jackscrew is tightened on the pressure bar to fix the position of the pressure bar, so as to adjust the position between each pressure block, and to fix the wave-absorbing coating of different sizes, and the adhesion agent can be evenly coated on the wave-absorbing coating; At the same time, in order to facilitate subsequent heating and drying, and to solidify it into an integral whole, the jackscrew can be loosened during actual use, the pressure bar is rotated around the hinge rod, the upper surface of the pressure bar is pressed on the prepared composite material, so that it is fixed, and the composite material is attached to the surface of the turntable, to avoid external interference. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute undue limitations on the present application. In the drawings:

[0022] Figure 1 is a flow chart of the present application;

[0023] Figure 2 is a bottom perspective view of the present application;

[0024] Figure 3 This is a cross-sectional view of the present invention;

[0025] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 This is a top perspective view of the present invention;

[0027] Figure 6 This is a perspective view of the fixing block structure of the present invention;

[0028] Figure 7 This is a perspective view of the pressure plate structure of the present invention;

[0029] Legend:

[0030] 1. Workbench; 2. Turntable; 21. Copper ring; 22. Distribution ring; 3. Wave-absorbing coating; 4. Slide rod; 5. Fixing block; 6. Pressure rod; 61. First slide groove; 62. Second slide groove; 63. Nail hole; 64. Set screw; 65. Hinge rod; 7. Pressure block; 8. Telescopic cylinder; 9. Connecting rod; 10. Fixing ring; 11. Pressure plate; 12. Spring; 13. Annular groove; 14. Support leg; 15. Groove; 16. Counterweight. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1 - Figure 7 This invention provides a method for preparing a periodic metamaterial containing carbon nanotube thin films, comprising the following steps:

[0033] S1: First, prepare carbon nanotube films with periodic structures;

[0034] S2: Use workbench 1 to evenly apply adhesive to the surface of the microwave absorbing coating 3 to form a thin and uniform coating;

[0035] S3: The prepared carbon nanotube film is placed on the surface of the microwave absorbing coating 3 coated with adhesive to obtain the composite material;

[0036] S4: The composite material was dried and cured using workbench 1 to obtain a microwave absorbing metamaterial with a periodic carbon nanotube film structure.

[0037] Furthermore, such asFigure 1 As shown in the S1, the carbon nanotube film with periodic structure is prepared by using a porous template.

[0038] Further, as shown in the S1, the carbon nanotube film with periodic structure is prepared by using a porous template. Figure 1 As shown in the S1, the carbon nanotube film with periodic structure is prepared by using a porous template.

[0039] Further, as shown in the S1, the carbon nanotube film with periodic structure is prepared by using a porous template. Figure 2 、 Figure 3 and Figure 5As shown, the workbench 1 middle rotationally connected with the rotating disc 2; The rotating disc 2 is placed on the wave-absorbing coating 3; The workbench 1 upper surface four edges are slidably connected with the symmetrically arranged slide rod 4; The slide rod 4 upper end is fixedly connected with the fixed block 5; The fixed block 5 is slidably connected with the pressure rod 6; The pressure rod 6 inner side end portion below is fixedly connected with the pressure block 7; The pressure rod 6 is provided with the adjusting assembly, and the adjusting assembly is used to adjust the position of the pressure rod 6 end; The slide rod 4 bottom is fixedly connected with the pressure plate 11; The workbench 1 bottom center is provided with the telescopic pneumatic cylinder 8; The telescopic pneumatic cylinder 8 output end is fixedly connected with the connecting rod 9 corresponding to the pressure plate 11; The connecting rod 9 is fixedly connected with the fixed ring 10 corresponding to the position of the pressure plate 11, and the fixed ring 10 is slidably connected on the pressure plate 11; The slide rod 4 is correspondingly provided with the spring 12 between the workbench 1 upper surface and the fixed block 5; The workbench 1 lower surface four corners are fixedly connected with the supporting leg 14. In order to prepare a kind of wave-absorbing metamaterial with low preparation cost, superior performance and simple process, carbon nanotube film with excellent electrical, thermal and mechanical properties is used as periodic structure to prepare wave-absorbing metamaterial, first, when preparing carbon nanotube film with periodic structure, it is divided into two methods, first, a template with micron or nanometer scale gap can be used, carbon nanotube solution is dropped on it, then carbon nanotube arrangement is controlled by pyrolysis method to achieve the purpose of preparing carbon nanotube film with periodic structure; The second can be prepared by CVD method and chemical vapor deposition method, the growth direction of carbon nanotube is controlled by controlling the catalyst on the base surface and the growth conditions to achieve the purpose of preparing carbon nanotube film with periodic structure, then the wave-absorbing coating 3 is placed on the rotating disc 2, after the position is determined, the telescopic motor, the connecting rod 9, the pressure plate 11 and the fixed ring 10 are matched, each slide rod 4 is moved downward synchronously, then the pressure rod 6 and the pressure block 7 on the pressure rod 6 position the wave-absorbing coating 3, then the rotating disc 2 is rotated manually to uniformly apply adhesive on the surface of the wave-absorbing coating 3, and form a thin and uniform coating, at this time, the prepared carbon nanotube film with periodic structure is placed above the wave-absorbing coating 3, the wave-absorbing coating 3 and the surface of the carbon nanotube film are connected in close contact by using adhesive, then the formed composite material is dried and heated to solidify, completely become one, and the wave-absorbing metamaterial containing carbon nanotube film periodic structure is prepared, since carbon nanotube is a light and high-strength material, compared with traditional metal periodic structure, it has lower density and higher strength, which makes the carbon nanotube film in periodic structure very advantageous in applications requiring low weight and high strength, and has the following characteristics:

[0040] (1) Wide spectrum wave absorption: carbon nanotube film can provide wide spectrum wave absorption performance, which can absorb electromagnetic radiation in multiple wavelength ranges, not just limited to specific frequencies, which is very useful in multi-band communication, radar systems and electromagnetic interference applications;

[0041] (2) Tunability: The size and arrangement of carbon nanotubes can be controlled through the fabrication process, allowing for customization of the wave-absorbing properties. This flexibility allows engineers to design the periodic structure for optimal performance based on the requirements of specific applications.

[0042] (3) High-temperature stability: Carbon nanotube films exhibit good stability at high temperatures, and are less prone to oxidation or degradation compared to some metals. This makes them suitable for high-temperature applications such as rocket shells and high-temperature industrial equipment, and they are also more resistant to corrosive environments than metal periodic structures.

[0043] (4) Electromagnetic transparency: Carbon nanotube films exhibit better electromagnetic transparency in certain frequency bands compared to metal periodic structures, which means they can reduce the reflection of electromagnetic signals, helping to reduce interference and improve communication quality.

[0044] In summary, the preparation of carbon nanotube films into periodic structures provides a series of advantageous properties for wave-absorbing materials, including lightweight, wide-spectrum wave absorption, tunability, high-temperature stability, corrosion resistance, and electromagnetic transparency. This makes them have wide application potential in various electromagnetic wave control and wave-absorbing applications.

[0045] Further, as shown in Figure 3 and Figure 6 , the adjusting assembly includes a first sliding groove 61 passing through the side wall of the pressing rod 6; the second sliding groove 62 larger than the first sliding groove 61 is formed on the pressing rod 6 corresponding to the position of the first sliding groove 61; the nail hole 63 is formed on one side of the fixing block 5 close to the second sliding groove 62; the jackscrew 64 is arranged in the nail hole 63; the hinge rod 65 is fixed to one end of the fixing block 5 away from the jackscrew 64, and the hinge rod 65 is located inside the first sliding groove 61. In order to adjust the positions of the pressing blocks 7 and fix the wave-absorbing coating 3 of different sizes, during specific operation, the pressing rod 6 is manually slid on the fixing block 5 to adjust the position of the pressing block 7, and then the jackscrew 64 is rotated to tighten the pressing rod 6 to fix the position of the pressing rod 6, thereby adjusting the positions of the pressing blocks 7 and fixing the wave-absorbing coating 3 of different sizes, and facilitating uniform application of the adhesive on the wave-absorbing coating 3. At the same time, in order to facilitate subsequent heating and drying and solidification of the composite material, the jackscrew 64 can be loosened during specific use, the pressing rod 6 is rotated around the hinge rod 65, the upper surface of the pressing rod 6 is pressed on the prepared composite material, the composite material is fixed and adhered to the surface of the turntable 2, and external factors such as wind are avoided to blow away the composite material.

[0046] Further, as shown in Figure 6As shown, the upper surface of the pressing rod 6 is convex arc; the end of the pressing rod 6 away from the pressing block 7 is provided with a groove 15; the groove 15 is provided with a counterweight 16. By designing the upper surface of the pressing rod 6 as convex arc, the right angle of the pressing rod 6 becomes smooth, avoiding local damage to the composite material, and the adhesive can also be uniformly coated on the wave-absorbing coating 3 by cooperating with the rotation of the turntable 2, and the counterweight 16 can increase the weight of the pressing rod 6 after turning over, so as to better press the composite material.

[0047] Further, as shown in Figure 3 The turntable 2 is provided with a heating sheet inside; the side wall of the turntable 2 is fixedly connected with a positive and negative copper ring 21 electrically connected with the heating sheet; the workbench 1 is fixedly connected with a power distribution ring 22 corresponding to the position of the copper ring 21, and the copper ring 21 is surface-adhered with the corresponding power distribution ring 22. In order to avoid damage to the composite material during transportation before drying and curing, the heating sheet is arranged in the turntable 2 to directly dry the composite material, which saves the transportation step and reduces the risk of damage, and the copper ring 21 and the power distribution ring 22 can cooperate to supply power to the heating sheet during the rotation of the turntable 2, avoiding cable winding.

[0048] Further, as shown in Figure 4 The upper surface of the workbench 1 is provided with an annular groove 13 corresponding to the position of the spring 12, and the lower end of the spring 12 is located at the bottom of the annular groove 13. When the telescopic cylinder 8 retracts, the spring 12 will top the fixed block 5 back to the original position, which is convenient for next use, and through the arrangement of the annular groove 13, the spring 12 is prevented from stacking when the telescopic cylinder 8 drives the spring 12 to compress and deform, which causes the pressing block 7 to be unable to continue to press down, and then unable to be surface-adhered with the wave-absorbing coating 3.

[0049] Working principle: Firstly, when preparing carbon nanotube film with periodic structure, it is divided into two methods, the first method is to use a template with micron or nanometer scale gap, drop the carbon nanotube solution on it, and then control the arrangement of carbon nanotube by pyrolysis method to achieve the purpose of preparing carbon nanotube film with periodic structure; The second method is to prepare by CVD method and chemical vapor deposition method, control the directional growth direction of carbon nanotube by controlling the catalyst on the surface of the base and the growth conditions, so as to achieve the purpose of preparing carbon nanotube film with periodic structure, then place the wave absorbing coating 3 on the turntable 2, determine the position, and then move the sliding rod 4 downward synchronously through the cooperation of the telescopic motor, the connecting rod 9, the pressure plate 11 and the fixing ring 10, so as to make the pressure rod 6 and the pressure block 7 on the pressure rod 6 position the wave absorbing coating 3, then rotate the turntable 2 manually to evenly coat the adhesive on the surface of the wave absorbing coating 3, and form a thin and uniform coating, at this time, place the prepared carbon nanotube film with periodic structure above the wave absorbing coating 3, and use the adhesive to connect the wave absorbing coating 3 and the surface of the carbon nanotube film closely, then dry the formed composite material to make it solidify completely, and obtain the wave absorbing metamaterial containing carbon nanotube film with periodic structure. Since carbon nanotube is a light and high-strength material, compared with traditional metal periodic structure, it has lower density and higher strength, which makes the carbon nanotube film with periodic structure in the application of low weight and high strength very advantageous, and has the following characteristics:

[0050] (1) Wide spectrum wave absorption: Carbon nanotube film can provide wide spectrum wave absorption performance, which can absorb electromagnetic radiation in multiple wavelength ranges, not just limited to specific frequencies, which is very useful in multi-band communication, radar systems and electromagnetic interference applications;

[0051] (2) Tunability: The size and arrangement of carbon nanotubes can be controlled through the preparation process, so that the wave absorption performance can be customized. This flexibility allows engineers to design periodic structures according to the requirements of specific applications to achieve the best performance;

[0052] (3) High temperature stability: It has good stability at high temperature, and it is not easy to oxidize or degrade in high temperature environment compared with some metals, which makes carbon nanotube film suitable for high temperature applications such as rocket shells and high temperature industrial equipment, and has good resistance to some corrosive environments, and is more durable than metal periodic structure;

[0053] (4) Electromagnetic transparency: Compared with metal periodic structure, carbon nanotube film shows better electromagnetic transparency in certain frequency bands, which means they can reduce the reflection of electromagnetic signals, thereby helping to reduce interference and improve communication quality;

[0054] In general, the preparation of carbon nanotube films into periodic structures can provide a series of favorable characteristics for wave-absorbing materials, including light weight, wide-spectrum wave absorption, controllability, high-temperature stability, corrosion resistance, and electromagnetic transparency, which makes them have wide application potential in various electromagnetic wave control and wave-absorbing applications.

[0055] The position of the pressing block 7 is adjusted by manually sliding the pressing rod 6 on the fixed block 5, and then the position of the pressing rod 6 is fixed by rotating the butterfly-shaped jackscrew 64 to fasten the pressing rod 6, so as to adjust the positions between the pressing blocks 7, and to fix the wave-absorbing coating 3 of different sizes, and to facilitate uniformly applying the adhesive on the wave-absorbing coating 3; meanwhile, in order to facilitate subsequent heating and drying, and to make it solidify into one body, the jackscrew 64 can be loosened in specific use, the pressing rod 6 is rotated around the hinge rod 65, the upper surface of the pressing rod 6 is pressed on the prepared composite material, the composite material is fixed, and the composite material is attached to the surface of the rotating disc 2, so as to avoid external interference.

[0056] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A method for preparing a periodic metamaterial containing carbon nanotube thin films, characterized in that: It comprises the following steps: S1: first prepare carbon nanotube film with periodic structure; S2: use the workbench (1) to evenly spread the adhesion agent on the surface of the wave-absorbing coating (3), and form a thin and uniform coating; S3: place the prepared carbon nanotube film on the surface of the wave-absorbing coating (3) coated with the adhesion agent to obtain a composite material; S4: use the workbench (1) to dry and cure the composite material to prepare a wave-absorbing metamaterial containing carbon nanotube film periodic structure; The middle part of the workbench (1) is rotatably connected with a rotating disc (2); the rotating disc (2) is placed with a wave-absorbing coating (3); the upper surface of the workbench (1) is slidably connected with symmetrically arranged slide rods (4); the upper end of the slide rod (4) is fixedly connected with a fixed block (5); the fixed block (5) is slidably connected with a pressing rod (6); the inner side end of the pressing rod (6) is fixedly connected with a pressing block (7) below; an adjusting assembly is arranged on the pressing rod (6), and the adjusting assembly is used to adjust the position of the end of the pressing rod (6); the bottom of the slide rod (4) is fixedly connected with a pressure receiving plate (11); the bottom center of the workbench (1) is provided with a telescopic air cylinder (8); the output end of the telescopic air cylinder (8) is fixedly connected with a connecting rod (9) corresponding to the pressure receiving plate (11); the connecting rod (9) is fixedly connected with a fixed ring (10) corresponding to the position of the pressure receiving plate (11), and the fixed ring (10) is slidably connected on the pressure receiving plate (11); the slide rod (4) is sleeved with a spring (12) corresponding to the position between the upper surface of the workbench (1) and the fixed block (5); the four corners of the lower surface of the workbench (1) are fixedly connected with supporting legs (14); the inside of the rotating disc (2) is provided with a heating sheet; The adjusting assembly comprises a first sliding groove (61) penetrating through the side wall of the pressing rod (6); the pressing rod (6) is provided with a second sliding groove (62) larger than the first sliding groove (61) corresponding to the position of the first sliding groove (61); a pin hole (63) is arranged on one side of the fixed block (5) close to the second sliding groove (62); a jackscrew (64) is arranged in the pin hole (63); one end of the fixed block (5) away from the jackscrew (64) is fixedly connected with a hinged rod (65), and the hinged rod (65) is located in the first sliding groove (61); the upper surface of the pressing rod (6) is a convex arc; a recess (15) is arranged on one end of the pressing rod (6) away from the pressing block (7); a counterweight (16) is arranged in the recess (15).

2. The method for preparing a periodic structure metamaterial containing carbon nanotube thin film according to claim 1, characterized in that: The carbon nanotube film with periodic structure in S1 is prepared by using a porous template.

3. The method of claim 2, wherein the method further comprises: The carbon nanotube film with periodic structure in S1 is prepared by using a chemical vapor deposition method.

4. The method of claim 3, wherein the method further comprises: The side wall of the rotating disc (2) is fixedly connected with positive and negative copper rings (21) electrically connected with the heating sheet; the workbench (1) is fixedly connected with a power distribution ring (22) corresponding to the copper ring (21), and the copper ring (21) is attached to the surface of the corresponding power distribution ring (22).

5. The method of claim 4, wherein the method further comprises: The upper surface of the workbench (1) is provided with an annular groove (13) corresponding to the position of the spring (12), and the lower end of the spring (12) is located at the bottom of the annular groove (13).

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