TWI478866B - Carbon nanotube film - Google Patents

Description

Nano carbon tube film

The invention relates to a nano material film, in particular to a carbon nanotube film.

Carbon Nanotube (CNT) is a new type of carbon material that was prepared in the laboratory by Japanese researcher Iijima in 1991 (see, Helical Microtubules of Graphitic Carbon, Nature, V354, P56-58 (1991)). The special structure of the carbon nanotubes determines its special properties, such as high tensile strength and high thermal stability. With the change of the helical mode of the carbon nanotubes, the carbon nanotubes can exhibit metallic or semiconducting properties. Because the carbon nanotubes have an ideal one-dimensional structure and excellent properties in the fields of mechanics, electricity, heat, etc., they have shown broad application prospects in the fields of materials science, chemistry, physics, etc., including field emission flat panel display. , electronic devices, Atomic Force Microscope (AFM) tips, thermal sensors, optical sensors, filters, etc.

Although the performance of the carbon nanotubes is excellent, it has a wide application prospect. However, since the carbon nanotubes are nanometer-scale, a large number of carbon nanotubes are easily agglomerated and are not easily dispersed to form a uniform macroscopic carbon nanotube structure, thereby limiting the The application of carbon nanotubes in macroscopic fields. In view of this, how to obtain macroscopic carbon nanotube structure is a key issue in the field of nanotechnology research.

In order to make a macroscopic carbon nanotube structure, the previous methods mainly include: direct growth method, spray method or Langmuir. Langmuir Blodgett (LB) method. Among them, the direct growth method is generally controlled by The carbon nanotube film structure is directly grown by chemical vapor deposition, for example, using sulfur as an additive or a multilayer catalyst or the like. The spraying method generally forms a carbon nanotube film structure by drying a carbon nanotube solution into an aqueous solution and coating it on a surface of a substrate. The LB method generally uses a nanocarbon tube solution to be mixed into another solution having a different density (such as an organic solvent), and utilizes molecular self-assembly motion, and the carbon nanotubes float out of the surface of the solution to form a carbon nanotube film structure.

However, the above method for preparing the carbon nanotube structure is generally complicated, and in the carbon nanotube film structure obtained by the direct growth method or the spray method, the carbon nanotubes tend to aggregate easily, resulting in uneven thickness of the film. The carbon nanotubes are disorderly arranged in the carbon nanotube structure, which is not conducive to giving full play to the performance of the carbon nanotubes.

In order to overcome the above problems, a simple method for obtaining an ordered carbon nanotube structure is disclosed in the Chinese patent No. ZL02134760.3, which was filed on Sep. 20, 2008, which is hereby incorporated by reference. The carbon nanotube structure is a continuous carbon nanotube rope obtained by directly pulling from an array of super-sequential carbon nanotubes. The carbon nanotubes in the prepared carbon nanotube rope are connected end to end and tightly bonded by van der Waals force. The length of the carbon nanotube string is not limited. Its width is related to the size of the substrate on which the carbon nanotube array is grown. Further, the carbon nanotube string comprises a plurality of end-to-end carbon nanotube segments, each of the carbon nanotube segments having substantially equal lengths and each of the carbon nanotube segments being composed of a plurality of mutually parallel nanometers. The carbon tube is formed, and the carbon nanotube segments are connected to each other by Van der Waals force.

Baughma, Ray, H. et al. 2005 in the literature "Strong, Transparent, Multifunctional, Carbon A method for preparing a carbon nanotube film is disclosed in Nanotube Sheets "Mei Zhang, Shaoli Fang, Anvar A. Zakhidov, Ray H. Baughman, etc.. Science, Vol. 309, P1215-1219 (2005). The carbon nanotube film can also be prepared by drawing from a carbon nanotube array. The carbon nanotube array is an array of carbon nanotubes grown on a substrate. The length of the carbon nanotube film is not limited. However, the width of the carbon nanotube film or rope prepared by the above two methods is limited by the size of the carbon nanotube array growth substrate (the previous substrate for growing the carbon nanotube array is generally 4 inches). It is impossible to prepare a large-area carbon nanotube film. In addition, the prepared carbon nanotube film has insufficient transmittance.

In view of this, it is necessary to provide a carbon nanotube film of a size that is not limited by the preparation substrate.

A carbon nanotube film, wherein the carbon nanotube film comprises a plurality of nano carbon pipelines arranged side by side and spaced apart, and at least one carbon nanotube is included between adjacent nano carbon pipelines, the plurality of nanometer tubes The distance between the carbon lines changes after being stressed.

Compared with the prior art, the carbon nanotube film provided by the technical solution has the following advantages: First, the carbon nanotube film can be stretched on an elastic support to prepare a large-area carbon nanotube. The membrane, and the size of the carbon nanotube membrane is not limited by the growth substrate. Secondly, the carbon nanotube film provided by the technical solution only needs to stretch the carbon nanotube film to improve the transmittance, and avoids the complicated treatment of the carbon nanotube film by complicated processes or expensive equipment. To increase the transparency of the carbon nanotube film, which can be widely It is widely used in devices with high requirements for transmittance, such as touch screens. Third, the carbon nanotube film has good tensile properties, so the carbon nanotube film can be used in elastic stretchable components and equipment.

The carbon nanotube film provided by the embodiment of the present technical solution and the stretching method thereof will be described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 to FIG. 4 , an embodiment of the present technical solution provides a carbon nanotube film 10 . The carbon nanotube film 10 includes a plurality of carbon nanotubes 100. A portion of the carbon nanotubes in the carbon nanotubes are connected end to end to form a nano carbon line 102. The carbon nanotubes in the nanocarbon pipeline 102 can be arranged along the axial direction of the nanocarbon pipeline, and the carbon nanotubes are closely connected by van der Waals force. The carbon nanotube membrane 10 includes a plurality of carbon nanotubes 102 arranged side by side and spaced apart. The nanocarbon pipelines 102 are tightly connected by van der Waals forces. The nanocarbon line 102 is uniformly distributed in the carbon nanotube film 10 and arranged in the first direction. The first direction is the D1 direction. At least one carbon nanotube 104 is included between adjacent nanocarbon lines 102. The arrangement direction of the partial carbon nanotubes 104 is not limited. The portion of the carbon nanotubes 104 can be in contact with at least two nanocarbon lines 102 disposed side by side with each other. Further, a plurality of carbon nanotubes 104 connected end to end may be included between the nanocarbon pipelines 102. There is a spacing 106 between the plurality of nanocarbon pipelines 102, and the distance between adjacent two nanocarbon pipelines 102 changes after being stressed. The carbon nanotubes 104 between the plurality of nanocarbon lines 102 and the nanocarbon line 102 form a carbon nanotube film 10 having a self-supporting structure. The so-called self-supporting structure of the carbon nanotube film 10, that is, the carbon nanotube film 10, can be maintained in a specific shape or can be partially disposed on a support to maintain its film without supporting it by a support. The structure is such that the structure of the carbon nanotube film 10 itself does not change. If the carbon nanotube film 10 is placed on a frame or two spaced apart support structures, the carbon nanotube film 10, which is not in contact with the frame or the support structure, can be suspended.

The carbon nanotube film 10 is deformed after being forced in a direction perpendicular to the carbon nanotube line 102. The direction perpendicular to the carbon nanotube line 102 is the D2 direction. The D2 direction is perpendicular to the D1 direction. When the carbon nanotube film 10 is stretched in the D2 direction, the carbon nanotube film 10 is deformed, and the distance between the carbon nanotubes 102 changes. Specifically, the distance between the carbon nanotubes 102 increases as the deformation rate of the carbon nanotube film 10 increases. The deformation rate of the carbon nanotube film 10 in the D2 direction is 300% or less. The distance between the adjacent nanocarbon lines 102 is greater than 0 microns and less than or equal to 50 microns. The distance between the adjacent nanocarbon lines 102 increases as the deformation rate of the carbon nanotube film 10 increases. The plurality of nanocarbon lines 102 can form a bundle of carbon nanotubes.

The length, width and thickness of the carbon nanotube film 10 are not limited and can be prepared according to actual needs. The thickness of the carbon nanotube film 10 is preferably 0.5 nm or more and 1 mm or less. The diameter of the carbon nanotubes 100 in the carbon nanotube film 10 is 0.5 nm or more and 50 nm or less. The length of the carbon nanotube 100 is 50 μm or more and 5 mm or less.

The deformation rate of the carbon nanotube film 10 in the D2 direction is related to the thickness and density of the carbon nanotube film 10. The larger the thickness and density of the carbon nanotube film 10, the greater the deformation rate in the D2 direction. Further, the deformation rate of the carbon nanotube film 10 and the carbon nanotube 104 between the carbon nanotubes 102 are further The content is related. Within a certain range of content, the more the content of the carbon nanotubes 104 between the nanocarbon lines 102, the greater the deformation rate of the carbon nanotube film 10 in the D2 direction. The deformation rate of the carbon nanotube film 10 in the D2 direction is 300% or less. In the embodiment of the technical solution, the carbon nanotube film 10 has a thickness of 50 nm, and the deformation rate in the D2 direction can reach 150%.

The transmittance (light transmission ratio) of the carbon nanotube film 10 is related to the thickness and density of the carbon nanotube film 10. The greater the thickness and density of the carbon nanotube film 10, the smaller the transmittance of the carbon nanotube film 10. Further, the transmittance of the carbon nanotube film 10 is related to the distance between the carbon nanotubes 102 and the content of the carbon nanotubes 104 between the adjacent nanocarbon lines 102. The greater the distance between the carbon nanotubes 102, the less the content of the carbon nanotubes 104 between the carbon nanotubes 102, the greater the transmittance of the carbon nanotube membranes 10. The carbon nanotube film 10 has a transmittance of 60% or more and 95% or less. In the embodiment of the present invention, when the thickness of the carbon nanotube film 10 is 50 nm, the transmittance of the carbon nanotube film 10 before stretching is 67% or more and 82% or less. When the deformation rate is 120%, the transmittance of the carbon nanotube film 10 is 84% or more and 92% or less. Taking the green light having a wavelength of 550 nm as an example, the transmittance of the carbon nanotube film 10 before stretching is 78%, and the transmittance of the carbon nanotube film 10 when the deformation rate is 120%. Up to 89%.

Since the carbon nanotube film 10 has good tensile properties, which can be deformed in the D2 direction, the carbon nanotube film 10 can be widely used in elastic stretchable members and equipment. In addition, the stretching method of the carbon nanotube film 10 provided by the technical solution avoids the complicated process and expensive equipment. For example, the laser irradiates the carbon nanotube film 10 to improve the transmittance of the carbon nanotube film 10, which can be widely applied to devices having high requirements for transmittance, such as a touch screen. In addition, the carbon nanotube film 10 can be used in a sounding device, and the carbon nanotube film 10 does not affect the sounding effect during stretching.

Referring to FIG. 5 and FIG. 6 simultaneously, the embodiment of the present technical solution further provides a method for stretching the carbon nanotube film 10, which specifically includes the following steps:

Step 1: providing at least one carbon nanotube film 10 and at least one elastic support body 20.

The preparation method of the carbon nanotube film 10 specifically includes the following steps: First, an array of carbon nanotubes is provided, and preferably, the array is a super-sequential carbon nanotube array.

The preparation method of the carbon nanotube array may be a chemical vapor deposition method. It can also be a graphite electrode constant current arc discharge deposition method, a laser evaporation deposition method, or the like.

Next, a carbon nanotube film 10 is obtained by drawing from the carbon nanotube array using a stretching tool.

The preparation method of the carbon nanotube film 10 specifically includes the following steps: (a) selecting one or a plurality of carbon nanotubes having a certain width from the array of carbon nanotubes, and the embodiment preferably adopts a certain width. The tape contacts the array of carbon nanotubes to select one or a plurality of carbon nanotubes having a certain width; (b) stretching the selected carbon nanotubes at a speed to form a plurality of carbon nanotubes connected end to end Fragment to form a continuous nano Carbon tube film 10.

In the above drawing process, the plurality of carbon nanotube segments are gradually separated from the substrate in the stretching direction under the pulling force, and the selected plurality of carbon nanotube segments are respectively associated with the other naphthalenes due to the van der Waals force. The carbon nanotube segments are continuously pulled out end to end to form a carbon nanotube film 10. In this embodiment, the width of the carbon nanotube film 10 is related to the size of the substrate on which the carbon nanotube array is grown. The length of the carbon nanotube film 10 is not limited and can be obtained according to actual needs. The thickness of the carbon nanotube film 10 is related to the selected carbon nanotube segments, and the thickness thereof ranges from 0.5 nm to 100 μm. In the embodiment of the technical solution, the carbon nanotube film 10 has a thickness of 50 nm.

Fig. 3 is a scanning electron micrograph of the carbon nanotube film 10 magnified 500 times. The carbon nanotube film 10 includes a plurality of nanocarbon lines 102 arranged side by side and spaced apart. The nanocarbon lines 102 are connected to each other by a van der Waals force. The nanocarbon line 102 is uniformly distributed in the carbon nanotube film 10 and arranged in the first direction. The first direction is the pulling direction of the carbon nanotube film, that is, the D1 direction. At least one carbon nanotube 104 is included between the nanocarbon lines 102. The arrangement direction of the partial carbon nanotubes 104 is not limited. The portion of the carbon nanotubes 104 can be in contact with at least two adjacent side-by-side carbon nanotubes 102. Further, a plurality of carbon nanotubes 104 connected end to end may be included between the nanocarbon pipelines 102. There is a distance between the plurality of nanocarbon pipelines 102, and the distance changes after being stressed. The carbon nanotubes 104 between the plurality of nanocarbon lines 102 and the nanocarbon line 102 form a carbon nanotube film 10 having a self-supporting structure.

Transmittance (light transmission ratio) of the carbon nanotube film 10 and a carbon nanotube The thickness and density of the film 10 are related. The greater the thickness and density of the carbon nanotube film 10, the smaller the transmittance of the carbon nanotube film 10. Further, the transmittance of the carbon nanotube film 10 is related to the distance between the adjacent nanocarbon lines 102 and the content of the carbon nanotubes 104 between the carbon nanotubes 102. The greater the distance between the carbon nanotubes 102, the less the content of the carbon nanotubes 104 between the carbon nanotubes 102, the greater the transmittance of the carbon nanotube membranes 10. Referring to FIG. 7, in the embodiment of the present technical solution, the directly prepared carbon nanotube film 10 has a thickness of 50 nm, and a transmittance of 67% or more and 82% or less.

The elastic support body 20 has better elasticity. The shape and structure of the elastic support body 20 are not limited, and may be a planar structure or a curved structure. The elastic support body 20 includes one or more of an elastic rubber, a spring, and a rubber band. The elastic support 20 can be used to support and stretch the carbon nanotube film 10.

Step 2: The at least one carbon nanotube film 10 is at least partially disposed on the at least one elastic support body 20.

The carbon nanotube film 10 can be directly disposed and attached to the surface of the elastic support body 20, and at this time, the elastic support body 20 is a substrate having a surface. In addition, the carbon nanotube film 10 may also be partially disposed on the surface of the elastic support body 20. For example, it is laid between two elastic support bodies 20. Since the carbon nanotube has a large specific surface area, the carbon nanotube film 10 itself has good adhesion under the action of the van der Waals force, and can be directly disposed on the elastic support body 20. It can be understood that in order to improve the bonding force between the carbon nanotube film 10 and the elastic support 20, the carbon nanotube film 10 can also be fixed to the elastic support 20 by an adhesive. In addition, the plurality of The carbon nanotube films 10 are stacked in the same direction to form a multi-layered carbon nanotube film. The first carbon nanotubes in the adjacent two layers of carbon nanotube film 10 are arranged in the same direction. When the carbon nanotube film is a carbon nanotube film directly pulled from an array of carbon nanotubes, a plurality of carbon nanotube films may be overlapped in the pulling direction. The carbon nanotube membranes arranged in an overlapping manner have a large thickness and can improve the deformation rate of the carbon nanotube film.

In the embodiment of the technical solution, the one carbon nanotube film 10 obtained by pulling is directly disposed on the two elastic support bodies 20. Referring to FIG. 6, the two elastic support bodies 20 are arranged in parallel and at intervals. The two elastic support bodies 20 are all disposed along the D2 direction. The carbon nanotube film 10 is disposed on the surface of the elastic support 20 by a binder. The binder is a layer of silver glue. Both ends of the carbon nanotube film 10 in the D1 direction are respectively fixed to the two elastic support bodies 20. When the carbon nanotube film 10 is disposed, the nanocarbon line 102 in the carbon nanotube film 10 extends in the direction of one elastic support 20 to the other elastic support 20.

Step 3: The elastic support 20 is stretched.

Specifically, the elastic support body 20 can be stretched by the stretching device by fixing the elastic support body 20 to a stretching device (not shown). In the embodiment of the technical solution, the two ends of the two elastic support bodies 20 can be respectively fixed on the stretching device.

The stretching speed is not limited and may be specifically selected depending on the carbon nanotube film 10 to be stretched. When the stretching speed is too large, the carbon nanotube film 10 is liable to be broken. Preferably, the elastic support 20 has a stretching speed of less than 10 cm per second. In the embodiment of the technical solution, the elastic support body 20 is pulled The stretching speed is 2 cm per second.

The stretching direction is related to the arrangement direction of the nanocarbon line 102 in at least one of the carbon nanotube films 10. When the carbon nanotube film 10 is a layer of the carbon nanotube film 10 obtained by direct drawing or a multilayered carbon nanotube film disposed in the same direction, the stretching direction is perpendicular to the carbon nanotube line. The direction of 102 is perpendicular to the pulling direction of the carbon nanotube film 10, that is, the direction D2.

Since the at least one carbon nanotube film 10 is fixed on the elastic support body 20, the carbon nanotube film 10 is also followed by the tensile force as the elastic support body 20 is stretched. Stretched. When the carbon nanotube film 10 is stretched in the D2 direction, the distance between the carbon nanotubes 102 changes. Specifically, the distance between the carbon nanotubes 102 increases as the deformation rate of the carbon nanotube film 10 increases. Since there is a distance between the carbon nanowires 102 and there is at least one carbon nanotube 104 between the nanocarbon pipelines 102, the nanocarbon pipeline 102 and the nanocarbon between them are drawn during stretching. The Van der Waals force connection can be maintained between the tubes 104, and the distance between the side-by-side nanocarbon lines 102 increases. Wherein, the distance between the nano carbon pipelines 102 arranged side by side before stretching is greater than 0 micrometers and less than 10 micrometers, and the distance between the nano carbon pipelines 102 arranged side by side after stretching is up to 50 micrometers. The carbon nanotube film 10 still maintains a film-like structure. When the plurality of carbon nanotube films 10 are overlapped to form a multilayer carbon nanotube film, since the carbon nanotubes 100 in the multilayer carbon nanotube film are more uniformly distributed and denser, when When the multilayered carbon nanotube film is stretched, a higher deformation rate can be obtained. The deformation rate of the carbon nanotube film 10 is 300% or less, and the morphology of the carbon nanotube film 10 can be substantially maintained. That is, the carbon nanotube film 10 can be increased by 300% based on the original size. In this embodiment, the nano carbon The tube film 10 is a single-layer carbon nanotube film in a direction perpendicular to the direction of the nanocarbon line 102, that is, the direction D2. The carbon nanotube film 10 has a deformation rate of 150% in the D2 direction. Fig. 4 is a scanning electron micrograph at a magnification of 500 times when the carbon nanotube film 10 is stretched by 120%. From the figure, it can be seen that the carbon nanotube film 10 after stretching is relatively thinner than the carbon nanotube film 10 before stretching. The distance between the carbon nanotubes 102 arranged side by side becomes large. As can be seen from FIG. 7, when the deformation rate is 120%, the carbon nanotube film 10 has a light transmittance of 84% to 92% for light having a wavelength of more than 190 nm and less than 900 nm. The resistance of the carbon nanotube film 10 in the stretching direction does not change during stretching.

Further, when the deformation rate is less than 60%, the distance between the side-by-side nanocarbon lines 102 can be up to 20 microns. The stretched carbon nanotube film 10 can be gradually returned to the carbon nanotube film 10 before stretching by the reverse pulling force. During the recovery, the distance between the nanocarbon lines 102 is gradually reduced, and the distance between the side-by-side nanocarbon lines 102 is gradually reduced. Therefore, the carbon nanotube film 10 can be expanded and contracted under the action of tensile force. The carbon nanotube film 10 can be widely used in a retractable device.

The carbon nanotube film 10 and the stretching method thereof provided by the embodiments of the present technical solution have the following advantages: First, the carbon nanotube film 10 can be stretched on an elastic support body 20 to prepare a large area. The carbon nanotube film, and the size of the carbon nanotube film is not limited by the growth substrate. Secondly, the method of stretching the carbon nanotube film 10 is to stretch the elastic support body 20 by disposing the carbon nanotube film 10 on at least one elastic support body 20. The stretching method is simple, The cost is lower. Third, the stretching method of the carbon nanotube film 10 provided by the technical solution avoids the complicated process and the expensive design. The step of performing subsequent processing on the carbon nanotube film 10 to improve the transmittance of the carbon nanotube film 10, which can be widely applied to devices having high requirements for transmittance, such as a touch screen. Wait. Fourth, since the carbon nanotube film 10 has good tensile properties, it can be stretched in a direction perpendicular to the nanocarbon line 102, so the carbon nanotube film 10 can be used for elasticity. Stretching components and equipment. Fifth, the method of the present invention for stretching the carbon nanotube film 10 is advantageous for preparing a large-sized carbon nanotube film, thereby facilitating the expansion of the application of the carbon nanotube film in a large-sized device.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by those skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10‧‧‧Nano carbon nanotube film

100‧‧‧Nano Carbon Tube

102‧‧‧Nano carbon pipeline

104‧‧‧Nanocarbon tubes between nano carbon pipelines

106‧‧‧ spacing

20‧‧‧elastic support

FIG. 1 is a schematic structural view of a carbon nanotube film according to an embodiment of the present technical solution.

2 is a partial enlarged structural view of FIG. 1.

3 is a scanning electron micrograph of a carbon nanotube film before stretching in the embodiment of the present technical solution.

4 is a scanning electron micrograph of a carbon nanotube film after stretching in the embodiment of the present technical solution.

FIG. 5 is a flow chart of a method for stretching a carbon nanotube film according to an embodiment of the present technical solution.

FIG. 6 is a schematic view showing the stretching of a carbon nanotube film according to an embodiment of the present technical solution.

7 is a comparison of transmittance of a carbon nanotube film before and after stretching in the embodiment of the present technical solution. schematic diagram.

10‧‧‧Nano carbon nanotube film

100‧‧‧Nano Carbon Tube

102‧‧‧Nano carbon pipeline

104‧‧‧Nanocarbon tubes between nano carbon pipelines

106‧‧‧ spacing

Claims (11)

A carbon nanotube film, the improvement is that the carbon nanotube film comprises a plurality of nano carbon pipelines arranged side by side and spaced apart, each of the nano carbon pipelines comprising a plurality of carbon nanotubes extending in the same direction, and Between the adjacent nanocarbon pipelines, at least one carbon nanotube is included, and the carbon nanotubes between the adjacent nanocarbon pipelines extend in a direction different from the extending direction of the nanocarbon pipelines, and The carbon nanotubes between the nano carbon line and the nano carbon line are connected by a van der Waals force, and the carbon nanotube film is in a tensile deformation state perpendicular to a direction in which the nano carbon line extends, and the The carbon nanotube film is a self-supporting structure. The carbon nanotube film according to claim 1, wherein the plurality of carbon nanotubes in the nanocarbon pipeline are connected end to end and arranged along the axial direction of the carbon nanotube, and the carbon nanotubes are arranged. The connection between the van der Valli is tight. The carbon nanotube film of claim 1, wherein the carbon nanotubes between the carbon nanotubes are in contact with at least two carbon nanotubes arranged side by side. The carbon nanotube film according to claim 1, wherein the carbon nanotubes comprise a plurality of carbon nanotubes connected end to end. The carbon nanotube film according to claim 1, wherein the carbon nanotubes between the plurality of carbon carbon tubes and the nanocarbon tubes in the carbon nanotube film form a network structure. The carbon nanotube film according to claim 1, wherein the carbon nanotube film has a tensile deformation rate in a direction perpendicular to the nanocarbon line of more than 0% and less than or equal to 300%. The carbon nanotube film according to claim 6, wherein the carbon nanotube film has a tensile deformation rate in a direction perpendicular to the carbon nanotube line, which is greater than 0% and less than or equal to 150%. The carbon nanotube film according to claim 6, wherein the distance between the carbon nanotube lines increases as the deformation rate of the carbon nanotube film increases. The carbon nanotube film of claim 1, wherein the distance between the adjacent nanocarbon lines is greater than 0 micrometers and less than or equal to 50 micrometers. The carbon nanotube film according to claim 1, wherein the carbon nanotube film has a thickness of 0.5 nm or more and 1 mm or less. The carbon nanotube film according to claim 1, wherein the carbon nanotube film has a transmittance of 60% or more and 95% or less.