CN108735333B - Transparent conductive film and manufacturing method thereof - Google Patents
Transparent conductive film and manufacturing method thereof Download PDFInfo
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- CN108735333B CN108735333B CN201810575776.4A CN201810575776A CN108735333B CN 108735333 B CN108735333 B CN 108735333B CN 201810575776 A CN201810575776 A CN 201810575776A CN 108735333 B CN108735333 B CN 108735333B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
Abstract
The embodiment of the invention discloses a transparent conductive film and a manufacturing method thereof, and the method comprises the steps of coating a nano silver solution on the surface of a substrate to form a coating layer, applying an electric field to nano silver wires in the coating layer before the coating layer is cured to form the transparent conductive film, and changing the arrangement direction of the nano silver wires in the coating layer to enable the nano silver wires in the coating layer to be arranged according to a preset arrangement mode, so that the transparent conductive film which meets the use requirement of a resistance ratio is obtained, and the problem that the design requirement of a product which adopts the nano silver conductive film as the conductive film is higher due to the fact that the nano silver conductive film has a difference in the transverse and longitudinal resistance ratios in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of conductive films, in particular to a transparent conductive film and a manufacturing method thereof.
Background
With the development of scientific technology, the types of thin films (i.e., conductive films) having a conductive function are increasing, and among them, ITO (Indium Tin Oxide) transparent conductive films are most commonly used. In recent years, nano silver is gradually used as an alternative material for ITO due to its advantages of low resistance, transparency, flexibility, etc., but the nano silver conductive film has a difference in resistance ratio between the horizontal and vertical directions, which results in a high design requirement for a product using the nano silver conductive film as the conductive film.
Disclosure of Invention
In order to solve the technical problems, embodiments of the present invention provide a transparent conductive film and a manufacturing method thereof, so as to solve the problem that a product using a nano silver conductive film as a conductive film has a high design requirement due to a difference between a horizontal resistance ratio and a vertical resistance ratio of the nano silver conductive film.
In order to solve the above problems, the embodiments of the present invention provide the following technical solutions:
a method for manufacturing a transparent conductive film comprises the following steps:
providing a substrate;
coating a nano silver solution on the surface of the substrate to form a coating layer, wherein the nano silver solution comprises a plurality of nano silver wires;
applying a magnetic field to the coating layer to enable the nano silver wires of the coating layer to be arranged according to a preset arrangement mode;
and curing the coating layer to form the transparent conductive film.
Preferably, the coating of the nano silver solution on the surface of the substrate to form the coating layer comprises:
and coating the nano-silver solution on the surface of the base material by adopting an ink-jet printing mode, a crack coating mode or a spraying mode to form a coating layer.
Preferably, applying a magnetic field to the coating layer to arrange the silver nanowires of the coating layer according to a preset arrangement mode includes:
and applying a magnetic field to the coating layer by using a permanent magnet, so that the nano silver wires of the coating layer are distributed according to a preset distribution mode.
Preferably, applying a magnetic field to the coating layer by using a permanent magnet, so that the arrangement of the silver nanowires of the coating layer according to a preset arrangement mode comprises:
and applying a magnetic field to the coating layer by using a permanent magnet, fixing the position of the permanent magnet, and applying a magnetic field in a fixed direction to the coating layer, so that the nano silver wires of the coating layer are all distributed in the same direction.
Preferably, applying a magnetic field to the coating layer by using a permanent magnet, so that the arrangement of the silver nanowires of the coating layer according to a preset arrangement mode comprises:
and applying a magnetic field to the coating layer by using a permanent magnet, rotating the permanent magnet, and changing the direction of the magnetic field so that the nano silver wires of the coating layer are arranged in a disordered manner.
Preferably, applying a magnetic field to the coating layer to arrange the silver nanowires of the coating layer according to a preset arrangement mode includes:
and applying a magnetic field to the coating layer by using an electromagnet, so that the nano silver wires of the coating layer are distributed according to a preset distribution mode.
Preferably, applying a magnetic field to the coating layer by using an electromagnet, so that the arrangement of the nano silver wires of the coating layer according to a preset arrangement mode comprises:
and applying a magnetic field to the coating layer by using an electromagnet, fixing the current direction in the electromagnet, and applying a magnetic field in a fixed direction to the coating layer, so that the nano silver wires of the coating layer are all distributed in the same direction.
Preferably, applying a magnetic field to the coating layer by using an electromagnet, so that the arrangement of the nano silver wires of the coating layer according to a preset arrangement mode comprises:
and applying a magnetic field to the coating layer by using an electromagnet, and changing the direction of current in the electromagnet so as to change the direction of the magnetic field, so that the nano silver wires of the coating layer are arranged in a disordered manner.
Preferably, the substrate is a glass substrate or a PET substrate or a COP substrate.
A transparent conductive film is manufactured by the manufacturing method provided by any one of the above.
Compared with the prior art, the technical scheme has the following advantages:
according to the technical scheme provided by the embodiment of the invention, after the nano silver solution is coated on the surface of the substrate to form the coating layer, before the coating layer is cured to form the transparent conductive film, the electric field is applied to the nano silver wires in the coating layer, and the arrangement direction of the nano silver wires in the coating layer is changed, so that the nano silver wires in the coating layer are arranged according to the preset arrangement mode, and the transparent conductive film which meets the use requirement resistance ratio is obtained.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a process of coating a nano-silver solution on a substrate;
fig. 2 is a flowchart of a method for manufacturing a transparent conductive film according to an embodiment of the invention;
fig. 3 is a schematic view illustrating an arrangement of nano silver wires in a transparent conductive film manufactured by using the method for manufacturing a transparent conductive film according to an embodiment of the present invention;
fig. 4 is a schematic view illustrating another arrangement of the nano silver wires in the transparent conductive film manufactured by the manufacturing method of the transparent conductive film according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As described in the background section, the nano silver conductive film has a difference in resistance ratio between the transverse direction and the longitudinal direction, so that the design requirement of a product using the nano silver conductive film as the conductive film is high.
The inventor has found that, since the nano silver exists in a filamentous form, the diameter of the nano silver is about 10 nm, and the length of the line is about 45 μm, so that the length and the diameter of the nano silver are greatly different, as shown in fig. 1, during the formation process, one end of the nano silver wire 02 contacts the substrate 01, the other end of the nano silver wire contacts the coating head 03 of the coating device, when the nano silver wire is coated on the substrate 01 along with the movement of the coating head 03, most of the nano silver wire is attached to the same direction, and is arranged in a linear manner, and shows a certain directionality, specifically, the length direction of the nano silver wire is parallel to the coating direction X, the diameter direction is perpendicular to the coating direction, and after the coating of each nano silver wire is completed, the number of the nano silver wires connected together in the parallel to the coating direction is larger than the number of the nano silver wires connected together in the perpendicular to the coating direction (only a small number of the nano silver wires connected in the longitudinal direction), thus, the resistance of the conductive film formed along the coating direction X is large and the resistance perpendicular to the coating direction is small, resulting in a large difference in resistance between the lateral direction (parallel to the coating direction X) and the longitudinal direction (perpendicular to the coating direction X) of the conductive film formed using the nano-silver wires coated on the substrate.
In view of this, an embodiment of the present invention provides a method for manufacturing a transparent conductive film, as shown in fig. 2, the method includes:
s1: a substrate is provided.
Since the nano silver is generally prepared in a solution state to prepare the transparent conductive film, in the embodiment of the present invention, a substrate is required to be provided as a carrier of the nano silver solution in the preparation process of the transparent conductive film.
Specifically, in an embodiment of the present invention, the substrate may be a glass substrate, a PET (Polyethylene terephthalate) substrate, a COP (Coefficient of performance) substrate, or another material substrate, which is not limited in this respect, and is determined as the case may be.
In addition to the above embodiments, in one specific embodiment of the present invention, the solvent of the nano silver solution may be water, and may also be other dispersing agents, which is not limited in this respect, as long as the nano silver can be placed therein to form the nano silver solution.
S2: and coating a nano silver solution on the surface of the substrate to form a coating layer, wherein the nano silver solution comprises a plurality of nano silver wires.
In one embodiment of the present invention, the coating of the nano silver solution on the surface of the substrate to form the coating layer comprises: coating a nano silver solution on the surface of the base material in an ink-jet printing mode to form a coating layer; in another embodiment of the present invention, the coating of the nano silver solution on the surface of the substrate to form the coating layer comprises: coating a nano silver solution on the surface of the base material by adopting a crack coating mode to form a coating layer; in yet another embodiment of the present invention, the coating of the nano silver solution on the surface of the substrate to form the coating layer comprises: the nano silver solution is applied to the surface of the substrate by spraying to form a coating layer, but the invention is not limited thereto, and in other embodiments of the invention, the nano silver solution may be applied to the surface of the substrate by other methods to form the coating layer.
S3: and applying a magnetic field to the coating layer to enable the nano silver wires of the coating layer to be arranged according to a preset arrangement mode.
In the embodiment of the invention, a magnetic field is applied to the coating layer to change the arrangement direction of the nano silver wires in the coating layer, so that the nano silver wires of the coating layer are arranged according to a preset arrangement mode. The preset direction may be a certain direction arrangement, or a disordered arrangement, which is not limited in this respect, and in other embodiments of the present invention, the preset arrangement direction may also be other arrangement directions, as the case may be.
Specifically, as shown in fig. 3, when a fixed magnetic field 30 is applied to the nano silver wires 20 in the coating layer on the substrate 10, the nano silver wires 20 in the coating layer are all arranged in the same direction, which may be parallel to the coating direction, may also be perpendicular to the coating direction, and may also form any angle with the coating direction, which is not limited in the present invention, and at this time, the difference between the resistances in the transverse direction X and the longitudinal direction Y of the manufactured transparent conductive film is large, and the resistance ratio is far from 1; as shown in fig. 4, when a varying magnetic field 30 is applied to the nano silver wires 20 in the coating layer on the substrate 10, the nano silver wires 20 in the coating layer are arranged in a disordered manner, and at this time, the resistance difference between the transverse direction X and the longitudinal direction Y of the transparent conductive film is small, and the resistance ratio is close to 1.
On the basis of any of the above embodiments, in an embodiment of the present invention, applying a magnetic field to the coating layer to arrange the silver nanowires of the coating layer according to a predetermined arrangement includes: and applying a magnetic field to the coating layer by using a permanent magnet, so that the nano silver wires of the coating layer are distributed according to a preset distribution mode.
On the basis of the above embodiments, in one embodiment of the present invention, applying a magnetic field to the coating layer by using a permanent magnet so that the silver nanowires of the coating layer are arranged in a predetermined arrangement includes: and applying a magnetic field to the coating layer by using a permanent magnet, fixing the position of the permanent magnet, and applying a magnetic field in a fixed direction to the coating layer, so that the nano silver wires of the coating layer are all distributed in the same direction. In another embodiment of the present invention, applying a magnetic field to the coating layer by using a permanent magnet, such that the silver nanowires of the coating layer are arranged in a predetermined arrangement, includes: and applying a magnetic field to the coating layer by using a permanent magnet, rotating the permanent magnet, and changing the direction of the magnetic field so that the nano silver wires of the coating layer are arranged in a disordered manner.
In another embodiment of the present invention, applying a magnetic field to the coating layer such that the silver nanowires of the coating layer are arranged in a predetermined arrangement includes: and applying a magnetic field to the coating layer by using an electromagnet, so that the nano silver wires of the coating layer are distributed according to a preset distribution mode.
On the basis of the above embodiment, in an embodiment of the present invention, applying a magnetic field to the coating layer by using an electromagnet, so that the arranging of the silver nanowires of the coating layer according to a preset arrangement mode includes: and applying a magnetic field to the coating layer by using an electromagnet, fixing the current direction in the electromagnet, and applying a magnetic field in a fixed direction to the coating layer, so that the nano silver wires of the coating layer are all distributed in the same direction. In another embodiment of the present invention, applying a magnetic field to the coating layer by using an electromagnet, such that the arranging of the silver nanowires of the coating layer according to the preset arrangement comprises: and applying a magnetic field to the coating layer by using an electromagnet, and changing the direction of the current in the electromagnet so as to change the direction of the magnetic field, so that the nano silver atoms of the coating layer are arranged in a disordered manner.
S4: and curing the coating layer to form the transparent conductive film.
Correspondingly, the embodiment of the invention also provides the transparent conductive film manufactured by the manufacturing method provided by any one of the embodiments, the transparent conductive film is manufactured by utilizing the nano silver wires, and the nano silver wires in the transparent conductive film are arranged according to a preset arrangement mode.
As can be seen from the above, in the method for manufacturing a transparent conductive film according to the embodiment of the present invention, after the nano silver solution is coated on the surface of the substrate to form the coating layer, and before the coating layer is cured to form the transparent conductive film, an electric field is applied to the nano silver wires in the coating layer to change the arrangement direction of the nano silver wires in the coating layer, so that the nano silver wires in the coating layer are arranged according to the preset arrangement manner, thereby obtaining the transparent conductive film meeting the use requirement resistance ratio, and solving the problem that the design requirement of the product using the nano silver conductive film as the conductive film is high due to the difference between the transverse resistance ratio and the longitudinal resistance ratio of the nano silver conductive film in the prior art.
In the description, each part is described in a progressive manner, each part is emphasized to be different from other parts, and the same and similar parts among the parts are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A method for manufacturing a transparent conductive film is characterized by comprising the following steps:
providing a substrate;
coating a nano silver solution on the surface of the substrate to form a coating layer, wherein the nano silver solution comprises a plurality of nano silver wires;
applying a magnetic field with a constantly changing direction to the coating layer to enable the nano silver wires of the coating layer to be arranged according to a preset arrangement mode, wherein the preset arrangement mode is disordered arrangement;
curing the coating layer to form a transparent conductive film;
wherein, coating the nano silver solution on the surface of the substrate to form a coating layer comprises:
and coating the nano-silver solution on the surface of the base material by adopting an ink-jet printing mode, a crack coating mode or a spraying mode to form a coating layer.
2. The method of claim 1, wherein applying a magnetic field to the coating layer such that the silver nanowires of the coating layer are arranged in a predetermined arrangement comprises:
and applying a magnetic field to the coating layer by using a permanent magnet, so that the nano silver wires of the coating layer are distributed according to a preset distribution mode.
3. The method of claim 2, wherein applying a magnetic field to the coating layer by using a permanent magnet to arrange the silver nanowires of the coating layer according to a predetermined arrangement comprises:
and applying a magnetic field to the coating layer by using a permanent magnet, rotating the permanent magnet, and changing the direction of the magnetic field so that the nano silver atoms of the coating layer are arranged in a disordered manner.
4. The method of claim 1, wherein applying a magnetic field to the coating layer such that the silver nanowires of the coating layer are arranged in a predetermined arrangement comprises:
and applying a magnetic field to the coating layer by using an electromagnet, so that the nano silver wires of the coating layer are distributed according to a preset distribution mode.
5. The method according to claim 4, wherein applying a magnetic field to the coating layer by using an electromagnet to arrange the silver nanowires of the coating layer according to a preset arrangement comprises:
and applying a magnetic field to the coating layer by using an electromagnet, and changing the direction of current in the electromagnet so as to change the direction of the magnetic field, so that the nano silver wires of the coating layer are arranged in a disordered manner.
6. The production method according to claim 1, wherein the substrate is a glass substrate or a PET substrate or a COP substrate.
7. A transparent conductive film produced by the production method according to any one of claims 1 to 6.
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| CN201810575776.4A CN108735333B (en) | 2018-06-06 | 2018-06-06 | Transparent conductive film and manufacturing method thereof |
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| CN201810575776.4A CN108735333B (en) | 2018-06-06 | 2018-06-06 | Transparent conductive film and manufacturing method thereof |
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| CN108735333A CN108735333A (en) | 2018-11-02 |
| CN108735333B true CN108735333B (en) | 2020-07-31 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012102319A1 (en) * | 2012-03-20 | 2013-09-26 | Rent A Scientist Gmbh | Nonlinear nano-wire useful e.g. for producing transparent electrodes e.g. in the fields of display, touch screen and in the field of printed electronics, comprises two linear portions and curved portion arranged between the linear portions |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100101832A1 (en) * | 2008-10-24 | 2010-04-29 | Applied Materials, Inc. | Compound magnetic nanowires for tco replacement |
| CN104008819B (en) * | 2014-05-27 | 2016-03-30 | 东莞市鑫聚光电科技有限公司 | A kind of production method of nano-silver thread nesa coating |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012102319A1 (en) * | 2012-03-20 | 2013-09-26 | Rent A Scientist Gmbh | Nonlinear nano-wire useful e.g. for producing transparent electrodes e.g. in the fields of display, touch screen and in the field of printed electronics, comprises two linear portions and curved portion arranged between the linear portions |
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