CN113141696A

CN113141696A - Method for removing static electricity

Info

Publication number: CN113141696A
Application number: CN202010066032.7A
Authority: CN
Inventors: 刘亮
Original assignee: Beijing Funate Innovation Technology Co Ltd
Current assignee: Beijing Funate Innovation Technology Co Ltd
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2021-07-20

Abstract

The invention relates to a static electricity removing method, which comprises the following steps: providing a static electricity removing device, wherein the static electricity removing device comprises a carbon nano tube structure and a substrate, and the carbon nano tube structure is arranged on the substrate and is electrically connected with the object with static electricity; and (c) placing the static removing device close to the object to be electrostatically charged, but not in contact with the object to be electrostatically charged.

Description

Method for removing static electricity

Technical Field

The invention relates to a static electricity removing technology, in particular to a static electricity removing device and method for polymer film products.

Background

Polymer film type products often generate static electricity during the production process. Static electricity can be harmful to equipment and personnel, and the polymer film is generally subjected to static electricity removal treatment before leaving the factory.

There are various methods for eliminating static electricity, such as:

(1) anti-static grounding

Antistatic grounding is a common method for eliminating static electricity, and excess charges are conducted away through a conducting wire. So that the charge is no longer concentrated. The defect of antistatic grounding is that the contact needs to be conductive, and the effect of electrostatic grounding on a non-conductor is not good.

(2) Static eliminator

The static eliminator generates a certain value of high voltage by the high voltage power generator and applies the high voltage to the discharge needle, and positive ions and negative static electricity are neutralized, so that the purposes of eliminating static electricity and preventing static electricity are achieved. The static eliminator has better static eliminating effect. However, because high voltage is required to generate static electricity, there is a certain danger if people come into direct contact with the static electricity during use.

(3) Antistatic carbon brush

The antistatic carbon brush is made of conductive fibers, and is usually graphite. Firstly, static electricity is removed by adopting a conduction principle, so that an external power supply is not needed, and the safety, energy conservation and environmental protection are ensured; and secondly, as the antistatic carbon brush is required to be contacted with a product, the blank of static elimination of a solid non-conductor which cannot be treated by antistatic grounding is solved, and static on the surface of a polymer film can be effectively removed by contacting the product.

However, the antistatic carbon brush also has some disadvantages, resulting in its limited use condition. For example, the fibers of the carbon brush may abrade or contaminate the surface of the material.

Disclosure of Invention

In view of the above, there is a need for a simple method for removing static electricity effectively without damaging the polymer film product.

A method of destaticizing comprising the steps of:

providing a static electricity removing device, wherein the static electricity removing device comprises a carbon nano tube structure and a substrate, the carbon nano tube structure is arranged on the substrate, and the carbon nano tube structure is electrically connected with the substrate;

bringing the static discharge apparatus close to the electrostatically charged object, but not in contact with the electrostatically charged object.

A method of destaticizing comprising the steps of:

providing a static electricity removing device, wherein the static electricity removing device comprises a conductive structure and a substrate, and the conductive structure is arranged on the substrate and is electrically connected with the conductive structure;

and enabling the static removing device to be close to the object with static electricity, wherein the conducting structure is not in contact with the object with static electricity, and the conducting structure is one of a non-carbon nano tube nano linear structure or a two-dimensional nano structure.

Compared with the prior art, the static electricity removing method provided by the invention has the following advantages: the static electricity removing device comprises a carbon nano tube structure, and the carbon nano tube structure can effectively weaken or remove static electricity without contacting the polymer film, so that the polymer film is not polluted or damaged.

Drawings

Fig. 1 is a schematic structural diagram of a static electricity removing device according to a first embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of the static discharge apparatus shown in fig. 1 taken along line II-II.

Fig. 3 is a scanning electron micrograph of a drawn carbon nanotube film according to a first embodiment of the present invention.

Fig. 4 is a scanning electron micrograph of a carbon nanotube rolled film according to the first embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a carbon nanotube horizontal array film according to a first embodiment of the present invention.

Fig. 6 is a scanning electron micrograph of a non-twisted carbon nanotube wire according to the first embodiment of the present invention.

Fig. 7 is a scanning electron micrograph of a twisted carbon nanotube wire used in the first embodiment of the present invention.

Fig. 8 is a scanning electron micrograph of a long carbon nanotube wire according to an eighth embodiment of the present invention.

Fig. 9 is a schematic diagram of a carbon nanotube composite structure according to a first embodiment of the present invention.

Fig. 10 is a schematic structural view of a static discharge apparatus according to a second embodiment of the present invention.

Fig. 11 is a schematic structural diagram of a static discharge apparatus according to a third embodiment of the present invention.

Fig. 12 is a schematic cross-sectional view of the electrostatic precipitator line XII-XII shown in fig. 11.

Fig. 13 is a schematic structural diagram of a static discharge apparatus according to a fourth embodiment of the present invention.

FIG. 14 is a schematic cross-sectional view of the static discharge apparatus shown in FIG. 13 taken along line XIV-XIV.

Fig. 15 is a schematic structural view of a static discharge apparatus according to a fifth embodiment of the present invention.

Fig. 16 is a flowchart of a method for removing static electricity according to a sixth embodiment of the invention.

Fig. 17 is a flowchart of a method for removing static electricity according to a seventh embodiment of the invention.

Fig. 18 is a schematic structural view of a polymer film production system according to an eighth embodiment of the present invention.

FIG. 19 is a schematic structural view of a polymer film manufacturing system according to a ninth embodiment of the present invention

Description of the main elements

Static

electricity eliminating device

10, 20, 30, 40, 50

Substrate

12, 32

Carbon nanotube structures

11, 21, 31, 41, 51

Carbon nanotube burr 511

Pure carbon nanostructures 110

Carbon nanotube composite structure 112

Functional dielectric layer 114

Fixed

end

116, 216

Free ends

118, 218

Electrostatically charged object 14

Ground wire 15

Polymer

film manufacturing systems

100, 200

Unreeling roller 1001

A rolling roller 1002

Detailed Description

The invention will be described in further detail with reference to the following drawings and specific embodiments.

Referring to fig. 1 to 2, a static discharge apparatus 10 according to a first embodiment of the present invention includes a carbon nanotube structure 11 and a substrate 12, wherein the carbon nanotube structure 11 is disposed on the substrate 12 and electrically connected to the substrate 12. In one embodiment of the present invention, the carbon nanotube structure 11 is in direct contact with the outer surface of the substrate 12.

The substrate 12 is used to support the carbon nanotube structure 11 and/or conduct away charges. The substrate 12 is a conductive substrate. The substrate 12 may be a rigid substrate 12 or a flexible substrate 12. The material of the hard substrate 12 may be a metal material, a carbon material, or the like. The material of the flexible substrate 12 may be a conductive polymer material. The thickness and shape of the substrate 12 may be designed as desired. The shape of the substrate 12 may be a cylindrical shape, a rectangular parallelepiped structure, or the like. In one embodiment of the present invention, the substrate 12 is a metal cylinder.

The carbon nanotube structure 11 may be a pure carbon nanotube structure 110 or a carbon nanotube composite structure 112. The carbon nanotube structure 11 is coated on the outer surface of the substrate 12. Specifically, the carbon nanotube structure 11 is at least partially fixed to the outer surface of the substrate 12, and the portion of the carbon nanotube structure 11 fixed to the substrate 12 is referred to as a fixed end 116. The remaining portion of the carbon nanotube structure 11 that is not fixed to the outer surface of the substrate 12 is referred to as a free end 118. The free end 118 is movable under the influence of an external force. For example, when approaching a charged object, the free end 118 may be attracted and directed toward the charged object due to electrostatic attraction. The fixed end 116 may be any portion of the carbon nanotube structure 11 as long as it can be fixed on the outer surface of the substrate 12. The fixed end 116 may be fixed at any position on the outer surface of the substrate 12. The area of the fixed end 116 covering the outer surface of the substrate 12 is not limited, and can be selected according to the requirement.

The length of the free end 118 may be selected as desired. The length of the free end 118 is greater than 1 cm if the carbon nanotube structure 11 is to be in contact with a charged object during the removal of static electricity. In one embodiment, the free end 118 is greater than 5 centimeters in length. In another embodiment, the free end 118 is greater than 8 centimeters in length. Even if the charged object fluctuates during the static electricity removal process, the length of the free end 118 is relatively long, so that the carbon nanotube structure 11 can well contact the charged object along with the fluctuation of the charged object.

If the carbon nanotube structure 11 is not to be in contact with a charged object during the removal of static electricity, the length of the free end 118 is less than or equal to 1 cm in one embodiment. Due to the small length of the free end 118, the carbon nanotube structure 11 can be prevented from contacting the charged object, and rubbing against the carbon nanotube structure 11 can be prevented.

The pure carbon nanotube structure 110 includes uniformly distributed carbon nanotubes, and the carbon nanotubes are tightly bonded by van der waals force, so that the carbon nanotube structure 11 forms a self-supporting structure. By self-supporting structure is meant that the structure can maintain a particular membrane-like structure without the need for a support. Therefore, the pure carbon nanotube structure 110 is self-supporting and can be partially suspended. The plurality of carbon nanotubes are preferentially aligned in substantially the same direction. By preferentially orienting, it is meant that a majority of the carbon nanotubes in the carbon nanotube film have a greater probability of orienting in a certain direction, i.e., the axes of the majority of the carbon nanotubes in the carbon nanotube film extend in substantially the same direction. The plurality of carbon nanotubes are substantially parallel to each other and perpendicular to the substrate 12. The pure carbon nanotube structure 110 includes at least one carbon nanotube film, at least one carbon nanotube wire, at least one carbon nanotube array, or a combination thereof. The carbon nanotube film may be a carbon nanotube drawn film, a carbon nanotube rolled film, a carbon nanotube horizontal array film, or a combination thereof. The carbon nanotube wire may be a carbon nanotube wire, or a combination thereof.

The carbon nanotubes include one or more of single-walled carbon nanotubes, double-walled carbon nanotubes, and multi-walled carbon nanotubes. The carbon nanotubes are parallel to the surface of the pure carbon nanotube structure 110. The diameter of the single-walled carbon nanotube is 0.5 to 10 nanometers, the diameter of the double-walled carbon nanotube is 1.0 to 15 nanometers, and the diameter of the multi-walled carbon nanotube is 1.5 to 500 nanometers. The length of the carbon nano tube is more than 1 micron. In one embodiment, the carbon nanotubes have a length of 50 microns to 1000 microns. In the embodiment of the invention, the carbon nano tube is a multi-wall carbon nano tube.

The carbon nanotube film includes a plurality of uniformly distributed carbon nanotubes. The carbon nanotubes in the carbon nanotube film extend along one direction, the carbon nanotubes form a plurality of carbon nanotube bundles, and the extending direction of the carbon nanotubes is parallel to the surface of the carbon nanotube film. Specifically, the carbon nanotube film may include a drawn carbon nanotube film or a rolled carbon nanotube film. The carbon nanotube wire may be a non-twisted carbon nanotube wire or a twisted carbon nanotube wire. Referring to fig. 3, in particular, the drawn carbon nanotube film includes a plurality of bundles of carbon nanotubes arranged in a continuous and aligned manner. The plurality of carbon nanotube bundles are connected end-to-end by van der waals forces. Each carbon nanotube bundle includes a plurality of mutually parallel carbon nanotubes that are tightly bound by van der waals forces. The diameter of the carbon nanotube bundle is 10 nm to 200 nm, preferably, 10 nm to 100 nm. The carbon nano tubes in the carbon nano tube drawing film are arranged along the same direction in a preferred orientation mode. The carbon nanotube drawn film includes a plurality of openings. The opening is a through hole penetrating through the layered pure carbon nanotube structure 110 in the thickness direction. The opening is a gap. When the pure carbon nanotube structure 110 only includes a single-layer drawn carbon nanotube film, there is a gap between adjacent carbon nanotube segments in the drawn carbon nanotube film, wherein the size of the gap is 1 nm to 0.5 μm. It can be understood that, in the pure carbon nanotube structure 11 composed of the drawn films of the carbon nanotubes, the arrangement direction of the carbon nanotubes in two adjacent drawn films of the carbon nanotubes has an included angle α, and α is greater than 0 ° and less than or equal to 90 °, so that the carbon nanotubes in two adjacent drawn films of the carbon nanotubes are crossed with each other to form a net structure, and the net structure includes a plurality of pores, and the plurality of pores are uniformly and regularly distributed in the pure carbon nanotube structure 110, wherein the diameter of the pores is 1 nm-0.5 μm. The thickness of the carbon nano tube drawing film is 0.01-100 microns. In one embodiment of the present invention, a single-layer drawn carbon nanotube film is used, and the thickness of the single-layer drawn carbon nanotube film is about 0.04 μm. The carbon nanotube drawn film can be directly obtained by drawing a carbon nanotube array. Please refer to chinese patent No. CN101239712B, which is published on 5/26/2010 by dawn et al, CN101239712B, a structure of the drawn carbon nanotube film and a method for preparing the same, in 2007 and 2/9, applicant: qinghua university, hong Fujin precision industry (Shenzhen) limited. For the sake of brevity, this is incorporated herein by reference, and all technical disclosure of the above-mentioned applications should be considered as part of the technical disclosure of the present application.

The carbon nanotube rolling film comprises carbon nanotubes which are uniformly distributed, and the carbon nanotubes are preferentially arranged along the same direction. The carbon nanotubes in the carbon nanotube rolled film are partially overlapped with each other, and are mutually attracted and tightly combined through van der waals force, so that the pure carbon nanotube structure 110 has good flexibility and can be bent and folded into any shape without cracking. And the carbon nanotubes in the carbon nanotube rolling film are mutually attracted and tightly combined through Van der Waals force, so that the carbon nanotube rolling film is of a self-supporting structure. The carbon nanotube rolled film may be obtained by rolling a carbon nanotube array. The carbon nanotubes in the carbon nanotube rolled film form an included angle β with the surface of the growth substrate 12 forming the carbon nanotube array, where β is greater than or equal to 0 degree and less than or equal to 15 degrees (β is greater than or equal to 0 and less than or equal to 15 °), the included angle β is related to the pressure applied to the carbon nanotube array, the larger the pressure is, the smaller the included angle is, and preferably, the carbon nanotubes in the carbon nanotube rolled film are arranged parallel to the growth substrate 12.

The carbon nanotube rolling film is obtained by rolling a carbon nanotube array, and the carbon nanotubes in the carbon nanotube rolling film have different arrangement forms according to different rolling modes. Specifically, referring to fig. 4, when the carbon nanotubes are laminated in the same direction, the carbon nanotubes are preferentially aligned in a fixed direction. The length of the carbon nano tube in the carbon nano tube rolling film is more than 50 microns. The carbon nanotube rolled film and the method for preparing the same are disclosed in chinese patent application No. CN101314464A, which is applied on 6/1/2007 and published on 12/3/2008 of the applicant. For the sake of brevity, this is incorporated herein by reference, and all technical disclosure of the above-mentioned applications should be considered as part of the technical disclosure of the present application.

The area and the thickness of the carbon nano tube rolling film are not limited and can be selected according to actual needs. The area of the carbon nano tube rolling film is basically the same as the size of the carbon nano tube array. The thickness of the carbon nanotube rolling film is related to the height of the carbon nanotube array and the rolling pressure, and can be 1 micrometer to 1 millimeter. It can be understood that the larger the height of the carbon nanotube array and the smaller the applied pressure, the larger the thickness of the prepared carbon nanotube rolled film; conversely, the smaller the height of the carbon nanotube array and the larger the applied pressure, the smaller the thickness of the prepared carbon nanotube rolled film.

Referring to fig. 5, the carbon nanotube horizontal array film includes a plurality of ultra-long carbon nanotubes parallel to a surface of the carbon nanotube film, and the ultra-long carbon nanotubes are arranged parallel to each other. At least a portion of the ultralong carbon nanotubes include carbon nanotube tips. The length of the ultra-long carbon nano tube is more than 1 cm. The carbon nano tube film is thin due to electrostatic polymer film, is easy to fluctuate, is long and soft in film formed by the super-long carbon nano tube, can fluctuate along with the electrostatic polymer film, and cannot damage the polymer film even if contacting with the electrostatic polymer film.

For the structure and the preparation method of the carbon nanotube horizontal array film, please refer to the chinese patent No. CN101497436B "carbon nanotube thin film structure and the manufacturing method thereof" published on 6/3/2015, which is filed on 2/1/2008 by dawn et al, applicant: qinghua university, hong Fujin precision industry (Shenzhen) limited. For the sake of brevity, this is incorporated herein by reference, and all technical disclosure of the above-mentioned applications should be considered as part of the technical disclosure of the present application.

In addition to the carbon nanotube film described above, two-dimensional nanostructures of other materials may be used to remove static electricity. The two-dimensional nanostructures are capable of emitting electrons. The material of the two-dimensional nanostructure can be graphene, molybdenum disulfide, tungsten diselenide or molybdenum diselenide and the like. The two-dimensional nanostructures are clamped to the substrate 12 by metal clips. Referring to fig. 6, the untwisted carbon nanotube wire comprises a plurality of carbon nanotubes arranged along the length of the untwisted carbon nanotube wire. Specifically, the untwisted carbon nanotube wire comprises a plurality of carbon nanotube segments, the plurality of carbon nanotube segments being connected end to end by van der waals forces, each of the carbon nanotube segments comprising a plurality of carbon nanotubes parallel to each other and tightly bound by van der waals forces. The carbon nanotube segments have any length, thickness, uniformity, and shape. The length of the untwisted carbon nanotube wire is not limited, and the diameter of the untwisted carbon nanotube wire is 0.5 nanometer to 100 micrometers. The untwisted carbon nanotube wire is obtained by processing a carbon nanotube film by an organic solvent. Specifically, an organic solvent is infiltrated into the whole surface of the carbon nanotube drawn film, and under the action of surface tension generated when the volatile organic solvent is volatilized, a plurality of carbon nanotubes which are parallel to each other in the carbon nanotube drawn film are tightly combined through van der waals force, so that the carbon nanotube drawn film is shrunk into a non-twisted carbon nanotube wire. The organic solvent is a volatile organic solvent, such as ethanol, methanol, acetone, dichloroethane or chloroform, in this embodiment ethanol is used. The carbon nanotube film treated with the organic solvent has a reduced specific surface area and a reduced viscosity compared to a carbon nanotube film not treated with the organic solvent.

The twisted carbon nanotube wire is obtained by twisting the two ends of the carbon nanotube film in opposite directions by using a mechanical force. Referring to fig. 7, the twisted carbon nanotube wire includes a plurality of carbon nanotubes spirally arranged around the axis of the twisted carbon nanotube wire. Specifically, the twisted carbon nanotube wire includes a plurality of carbon nanotube segments connected end to end by van der waals force, each of the carbon nanotube segments including a plurality of carbon nanotubes parallel to each other and tightly bound by van der waals force. The carbon nanotube segments have any length, thickness, uniformity, and shape. The length of the twisted carbon nano tube line is not limited, and the diameter is 0.5 nanometer to 100 micrometers. Further, the twisted carbon nanotube wire may be treated with a volatile organic solvent. Under the action of surface tension generated when the volatile organic solvent is volatilized, adjacent carbon nanotubes in the processed twisted carbon nanotube wire are tightly combined through van der waals force, so that the specific surface area of the twisted carbon nanotube wire is reduced, and the density and the strength are increased.

Please refer to chinese patent No. CN100411979C, which is published on 8/20/2002 by dawn et al, "a carbon nanotube rope and a method for manufacturing the same", for the linear structure of the carbon nanotube and the method for manufacturing the same, in 2002: qinghua university, hong fu jin precision industry (shenzhen) limited, and chinese published patent application No. CN100500556C published on 6.17.2009, which was applied on 12.16.2005 and 6.2009, the applicant: qinghua university, hong Fujin precision industry (Shenzhen) limited. For the sake of brevity, this is incorporated herein by reference, and all technical disclosure of the above-mentioned applications should be considered as part of the technical disclosure of the present application.

The carbon nano tube long line is a bundle-shaped structure composed of a plurality of parallel carbon nano tube bundles connected end to end or a linear structure composed of a plurality of carbon nano tube bundles connected end to end, the adjacent carbon nano tube bundles are tightly combined through Van der Waals force, and the carbon nano tube bundle comprises a plurality of carbon nano tubes arranged in an oriented mode. Referring to fig. 8, the carbon nanotube long line includes a plurality of protruding carbon nanotube tips. The carbon nanotubes in the long carbon nanotube wires are single-walled, double-walled or multi-walled carbon nanotubes. The length of the carbon nanotube ranges from 10 to 1000 microns.

The plurality of protruding carbon nanotube tips are obtained by breaking a carbon nanotube strand or a carbon nanotube non-strand. The method for breaking the twisted carbon nanotube wire or the non-twisted carbon nanotube wire is a laser ablation fusing method. After the carbon nanotube twisted wire or the carbon nanotube non-twisted wire is broken, a plurality of protruding carbon nanotube tips are formed at the breaking point, and electrons can be emitted.

The carbon nanotubes in the long carbon nanotube wires are single-walled, double-walled or multi-walled carbon nanotubes. The carbon nanotube long line comprises a plurality of protruding carbon nanotube tips, so that the electric field shielding effect of the carbon nanotube long line can be effectively reduced, and discharge is generated under a lower electric field.

In addition to the carbon nanotube wire-like structures described above, non-carbon nanotube wire-like structures may be used to remove static electricity. The non-carbon nano tube nano linear structure comprises a plurality of nano wires which are uniformly arranged and extended along the same direction. The plurality of nanowires are parallel to each other. The non-carbon nanotube nanowires are capable of emitting electrons. The non-carbon nano-tube nano-wire can be a silicon nano-wire, a silicon dioxide nano-wire, a zinc oxide nano-wire, molybdenum disulfide or a graphene narrow band and the like. Referring to fig. 9, the carbon nanotube composite structure 112 includes a pure carbon nanotube structure 110 and a functional dielectric layer 114 compounded on the surface of the pure carbon nanotube structure 110, wherein the functional dielectric layer 114 is made of a conductive material. The functional dielectric layer pure carbon nanotube structure 110 is coated on the surfaces of the plurality of carbon nanotubes. Preferably, the functional medium layer pure carbon nanotube structure 110 is coated on the whole surface of each carbon nanotube. The carbon nanotubes are tightly connected by van der waals forces so that the carbon nanotube composite structure 112 forms a self-supporting structure. By self-supporting structure is meant that the structure can maintain a particular membrane-like structure without the need for a support. Thus, the carbon nanotube composite structure 112 is self-supporting and can be partially suspended.

The functional dielectric layer 114 has good conductivity and good wettability with the pure carbon nanotube structure 110. The material of the functional dielectric layer 114 may be at least one of Polyaniline (PANI), Polythiophene (PT), Polypyrrole (PPy), or other conductive polymers, or a metal material. It is to be understood that the material of the functional medium layer 114 is not limited to the above-listed materials as long as it has conductivity. The thickness of the functional dielectric layer 114 is not limited, and may be 1 nm to 150 nm.

Referring to fig. 10, a second embodiment of the invention provides a static discharge apparatus 20, where the static discharge apparatus 10 includes a carbon nanotube structure 21 and a substrate 12, and the carbon nanotube structure 11 is disposed on the substrate 12 and electrically connected to the substrate 12. The carbon nanotube structure 21 includes a plurality of carbon nanotube lines. The plurality of carbon nanotube wires are arranged side by side and spaced apart on the outer surface of the substrate 12. The plurality of carbon nanotube wires are parallel to each other. The carbon nanotube wire includes a fixed end 216 and a free end 218.

The carbon nanotube wire comprises a plurality of carbon nanotubes which are uniformly arranged, and the carbon nanotubes extend along the same direction in a preferred orientation. A plurality of carbon nanotube wires are clamped on the substrate 12 by a metal clamp, and the extending direction of the carbon nanotubes is perpendicular to the axial direction of the substrate 12.

Optionally, the static discharge device 20 may further include a ground line 15. The static discharge apparatus 20 according to the second embodiment of the present invention is substantially the same as the static discharge apparatus 10 according to the first embodiment of the present invention, except that the carbon nanotube structure 11 of the static discharge apparatus 20 according to the second embodiment of the present invention includes a plurality of carbon nanotube wires.

Referring to fig. 11 and 12, a static electricity removing device 30 according to a third embodiment of the present invention includes a carbon nanotube structure 31 and a substrate 32, wherein the carbon nanotube structure 31 is disposed on the substrate 32 and electrically connected to the substrate 32. The carbon nanotube structure 31 includes a carbon nanotube array.

The carbon nanotube array comprises a plurality of carbon nanotubes which are uniformly arranged and extended along the same direction. The plurality of carbon nanotubes are parallel to each other, and adjacent carbon nanotubes are connected by van der waals force. The substrate 32 is a rectangular parallelepiped substrate, and the material may be silicon, metal, conductive polymer, etc. The extending direction of the carbon nanotubes is perpendicular to the substrate 32.

The static discharge apparatus 30 according to the third embodiment of the present invention is substantially the same as the static discharge apparatus 10 according to the first embodiment of the present invention, except that the carbon nanotube structure 31 according to the third embodiment of the present invention includes a carbon nanotube array. The substrate 32 is a rectangular parallelepiped substrate, and the material may be silicon, metal, conductive polymer, etc. The extending direction of the carbon nanotubes is perpendicular to the substrate 32.

Referring to fig. 13 and 14, a static electricity removing device 40 according to a fourth embodiment of the present invention includes a carbon nanotube structure 41 and a substrate 32, wherein the carbon nanotube structure 41 is disposed on the substrate 32 and electrically connected to the substrate 32. The carbon nanotube structure 41 includes a plurality of carbon nanotube arrays. The plurality of carbon nanotube arrays are disposed at intervals on an outer surface of the substrate 32.

The static discharge apparatus 40 according to the fourth embodiment of the present invention is substantially the same as the static discharge apparatus 10 according to the first embodiment of the present invention, except that the carbon nanotube structure 41 of the static discharge apparatus 40 according to the fourth embodiment of the present invention includes a plurality of carbon nanotube arrays. The substrate 32 is a rectangular parallelepiped substrate, and the material may be silicon, metal, conductive polymer, etc. The extending direction of the carbon nanotubes is perpendicular to the substrate 32.

Referring to fig. 15, a fifth embodiment of the present invention provides a static discharge apparatus 50, where the static discharge apparatus 50 includes a carbon nanotube structure 51 and a substrate 32, and the carbon nanotube structure 51 is disposed on the substrate 32 and electrically connected to the substrate 32. The carbon nanotube structure 51 is coated on the outer surface of the substrate 32, and the surface of the carbon nanotube structure 51 away from the substrate 32 includes a plurality of carbon nanotube burrs 511.

The carbon nanotube structure can be at least one of a carbon nanotube drawn film, a carbon nanotube rolled film, carbon nanotube slurry and the like. The carbon nanotube slurry includes carbon nanotubes and a binder. The method for preparing the burrs of the carbon nanotubes on the surface of the carbon nanotube slurry comprises the following steps: applying a carbon nanotube slurry to an outer surface of the substrate 32; and rubbing the surface of the carbon nano tube slurry by using a rubber roller or a brush to form a plurality of carbon nano tube burrs on the surface of the carbon nano tube slurry.

The preparation method of the carbon nanotube drawn film with the surface comprising a plurality of carbon nanotube burrs can comprise the following steps: bonding the carbon nanotube drawn film to the surface of the substrate 12 through conductive silver adhesive; and lightly sweeping the surface of the carbon nanotube drawn film by using a brush, and repeatedly brushing for several times to form a plurality of carbon nanotube burrs on the surface of the carbon nanotube drawn film.

In use, the carbon nanotube structure 51 may or may not be in contact with the electrostatically charged object. When in contact, the carbon nanotube drawn film is very soft, and even if the carbon nanotube drawn film is in contact with the polymer film with static electricity, the surface of the film cannot be damaged, and the surface of the carbon nanotube drawn film comprises a plurality of carbon nanotube burrs, so that the static electricity can be better conducted away. When not in contact, the surface of the carbon nanotube structure 51 includes a plurality of carbon nanotube burrs 512. the plurality of carbon nanotube burrs 512 are able to discharge electricity, so static electricity can be removed, and since the carbon nanotube structure 51 is not in contact with an object with static electricity, the carbon nanotube structure 51 is not worn. Referring to fig. 16, a sixth embodiment of the present invention provides a method for removing static electricity by using the static electricity removing device provided in any of the above embodiments, taking the static electricity removing device 10 as an example, the method for removing static electricity includes the following steps:

s11: providing a static electricity eliminating device 10, wherein the static electricity eliminating device 10 comprises a carbon nanotube structure 11 and a substrate 12, and the carbon nanotube structure 11 is disposed on an outer surface of the substrate 12 and electrically connected to the substrate 12;

s12: the static discharge apparatus 10 is brought close to the electrostatically charged object 14, but is not in contact with the electrostatically charged object 14.

In step S11, the carbon nanotube structure 11 includes a drawn carbon nanotube film, and the substrate 12 is a metal cylinder. The carbon nano tube drawing film comprises a plurality of uniformly arranged carbon nano tubes, and the carbon nano tubes extend along the same direction in a preferred orientation mode. The drawn carbon nanotube film may be fixed on the substrate 12 by a clamping mechanism, or may be bonded to the substrate 12 by a conductive adhesive. The extending direction of the carbon nano tube is perpendicular to the axial direction of the metal cylinder.

In step S12, the electrostatic object 14 may be any electrostatic object 14, such as a polymer film-like structure or glass. The object 14 with static electricity is a polymer film structure, and specifically, the polymer film is made of polyvinyl chloride, polyethylene, polypropylene, polystyrene, polyethylene terephthalate or other resins. The polymer film is polyethylene terephthalate.

Bringing the static discharge apparatus 10 close to the electrostatically charged object 14 means that the carbon nanotube structure 11 is close to the electrostatically charged object 14, but the carbon nanotube structure 11 is not in contact with the electrostatically charged object 14. Since the object 14 with static electricity is charged with static electricity, and the carbon nanotube structure 11 is very flexible, light and thin, when the carbon nanotube structure 11 is close to the object 14 with static electricity, the tips of the carbon nanotubes on the surface of the carbon nanotube structure 11 will automatically point to the object 14 with static electricity due to the static electricity. The distance between the carbon nanotube tip and the electrostatically charged object 14 may be several millimeters to several centimeters, for example, 0.1 millimeter to 6 millimeters, 6 millimeters to 2 centimeters, 2 centimeters to 6 centimeters, or 6 centimeters to 10 centimeters. Specifically, depending on the kind of the electrostatically charged object, if the electrostatically charged object 14 is a flexible plastic polymer film, since it fluctuates due to electrostatic interaction during the manufacturing process, the distance between the tip of the carbon nanotube and the electrostatically charged object 14 is 1 cm to 10 cm. If the electrostatically charged object 14 is a glass-like hard object, the distance between the carbon nanotube tip and the electrostatically charged object 14 is 0.1 mm to 10 cm.

Because the carbon nanotube structure 11 is not in contact with the object 14 with static electricity, the carbon nanotube structure 11 is not abraded, and the service life of the carbon nanotube structure 11 can be prolonged; and does not cause contamination and wear of the electrostatically charged object 14.

In addition, in the static eliminating method in the above embodiment, the static eliminating apparatus 10 used may further include a ground line 15 connected to the substrate 12. In order to prevent sparks from being generated during the static electricity removal, the resistance of the substrate 12 is relatively large, or a resistor (not shown) may be provided at the connection between the ground line 15 and the substrate 12.

The static discharge apparatus 10 of the present invention does not require the carbon nanotube structure 11 to be connected to a power source during use. When the electric quantity of the object 14 with static electricity is not very high, the grounding with a lead wire is not needed, and the electric charge in the object with static electricity can be effectively lightened. In one embodiment, the electrostatic object 14 is charged polyethylene terephthalate (PET), the initial voltage of the PET is 1000V, after the electrostatic discharge device 10 approaches, the distance between the electrostatic discharge device 10 and the electrostatic object 14 is 2 cm, and the voltage of the electrostatic object becomes about 100V. Thus, the device is simple, safe and effective.

Referring to fig. 17, a seventh embodiment of the present invention provides a method for removing static electricity by using the static electricity removing device provided in any of the above embodiments, taking the static electricity removing device 10 as an example, the method for removing static electricity includes the following steps:

s12: the static removing device 10 is brought close to an electrostatically charged object 14 and the carbon nanotube structure 11 is brought into contact with the electrostatically charged object 14.

The method of removing static electricity according to the seventh embodiment of the present invention is substantially the same as the method of removing static electricity according to the sixth embodiment of the present invention, except that the carbon nanotube structure 11 is in contact with the object 14 to be electrostatically charged.

Referring to fig. 18, an eighth embodiment of the present invention provides a polymer film manufacturing system 100, wherein the polymer film manufacturing system 100 includes an unwinding roller 1001, a winding roller 1002 and a static discharge apparatus 10. The static electricity removing device 10 comprises a carbon nanotube structure 11 and a substrate 12, wherein the carbon nanotube structure 11 is disposed on the substrate 12 and electrically connected to the substrate 12, and the carbon nanotube structure 11 is disposed on one side of a polymer film path between the unwinding roller 1001 and the winding roller 1002. The carbon nanotube structure 11 is in contact with the polymer film.

The static removing apparatus in the polymer film manufacturing system 100 according to the present invention may be any one of the static removing apparatuses described above. The static eliminating device 10 can be arranged above the surfaces of the unwinding roller 1001 and the winding roller 1002 of the polymer film or below the surfaces of the unwinding roller 1001 and the winding roller 1002 of the polymer film, and can be arranged as required. Generally, static electricity is generated on the side where the film is contacted with and separated from the roll, so in one embodiment of the present invention, the static electricity removing device 10 is disposed below the surface of the polymer film near the unwinding roll 1001 and the winding roll 1002.

Referring to fig. 19, a ninth embodiment of the present invention provides a polymer film manufacturing system 200, wherein the polymer film manufacturing system 200 includes an unwinding roller 1001, a winding roller 1002 and a static discharge device 10. The static electricity removing device 10 comprises a carbon nanotube structure 11 and a substrate 12, wherein the carbon nanotube structure 11 is disposed on the substrate 12 and electrically connected to the substrate 12, and the carbon nanotube structure 11 is disposed on one side of a polymer film path between the unwinding roller 1001 and the winding roller 1002. The carbon nanotube structure 11 is not in contact with the polymer thin film.

The ninth embodiment of the present invention provides a polymer thin film manufacturing system 200 that is substantially the same as the polymer thin film manufacturing system 100 provided in the eighth embodiment of the present invention, except that the carbon nanotube structure 11 is not in contact with the polymer thin film in the polymer thin film manufacturing system 200 provided in the ninth embodiment of the present invention.

In addition, other modifications within the spirit of the invention may occur to those skilled in the art, and such modifications within the spirit of the invention are intended to be included within the scope of the invention as claimed.

Claims

1. A method of destaticizing comprising the steps of:

providing a static electricity removing device, wherein the static electricity removing device comprises a carbon nano tube structure and a substrate, and the carbon nano tube structure is arranged on the substrate and is electrically connected with the substrate; and

2. The method of claim 1, wherein the carbon nanotube structure comprises at least one carbon nanotube film comprising a plurality of carbon nanotubes aligned in a preferred orientation end-to-end.

3. The method according to claim 1, wherein the carbon nanotube structure comprises at least one carbon nanotube film, the carbon nanotube film comprises a plurality of carbon nanotubes aligned in an orderly manner along a fixed direction or different directions, and the carbon nanotubes in the carbon nanotube layer are partially overlapped.

4. The method of claim 1, wherein the carbon nanotube structure comprises at least one carbon nanotube wire, and the carbon nanotube wire comprises a plurality of carbon nanotubes aligned along an axial direction of the carbon nanotube wire.

5. The method according to claim 1, wherein the carbon nanotube structure comprises a plurality of carbon nanotube arrays, the carbon nanotube arrays comprise a plurality of carbon nanotubes, the plurality of carbon nanotubes extend along a same direction, and the extending direction of the plurality of carbon nanotubes is perpendicular to the substrate.

6. The method of claim 1, wherein the carbon nanotube structure is a carbon nanotube composite structure, and the carbon nanotube composite structure comprises a pure carbon nanotube structure and a conductive polymer material.

7. The method according to claim 1, wherein the carbon nanotube structure is formed by coating a carbon nanotube slurry on the surface of the substrate, and the surface of the carbon nanotube slurry away from the substrate comprises a plurality of carbon nanotube burrs.

8. The method of claim 1, wherein the carbon nanotube structure comprises a plurality of ultra-long carbon nanotubes extending along a same direction, at least a portion of the ultra-long carbon nanotubes comprising carbon nanotube tips.

9. The method of removing static electricity according to claim 1, wherein the material of the substrate comprises at least one of a metallic material, a carbon material, or a conductive polymer material.

10. A method of destaticizing comprising the steps of:

and approaching the static eliminating device to the object with static electricity, wherein the conducting structure is not in contact with the object with static electricity, and the conducting structure is one of a nanowire structure or a two-dimensional nanostructure.