TWI406811B - Method for making carbon nanotube film - Google Patents

Abstract

The present invention relates to a method for making a carbon nanotube film. The method includes: providing a carbon nanotube array grown on a substrate; pulling out a carbon nanotube film from the carbon nanotube array; providing a supporting body, the supporting body having a surface; neutralizing electric charges on the surface of the supporting body; laying the carbon nanotube film on the surface of the supporting body. The carbon nanotube film can be flatly adhered on the surface of the supporting body, because the electric charges on the surface of the supporting body have be neutralized, and there is no electric force between the carbon nanotube film and the supporting body.

Description

Method for preparing nano carbon tube film

The invention relates to a method for preparing a carbon nanotube film.

Nanocarbon tubes are a new type of one-dimensional nanomaterials discovered in the early 1990s, see "Helical microtubules of graphitic carbon", Sumio Iijima, Nature, vol. 354, p56 (1991). The special structure of the carbon nanotubes determines its special properties, such as high tensile strength and high thermal stability, and the carbon nanotubes can exhibit metallic or semiconducting properties as the nanocarbon tube spirals. . Since 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., in scientific research and industry. Applications are also receiving more and more attention.

Although the performance of the carbon nanotubes is excellent and has a wide range of applications, in general, the prepared carbon nanotubes are granular or powdery, which causes a lot of inconvenience to people's applications.

A method for preparing a polarizing element is disclosed in the specification of the Taiwan Patent Application Publication No. 200841052, which is issued on Oct. 16, 2008. The preparation method is specifically, using a stretching tool from an array of carbon nanotubes. Stretching to obtain a carbon nanotube film, and attaching the carbon nanotube film to a support to form a carbon nanotube film attached to the support, the support may be a Fixed frame or a transparent substrate. However, in the preparation method, when the support material is plastic or rubber, since the plastic or the rubber is extremely easy to carry static electricity, when the carbon nanotube film is attached to the support, There will be electricity between the carbon tube film and the support The interaction between the charges, so that the carbon nanotube film is not easily attached to the support, such as forming some streaks on the surface of the carbon nanotube film or causing damage to the carbon nanotube film.

In view of the above, there is provided a method for preparing a carbon nanotube film, and by the method for preparing the carbon nanotube film, it is necessary to obtain a carbon nanotube film which is uniformly attached to a support.

A method for preparing a carbon nanotube film, comprising: providing an array of carbon nanotubes grown on a substrate; pulling a carbon nanotube film from the array of carbon nanotubes; providing a support, The support has a surface that neutralizes the charge on the surface of the support and attaches the carbon nanotube film to the surface of the support that has neutralized the charge.

A method for preparing a carbon nanotube film, comprising: providing an array of carbon nanotubes grown on a substrate; providing a first base strip, and pulling the first base strip from the array of carbon nanotubes a carbon nanotube film; providing a second base strip for adhering the carbon nanotube film to the second base strip; providing a support body, the support body providing a surface to be adhered to the carbon nanotube film, The surface of the support is charged to neutralize the charge on the surface of the support; the carbon nanotube film between the first base strip and the second base strip is adhered to the neutralized charge surface of the support And cutting the carbon nanotube film along the edge of the support to form a carbon nanotube film adhered to the support.

Compared with the prior art, in the preparation process of the carbon nanotube film provided by the present invention, since the support is neutralized before or during the process of attaching the carbon nanotube film, When the carbon nanotube film is completely adhered to the support, there is no mutual repulsion or attraction between the carbon nanotube film and the charge on the surface of the support, thereby making the carbon nanotube film easier to flatten. Attached to the surface of the support body, which is beneficial to the application of the carbon nanotube film; at the same time, since there is no interaction between the prepared carbon nanotube film and the surface of the support, the carbon is made The membrane is not easily damaged and has a long service life.

110‧‧‧Sample table

112‧‧‧ plane

114,214‧‧‧Base

116,216‧‧‧Nano Carbon Tube Array

117‧‧‧ first end

118,218‧‧‧Nano carbon nanotube film

119‧‧‧ second end

120‧‧‧Base strip supply device

122‧‧‧Supply

124‧‧‧First base strip

126‧‧‧Second base

130‧‧‧Loading device

132‧‧‧stage

134,234‧‧‧Support

140‧‧‧ stretching tools

142‧‧‧fixer

144,244‧‧‧De-static device

220‧‧‧ first scroll

222‧‧‧ second reel

1 is a flow chart of a method for preparing a carbon nanotube film according to a first embodiment of the present invention.

2 is a schematic view showing a process of preparing a carbon nanotube film according to a first embodiment of the present invention.

Fig. 3 is a schematic view showing the process of removing static electricity from the surface of the support by using a destaticizing device before attaching the carbon nanotube film in the first embodiment of the present invention.

4 is a schematic view showing the process of removing static electricity on the surface of the support by using a destaticizing device in the process of attaching the carbon nanotube film in the first embodiment of the present invention.

Fig. 5 is a schematic view showing the process of removing static electricity from the surface of the wound large-area support by using a destaticizing device in the process of attaching the carbon nanotube film in the second embodiment of the present invention.

Hereinafter, a method for preparing a carbon nanotube film provided by an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1 and FIG. 2, a first embodiment of the present invention provides a method for preparing a carbon nanotube film, which includes the following steps: Step 1: providing a carbon nanotube array 116 grown on a substrate 114; Step 2 Providing a stretching device, the stretching device comprising at least one stretching tool 140, using the stretching tool 140 to pull a carbon nanotube film 118 from the carbon nanotube array 116; step three, providing a a support body 134 having a charge on the surface of the support body 134, neutralizing the charge on the surface of the support body 134, and attaching the carbon nanotube film 118 to the surface of the support body 134; Step 4, along the support body The carbon nanotube film 118 is cut off at the edge of 134 to form a carbon nanotube film 118 disposed on the support 134.

The steps will be explained below.

In the first step, the carbon nanotube array 116 is obtained by chemical vapor deposition, preferably a super The method for preparing the super-sequential carbon nanotube array comprises the following steps: (a) providing a substrate 114; (b) uniformly forming a catalyst layer on the surface of the substrate 114; The substrate 114 on which the catalyst layer is formed is annealed in air at 700 ° C to 900 ° C for about 30 minutes to 90 minutes; and (d) the substrate 114 is placed in a reactor and heated to 500 in a protective gas atmosphere. °C~740°C, and then reacted with a carbon source gas for about 5 minutes to 30 minutes to grow a super-sequential carbon nanotube array.

The substrate 114 may be a quartz substrate, a high temperature resistant glass substrate, a P-type or N-type germanium substrate, or a germanium substrate formed with an oxide layer. This embodiment is a germanium substrate.

The catalyst layer material may be one selected from the group consisting of iron (Fe), cobalt (Co), nickel (Ni), or any combination thereof.

The carbon source gas may be a chemically active hydrocarbon such as acetylene, and the protective gas may be nitrogen, ammonia or an inert gas.

The super-sequential carbon nanotube array is a pure carbon nanotube array formed by a plurality of carbon nanotubes arranged substantially parallel to each other and substantially perpendicular to the growth of the substrate 114, and has a height of 200 to 400 μm. The super-sequential carbon nanotube array is substantially free of impurities, such as amorphous carbon or residual catalyst metal particles, by controlling the growth conditions as described above. The plurality of carbon nanotubes in the array of carbon nanotubes 116 are in close contact with each other to form an array by van der Waals forces.

Additionally, the step further includes providing a sample stage 110 for supporting and securing the substrate 114. The sample stage 110 is a fixing device, and the sample stage 110 has a plane 112, the nano carbon The substrate 114 of the tube array 116 can be attached to the plane 112 of the sample stage 110 in a manner that includes snaps, bonds, and the like.

In step two, the stretching device includes at least one stretching tool 140, which may include a tweezers, a clip, an adhesive tape, or a hard base strip having a surface having an adhesive. In this embodiment, the stretching tool 140 includes a hard base strip having a surface having a glue, and the material of the base strip comprises a metal, glass, rubber or plastic material. Preferably, the material of the base strip is metal.

When the stretching device includes only the stretching tool 140, a specific method for pulling out a carbon nanotube film 118 from the carbon nanotube array 116 by using the stretching tool 140 is: contacting with the stretching tool 140. The carbon nanotube array 116 selects a carbon nanotube segment from the carbon nanotube array 116, the carbon nanotube segment being a portion of the carbon nanotube array 116; away from the carbon nanotube array 116 Moving the stretching tool 140 in the direction, the selected carbon nanotube segments are gradually moved away from the substrate, and the carbon nanotubes are continuously pulled out from the carbon nanotube array in an end-to-end manner, thereby stretching to obtain a nanometer. Carbon tube film 118.

In addition, in order to enable the obtained carbon nanotube film 118 to be continuously attached to the support, the stretching device may further include a substrate supply device 120 and a load device 130. The base strip supply device 120, the load carrying device 130 and the stretching tool 140 are sequentially disposed in the same direction on the same side of the sample stage 110, the base strip supply device 120 is adjacent to the sample stage 110, and the load carrying device 130 is disposed on the base. Between the strip supply device 120 and the stretching tool 140.

The strip supply device 120 is used to provide a base strip during the preparation of the carbon nanotube film 118, which includes a supply station 122. The supply table 122 can be moved up and down in a direction perpendicular to the horizontal plane. The lifting movement of the supply table 122 can be controlled by manual manual control or computer program, and the base strip supply device 120 can continuously supply the base strip on the supply table 122. In addition, the base strip can be freely moved away from the base strip supply device 120.

In use, the strip is used to stretch a carbon nanotube film 118 from the array of carbon nanotubes 116. Specifically, the base strip feeding device 120 first provides a first base strip 124 having a surface on the surface of the first strip 124 and bringing the first strip 124 close to and bonding the carbon nanotube array 116. The carbon nanotube film 118 is obtained by stretching the first base strip 124. In addition, the step of extracting a section of the carbon nanotube film 118 from the carbon nanotube array 116 is adhered to the first base strip 124, and then stretching the first base strip 124 to obtain the nanocarbon. The tube film 118. Specifically, a plurality of carbon nanotube tubes in the carbon nanotube array 116 are adhered by a tape, and then stretched toward the first base strip 124 to pre-stretch a section of the carbon nanotube film 118.

After the first base strip 124 stretches the carbon nanotube film 118 to a predetermined length, the strip supply device 120 may further provide a second base strip 126 for the second base strip 126 to be The elongated carbon nanotube film 118 contacts and adheres. After the carbon nanotube film 118 between the first base strip 124 and the second base strip 126 is cut, the second base strip 126 can continue to maintain the state in which the carbon nanotube film 128 is pulled out and the carbon nanotube film 118. The integrity is such that the carbon nanotube film 118 is continuously pulled and stretched from the carbon nanotube array 116. The strip supply device 120 contacts and adheres to the carbon nanotube film 118 through a continuous supply strip to maintain the stretched state of the carbon nanotube film 118, thereby ensuring the continuous operation of the carbon nanotube film 128. Stretching.

The loading device 130 includes a stage 132 on one side of the sample stage 110, and the loading device 130 is disposed in a pulling direction of the subsequently drawn carbon nanotube film 118. The load device 130 can be moved horizontally along the direction in which the carbon nanotube film 118 is pulled out. The stage 132 of the load device 130 can be rotated 360 degrees around its central axis, and can also move up and down in a direction perpendicular to the horizontal plane. The movement of the load device 130 is controlled by a computer program. The load device 130 is used to carry the support body 134.

The stretching tool 140 can further include a holder 142, which can be a U-shaped clip having an open end facing the carbon nanotube array 116, the width of the open end being adjustable. The holder 142 The horizontal direction is controlled to control the pulling direction of the carbon nanotube film 118, and can also be moved vertically downwards. The moving direction and moving speed of the holder 142 can be controlled by a computer program. In use, the holder 142 can clamp the ends of the first base strip 124 and level the carbon nanotube film 118 in the direction in which the carbon nanotube film 118 is pulled out.

The process of pulling out a carbon nanotube film 118 from the carbon nanotube array 116 by using the above stretching device specifically includes:

(a) moving the first base strip 124 provided by the base strip supply device 120 in the stretching device such that the first base strip 124 is adjacent to the carbon nanotube array 116 and the first base strip 124 is contacted And selecting a plurality of carbon nanotubes in the carbon nanotube array 116; since the surface of the first base strip 124 has a glue, the first base strip 124 can be bonded to the carbon nanotube array 116. The number of carbon nanotubes.

(b) moving the first base strip 124 in a direction away from the carbon nanotube array 116, so that the carbon nanotubes are continuously pulled out from the array of carbon nanotubes end to end, thereby obtaining one nanometer. Carbon tube film 118.

Specifically, the first base strip 124 is moved at a speed and an angle. The angle is an angle between the stretching direction of the carbon nanotube film 118 and the growth direction of the carbon nanotube array 116, preferably 30 to 90 degrees, and the preferred angle in this embodiment is 85 degrees. The stretching speed is preferably from 1 mm/sec to 100 mm/sec. During the stretching process, the selected plurality of carbon nanotubes are gradually separated from the substrate 114 in the stretching direction by the tensile force, and the selected plurality of carbon nanotubes are selected due to the van der Waals force. The adjacent plurality of carbon nanotubes are also continuously pulled out end to end to form a carbon nanotube film 118. The carbon nanotube film 118 is formed by aligning a plurality of aligned carbon nanotube tubes end to end with a fixed width. The arrangement direction of the carbon nanotubes in the carbon nanotube film 118 is substantially parallel to the stretching direction of the carbon nanotube film 118. The width of the carbon nanotube film 118 and the carbon nanotube array 116 The size of the substrate 114 to be grown is related to the length of the carbon nanotube film 118, which can be obtained according to actual needs. Since the carbon nanotubes in the super-sequential carbon nanotube array 116 provided in the first step of the embodiment are very pure, and because the specific surface area of the carbon nanotubes themselves is very large, the carbon nanotube film 118 itself With a strong viscosity, the carbon nanotube film 118 can be directly adhered to the base strip by its own viscosity.

(c) Fixing the first base strip 124 to the stretching tool 140 and stretching the carbon nanotube film 118.

The holder 142 on the stretching tool 140 is moved closer to the first base strip 124; the first base strip 124 is fixed to the stretching tool 140 using the holder 142; and the position of the holder 142 on the stretching tool 140 is adjusted. The carbon nanotube film 118 is horizontally stretched away from the carbon nanotube array 116 to the direction between the substrate feeding device 120 and the stretching tool 140 in the direction in which the substrate feeding device 120, the loading device 130, and the stretching tool 140 are located.

In this embodiment, the holder 142 is a U-shaped clip, and the width of the open end is adjustable. The U-shaped clip holder 142 is moved to the first base strip 124 such that the first base strip 124 is at the U-shaped clip opening, and the width of the U-shaped clip opening is adjusted to sandwich the length of the first base strip 124. At both ends, the first base strip 124 is fixed to the stretching tool 140.

(d) The carbon nanotube film 118 is adhered to the second base strip 126 provided by the base strip supply device 120.

The base strip supply device 120 provides a second base strip 126 that adjusts the height of the base strip supply device 120 to adhere the second base strip 126 to the bottom of the carbon nanotube film 118.

At this time, the carbon nanotube film 118 between the first base strip 124 and the second base strip 126 is in a floating state.

It can be understood that the base strip feeding device 120 and the stretching tool 140 in the above stretching device are optional devices, and the strip feeding device 120 and the stretching tool 140 are all automated for realizing the preparation process of the carbon nanotube film 118. And the design, since the preparation process can be automated, the carbon nanotube film 118 can be realized. Mass production. The process of stretching the carbon nanotube film 118 can also be manually passed through the substrate to the carbon nanotube array 116 and the carbon nanotube array 116 is selected from the carbon nanotube array 116. The carbon nanotube film 118 can be pulled out by moving the carbon nanotubes in a direction away from the carbon nanotube array 116.

In the third step, the support body 134 is a supporting substrate having a fixed shape, which may be a substrate or a fixed frame structure. The support body 134 of this embodiment is a square substrate. The material of the support body 134 may be selected from any material such as metal, plastic, rubber or glass. The support body 134 is susceptible to static electricity due to the influence of the external environment, that is, the surface of the support body 134 may have some positive or negative charges.

The method for neutralizing the charge on the surface of the support body 134 includes: (1) at least neutralizing the surface of the support body 134 by using a destaticizing device to charge the surface of the carbon nanotube film 118; (2) The support body 134 is grounded so that the charge carried on the surface of the support body 134 is guided away; (3) when the carbon nanotube film 118 is attached to the surface of the support body 134, the nanometer is made The carbon tube film 118 is grounded.

Please refer to FIG. 3, wherein in the method (1), the destaticizing device 144 may include an ion fan, an ion tuyere or an ion wind bar, preferably an ion fan, which can generate a positive and negative airflow due to the ion fan. The support body 134, therefore, when the surface of the support body 134 has a negative charge, the negative charge attracts a positive charge in the gas flow, and when the surface of the support body 134 has a positive charge, the positive charge attracts a negative force in the gas flow. The charge is such that the charge on the surface of the support 134 is neutralized to achieve the purpose of eliminating static electricity.

Further, in the method (1), the destaticizing device 144 is used to generate a positively and negatively charged airflow toward or during the process of attaching the carbon nanotube film 118 to the surface of the support 134. The support body 134 can achieve the purpose of neutralizing the surface charge of the support body 134.

Referring to FIG. 4, a specific method for neutralizing the charge of the surface of the support body 134 during the process of attaching the carbon nanotube film 118 to the surface of the support body 134 is as follows: the carbon nanotube film 118 includes a first The first end 117 and the second end 119 contact the first end 117 of the carbon nanotube film 118 with the surface of the support 134; the second end 119 of the carbon nanotube film 118 is gradually brought into contact with Attached to the surface of the support body 134 such that the entire carbon nanotube film 118 is gradually attached to the surface of the support body 134 from the first end 117 to the second end 119, during the attaching process, The positively and negatively charged gas stream is gradually blown through the surface of the support 134 to be attached to the carbon nanotube film 118. In order to prevent the airflow generated by the destaticizing device 144 from damaging the carbon nanotube film 118, the destaticizing device 144 can be blown to the support 134 at an appropriate angle. Specifically, the destaticizing device 144 is disposed at a spatial position between the carbon nanotube film 118 and the surface of the support body 134 to be laid with the carbon nanotube film 118, the spatial position including the carbon nanotube film The area covered by the 118 and located above the support 134 also includes the area below the carbon nanotube film 118 above the support 134 that is not covered by the carbon nanotube film 118. Preferably, the direction of the airflow generated by the destaticizing device 144 is parallel to the surface of the support 134 to be laid, perpendicular to the attachment direction of the carbon nanotube film 118 attached to the surface of the support 134, and the attachment direction refers to A portion of the carbon nanotube film 118 that has been attached to the support 134 is directed in the direction of a portion of the carbon nanotube film 118 to be attached to the support 134, so that the airflow generated by the destaticizing device 144 is blown as little as possible. The carbon nanotube film 118 is placed to ensure that the carbon nanotube film 118 is not blown by the gas stream.

Specifically, the method (2) specifically connects the surface of the support body 134 to the ground through an electric conductor, even if the surface of the support body 134 is equipotential to the earth, so that the electric charge on the surface of the support body 134 can be released through the electric conductor. Earth, such as the support body 134 is placed on a metal substrate, the metal substrate is grounded, so that the charge existing on the surface of the support body 134 is guided away through the metal substrate. Specifically, in this embodiment, the loading device 130 may be made of a metal material, and the loading device 130 is grounded. When the supporting body 134 is disposed on the loading device 130, the loading device 130 may be The charge on the surface of the support 134 is conducted away.

Specifically, in the method (3), when the carbon nanotube film 118 is attached to the surface of the support body 134, a conductor is electrically connected to the carbon nanotube film 118, and the conductor is grounded at the same time. The two ends of the carbon nanotube film 118 are held by two metal holding tools, and the metal holding tool is grounded. Specifically, when the carbon nanotube film 118 is in contact with the support 134, the charge on the surface of the support 134 is adsorbed by the carbon nanotube film 118 due to the carbon nanotube film. The carbon nanotubes included in 118 are electrically conductive, so that the adsorbed charges are guided by the carbon nanotubes themselves to the conductors to which they are electrically connected, and the conductors are grounded to further conduct the charge. Neutralizes the surface charge of the support 134. In this embodiment, since the base strip is in direct contact with the carbon nanotube film 118, the base strip can be made of a conductive material such as metal, and the base strip can be directly grounded.

Further, during the process of neutralizing the charge on the surface of the support body 134, the relative humidity of the air can be further controlled within a range of 50% to 60%. Due to the high relative humidity of the air, the surface resistance of the support 134 can be reduced, the surface conductivity of the support 134 can be increased, and the release of the charge can be accelerated. This embodiment employs the method (1) to neutralize the charge on the surface of the support 134.

Moreover, the step further includes disposing the support body 134 on the stage 132. The position of the stage 132 is adjusted such that the support body 134 disposed on the stage 132 is located below the carbon nanotube film 118 between the first base strip 124 and the second base strip 126, and the load is adjusted. The relative position between the stage 132 and the holder 142 causes the bottom of the carbon nanotube film 118 to be in sufficient contact with the support 134 to adhere the carbon nanotube film 118 between the first base strip 124 and the second base strip 126. On the support body 134.

In step 4, after the step 3 is completed, that is, after the carbon nanotube film 118 is attached to the surface of the support body 134, the carbon nanotube film 118 is cut along the edge of the support body 134, specifically A portion of the carbon nanotube film 118 beyond the edge of the support 134 may be cut along the periphery of the support 134. At this time, a single-layer carbon nanotube film structure is formed on the support 134. The second base strip 126 The carbon nanotube film 118 is maintained in a stretched state, and the step (c) and the step (d), the third step and the fourth step included in the second step may be repeated, and the support body 134 may be replaced without replacing the support body 134. The multi-layered carbon nanotube film 118 is adhered to the support body 134; since the stage 132 can be rotated 360°, the support body 134 can be rotated to adjust the superimposed angle of the adjacent two layers of the carbon nanotube film 118 on the support body 134. A multilayer carbon nanotube membrane structure was obtained. Specifically, the method includes the steps of: fixing the second base strip 126 to the stretching tool 140, continuing to stretch the carbon nanotube film 118; and adhering the carbon nanotube film 118 to the third of the base strip supply device 120. On the base strip; rotating the stage 132, adjusting the angle of the support body 134, and adhering the carbon nanotube film 118 between the second base strip 126 and the third base strip to the support body 134; along the edge of the support body 134 The carbon nanotube film is cut off.

Referring to FIG. 5, a second embodiment of the present invention provides a method for preparing a carbon nanotube film. The method includes the following steps: Step 1: providing a carbon nanotube array 216 grown on a substrate 214; A carbon nanotube film 218 is pulled out from the carbon nanotube array 216; in step three, a support body 234 is provided, and the surface of the support body 234 is charged to neutralize the charge on the surface of the support body 234, and The carbon nanotube film 218 is attached to the surface of the support body 234; in step 4, the carbon nanotube film 218 is cut along the edge of the support body 234 to form a nanometer disposed on the support body 234. Carbon tube film 218.

The first step, the second step and the fourth step of the embodiment are basically the same as the first step, the second step and the fourth step of the first embodiment, and will not be further described herein. The following will focus on the detailed description of Step 3.

In this embodiment, the support body 234 is a layered substrate wound on a first reel 220, and the layered substrate has a first surface and a second surface. That is, the support body 234 is a flexible base body. In this embodiment, the support body 234 is composed of a large area of flexible rubber. In order to sufficiently destaticize the wound support body 234, a static dismounting device 244 may be used to destaticize the support body 234 during the process of attaching the carbon nanotube film 218 to the support body 234. . Specifically, first, one end of the carbon nanotube film 218 obtained by stretching is attached to the first surface of the layered substrate; secondly, the charge of the first surface of the layered substrate is neutralized, and the neutralized layered substrate The method of charging the first surface is to provide a destaticizing device 244, which can generate a positively and negatively charged gas stream, and the positively and negatively charged gas stream is gradually blown toward the carbon nanotube film to be attached 218. a first surface of the layered substrate; finally, rotating the first reel 220 such that the layered substrate gradually disengages from the first reel 220 in the same direction as the drawn carbon nanotube film 218, away from the nanocarbon The tube array 216 extends in a direction such that the carbon nanotube film 218 is continuously drawn from the carbon nanotube array 216 to form a continuous carbon nanotube film 218 and attached to the first surface of the layered substrate. . During this process, the layered substrate first passes through a gas stream with positive and negative charges during the extension process, after which the carbon nanotube film 218 is gradually attached to the first surface of the layered substrate. Further, the present embodiment can provide a second reel 222 on which the layered substrate covered with the carbon nanotube film 218 is wound. The bonding force of the first surface of the layered substrate to the carbon nanotubes can be much greater than the bonding force of the second surface to the carbon nanotubes, so that the winding on the second reel 222 is covered with nanometer The layered substrate of the carbon tube film 218 can be pulled apart as needed.

It can be seen that the destaticizing method can be used in the process of continuously laying a large area of the carbon nanotube film 218 on the large-area support body 234.

The preparation method of the carbon nanotube film of the invention has the following advantages: in the preparation process of the above carbon nanotube film, since the support body has been destaticized, when the carbon nanotube film is adhered to the support body There is no mutual exclusion or attraction between the carbon nanotube film and the charge on the surface of the support. Applying force, so that the carbon nanotube film is easily attached to the surface of the support, which is beneficial to the application of the carbon nanotube film; at the same time, due to the preparation of the carbon nanotube film and the surface of the support There is no interaction between each other, so that the carbon nanotube film is not easily broken and has a long service life. In the process of continuously laying the carbon nanotube film on the large-area windable flexible support body, the large-area support body can be sufficiently destaticized, so that a large area can be uniformly laid on the support body. On the carbon nanotube film.

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 persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

117‧‧‧ first end

118‧‧‧Nano carbon film

119‧‧‧ second end

134‧‧‧Support

144‧‧‧De-static device

Claims (18)

A method for preparing a carbon nanotube film, comprising: providing an array of carbon nanotubes grown on a substrate; pulling a carbon nanotube film from the array of carbon nanotubes; providing a support, The support has a surface that neutralizes the charge on the surface of the support and attaches the carbon nanotube film to the surface of the support that has neutralized the charge. The method for preparing a carbon nanotube film according to claim 1, wherein the method of neutralizing the surface charge of the support is to use a charge in the destaticizing device and the surface of the support. The method for preparing a carbon nanotube film according to claim 2, wherein the destaticizing device is an ion fan, an ion wind gun, an ion tuyere or an ion wind bar. The method for preparing a carbon nanotube film according to claim 3, wherein the step of attaching the carbon nanotube film to the surface of the support body is performed by using the destaticizing device A positively and negatively charged gas stream is blown toward the surface of the support. The method for preparing a carbon nanotube film according to claim 4, wherein the method of attaching the carbon nanotube film to the surface of the support is: the carbon nanotube film One of the first ends is in contact with the surface of the support; the second end of the carbon nanotube film is gradually brought closer to and attached to the surface of the support, so that the entire carbon nanotube film is entirely from the first end to The second end is gradually attached to the surface of the support. In the above process, the positively and negatively charged gas stream is gradually blown over the surface of the support to be attached to the carbon nanotube film. The method for preparing a carbon nanotube film according to claim 5, wherein the destaticizing device generates a gas flow direction parallel to the surface of the support and is attached to the surface of the support perpendicular to the carbon nanotube film. Attachment direction. The method for preparing a carbon nanotube film according to claim 1, wherein the method of neutralizing the surface charge of the support body is to ground the support body to thereby charge the support body. Was guided away. The method for preparing a carbon nanotube film according to claim 1, wherein the method of neutralizing the surface charge of the support is to ground the carbon nanotube film and ground the ground A carbon nanotube film is attached to the surface of the support, and during the attaching, the charge on the surface of the support is conducted through the grounded carbon nanotube film. The method for preparing a carbon nanotube film according to claim 1, wherein the surface of the carbon nanotube film is attached to the surface of the support in an air humidity range of 50% to 60%. In the environment. The method for preparing a carbon nanotube film according to claim 1, wherein the step of pulling out a carbon nanotube film from the carbon nanotube array further comprises the following process: providing a stretching tool Adhering the stretching tool to the array of carbon nanotubes; selecting a plurality of carbon nanotubes in the array of carbon nanotubes by the stretching tool; moving at a speed away from the array of carbon nanotubes The stretching tool is thereby stretched to obtain a carbon nanotube film. The method for preparing a carbon nanotube film according to claim 1, wherein the support body is a layered substrate wound on a first reel, the layered substrate having a first surface and a a second surface, the method of neutralizing the charge on the surface of the support, and attaching the carbon nanotube film to the surface of the support that has neutralized the charge specifically includes the following steps: placing the carbon nanotube One end of the film is attached to the first surface of the layered substrate; neutralizing the charge of the first surface of the layered substrate; rotating the first reel so that the layered substrate is in the same direction as the drawn carbon nanotube film Gradually detaching from the first reel, extending away from the array of carbon nanotubes, so that the carbon nanotube film is continuously pulled out from the carbon nanotube array to form a continuous carbon nanotube film and attached On the first surface of the layered substrate. The method for preparing a carbon nanotube film according to claim 11, wherein the first surface of the layered substrate has a bonding force to the carbon nanotubes that is much larger than the second surface to the carbon nanotubes. The bonding force further provides a second reel on which the layered substrate covered with the carbon nanotube film is wound. The method for preparing a carbon nanotube film according to claim 11, wherein the method of neutralizing the charge of the first surface of the layered substrate is to blow the layered substrate with a positively and negatively charged gas stream. The first surface causes the layered substrate to pass through a positively and negatively charged gas stream during the extension process, and then the carbon nanotube film is gradually attached to the first surface of the layered substrate. A method for preparing a carbon nanotube film, comprising: providing an array of carbon nanotubes grown on a substrate; providing a first base strip, and pulling the first base strip from the array of carbon nanotubes a carbon nanotube film; providing a second base strip for adhering the carbon nanotube film to the second base strip; providing a support having a surface with a charge to neutralize the surface of the support a charge; a carbon nanotube film between the first base strip and the second base strip is adhered to the neutralized charge surface of the support; and the nanocarbon is cut along the edge of the support The film is formed to form a carbon nanotube film adhered to the support. The method for preparing a carbon nanotube film according to claim 14, wherein the method further comprises: moving the second base strip, continuing to stretch the carbon nanotube film; providing a third base strip, Adhering the third strip to the stretched carbon nanotube film; moving the support to which the carbon nanotube film is adhered, and the carbon between the second strip and the third strip a tube film adhered to the support; The carbon nanotube film between the second base strip and the third base strip is cut along the edge of the support to obtain a double-layered carbon nanotube film adhered to the support. The method for preparing a carbon nanotube film according to claim 14, wherein the method of neutralizing the surface charge of the support is to use a charge in a destaticizing device and the surface of the support. The method for preparing a carbon nanotube film according to claim 14, wherein the method of neutralizing the charge on the surface of the support body is to ground the support body so that the support body carries The charge is led away. The method for preparing a carbon nanotube film according to claim 14, wherein the method of neutralizing the charge on the surface of the support is: grounding the carbon nanotube film, and grounding the ground The carbon nanotube film is attached to the surface of the support, and during the attaching, the charge on the surface of the support is guided away through the grounded carbon nanotube film.