Low-resistance transparent anti-oxidation conductive film

Abstract

The utility model discloses a low-resistance transparent anti-oxidation conductive film, comprising a substrate layer having a first surface and a second surface opposite to each other along a film thickness direction; the conductive layer is arranged on the first surface and / or the second surface; the anti-oxidation layer is arranged on the surface, far away from the base material layer, of the conductive layer; the anti-oxidation layer comprises a graphene layer. The low-resistance transparent anti-oxidation conductive film is reasonable in structure, and the conductive layer is protected through the anti-oxidation layer, so that the service life of the conductive film is prolonged; and through the arrangement of the graphene layers, the conductivity of the conductive film is enhanced, the graphene layers are stacked with the conductive layers, interface contact between the layers is optimized, the resistance is reduced, and oxidation of the conductive layers can be prevented by utilizing the shielding effect of the graphene layers.

Description

Technical Field

[0001] The utility model relates to the technical field of conductive films, in particular to a low-resistance transparent anti-oxidation conductive film. Background Art

[0002] Transparent conductive films can be used in modern display panels, such as mobile phones, e-books, monitors, etc. The traditional conductive film is indium tin oxide (ITO) film, but ITO film needs to be prepared in a vacuum environment, the process is complex and the preparation cost is high; ITO contains the scarce element indium, which is expensive, toxic, and easy to break and bend; its surface resistance is large and the light transmittance is low. Currently, nano-nanometal is commonly used as the conductive layer. Due to its large surface area, nano-metal is indeed prone to oxidation reaction after contact with air.

[0003] Therefore, it is necessary to improve the conductive film in the prior art. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects existing in the prior art and provide a low-resistance transparent anti-oxidation conductive film, which protects the conductive layer by the anti-oxidation layer, thereby improving the service life of the conductive film; and through the provision of the graphene layer, not only the conductivity of the conductive film is enhanced, but also the resistance is reduced by stacking with the conductive layer and optimizing the interface contact between the layers, and their shielding effect can be used to prevent the oxidation of the conductive layer.

[0005] In order to achieve the above technical effects, the technical solution of the utility model is: a low-resistance transparent anti-oxidation conductive film, comprising:

[0006] A substrate layer having a first surface and a second surface opposite to each other in a film thickness direction;

[0007] A conductive layer, disposed on the first surface and / or the second surface;

[0008] An anti-oxidation layer is disposed on a surface of the conductive layer away from the substrate layer;

[0009] The anti-oxidation layer includes a graphene layer.

[0010] A preferred technical solution is that the anti-oxidation layer includes a first anti-oxidation unit layer and a second anti-oxidation unit layer, the first anti-oxidation unit layer is close to the conductive layer, and the first anti-oxidation unit layer is an anti-oxidation surfactant layer.

[0011] A preferred technical solution is that the second anti-oxidation unit layer is a graphene layer.

[0012] A preferred technical solution is that the substrate layer is a composite layer of one or more of a CPI transparent polyimide film, a COP cycloolefin polymer resin film, a TPU film and a PET film.

[0013] A preferred technical solution is that the conductive layer is a nanosilver conductive layer.

[0014] A preferred technical solution is that the nanosilver conductive layer is evenly distributed with nanosilver wires, and the aspect ratio of the nanosilver wires is greater than or equal to 1000.

[0015] A preferred technical solution is that the conductive layer is connected to the substrate layer via a bendable hardened adhesive layer.

[0016] A preferred technical solution is that a protective layer is provided on the surface of the anti-oxidation layer away from the conductive layer.

[0017] A preferred technical solution is that the thickness of the substrate layer is 25-100 μm, the thickness of the conductive layer is 10-100 nm, and the thickness of the anti-oxidation layer is 0.05-0.1 μm.

[0018] The advantages and beneficial effects of the utility model are:

[0019] The low-resistance transparent anti-oxidation conductive film has a reasonable structure. The anti-oxidation layer protects the conductive layer, thereby increasing the service life of the conductive film. The setting of the graphene layer can not only enhance the conductivity of the conductive film, but also stack it with the conductive layer and optimize the interface contact between the layers to reduce the resistance, and can also utilize their shielding effect to prevent the oxidation of the conductive layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of Example 1 of the low-resistance transparent anti-oxidation conductive film of the utility model;

[0021] Figure 2 It is a structural schematic diagram of Example 2 of the low-resistance transparent anti-oxidation conductive film of the utility model.

[0022] In the figure: 1, substrate layer; 2, conductive layer; 3, anti-oxidation layer; 4, protective layer; 12, bendable hardened adhesive layer; 31, anti-oxidation surfactant layer; 32, graphene layer. DETAILED DESCRIPTION

[0023] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0024] The “surface” is based on the low-resistance transparent anti-oxidation conductive film in normal use state, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0025] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention of the utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0026] like Figure 1~2 As shown, the utility model discloses a low-resistance transparent anti-oxidation conductive film, which comprises a substrate layer 1, a conductive layer 2 and an anti-oxidation layer 3. The anti-oxidation layer 3 is arranged on the surface of the conductive layer 2 away from the substrate layer 1.

[0027] The substrate layer 1 has a first surface and a second surface that are opposite to each other along the film thickness direction; in some embodiments, the conductive layer 2 is disposed on the first surface or the second surface, that is, a single-sided conductive film.

[0028] In some embodiments, the conductive layer 2 is disposed on the first surface and the second surface, that is, a double-sided conductive film.

[0029] The anti-oxidation layer 3 includes a first anti-oxidation unit layer 31 and a second anti-oxidation unit layer 32, the first anti-oxidation unit layer is close to the conductive layer 2, and the first anti-oxidation unit layer is an anti-oxidation surfactant layer 31. The second anti-oxidation unit layer is a graphene layer 32. The first anti-oxidation unit layer improves the adhesion and coverage of the second anti-oxidation unit layer with the conductive layer 2. Therefore, the anti-oxidation layer 3 composed of the first anti-oxidation unit layer and the second anti-oxidation unit layer improves the stability of the anti-oxidation layer. Among them, surfactants with antioxidant properties mainly include the following categories: nitrogen or sulfur-containing surfactants, because the molecules contain nitrogen or sulfur atoms, these atoms can provide additional electron pairs to react with free radicals, thereby terminating the chain oxidation reaction, such as some amino acid or peptide surfactants because of their nitrogen-containing structure and exhibit antioxidant ability; vitamin E (tocopherol) derived surfactants; polymer surfactants, such as polyvinyl alcohol (PVA), polyethylene oxide (PEO), etc., in addition to providing a physical barrier to reduce oxidation, themselves or their modified products may also have direct antioxidant ability; amine oxide surfactants, this type of surfactant has unique amphoteric properties, some varieties due to the nitrogen atoms contained in the molecular structure show a certain antioxidant, can participate in the free radical scavenging process. The setting of the graphene layer 32 can not only enhance the conductivity of the conductive film, stack with the conductive layer 2 and optimize the interface contact between the layers to reduce resistance, but also use their shielding effect to prevent the oxidation of silver nanowires.

[0030] The substrate layer 1 is one or more composite layers of CPI transparent polyimide film, COP cycloolefin polymer resin film, TPU film and PET film. CPI (transparent polyimide film) has extremely high transparency and light transmittance close to glass, which is suitable for display applications requiring high clarity; it has excellent thermal stability and can maintain stable structure and performance in extreme temperature environments; it has good resistance to a variety of chemicals, which extends the service life of the conductive film; it has good mechanical properties, including high tensile strength and elasticity, which is suitable for applications that require bending or folding; it maintains good dimensional stability over a wide temperature range, which helps maintain the accuracy of the conductive film. COP (cycloolefin polymer resin film) is similar to CPI. COP also has very good transparency and surface gloss, which is suitable for applications with high visual requirements. COP hardly absorbs water, which helps to maintain the electrical properties of the conductive film; it is stable to most chemicals and will not react with conductive materials, which improves the reliability of the conductive film; COP has good biocompatibility and is suitable for conductive film applications related to medical and food packaging. TPU (thermoplastic polyurethane film) has excellent elasticity and wear resistance, and is suitable for conductive film applications that require frequent bending or abrasion resistance; as a thermoplastic material, TPU can be recycled, which is in line with the trend of environmental protection; hardness, transparency and color can be adjusted as needed to provide flexibility; it has good resistance to environmental factors such as ultraviolet rays and moisture, and extends its service life. PET (polyethylene terephthalate film) Compared with other advanced films, PET has a lower cost and is suitable for large-scale production; it has higher strength and rigidity; low thermal expansion coefficient, good dimensional stability, and is suitable for precision electronic applications; PET itself is transparent and has good electrical insulation, and is a common choice for traditional conductive film applications.

[0031] The conductive layer 2 is a nanosilver conductive layer, wherein the nanosilver conductive layer includes nanosilver wires interlaced to form a mesh structure, the nanosilver conductive layer is evenly distributed with the nanosilver wires, and the aspect ratio of the nanosilver wires is greater than or equal to 1000.

[0032] The conductive layer 2 is connected to the substrate layer 1 through a bendable hardened adhesive layer 12. The material of the bendable hardened adhesive layer 12 is a polyurethane hardened adhesive layer. The hardened adhesive is coated on the surface of the dried and solidified nanosilver conductive layer, penetrates into the nanosilver conductive layer 2, and is fixedly connected to the substrate layer 1. The thickness of the bendable hardened adhesive layer 12 is less than or equal to the thickness of the nanosilver conductive layer 2.

[0033] A protective layer 4 is disposed on the surface of the anti-oxidation layer 3 away from the conductive layer 2. The protective layer 4 is a PE film or a PET film.

[0034] The thickness of the base material layer 1 is 25 to 100 μm, the thickness of the conductive layer 2 is 10 to 100 nm, and the thickness of the anti-oxidation layer 3 is 0.05 to 0.1 μm.

[0035] Example 1

[0036] like Figure 1 As shown, the low-resistance transparent anti-oxidation conductive film of Example 1 includes a substrate layer 1, a conductive layer 2 and an anti-oxidation layer 3, the substrate layer 1 has a first surface and a second surface opposite to each other along the film thickness direction, the conductive layer 2 is arranged on the first surface, the anti-oxidation layer 3 is arranged on the surface of the conductive layer 2 away from the substrate layer 1, and the surface of the anti-oxidation layer 3 away from the conductive layer 2 is provided with a protective layer 4. Among them, the anti-oxidation layer 3 includes a first anti-oxidation unit layer and a second anti-oxidation unit layer, the first anti-oxidation unit layer is close to the conductive layer 2, the first anti-oxidation unit layer is an anti-oxidation surfactant layer 31, and the second anti-oxidation unit layer is a graphene layer 32. The conductive layer 2 is connected to the substrate layer 1 through a bendable hardened adhesive layer 12. Among them, the substrate layer 1 is made of TPU film. The material of the bendable hardened adhesive layer 12 is a polyurethane hardened adhesive layer, which further improves the bending resistance of the conductive film. The conductive film is a single-sided conductive film.

[0037] Example 2

[0038] like Figure 2 As shown, Example 2 is based on Example 1, with the difference that the conductive layer 2 is arranged on the first surface and the second surface, that is, a double-sided conductive film, and the surfaces of the two conductive layers 2 away from the substrate layer 1 are both provided with an anti-oxidation layer 3.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A low-resistance transparent anti-oxidation conductive film, characterized in that: include: A substrate layer having a first surface and a second surface opposite to each other in a film thickness direction; A conductive layer, disposed on the first surface and / or the second surface; An anti-oxidation layer is disposed on a surface of the conductive layer away from the substrate layer; The anti-oxidation layer includes a graphene layer.

2. The low-resistance transparent anti-oxidation conductive film according to claim 1, characterized in that: The anti-oxidation layer includes a first anti-oxidation unit layer and a second anti-oxidation unit layer, wherein the first anti-oxidation unit layer is close to the conductive layer and is an anti-oxidation surfactant layer.

3. The low-resistance transparent anti-oxidation conductive film according to claim 2, characterized in that: The second anti-oxidation unit layer is a graphene layer.

4. The low-resistance transparent anti-oxidation conductive film according to claim 1, characterized in that: The substrate layer is one or more composite layers of CPI transparent polyimide film, COP cycloolefin polymer resin film, TPU film and PET film.

5. The low-resistance transparent anti-oxidation conductive film according to claim 1 or 4, characterized in that: The conductive layer is a nano silver conductive layer.

6. The low-resistance transparent anti-oxidation conductive film according to claim 5, characterized in that: The nano-silver conductive layer is evenly distributed with nano-silver wires, and the aspect ratio of the nano-silver wires is greater than or equal to 1000.

7. The low-resistance transparent anti-oxidation conductive film according to claim 5, characterized in that: The conductive layer is connected to the substrate layer through a bendable hardened adhesive layer.

8. The low-resistance transparent anti-oxidation conductive film according to claim 1, characterized in that: A protective layer is disposed on a surface of the anti-oxidation layer away from the conductive layer.

9. The low-resistance transparent anti-oxidation conductive film according to claim 1 or 4, characterized in that: The thickness of the substrate layer is 25 to 100 μm, the thickness of the conductive layer is 10 to 100 nm, and the thickness of the anti-oxidation layer is 0.05 to 0.1 μm.

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