TWI438318B - Carbon nanotube composite wire structure and method for making the same - Google Patents

Description

Nano carbon tube composite linear structure and preparation method thereof

The invention relates to a carbon nanotube material and a preparation method thereof, in particular to a nano carbon tube composite linear structure and a preparation method thereof.

Since the early 1990s, nanomaterials represented by carbon nanotubes have attracted great attention due to their unique structure and properties. In recent years, with the deepening of research on carbon nanotubes and nanomaterials, its broad application prospects are constantly emerging. For example, due to the unique electromagnetic, optical, mechanical, and chemical properties of carbon nanotubes, a large number of applications related to field emission electron sources, sensors, new optical materials, soft ferromagnetic materials, etc. Was reported.

In particular, the composite of carbon nanotubes with other materials such as metals, semiconductors or polymers can complement or enhance the advantages of the materials. The carbon nanotubes have a large aspect ratio and a hollow structure, and have excellent mechanical properties, electrical properties, optical properties, etc., and in the composite material, the composite material can be enhanced to make the composite material better. Performance. Research on carbon nanotube composites has become an extremely important area.

The carbon nanotube metal composite material in the prior art generally comprises metal particles and a carbon nanotube tube, the metal particles are uniformly mixed and dispersed with the carbon nanotube tube; or the metal particles are uniformly dispersed in the carbon nanotube film or the nano carbon tube. in. The above carbon nanotube metal composite material The metal is usually deposited on the carbon nanotube material by vapor deposition or chemically dispersed in the carbon nanotube material. The prior art does not provide a carbon nanotube composite wire structure comprising a wire, a preparation method of the carbon nanotube composite wire structure, and a device for preparing the carbon nanotube composite wire structure.

In view of this, it is indeed necessary to provide a nano-carbon tube composite linear structure with better mechanical properties and toughness and a relatively simple method for preparing the nano-carbon tube composite linear structure.

A carbon nanotube composite linear structure comprising an electrically conductive linear structure and a carbon nanotube layer disposed around the electrically conductive linear structure, the carbon nanotube layer being a continuous layered structure The carbon carbon tube is composed.

A carbon nanotube composite linear structure comprising a plurality of carbon nanotubes, wherein further comprising a conductive linear structure, the plurality of carbon nanotubes being closely connected around the conductive linear structure by a van der Waals force.

A carbon nanotube composite linear structure comprising: a conductive linear structure and a carbon nanotube structure, the carbon nanotube structure is a self-supporting structure, and is wrapped around the conductive linear structure The entire surface.

A method for preparing a carbon nanotube composite linear structure, comprising the steps of: providing a conductive linear structure and a carbon nanotube structure; and winding the carbon nanotube structure around the conductive linear structure surface.

Compared with the prior art, the nano carbon tube composite linear structure and the preparation method thereof provided by the invention have the following advantages: First, since the carbon nanotube has good mechanical properties and toughness, and has the ability to enhance and recombine it. The role of the properties of the material, so, The carbon nanotubes in the carbon nanotube composite linear structure are uniformly distributed on the surface of the conductive linear structure, so that the carbon nanotube composite linear structure has better mechanical properties and toughness. Secondly, the carbon nanotube composite linear structure provided by the present invention is prepared by winding a carbon nanotube structure on the surface of the conductive linear structure, so that the preparation method is relatively simple and easy to implement.

10‧‧‧Nano Carbon Tube Composite Wire Structure

100‧‧‧ preparation device

12‧‧‧Gold silk

14‧‧‧Nano carbon tube layer

142‧‧‧Nano Carbon Tube

15‧‧‧Nano carbon nanotube film

16‧‧‧ spool

18‧‧‧Nano Carbon Tube Array

20‧‧‧Supply unit

22‧‧‧ pillar

24‧‧‧Guide axis

26‧‧‧Fixed ring

30‧‧‧Wrap unit

32‧‧‧ drive mechanism

320‧‧‧Transmission mechanism

322‧‧‧First pulley

324‧‧‧Second pulley

326‧‧‧ drive belt

328; 42‧‧‧ motor

33‧‧‧ bearing

34‧‧‧ hollow rotating shaft

342‧‧‧Anti-loose bearing nut

344; 442‧‧‧ central axis

35‧‧‧ support

36‧‧‧Flower plate

362‧‧‧Support table

38‧‧‧shading components

382‧‧‧ cavity

40‧‧‧Collection unit

44‧‧‧ collecting shaft

50‧‧‧Base

60‧‧‧ Positioning components

62‧‧‧Positioning holes

1 is a scanning electron micrograph of a carbon nanotube film provided by an embodiment of the present invention.

2 is a scanning electron micrograph of a composite carbon wire structure of a carbon nanotube provided by an embodiment of the present invention.

3 is a schematic view showing a cross section of a composite carbon wire structure of the carbon nanotube in FIG.

4 is a front elevational, partial cross-sectional view showing the apparatus for preparing a carbon nanotube composite wire structure provided by the present invention.

Figure 5 is a top plan cross-sectional view showing the apparatus for preparing a carbon nanotube composite wire structure of Figure 4;

Fig. 6 is a perspective view showing the three-dimensional structure of the disk of the apparatus for preparing a carbon nanotube composite linear structure in Fig. 4.

Fig. 7 is a schematic view showing the preparation of the carbon nanotube composite linear structure shown in Fig. 2 by the preparation apparatus provided in Fig. 4.

The carbon nanotube composite linear structure provided by the present invention, the preparation method of the nano carbon tube composite linear structure, and the device for preparing the carbon nanotube composite linear structure are further described below with reference to the accompanying drawings and specific embodiments. Detailed description.

The invention provides a carbon nanotube composite linear structure, the nano carbon tube composite linear structure comprising a conductive linear structure and a carbon nanotube layer disposed around the conductive linear structure. The carbon nanotube layer is a continuous layered structure and is composed of a plurality of carbon nanotubes which are closely connected by a van der waals force and along the electrically conductive linear structure The axial direction is evenly distributed around the electrically conductive linear structure.

The electrically conductive linear structure has the function of supporting the plurality of carbon nanotubes, so the electrically conductive linear structure should have a certain strength and toughness. The electrically conductive linear structure may be a metal, and the metal is a simple metal wire or a simple metal wire. The elemental metal material may be a metal material such as gold, silver, copper or aluminum. The material of the electrically conductive linear structure may also be an alloy material such as a copper-tin alloy. The conductive linear structure may also be a composite linear structure having a conductive layer, such as further coating an aluminum film on the surface of the copper-tin alloy; and plating a gold film on the surface of a fiber. The diameter of the electrically conductive linear structure is not limited as long as the electrically conductive linear structure has a certain strength. When the electrically conductive linear structure is a gold wire, the diameter of the gold wire may be 18 micrometers; when the electrically conductive linear structure is aluminum The wire may have a diameter of 25 microns.

The carbon nanotube layer is formed by tightly winding a carbon nanotube structure along the axial direction of the electrically conductive linear structure. The carbon nanotube structure is a self-supporting structure and is wrapped around the entire surface of the electrically conductive linear structure; preferably, the carbon nanotube structure is spirally wound and coated along the axial direction of the electrically conductive linear structure. The surface of the electrically conductive linear structure. Therefore, it can also be said that the carbon nanotube composite linear structure is composed of the electrically conductive linear structure and a carbon nanotube structure wound around the entire surface of the electrically conductive linear structure.

Wherein, the carbon nanotube structure is composed of a plurality of carbon nanotubes, and the plurality of carbon nanotubes are disorderly or orderedly arranged. The so-called disordered arrangement means that the arrangement direction of the carbon nanotubes is irregular. . The so-called ordered arrangement means that the arrangement direction of the carbon nanotubes is regular. Specifically, when the carbon nanotube structure includes a disordered arrangement of carbon nanotubes, the carbon nanotubes are entangled or isotropically arranged; when the carbon nanotube structure includes an ordered arrangement of carbon nanotubes, The carbon nanotubes are arranged in a preferred orientation in one direction or in a plurality of directions. By "preferable orientation" is meant that most of the carbon nanotubes in the carbon nanotube structure have a greater probability of orientation in one direction; that is, most of the carbon nanotubes in the carbon nanotube structure The axial directions extend substantially in the same direction. Wherein, the carbon nanotube structure is at least one carbon nanotube film, at least one nano carbon line or a combination thereof.

The carbon nanotube film may be a carbon nanotube film, a carbon nanotube film, and a carbon nanotube film.

Referring to FIG. 1, the carbon nanotube film is a self-supporting structure composed of a plurality of carbon nanotubes. The plurality of carbon nanotubes are arranged in a preferred orientation along the same direction. Most of the carbon nanotubes in the carbon nanotube film are oriented in the same direction. Moreover, the overall extension direction of the majority of the carbon nanotubes is substantially parallel to the surface of the carbon nanotube film. Further, most of the carbon nanotubes in the carbon nanotube film are connected end to end by van der Waals force. Specifically, each of the carbon nanotubes in the majority of the carbon nanotubes extending in the same direction in the carbon nanotube film and the carbon nanotubes adjacent in the extending direction are end to end by the van der Waals force Connected. Of course, there are a small number of randomly arranged carbon nanotubes in the carbon nanotube film, and these carbon nanotubes do not significantly affect the overall orientation of most of the carbon nanotubes in the carbon nanotube film. The carbon nanotube film does not need a large area of support, but as long as the supporting force is provided on both sides, the whole film can be suspended and maintained in a self-membranous state, that is, the carbon nanotube film is placed (or fixed) at intervals. When the two supports are disposed, the carbon nanotube film located between the two supports can be suspended to maintain its own film state.

Specifically, the plurality of carbon nanotubes extending substantially in the same direction in the carbon nanotube film are not absolutely linear and may be appropriately bent; or are not completely aligned in the extending direction, and may be appropriately deviated from the extending direction. . Therefore, it is not possible to exclude partial contact between the carbon nanotubes juxtaposed in the majority of the carbon nanotubes extending substantially in the same direction of the carbon nanotube film.

Specifically, the carbon nanotube film comprises a plurality of continuous and aligned carbon nanotube segments. The plurality of carbon nanotube segments are connected end to end by van der Waals force. Each of the carbon nanotube segments includes a plurality of mutually parallel carbon nanotubes, and the plurality of mutually parallel carbon nanotubes are tightly coupled by van der Waals force. The carbon nanotube segments have any length, thickness, uniformity, and shape. The carbon nanotubes in the carbon nanotube film are arranged in a preferred orientation in the same direction.

The carbon nanotube film can be obtained by directly drawing from a carbon nanotube array. The specific method for extracting the carbon nanotube film from the carbon nanotube array comprises: (a) selecting a carbon nanotube segment from the carbon nanotube array by using a stretching tool, the embodiment Preferably, the carbon nanotube array is contacted with a tape or a viscous strip having a certain width to select a carbon nanotube segment having a certain width; (b) being pulled at a certain speed by moving the stretching tool The selected carbon nanotube segments are pulled out of the plurality of carbon nanotube segments end to end to form a continuous carbon nanotube film. The plurality of carbon nanotubes are arranged side by side such that the carbon nanotube segments have a certain width. When the selected carbon nanotube segment is gradually separated from the growth substrate of the carbon nanotube array in the pulling direction under the pulling force, adjacent to the selected carbon nanotube segment due to the effect of van der Waals force The other carbon nanotube segments are successively pulled out end to end to form a continuous, uniform carbon nanotube film having a certain width and a preferred orientation.

It can be understood that the carbon nanotube films of different areas and thicknesses can be prepared by laminating and/or laminating the plurality of carbon nanotube films in parallel and without gaps. Each nano carbon tube film may have a thickness of 0.5 nm to 100 μm. When the carbon nanotube film comprises a plurality of stacked carbon nanotube film, the arrangement direction of the carbon nanotubes in the adjacent carbon nanotube film forms an angle α, 0° ≦ α ≦ 90°. For the structure of the carbon nanotube film and the preparation method thereof, please refer to the publication of the publication of the Chinese Patent Publication No. 200833862, which was published on August 16, 2008 by Fan Shoushan et al.

The carbon nanotube rolled film comprises a plurality of uniformly distributed carbon nanotubes, the plurality of carbon nanotubes being disordered, arranged in the same direction or in different directions, and the axial directions of the plurality of carbon nanotubes are in the same direction Or extend in different directions. The carbon nanotubes in the carbon nanotube rolled film partially overlap each other and are closely attracted to each other by van der Waals force. The carbon nanotube rolled film can be obtained by rolling an array of carbon nanotubes. The carbon nanotube array is formed on a surface of the substrate, and the carbon nanotubes in the prepared carbon nanotube rolled film form an angle β with the surface of the substrate of the carbon nanotube array, wherein β is greater than or equal to 0 degrees. And less than or equal to 15 degrees (0 ° ≦ β ≦ 15 °). Preferably, the axial direction of the carbon nanotubes in the carbon nanotube rolled film is substantially parallel to the surface of the carbon nanotube rolled film. The carbon nanotubes in the carbon nanotube rolled film have different arrangements depending on the manner of rolling. The area and thickness of the carbon nanotube rolled film are not limited and can be selected according to actual needs. The area of the carbon nanotube rolled film is substantially the same as the size of the carbon nanotube array. The thickness of the carbon nanotube film is related to the height of the carbon nanotube array and the pressure of the rolling, and may be from 1 micrometer to 100 micrometers. The carbon nanotube rolled film and the preparation method thereof can be found in the publication of the Republic of China patent application No. 200900348 published by Fan Shoushan et al. on January 1, 2009.

The carbon nanotube flocculation membrane comprises intertwined carbon nanotubes, the length of the carbon nanotubes Can be greater than 10 cm. The carbon nanotubes are attracted and entangled with each other by van der Waals force to form a network structure. The carbon nanotube flocculation membrane is isotropic. The carbon nanotubes in the carbon nanotube flocculation membrane are uniformly distributed and randomly arranged to form a large number of microporous structures. It can be understood that the length, width and thickness of the carbon nanotube film are not limited, and may be selected according to actual needs, and the thickness may be from 1 micrometer to 100 micrometers. For the carbon nanotube flocculation membrane and the preparation method thereof, please refer to the publication of the Republic of China patent application No. 200844041 published on November 16, 2008.

The nanocarbon line can be a non-twisted nano carbon line or a twisted nano carbon line.

The non-twisted nanocarbon pipeline may include a plurality of carbon nanotubes aligned along an axial direction of the non-twisted nanocarbon pipeline. The non-twisted nanocarbon line can be obtained by treating the carbon nanotube film with an organic solvent. Specifically, the carbon nanotube film comprises a plurality of carbon nanotube segments, and the plurality of carbon nanotube segments are connected end to end by a van der Waals force, and each of the carbon nanotube segments includes a plurality of parallel and mutually exclusive The silicon carbide tightly combined with the carbon nanotubes. The carbon nanotube segments have any length, thickness, uniformity, and shape. The non-twisted nano carbon line is not limited in length and has a diameter of 0.5 nm to 1 mm. Specifically, the organic solvent may be immersed in the entire surface of the carbon nanotube film, and the parallel carbon nanometer carbon in the carbon nanotube film may be pulled under the surface tension generated by the volatile organic solvent volatilization. The tube is tightly bonded by van der Waals to shrink the nano carbon tube film into a non-twisted nano carbon line. The organic solvent is a volatile organic solvent such as ethanol, methanol, acetone, dichloroethane or chloroform, and ethanol is used in this embodiment. The non-twisted nanocarbon line treated by the organic solvent has a smaller specific surface area and a lower viscosity than the carbon nanotube film which is not treated with the organic solvent.

The twisted nanocarbon pipeline includes a plurality of axial spirals around the twisted nanocarbon pipeline Arranged carbon nanotubes. The nanocarbon pipeline can be obtained by twisting both ends of the carbon nanotube film in the opposite direction by a mechanical force. Further, the twisted nanocarbon line can be treated with a volatile organic solvent. Under the action of the surface tension generated by the volatilization of the volatile organic solvent, the ratio of the twisted nanocarbon pipeline to the adjacent carbon nanotubes in the twisted nanocarbon pipeline after treatment is tightly combined by the van der Waals force. The surface area is reduced, and the density and strength are increased.

For the nano carbon pipeline and its preparation method, please refer to the patent filed by Fan Shoushan et al. on November 5, 2002, announced on November 21, 2008, and the publication number is I303239; and in 2005 12 The application for the month of July 16, 2009, announced on July 21, 2009, the announcement number is I312337 of the Republic of China patent.

When the carbon nanotube layer is composed of a carbon nanotube film or a non-twisted nano carbon line, the carbon nanotube composite wire structure is tightly wound around the conductive wire structure by the conductive wire structure a carbon nanotube film or a non-twisted nano carbon line of a structural surface, the carbon nanotube layer being composed of the plurality of carbon nanotubes, and most of the carbon nanotubes in the plurality of carbon nanotubes The axial direction of the electrically conductive linear structure is wound around the surface of the electrically conductive linear structure, and the majority of the carbon nanotubes are connected end to end with a van der Waals force. Further, most of the carbon nanotubes in the carbon nanotube layer extend substantially helically along the axial direction of the electrically conductive linear structure. Specifically, most of the carbon nanotubes in the carbon nanotube layer extend end to end along the axial spiral of the conductive linear structure, and the extending direction of each of the carbon nanotubes in the majority of the carbon nanotubes Forming a certain intersection angle α with the axial direction of the electrically conductive linear structure, 0° < α ≦ 90°. Most of the carbon nanotubes in the carbon nanotube film or the non-twisted nano carbon pipeline extend in substantially the same direction, so the nano carbon nanotube composite linear structure has substantially the same extending direction of the nanometer. The carbon tube and the axial direction of the electrically conductive linear structure have basic The same cross angle.

When the carbon nanotube layer is composed of a carbon nanotube flocculation film, the carbon nanotube composite linear structure is composed of the conductive linear structure and a carbon nanotube tightly wound around the surface of the conductive linear structure a flocculation membrane composition, the carbon nanotube flocculation membrane being composed of a plurality of carbon nanotubes, the plurality of carbon nanotubes forming a network shape, and closely and uniformly surrounding the axial direction of the electrically conductive linear structure On the surface of the electrically conductive linear structure.

When the carbon nanotube layer is composed of the carbon nanotube rolled film, the carbon nanotube composite linear structure is composed of the conductive linear structure and the nylon wound tightly wound on the surface of the conductive linear structure The carbon carbon tube is composed of a laminated film. If the carbon nanotubes in the carbon nanotube rolled film are disorderly arranged, the carbon nanotubes are randomly and uniformly surrounded around the conductive linear structure in the axial direction. Linear structure. If the carbon nanotubes in the carbon nanotube rolled film are preferentially extended in the same direction or in the plural direction, the carbon nanotubes extending in the same direction preferably have the same axial direction as the conductive linear structure. a crossing angle, and the included angle is greater than 0° and less than or equal to 90°; in addition, the carbon nanotube extending in the preferential direction of the plurality of directions is closely arranged around the conductive linear structure, and the carbon nanotubes in the same extending direction It has substantially the same angle with the axial direction of the electrically conductive linear structure.

When the carbon nanotube layer is composed of a twisted nanocarbon line, the carbon nanotube composite linear structure is twisted by the conductive linear structure and tightly and without gaps on the surface of the conductive linear structure The composition of the nano carbon pipeline. The carbon nanotubes in the twisted nanocarbon line are evenly distributed around the conductive linear structure along the axial direction of the electrically conductive linear structure without gaps.

Since the carbon nanotube has good mechanical properties and toughness and has the function of enhancing the properties of the material composited therewith, the carbon nanotube composite has a linear structure The carbon nanotubes are evenly wound around the surface of the electrically conductive linear structure, so that the carbon nanotube composite linear structure has better mechanical properties and toughness. This is mainly because the carbon nanotubes are wound around the surface of the electrically conductive linear structure, and when a tensile force is applied to the carbon nanotube composite linear structure, the carbon nanotubes in the carbon nanotube composite linear structure A frictional force is generated between the electrically conductive linear structure. The electrically conductive linear structure in the composite structure of the carbon nanotubes is stretched in the direction of the tensile force, and the frictional force is prevented due to the friction between the carbon nanotubes and the electrically conductive linear structure. The conductive linear structure is pulled off. Therefore, the length of the conductive linear structure in the carbon nanotube composite linear structure when pulled off is greater than the length when the pure conductive linear structure is pulled off; In the case of the same pulling force, the carbon nanotube composite linear structure is not easily broken. The performance of the carbon nanotube composite linear structure is related not only to the performance of the conductive linear structure in which the bit is formed, but also to the winding mode, quality, etc. of the carbon nanotube film wound on the surface of the conductive linear structure. related.

The present invention also provides a method for preparing the above-mentioned carbon nanotube composite linear structure, the preparation method comprising the steps of: a. providing a conductive linear structure and a carbon nanotube structure; and b. placing the carbon nanotube structure Winding on the surface of the electrically conductive linear structure.

Wherein, the conductive linear structure in the step a is generally a metal wire or a metal wire. The electrically conductive linear structure has a certain strength and can function to support the carbon nanotube structure. The carbon nanotube structure is at least one carbon nanotube film, at least one nano carbon line structure or a combination thereof. The carbon nanotube film may be a carbon nanotube film, a carbon nanotube film, a carbon nanotube film, or the like. The nanocarbon line-like structure may be a non-twisted nano carbon line or a twisted nano carbon line. The carbon nanotube film or non-twisted nano carbon line can be directly drawn from a carbon nanotube array.

Step b can be achieved by the following method: the first method, the carbon nanotube structure is adhered to the conductive linear structure, the conductive linear structure is rotated, and the conductive linear structure is controlled to perform linear motion Or controlling the carbon nanotube structure to make a linear motion, so that the carbon nanotube structure is wound around the conductive linear structure, thereby achieving continuous preparation of the carbon nanotube composite linear structure. Wherein, the carbon nanotube structure may not rotate, or may rotate in reverse with the conductive linear structure.

a second method of adhering the carbon nanotube structure to the electrically conductive linear structure, rotating the carbon nanotube structure around the electrically conductive linear structure, and controlling the electrically conductive linear structure to make a straight line along the axial direction thereof Moving or controlling the carbon nanotube structure to move linearly along the axial direction of the conductive linear structure, so that the carbon nanotube structure is continuously wound around the surface of the conductive linear structure, thereby realizing continuous preparation of the nano tube Carbon tube composite wire structure.

The step b further includes the step of collecting the carbon nanotube composite wire structure.

Providing at least one carbon nanotube array when the carbon nanotube structure is a carbon nanotube film or a non-twisted nano carbon line; stretching from each carbon nanotube array using a stretching tool A carbon nanotube film or a non-twisted nanocarbon line is formed to form the carbon nanotube structure. Adhering the carbon nanotube structure to the electrically conductive linear structure; rotating the electrically conductive linear structure or rotating the carbon nanotube structure to wrap the carbon nanotube structure around the electrically conductive linear structure surface. The carbon nanotube structure is continuously drawn continuously from the at least one carbon nanotube array during the winding of the carbon nanotube structure on the surface of the electrically conductive linear structure.

Referring to FIG. 4 to FIG. 6 , the present invention also provides a preparation of a carbon nanotube composite linear structure. Device 100. The preparation device 100 includes a supply unit 20, a cladding unit 30, a collection unit 40, and a base 50. The supply unit 20 is configured to provide a linear structure, wherein the linear structure includes not only a conductive linear structure but also a non-conductive linear structure, such as a rayon structure such as carbon fiber or Kevlar; a natural fiber structure such as spider silk or silk. . The coating unit 30 is configured to place an array of carbon nanotubes, and the carbon nanotube array can prepare a carbon nanotube structure; the coating unit 30 can also rotate the carbon nanotube structure to make the nano carbon The tube structure is wound around the surface of the linear structure. The collecting unit 40 is configured to pull the linear structure to perform linear motion, and collect the carbon nanotube composite linear structure. The base 50 is configured to carry the supply unit 20, the covering unit 30, and the collecting unit 40. Wherein, the carbon nanotube structure described in the preparation device 100 is at least one carbon nanotube film, at least one non-twisted nano carbon pipeline or a combination thereof.

The base 50 is a flat plate structure. The supply unit 20 , the covering unit 30 and the collecting unit 40 are fixed to the base 50 . The base 50 is generally made of a metal material such as steel or hard aluminum.

The supply unit 20 includes a support post 22, a guide shaft 24, a spool 16 and two retaining rings 26. One end of the strut 22 is fixed to the base 50 such that the strut 22 is disposed perpendicular to the base 50. One end of the guide shaft 24 is fixed to the pillar 22 and is disposed perpendicular to the pillar 22, and the other end is suspended. The bobbin 16 is disposed on the guide shaft 24, and the bobbin 16 is free to rotate on the guide shaft 24. The spool 16 is for winding the electrically conductive wire structure. The two fixing rings 26 are disposed on the guiding shaft 24 and are respectively located at two sides of the bobbin 16 for limiting the position of the bobbin 16 on the guiding shaft 24, preventing the bobbin 16 from guiding from the guiding shaft 24 The shaft 24 is detached. It can be understood that the number of the fixing rings 26 is not limited, and may be one, three or more, only It is desirable to be able to limit the position of the bobbin 16 on the guide shaft 24.

The cladding unit 30 includes a carrier that can be placed on a substrate on which an array of carbon nanotubes is grown. Specifically, the covering unit 30 includes a driving mechanism 32, a hollow rotating shaft 34, two bearings 33, two supporting seats 35, a disk 36 and a shielding member 38. The driving mechanism 32 is disposed at one end of the hollow rotating shaft 34 adjacent to the feeding unit 20, and the disk 36 is disposed at the other end of the hollow rotating shaft 34. Each of the support bases 35 is provided with one of the bearings 33, and the hollow rotary shaft 34 is disposed on each of the support bases 35 by the bearings 33 and supported by the two support bases 35. The driving mechanism 32 is configured to drive the hollow rotating shaft 34 to rotate and drive the disk 36 to rotate. The shielding element 38 is used to contain the faceplate 36.

The drive mechanism 32 includes a transmission mechanism 320 and a first motor 328. The transmission mechanism 320 is disposed on the first motor 328 and driven by the first motor 328. The transmission mechanism 320 includes a first pulley 322, a second pulley 324 and a transmission belt 326. The first pulley 322 is fixed to the rotating shaft of the first motor 328. The second pulley 324 is spaced apart from the first pulley 322 and is fixed to the hollow rotating shaft 34. The transmission belt 326 is sleeved on the second pulley 324 and the first pulley 322. The first pulley 322 is rotated by controlling the operation of the first motor 328, and the first pulley 322 drives the second pulley 324 to rotate by the belt 326 disposed thereon. Thereby the second pulley 324 drives the hollow rotating shaft 34 to rotate. That is to say, the operating speed of the first motor 328 can determine the rotational speed of the hollow rotating shaft 34. It can be understood that the specific structure of the driving mechanism 32 is not limited as long as it can drive the hollow rotating shaft 34 to rotate.

The hollow rotating shaft 34 is disposed parallel to the base 50. One side of the hollow rotating shaft 34 on which the second pulley 324 is disposed is provided with a loosening bearing nut 342, which is anti-loose A bearing nut 342 is disposed at an end of the hollow rotating shaft 34 adjacent to the supply unit 20 for preventing the second pulley 324 from falling off the hollow rotating shaft 34 during operation. The hollow rotating shaft 34 has a central shaft 344 which is substantially in the same plane as the highest point of the guide shaft 24 of the supply unit 20. The hollow rotary shaft 34 is rotatable clockwise or counterclockwise about the central axis 344 of the hollow rotary shaft 34 under the drive of the drive mechanism 32.

The two support seats 35 are fixed to the base 50 for fixing and supporting the hollow rotating shaft 34. The two support seats 35 are spaced apart between the drive mechanism 32 and the face plate 36. The second pulley 324 of the driving mechanism 32 is disposed between one of the support seats 35 and the anti-loose bearing nut 342 to prevent the second pulley 324 from operating along the hollow rotating shaft during operation. The direction of extension of 34 moves, even from the hollow rotating shaft 34. It can be understood that the number of the support seats 35 is not limited, and may be one, three, or the like as long as it can support the hollow rotating shaft 34.

The disk 36 is sleeved and fixed to the hollow rotating shaft 34 and is suspended from the base 50. Therefore, when the hollow rotating shaft 34 rotates, the face plate 36 rotates together with the hollow rotating shaft 34 about the central axis 344 of the hollow rotating shaft 34. Since the rotation of the hollow rotating shaft 34 is controlled by the first motor 328 of the drive mechanism 32, the rotational speed of the disk 36 is controlled by the operating speed of the first motor 328. Specifically, the faceplate 36 is shaped like a multi-ribbed table, such as a triangular prism, a quadrangular prism, a pentagonal table, a hexagonal table, a seven-segment table, and the like. The face plate 36 has a plurality of sides, and a support table 362 is disposed on each side. Therefore, the face plate 36 has a plurality of support tables 362, and each support table 362 forms an angle with the central axis 344 of the hollow rotary shaft 34. And disposed toward the collection unit 40. The plurality of support tables 362 surround the hollow rotating shaft 34 The central axis 344 is evenly distributed. The plurality of support tables 362 are used to place an array of carbon nanotubes that can be stretched out of the carbon nanotube film. In this embodiment, the faceplate 36 has a shape similar to a hexagonal table. The hexagonal prism has six sides, that is, the faceplate 36 has six support faces, and each support face is provided with a support stand 362, and each support stand The angle 362 is toward the collecting unit 40 and is at an angle of 45 with the central axis 344 of the hollow rotating shaft 34.

The shielding member 38 has a receiving cavity 382, and the flower disk 36 is suspended and accommodated in the receiving cavity 382. When the covering unit 30 is in operation, the shielding member 38 can prevent the carbon nanotube array disposed on the faceplate 36 from being pulled out from the disk 36 when the disk 36 is operated at a high speed, thereby damaging the bag. A person or thing surrounding the unit 30. In addition, the shielding member 38 can also prevent impurities such as dust from falling onto the carbon nanotube array disposed on the faceplate 36, contaminating the carbon nanotube array. It will be appreciated that the screening element 38 is an optional structure.

The collecting unit 40 is fixed to a side of the base 50 adjacent to the face plate 36 of the covering unit 30. The collection unit 40 includes a second motor 42 and a collection shaft 44. The collecting shaft 44 is fixed to the rotating shaft of the second motor 42 and is suspended from the base 50. The central axis 442 of the collecting shaft 44 is disposed perpendicular to the central axis 344 of the hollow rotating shaft 34. The highest point of the collecting shaft 44 is substantially in the same plane as the central axis 344 of the hollow rotating shaft 34. The collecting shaft 44 is rotatable about its central axis 442 under the driving of the second motor 42, and the linear structure can be pulled to linearly move and the prepared carbon nanotube composite linear structure is collected on the collecting shaft 44. . Therefore, the rotation speed of the collecting shaft 44 can be controlled according to the operating speed of the second motor 42, that is, by controlling the running speed of the second motor 42, the pulling speed of the collecting shaft 44 to the linear structure can be controlled. The collection speed of the carbon nanotube composite linear structure.

The preparation device 100 can also include two positioning elements 60, the two positioning elements Each of the 60 has a positioning hole 62 whose center is substantially in the same plane as the central axis 344 of the hollow rotating shaft 34 of the covering unit 30. The two positioning elements 60 ensure that the linear structures are substantially in the same plane and do not hit the inner wall of the hollow rotating shaft 34. Specifically, one of the positioning elements 60 is disposed between the supply unit 20 and the cladding unit 30, mainly to ensure that the linear structure provided by the supply unit 20 can be suspended through the cladding unit 30. Hollow rotating shaft 34. Another positioning member 60 is disposed between the covering unit 30 and the collecting unit 40 to ensure that the carbon nanotube composite wire structure prepared by the preparing device 100 can be the highest point of the collecting shaft 44 It is substantially in the same plane and can be wound on the collecting shaft 44 preferably. Obviously, the positioning element 60 is of an alternative construction and the number of positioning elements 60 is not limited.

The method for preparing a carbon nanotube composite linear structure using the above-described preparation apparatus 100 includes the steps of: S10 providing a linear structure by the supply unit 20; S20 passing the linear structure through the hollow of the coating unit 30 a rotating shaft 34 is fixed to the collecting unit 40; S30 provides a carbon nanotube structure by the covering unit 30, and adheres the carbon nanotube structure to the linear structure; and S40 controls the coating The drive mechanism 32 of the unit 30 rotates the faceplate 36 while controlling the collection unit 40 to pull the linear structure for linear motion such that the carbon nanotube structure is helically wound around the wire structure.

The step S10 can be achieved by providing a bobbin 16 wound with the linear structure; fixing the bobbin 16 wound around the wire structure to the supply unit Guide shaft 24 of 20. The bobbin 16 wound around the wire-like structure is rotatable about the guide shaft 24.

The step S20 is specifically: suspending the free end of the bobbin 16 wound around the wire-like structure through the hollow rotating shaft 34; then, winding the linear structure on the surface of the collecting shaft 44 of the collecting unit 40. . It can be understood that when the preparation device 100 includes the two positioning elements 60, the linear structure should pass through the positioning holes 62 of the two positioning elements 60 in turn, and then wrap around the surface of the collecting shaft 44. .

The step S30 includes the following sub-steps: S31 provides at least one carbon nanotube array, each of the carbon nanotube arrays is grown on a substrate; S32 fixes the substrate with the carbon nanotube array grown to the cladding unit a disk 36 of 30; and S33 respectively, using a stretching tool to respectively pull a carbon nanotube film or a non-twisted nano carbon line from the array of at least one carbon nanotube, and the carbon nanotube A film or non-twisted nanocarbon line adheres to the wire structure.

Wherein, the carbon nanotube array in step S31 is preferably a super-sequential carbon nanotube array. The method for preparing the super-sequential carbon nanotube array adopts a chemical vapor deposition method, and the specific steps thereof comprise: providing a flat substrate, the substrate may be selected from a P-type or N-type germanium substrate, or a germanium substrate formed with an oxide layer may be selected. Preferably, the present embodiment adopts a 4-inch germanium substrate; a catalyst layer is uniformly formed on the surface of the substrate, and the catalyst layer material may be one of alloys of iron (Fe), cobalt (Co), nickel (Ni) or any combination thereof. The substrate formed with the catalyst layer is annealed in air at 700 ° C to 900 ° C for about 30 minutes to 90 minutes; the treated substrate is placed in a reaction furnace and added in a protective gas atmosphere. Heat to 500 ° C ~ 740 ° C, and then into the carbon source gas reaction for about 5 to 30 minutes, growth to obtain a super-sequential carbon nanotube array, the height of 50 microns ~ 5 mm. The super-sequential carbon nanotube array is a pure carbon nanotube array formed by a plurality of carbon nanotubes that are parallel to each other and perpendicular to the substrate. By controlling the growth conditions as described above, the super-sequential carbon nanotube array contains substantially no impurities such as amorphous carbon or residual catalyst metal particles. The carbon nanotubes in the array of carbon nanotubes are in an array formed by intimate contact with van der Waals. The carbon nanotube array is substantially the same area as the above substrate. In this embodiment, the carbon source gas may be a chemically active hydrocarbon such as acetylene, ethylene or methane. The preferred carbon source gas in this embodiment is acetylene; the shielding gas is nitrogen or an inert gas, and the preferred shielding gas in this embodiment. It is argon.

Step S32 fixes the substrate of the at least one carbon nanotube array to the plurality of support tables 362 of the disk 36 by adhesive, mechanical or vacuum adsorption. Wherein, one carbon nanotube array can be fixed on each support table 362.

Step S33 uses the stretching tool to sequentially pull a carbon nanotube film or a non-twisted nano carbon line from each carbon nanotube array, and rely on the carbon nanotube film or non-twisted nano carbon. The viscosity of the line adheres the carbon nanotube film or the non-twisted nanocarbon line to the surface of the wire structure.

Wherein, a stretching tool is used to extract a carbon nanotube film or a non-twisted nano carbon line from an array of carbon nanotubes. The method comprises the steps of: selecting a portion of the carbon nanotubes from the array of carbon nanotubes; stretching the portion of the carbon nanotubes at a certain speed along a growth direction substantially perpendicular to the array of the carbon nanotubes to form a continuous nep Carbon tube film. During the stretching process, the portion of the carbon nanotubes gradually disengage from the substrate in the stretching direction under the tensile force, and the selected partial carbon nanotubes are respectively in the array of carbon nanotubes due to the effect of the van der Waals force. The other carbon nanotubes are continuously connected end to end. Pull out to form a carbon nanotube film or a non-twisted nano carbon line. The stretching tool can be a tweezers, a ruler or an adhesive tape.

Wherein, in the step S32 and the step S33, the shielding member 38 is in an open state, so that the face plate 36 is exposed to the surrounding environment.

Step S40 is: when the collecting unit 40 and the covering unit 30 are activated, the feeding unit 20 continuously supplies the linear structure, and the linear structure continuously flows from the feeding unit 20 under the action of the collecting unit 40. Extracting and moving toward the collecting unit 40 while driving the carbon nanotube structure to continuously pull out from the at least one carbon nanotube array, while the driving mechanism 32 drives the hollow rotating shaft 34 to surround the The central axis 344 of the hollow rotating shaft 34 rotates. The rotation of the hollow rotating shaft 34 drives the disk 36 and the at least one carbon nanotube array disposed on the disk 36 to rotate around the central axis 344 of the hollow rotating shaft 34, and also from each carbon nanotube array. The carbon nanotube film stretched out is spirally wound around the surface of the linear structure to form the carbon nanotube composite linear structure. The collecting shaft 44 is automatically driven by the second motor 42 of the collecting unit 40 to wind the carbon nanotube composite linear structure on the collecting shaft 44. Therefore, the carbon nanotube composite linear structure will be continuously prepared and automatically collected. Before the step S40 is performed, especially before the covering unit 30 is opened, it is preferable to ensure that the shielding member 38 is in a closed state, and the flower disk 36 is accommodated in the shielding member 38.

In addition, when the rotational speed of the disk 36 is constant, the greater the rotational speed of the collecting shaft 44, the greater the pulling speed of the collecting shaft 44 to the linear structure, the linear structure The greater the moving speed, the thinner the thickness of the carbon nanotube layer in the carbon nanotube composite wire structure; the smaller the rotational speed of the collecting shaft 44, the collecting shaft 44 is The traction speed of the linear structure is smaller, the linear knot The smaller the moving speed of the structure, the thicker the thickness of the carbon nanotube layer. When the rotational speed of the collecting shaft 44 is constant, the rotation speed of the disk 36 is larger, and the speed at which the carbon nanotube structure is wound around the linear structure is faster, then the nanometer is The thicker the thickness of the carbon tube layer; the smaller the rotational speed of the disk 36, the slower the speed at which the carbon nanotube structure is wound around the linear structure, then the carbon nanotube layer The thinner the thickness. It can be seen that the rotational speed of the collecting shaft 44 and the rotational speed of the disk 36 jointly affect the thickness of the carbon nanotube layer in the carbon nanotube composite linear structure; that is, by controlling the second motor 42. The operating speed and the operating speed of the first motor 328 can control the thickness of the carbon nanotube layer.

Therefore, the preparation device 100 can realize continuous production of a carbon nanotube composite linear structure, which is advantageous for industrial application.

Hereinafter, the present invention will be described by taking a carbon nanotube composite wire structure as an example.

Referring to FIG. 2 and FIG. 3, an embodiment of the present invention provides a carbon nanotube composite linear structure 10. The carbon nanotube composite linear structure 10 has a diameter of about 40 μm and is composed of a gold wire 12 having a diameter of about 18 μm and a carbon nanotube layer 14 surrounding the gold wire 12, the carbon nanotube layer 14 is composed of a plurality of carbon nanotubes 142. The plurality of carbon nanotubes 142 are closely and evenly distributed on the surface of the gold wire 12. Wherein, the carbon nanotube composite linear structure 10 is formed by spirally winding a six carbon nanotube film on the surface of the gold wire 12 along the axial direction of the gold wire 12. Most of the carbon nanotubes 142 in the plurality of carbon nanotubes 142 are spirally wound around the surface of the gold wire 12 along the axial direction of the gold wire 12, and the majority of the carbon nanotubes 142 are oriented in the direction in which they extend. Adjacent carbon nanotubes 142 are connected end to end by van der Waals force. Further, the extending direction of the majority of the carbon nanotubes 142 and the extending direction of the adjacent carbon nanotubes 142 in the extending direction thereof extend helically along the gold wire 12. The extending direction of each of the carbon nanotubes 142 in the majority of the carbon nanotubes 142 is opposite to the gold The cross angle formed by the axial direction of the wire 12 is greater than 0° and less than 90°. Further, the carbon nanotubes 142 having substantially the same extending direction have substantially the same crossing angle with the axial direction of the gold wire 12. The carbon nanotube composite linear structure 10 having a diameter of about 40 μm has better mechanical properties and toughness, and the elongation of the carbon nanotube composite linear structure 10 having a diameter of about 40 μm can be The 5% of the gold wire 12 having a diameter of about 18 microns is increased to 10%. Wherein, the "elongation amount" generally refers to the difference between the length after stretching of the carbon nanotube composite linear structure 10 and the tensile force under the action of the tensile force.

Referring to FIG. 7 , an embodiment of the present invention provides a method for preparing the above-described carbon nanotube composite linear structure 10 , and the preparation method 100 can be used in the preparation method. The method of assembling the carbon nanotube composite linear structure 10 comprises the steps of: a, providing a gold wire 12 and a carbon nanotube structure; b, winding the carbon nanotube structure on the surface of the gold wire 12 . The gold wire 12 in the step a can be provided by the supply unit 20. The carbon nanotube structure can be provided by the coating unit 30. Step b can be achieved by activating the preparation device 100.

Specifically, the method for preparing the carbon nanotube composite linear structure 10 includes the following steps: W10 provides a gold wire 12 by the supply unit 20; W20 passes the gold wire 12 through the coating unit 30. The hollow rotating shaft 34 is fixed to the collecting unit 40; W30 provides six carbon nanotube film 15 by the covering unit 30, and adheres the six carbon nanotube film 15 to the gold wire 12 And the drive mechanism 32 of the W40 controlling the wrapping unit 30 rotates the faceplate 36 while controlling the collecting unit 40 to pull the gold wire 12 to make a linear motion, so that the six nanocarbons The tubular film 15 is spirally wound around the gold wire 12.

The step W10 is to provide a bobbin 16 around which the gold wire 12 is wound; the bobbin 16 is suspended from the guide shaft 24 of the supply unit 20, and the bobbin 16 is used by the two fixing rings 26. It is fixed to the guide shaft 24.

The step W20 is to extract a length of the gold wire 12 from the bobbin 16, and the gold wire 12 is sequentially passed through the positioning hole 62 of the positioning component 60 and the hollow rotating shaft 34; then the gold wire 12 is Winding on the collecting shaft 44.

The step W30 is to provide six super-sequential carbon nanotube arrays 18 grown on the substrate; the shielding member 38 is opened, and the six substrates on which the super-aligned carbon nanotube arrays 18 are grown are respectively a surface adhesive is fixed to the support table 362 of the face plate 36; then, the carbon nanotube film 15 is sequentially pulled out from the six super-aligned carbon nanotube arrays 18 by a tape, and each of the nano-tubes is The carbon nanotube film 15 is adhered to the surface of the gold wire 12; next, the shielding member 38 is closed such that the face plate 36 is contained in the receiving cavity 382 of the shielding member 38.

In step W40, the second motor 42 of the collecting unit 40 and the first motor 328 of the driving mechanism 32 of the wrapping unit 30 are activated, and the second motor 42 drives the collecting shaft 44 around the collecting shaft 44. The central shaft 442 is rotated clockwise, at which time the gold wire 12 is continuously pulled from the bobbin 16 and moved toward the collecting shaft 44, and six carbon nanotube films 15 are continuously from the six super smooth The row of carbon nanotubes 18 is pulled out. At the same time, the first motor 328 drives the transmission mechanism 320 to operate. The transmission mechanism 320 rotates the hollow rotating shaft 34 about its central axis 344 to drive the disk 36 to rotate. The rotation of the faceplate 36 causes the six super-aligned carbon nanotube arrays 18 and the carbon nanotube film 15 pulled from the six carbon nanotube arrays 18 to follow the disk 36 in rotation. Due to the direction of rotation of the six carbon nanotube film 15 and the gold wire 12 The direction of motion is vertical, so the six carbon nanotube film 15 is spirally wound around the surface of the gold wire 12, thereby forming the carbon nanotube composite linear structure 10. Due to the rotation of the collecting shaft 44, the carbon nanotube composite linear structure 10 is wound around the collecting shaft 44. As the collecting unit 40 and the covering unit 30 move, the gold wire 12 is continuously pulled out, and the carbon nanotube film 15 is continuously pulled out from the carbon nanotube array 18 and entangled in the moving motion. On the gold wire 12, an automatic generation of the carbon nanotube composite wire structure 10 is realized.

It can be understood that the carbon nanotube composite linear structure provided by the present invention can also be a carbon nanotube aluminum wire composite structure having a diameter of about 50 μm, and the carbon nanotube aluminum wire composite structure is composed of an aluminum having a diameter of about 25 μm. The wire is composed of a plurality of carbon nanotubes spirally arranged along the length of the aluminum wire.

The carbon nanotube composite linear structure provided by the embodiment of the invention, the preparation device thereof and the preparation method thereof have the following advantages: First, since the carbon nanotube has good mechanical properties and toughness, and has the ability to enhance and recombine The effect of the properties of the material, so that the carbon nanotubes in the carbon nanotube composite linear structure are evenly distributed on the surface of the electrically conductive linear structure, so that the carbon nanotube composite linear structure 10 has better Mechanical properties and toughness. For example, the amount of elongation can be increased from 5% of the elongation of the electrically conductive linear structure to 10%. Therefore, the carbon nanotube composite wire structure provided by the present invention has a wide range of applications, such as being usable in a cable, as a wire or the like. Secondly, the carbon nanotube composite linear structure provided by the embodiment of the present invention is prepared by winding a carbon nanotube structure on the surface of the conductive linear structure, so that the preparation method is relatively simple and easy to implement. Thirdly, the preparation device provided by the embodiment of the present invention may enable the linear structure to be fixed to the collection unit through the coating unit, and the disk in the coating unit may be rotated, so that the arrangement is Carbon nanotube array on the faceplate It is also rotatable such that the carbon nanotube structure obtained from the carbon nanotube array can be automatically wound on the linear structure; in addition, the collecting unit can automatically pull the linear structure and wrap the naphthalene The carbon nanotubes are combined with a linear structure. Therefore, the apparatus for preparing a nano carbon tube composite linear structure can realize automatic preparation and collection of a carbon nanotube composite linear structure, so that the carbon nanotube composite linear structure The preparation is relatively simple, and continuous production can be realized, which is advantageous for industrial applications.

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.

10‧‧‧Nano Carbon Tube Composite Wire Structure

12‧‧‧Gold silk

14‧‧‧Nano carbon tube layer

142‧‧‧Nano Carbon Tube

Claims (16)

A carbon nanotube composite linear structure, the improvement comprising: a conductive linear structure and a carbon nanotube layer disposed around the conductive linear structure, the carbon nanotube layer being a continuous layered structure, And composed of a plurality of carbon nanotubes, the plurality of carbon nanotubes are closely connected by van der Waals force. The carbon nanotube composite linear structure according to Item 1, wherein the plurality of carbon nanotubes are uniformly distributed around the conductive linear structure along the conductive linear structure. The carbon nanotube composite linear structure according to Item 1, wherein the material of the electrically conductive linear structure is a metal, and the metal comprises an elemental metal or an alloy. The carbon nanotube composite linear structure according to Item 1, wherein the conductive linear structure is a composite linear structure having a metal layer. The carbon nanotube composite linear structure according to claim 1, wherein a majority of the carbon nanotubes in the carbon nanotube layer are disposed around the conductive line along the axial direction of the conductive linear structure. The surface of the linear structure. The carbon nanotube composite linear structure of claim 5, wherein a majority of the carbon nanotubes in the carbon nanotube layer extend substantially helically along an axial direction of the electrically conductive linear structure. The carbon nanotube composite wire structure according to Item 6, wherein the majority of the carbon nanotubes are connected end to end with a van der Waals force by adjacent carbon nanotubes in the extending direction. The carbon nanotube composite linear structure according to Item 6, wherein the extending direction of each of the carbon nanotubes in the majority of the carbon nanotubes and the conductive linear junction The axial direction of the structure forms a crossing angle α, 0° < α ≦ 90°. The carbon nanotube composite linear structure according to Item 1, wherein the majority of the carbon nanotubes in the carbon nanotube layer form a network and surround the surface of the conductive linear structure. . A nano carbon tube composite linear structure, the improvement comprising: a conductive linear structure and a carbon nanotube structure, the carbon nanotube structure is a self-supporting structure, and is wrapped around the conductive line The entire surface of the structure. The carbon nanotube composite linear structure according to claim 10, wherein the carbon nanotube structure is spirally wrapped around a surface of the electrically conductive linear structure along an axial direction of the electrically conductive linear structure. The carbon nanotube composite linear structure of claim 10, wherein the carbon nanotube structure is at least one carbon nanotube membrane, at least one nanocarbon pipeline, or a combination thereof. A method for preparing a carbon nanotube composite linear structure, comprising the steps of: providing a conductive linear structure and a carbon nanotube structure, wherein the carbon nanotube structure is a self-supporting structure and is composed of a carbon nanotube, The plurality of carbon nanotubes are closely connected by van der Waals; and winding the carbon nanotube structure on the surface of the electrically conductive linear structure, so that the carbon nanotube structure covers the entire conductive linear structure surface. The method for preparing a carbon nanotube composite linear structure according to claim 13, wherein the step of providing a carbon nanotube structure is: providing at least one carbon nanotube array, and using a stretching tool A carbon nanotube membrane or a non-twisted nanocarbon line is drawn from each array of carbon nanotubes. The method for preparing a carbon nanotube composite linear structure according to Item 13, wherein the method of winding the carbon nanotube structure on the surface of the conductive linear structure is The method includes the steps of: adhering the carbon nanotube structure to the conductive linear structure, rotating the conductive linear structure, and controlling the conductive linear structure to linearly move or control the carbon nanotube structure to make a straight line Moving, the carbon nanotube structure is wound around the surface of the electrically conductive linear structure to form the carbon nanotube composite linear structure. The method for preparing a carbon nanotube composite linear structure according to claim 13, wherein the method of winding the carbon nanotube structure on a surface of the conductive linear structure comprises the step of: The carbon nanotube structure is adhered to the electrically conductive linear structure, and the carbon nanotube structure is rotated around the electrically conductive linear structure, and the electrically conductive linear structure is controlled to linearly move along the axial direction thereof or to control the carbon nanotube The structure is linearly moved along the axial direction of the electrically conductive linear structure, and the carbon nanotube structure is wound around the surface of the electrically conductive linear structure to form the carbon nanotube composite linear structure.