A transparent conductive film material and a preparation method thereof

Abstract

This application relates to the technical field of plastic film manufacturing, and specifically discloses a transparent conductive film material and a preparation method thereof. A transparent conductive film material and a preparation method thereof include two outer layers and one inner layer. The outer layer includes the following raw materials in parts by weight: 50 - 65 parts of high-density polyethylene powder, 2.5 - 4.8 parts of a conductive enhancer; the conductive enhancer is iron hybrid multi-walled carbon nanotubes. The inner layer includes the following raw materials in parts by weight: polyester particles and a composite conductive material, and the addition amount of the composite conductive material is 5 - 8 wt% of the polyester particles. The composite conductive material includes aluminum-doped zinc oxide and indium tin oxide. In addition, the preparation method of this application has the advantages of improving the conductivity and transparency of the film material.

Description

Technical Field

[0001] The present application relates to the technical field of plastic film manufacturing, and more specifically, to a transparent conductive film material and a preparation method thereof. Background Art

[0002] With the rapid development of microelectronic products and other precision industrial products, the demand for packaging materials with antistatic properties is increasing day by day. Due to their insulating properties, traditional plastic films are prone to accumulating a large amount of static charges during production, transportation, and storage, which may damage the products encapsulated inside. For product packaging that requires antistatic properties such as solvent-based adhesives, their needs cannot be met.

[0003] With the development of technology, the market demand for high-performance film materials with both transparency and conductivity is increasing day by day. Usually, the method of coating an antistatic layer or blending is adopted to improve its conductivity. However, problems such as short coating life, decreased antistatic performance, or decreased transparency of the film may occur, affecting the aesthetics and use of the plastic film. The conductivity and transparency of the film cannot be balanced. Summary of the Invention

[0004] In order to improve the conductivity and transparency of the film material, the present application provides a transparent conductive film material and a preparation method thereof.

[0005] In a first aspect, the present application provides a transparent conductive film material, adopting the following technical solution:

[0006] A transparent conductive film material includes two outer layers and one inner layer. The outer layer includes the following raw materials in parts by weight: 50 - 65 parts of high-density polyethylene powder, 2.5 - 4.8 parts of a conductive enhancer; the conductive enhancer is iron hybrid multi-walled carbon nanotubes. The inner layer includes the following raw materials in parts by weight: polyester particles and a composite conductive material. The addition amount of the composite conductive material is 5 - 8wt% of the polyester particles. The composite conductive material includes aluminum-doped zinc oxide and indium tin oxide.

[0007] By adopting the above technical solution, both polyester and high-density polyethylene have good transparency. The outer layer is added with a conductive enhancer. Iron hybrid multi-walled carbon nanotubes have good conductivity, so that the resistance of the outer layer can be decreased with a small addition amount, and the generated static electricity can be conducted out without affecting the transparency of the outer layer of the film material. Aluminum-doped zinc oxide and indium tin oxide have good transparency and conductive properties. Aluminum-doped zinc oxide and indium tin oxide cooperate with each other to effectively improve the conductivity of the inner layer of the film material without affecting the transparency of the inner layer of the film material.

[0008] Preferably, in the composite conductive material, the mass ratio of aluminum-doped zinc oxide to indium tin oxide is (1.62 - 1.75):(1.21 - 1.34).

[0009] By adopting the above technical solution and controlling the mass ratio of aluminum-doped zinc oxide and indium tin oxide, the composite conductive material formed by the combination of the two can have better conductivity, exert a synergistic effect, and thus further improve the conductivity of the film material.

[0010] Preferably, the preparation method of the iron hybrid multi-walled carbon nanotubes comprises the following steps: ultrasonically dispersing multi-walled carbon nanotubes, ferric chloride, and ferrous sulfate heptahydrate in water, introducing nitrogen and mixing for 2 h, adding ammonia water dropwise, and after the addition is completed, placing the mixed solution in an oven and leaving it at 60 °C for 3 h, followed by precipitation, centrifugation, and washing to obtain the iron hybrid multi-walled carbon nanotubes.

[0011] By adopting the above technical solution, the multi-walled carbon nanotubes are hybridized with iron oxide, further improving the conductivity of the iron hybrid multi-walled carbon nanotubes, reducing their resistance, and thus improving the conductivity of the outer layer of the film material.

[0012] Preferably, the mass ratio of the ferric chloride, ferrous sulfate heptahydrate, and multi-walled carbon nanotubes is (1.32 - 1.68):(0.67 - 0.73):(0.11 - 0.15).

[0013] By adopting the above technical solution and controlling the mass ratio of ferric chloride, ferrous sulfate heptahydrate, and multi-walled carbon nanotubes, the iron oxide generated by the reaction can better combine with the multi-walled carbon nanotubes, increasing the iron loading amount in the iron hybrid multi-walled carbon nanotubes and ensuring the conductivity of the iron hybrid multi-walled carbon nanotubes.

[0014] Preferably, the iron hybrid multi-walled carbon nanotubes are further subjected to silica coating treatment: mixing the iron hybrid multi-walled carbon nanotubes with absolute ethanol and water, ultrasonically dispersing them evenly, then adding a solution of tetraethyl orthosilicate in ethanol dropwise, reacting for 24 h after the addition is completed, adding a solution of silane coupling agent in ethanol dropwise, and continuing to react for 24 h, followed by suction filtration, washing, and vacuum drying.

[0015] By adopting the above technical solution, tetraethyl orthosilicate hydrolyzes to generate silica, which deposits and adheres to the surface of the iron hybrid multi-walled carbon nanotubes and is modified by the silane coupling agent, endowing the iron hybrid multi-walled carbon nanotubes with good dispersibility and at the same time improving the mechanical properties of the film material.

[0016] Preferably, the iron hybrid multi-walled carbon nanotubes after the silica coating treatment are further subjected to the following treatment: ultrasonically dispersing the iron hybrid multi-walled carbon nanotubes after the silica coating treatment in a hydrochloric acid solution of pyrrole, stirring in an ice-water bath for 30 min, then adding a ferric chloride solution dropwise, stirring at 0 - 5 °C for 2.5 h, followed by filtration and drying.

[0017] By adopting the above technical solution, pyrrole can undergo self-polymerization to form a polypyrrole layer on the surface of iron hybrid multi-walled carbon nanotubes after silica coating treatment. Polypyrrole has good electrical conductivity and can further improve the electrical conductivity of iron hybrid multi-walled carbon nanotubes after silica coating treatment.

[0018] Preferably, the mass ratio of the iron hybrid multi-walled carbon nanotubes after silica coating treatment to pyrrole is (1.68 - 1.75):(0.92 - 1.03).

[0019] By adopting the above technical solution, by controlling the mass ratio of the iron hybrid multi-walled carbon nanotubes after silica coating treatment to pyrrole, the coating of polypyrrole on the iron hybrid multi-walled carbon nanotubes after silica coating treatment is complete and uniform, which is beneficial to improving the electrical conductivity of the conductive enhancer.

[0020] In a second aspect, the present application provides a method for preparing a transparent conductive film material, adopting the following technical solution:

[0021] A method for preparing a transparent conductive film material includes the following steps: mixing high-density polyethylene powder with a conductive enhancer to obtain an outer layer raw material for standby; mixing polyester particles, aluminum-doped zinc oxide, and indium tin oxide to obtain an inner layer raw material for standby; and performing three-layer co-extrusion on the outer layer raw material and the inner layer raw material in the arrangement of outer layer - inner layer - outer layer to obtain a transparent conductive film material.

[0022] By adopting the above technical solution, the obtained transparent conductive film material has excellent electrical conductivity and transparency, and is suitable for packaging with high antistatic requirements.

[0023] In summary, the present application has the following beneficial effects:

[0024] 1. Since both polyester and high-density polyethylene in the present application have good transparency, and the outer layer is added with a conductive enhancer, and the iron hybrid multi-walled carbon nanotubes have good electrical conductivity, it can reduce the resistance of the outer layer when the addition amount is small, conduct the generated static electricity, and does not affect the transparency of the outer layer of the film material. Aluminum-doped zinc oxide and indium tin oxide have good transparency and electrical conductivity, and they cooperate with each other to effectively improve the electrical conductivity of the inner layer of the film material without affecting the transparency of the inner layer of the film material.

[0025] 2. By controlling the mass ratio of aluminum-doped zinc oxide and indium tin oxide in the present application, the composite conductive material formed by their combination can have more excellent electrical conductivity, exert a synergistic effect, and thus further improve the electrical conductivity of the film material.

[0026] 3. In this application, multi-walled carbon nanotubes are hybridized with iron tetroxide, which further improves the conductivity of the iron-hybridized multi-walled carbon nanotubes, reduces their resistance, and thus improves the conductivity of the outer layer of the membrane material. Detailed implementation manners

[0027] The following further elaborates on this application with reference to the embodiments.

[0028] Preparation Examples 1-10 of Conductivity Enhancer

[0029] Preparation Example 1

[0030] A method for preparing iron-hybridized multi-walled carbon nanotubes includes the following steps: 0.13 g of multi-walled carbon nanotubes, ferric chloride, and ferrous sulfate heptahydrate are ultrasonically dispersed in water. The mass ratio of ferric chloride, ferrous sulfate heptahydrate, and multi-walled carbon nanotubes is 1.32:0.67:0.11. Nitrogen is introduced and mixed for 2 h, 5 mL of ammonia water is added dropwise. After the addition is completed, the mixed solution is placed in an oven and kept at 60 °C for 3 h, followed by precipitation, centrifugation, and washing to obtain iron-hybridized multi-walled carbon nanotubes.

[0031] Preparation Example 2

[0032] A method for preparing iron-hybridized multi-walled carbon nanotubes includes the following steps: 0.15 g of multi-walled carbon nanotubes, ferric chloride, and ferrous sulfate heptahydrate are ultrasonically dispersed in water. The mass ratio of ferric chloride, ferrous sulfate heptahydrate, and multi-walled carbon nanotubes is 1.68:0.73:0.15. Nitrogen is introduced and mixed for 2 h, 5 mL of ammonia water is added dropwise. After the addition is completed, the mixed solution is placed in an oven and kept at 60 °C for 3 h, followed by precipitation, centrifugation, and washing to obtain iron-hybridized multi-walled carbon nanotubes.

[0033] Preparation Example 3

[0034] The difference between Preparation Example 3 and Preparation Example 1 is that the mass ratio of ferric chloride, ferrous sulfate heptahydrate, and multi-walled carbon nanotubes is 1.32:1.56:0.05.

[0035] Preparation Example 4

[0036] The difference between Preparation Example 4 and Preparation Example 1 is that the mass ratio of ferric chloride, ferrous sulfate heptahydrate, and multi-walled carbon nanotubes is 1.32:0.21:0.35.

[0037] Preparation Example 5

[0038] The difference between Preparation Example 5 and Preparation Example 1 is that the iron hybrid multi-walled carbon nanotubes also undergo silica coating treatment: 1.58 g of iron hybrid multi-walled carbon nanotubes are mixed with 80 mL of absolute ethanol and 80 mL of water. After ultrasonic dispersion until uniform, 16 mL of an ethanol solution of 15 wt% tetraethyl orthosilicate is added dropwise. After the addition is complete, the reaction is carried out for 24 h. Then, 12 mL of an ethanol solution of 12 wt% silane coupling agent KH-570 is added dropwise, and the reaction continues for 24 h. Then, filtration, washing, and vacuum drying are carried out.

[0039] Preparation Example 6

[0040] The difference between Preparation Example 6 and Preparation Example 1 is that the iron hybrid multi-walled carbon nanotubes also undergo silica coating treatment: 1.35 g of iron hybrid multi-walled carbon nanotubes are mixed with 75 mL of absolute ethanol and 70 mL of water. After ultrasonic dispersion until uniform, 20 mL of an ethanol solution of 15 wt% tetraethyl orthosilicate is added dropwise. After the addition is complete, the reaction is carried out for 24 h. Then, 15 mL of an ethanol solution of 12 wt% silane coupling agent KH-570 is added dropwise, and the reaction continues for 24 h. Then, filtration, washing, and vacuum drying are carried out.

[0041] Preparation Example 7

[0042] The difference between Preparation Example 7 and Preparation Example 5 is that the iron hybrid multi-walled carbon nanotubes after silica coating treatment also undergo the following treatment: The iron hybrid multi-walled carbon nanotubes after silica coating treatment are ultrasonically dispersed in a 45 wt% hydrochloric acid solution of pyrrole. The mass ratio of the iron hybrid multi-walled carbon nanotubes after silica coating treatment to pyrrole is 1.68:0.92. After stirring in an ice-water bath for 30 min, 0.1 mol / L ferric chloride solution is added dropwise, and stirring is carried out at 5 °C for 2.5 h. Then, filtration and drying are carried out.

[0043] Preparation Example 8

[0044] The difference between Preparation Example 8 and Preparation Example 5 is that the iron hybrid multi-walled carbon nanotubes after silica coating treatment also undergo the following treatment: The iron hybrid multi-walled carbon nanotubes after silica coating treatment are ultrasonically dispersed in a 45 wt% hydrochloric acid solution of pyrrole. The mass ratio of the iron hybrid multi-walled carbon nanotubes after silica coating treatment to pyrrole is 1.75:1.03. After stirring in an ice-water bath for 30 min, 0.1 mol / L ferric chloride solution is added dropwise, and stirring is carried out at 0 °C for 2.5 h. Then, filtration and drying are carried out.

[0045] Preparation Example 9

[0046] The difference between Preparation Example 9 and Preparation Example 7 is that the mass ratio of the iron hybrid multi-walled carbon nanotubes after silica coating treatment to pyrrole is 1.68:0.25.

[0047] Preparation Example 10

[0048] The difference between Preparation Example 10 and Preparation Example 7 is that the mass ratio of the silica-coated iron hybrid multi-walled carbon nanotubes to pyrrole is 1.68:1.85.

[0049] Example 1

[0050] A transparent conductive film material includes two outer layers and one inner layer. The outer layer includes the following raw materials in parts by weight: 50 kg of high-density polyethylene powder and 2.5 kg of a conductive enhancer. The high-density polyethylene powder is HDPE6070, and the conductive enhancer is the conductive enhancer prepared in Preparation Example 1. The inner layer includes the following raw materials in parts by weight: polyester particles and a composite conductive material. The polyester particles are PET-1120, and the addition amount of the composite conductive material is 5 wt% of the polyester particles. The composite conductive material includes aluminum-doped zinc oxide and indium tin oxide, and the mass ratio of aluminum-doped zinc oxide to indium tin oxide is 1.62:1.21.

[0051] The preparation method of the above transparent conductive film material includes the following steps: Mix the high-density polyethylene powder and the conductive enhancer to obtain the outer layer raw material for standby; Mix the polyester particles, aluminum-doped zinc oxide, and indium tin oxide to obtain the inner layer raw material for standby; Perform three-layer co-extrusion on the outer layer raw material and the inner layer raw material in the arrangement of outer layer - inner layer - outer layer to obtain the transparent conductive film material.

[0052] Example 2

[0053] A transparent conductive film material includes two outer layers and one inner layer. The outer layer includes the following raw materials in parts by weight: 65 kg of high-density polyethylene powder and 4.8 kg of a conductive enhancer. The high-density polyethylene powder is HDPE6070, and the conductive enhancer is the conductive enhancer prepared in Preparation Example 2. The inner layer includes the following raw materials in parts by weight: polyester particles and a composite conductive material. The polyester particles are PET-1120, and the addition amount of the composite conductive material is 8 wt% of the polyester particles. The composite conductive material includes aluminum-doped zinc oxide and indium tin oxide, and the mass ratio of aluminum-doped zinc oxide to indium tin oxide is 1.75:1.34.

[0054] The preparation method of the above transparent conductive film material includes the following steps: Mix the high-density polyethylene powder and the conductive enhancer to obtain the outer layer raw material for standby; Mix the polyester particles, aluminum-doped zinc oxide, and indium tin oxide to obtain the inner layer raw material for standby; Perform three-layer co-extrusion on the outer layer raw material and the inner layer raw material in the arrangement of outer layer - inner layer - outer layer to obtain the transparent conductive film material.

[0055] Example 3

[0056] The difference between Example 3 and Example 1 is that the conductive enhancer is the conductive enhancer prepared in Preparation Example 3.

[0057] Example 4

[0058] Example 4 is different from Example 1 in that the conductive enhancer used is the conductive enhancer prepared in Preparation Example 4.

[0059] Example 5

[0060] Example 5 is different from Example 1 in that the conductive enhancer used is the conductive enhancer prepared in Preparation Example 5.

[0061] Example 6

[0062] Example 6 is different from Example 1 in that the conductive enhancer used is the conductive enhancer prepared in Preparation Example 6.

[0063] Example 7

[0064] Example 7 is different from Example 1 in that the conductive enhancer used is the conductive enhancer prepared in Preparation Example 7.

[0065] Example 8

[0066] Example 8 is different from Example 1 in that the conductive enhancer used is the conductive enhancer prepared in Preparation Example 8.

[0067] Example 9

[0068] Example 9 is different from Example 1 in that the conductive enhancer used is the conductive enhancer prepared in Preparation Example 9.

[0069] Example 10

[0070] Example 10 is different from Example 1 in that the conductive enhancer used is the conductive enhancer prepared in Preparation Example 10.

[0071] Example 11

[0072] Example 11 is different from Example 1 in that in the composite conductive material, the mass ratio of aluminum-doped zinc oxide to indium tin oxide is 1.62:0.25.

[0073] Example 12

[0074] Example 12 is different from Example 1 in that in the composite conductive material, the mass ratio of aluminum-doped zinc oxide to indium tin oxide is 1.62:1.98.

[0075] Comparative Example 1

[0076] Comparative Example 1 is different from Example 1 in that the addition amount of the composite conductive material is 2 wt% of the polyester particles.

[0077] Comparative Example 2

[0078] The difference between Comparative Example 2 and Example 1 is that the addition amount of the composite conductive material is 12 wt% of the polyester particles.

[0079] Comparative Example 3

[0080] The difference between Comparative Example 3 and Example 1 is that no conductive enhancer is added to the outer layer.

[0081] Comparative Example 4

[0082] The difference between Comparative Example 4 and Example 1 is that an equal amount of aluminum-doped zinc oxide is used instead of the composite conductive material.

[0083] Comparative Example 5

[0084] The difference between Comparative Example 5 and Example 1 is that an equal amount of indium tin oxide is used instead of the composite conductive material.

[0085] Comparative Example 6

[0086] The difference between Comparative Example 6 and Example 1 is that no composite conductive material is added to the inner layer.

[0087] According to the raw materials and preparation methods of Examples 1-12 and Comparative Examples 1-6, transparent conductive film materials were prepared. The resistance of the film materials was detected using a resistivity tester, and the haze of the film materials was tested using a haze meter. The results were recorded in Table 1.

[0088] Table 1 Resistance and Haze of Film Materials

[0089] Project Resistance / Ω Haze / % Example 1 <![CDATA[1.25×10 8 > 1.68 Example 2 <![CDATA[1.23×10 8 > 1.67 Example 3 <![CDATA[2.22×10 8 > 1.69 Example 4 <![CDATA[2.23×10 8 > 1.68 Example 5 <![CDATA[1.02×10 8 > 1.12 Example 6 <![CDATA[1.06×10 8 > 1.05 Example 7 <![CDATA[1.04×10 8 > 1.67 Example 8 <![CDATA[1.03×10 8 > 1.68 Example 9 <![CDATA[1.98×10 8 > 1.67 Example 10 <![CDATA[2.01×10 8 > 1.68 Example 11 <![CDATA[2.13×10 8 > 1.69 Example 12 <![CDATA[2.15×10 8 > 1.76 Comparative Example 1 <![CDATA[2.95×10 9 > 1.69 Comparative Example 2 <![CDATA[2.86×10 9 > 1.56 Comparative Example 3 <![CDATA[1.25×10 10 > 1.67 Comparative Example 4 <![CDATA[3.58×10 8 > 1.69 Comparative Example 5 <![CDATA[3.67×10 8 > 1.69 Comparative Example 6 <![CDATA[1.59×10 10 > 1.68

[0090] It can be seen from Examples 1-2, Comparative Example 3, Comparative Example 6, and Table 1 that the film materials prepared in Examples 1-2 have lower resistance and lower haze, indicating that the film materials prepared in Examples 1-2 have better conductivity and transparency. Both polyester and high-density polyethylene have relatively high transparency but good insulation properties. Adding a conductive enhancer to the outer layer, iron hybrid multi-walled carbon nanotubes have good conductivity, so that a small addition amount can reduce the resistance of the outer layer and conduct the generated static electricity. At the same time, due to the small addition amount, it does not affect the transparency of the outer layer of the film material. Adding a composite conductive material to the inner layer, both aluminum-doped zinc oxide and indium tin oxide have good conductive properties, and they can cooperate with each other to effectively improve the conductive performance of the inner layer of the film material, and aluminum-doped zinc oxide and indium tin oxide have good transparency and do not affect the transparency of the inner layer of the film material.

[0091] Compared with Examples 1-2, in Examples 3-4, the resistance of the film material prepared increases and the conductivity decreases. When the conductive enhancer used in Examples 3-4 was prepared, the mass ratio of ferric chloride, ferrous sulfate heptahydrate and multi-walled carbon nanotubes was changed, which directly affected the deposition of magnetite on the surface of multi-walled carbon nanotubes and the degree of combination between magnetite and multi-walled carbon nanotubes. After the mass ratio was changed, the deposition amount of magnetite decreased or the degree of combination with multi-walled carbon nanotubes decreased, thereby reducing the conductivity of iron hybrid multi-walled carbon nanotubes and further reducing the conductivity of the film material.

[0092] Compared with Examples 1-2, in Examples 5-6, the resistance and haze of the film material prepared decrease, and the conductivity and transparency increase. When the conductive enhancer used in Examples 5-6 was prepared, silica and silane coupling agent were used to treat the iron hybrid multi-walled carbon nanotubes. Tetraethyl orthosilicate hydrolyzes to generate silica, which deposits and adheres to the surface of the iron hybrid multi-walled carbon nanotubes and is modified by the silane coupling agent, making the iron hybrid multi-walled carbon nanotubes have good dispersibility and at the same time can improve the mechanical properties of the film material.

[0093] Compared with Examples 5-6, in Examples 7-8, the resistance of the film material prepared in Examples 5-6 decreases and the conductivity increases. When the conductive enhancer used in Examples 7-8 was prepared, pyrrole coating treatment was carried out. Pyrrole self-polymerizes to form a polypyrrole layer on the surface of the iron hybrid multi-walled carbon nanotubes after silica coating treatment. Polypyrrole has good electrical conductivity, and the coated conductive enhancer has better electrical conductivity, thus improving the electrical conductivity of the film material.

[0094] Compared with Examples 7-8, in Examples 9-10, the resistance of the film material prepared increases and the conductivity decreases. When the conductive enhancer used in Examples 7-8 was prepared, the mass ratio of the iron hybrid multi-walled carbon nanotubes after silica coating treatment to pyrrole was changed. When the mass ratio decreases, the polypyrrole layer does not completely coat the iron hybrid multi-walled carbon nanotubes after silica coating treatment, reducing the loading amount of polypyrrole. When the mass ratio increases, pyrrole self-polymerizes and agglomerates, and the morphology of the polypyrrole layer is poor, affecting the electrical conductivity of the conductive enhancer.

[0095] Compared with Examples 1-2, in Examples 11-12 and Comparative Examples 4-5, the resistance of the film material prepared in Examples 11-12 increases and the conductivity decreases. In Examples 11-12, the mass ratio of aluminum-doped zinc oxide and indium tin oxide was changed. In Comparative Example 4, only aluminum-doped zinc oxide was added, and in Comparative Example 5, only indium tin oxide was added, indicating that the combination of aluminum-doped zinc oxide and indium tin oxide has a synergistic effect, which is more effective than using one of them alone. At the same time, the mass ratio of the two composites affects the synergistic effect of aluminum-doped zinc oxide and indium tin oxide.

[0096] Compared with Examples 1-2, the resistance of the film materials prepared in Comparative Examples 1-2 increases and the conductivity decreases. In Comparative Examples 1-2, the addition amount of the composite conductive material is changed, and the addition amount of the composite conductive material decreases, resulting in a decrease in the conductivity of the inner layer. Moreover, when the addition amount of the composite conductive material decreases, uneven distribution is likely to occur, reducing the conductivity of the inner layer.

[0097] This specific embodiment is only an interpretation of the present application and does not limit the present application. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. A transparent conductive film material, characterized in that: The invention comprises two outer layers and an inner layer, wherein the outer layer comprises the following raw materials in parts by weight: 50-65 parts of high-density polyethylene powder and 2.5-4.8 parts of a conductive enhancer; the conductive enhancer is an iron-hybridized multi-walled carbon nanotube; and the inner layer comprises the following raw materials in parts by weight: polyester particles and a composite conductive material, wherein the addition amount of the composite conductive material is 5-8wt% of the polyester particles, and the composite conductive material comprises aluminum-doped zinc oxide and indium tin oxide; The preparation method of the iron-hybridized multi-walled carbon nanotubes comprises the following steps: ultrasonically dispersing multi-walled carbon nanotubes, ferric chloride and ferrous sulfate heptahydrate in water, introducing nitrogen and mixing for 2 hours, dripping ammonia water, placing the mixed solution in an oven after the dripping is completed, placing it at 60°C for 3 hours, precipitating, centrifuging and washing to obtain the iron-hybridized multi-walled carbon nanotubes, wherein the mass ratio of the ferric chloride, ferrous sulfate heptahydrate and multi-walled carbon nanotubes is (1.32-1.68):(0.67-0.73):(0.11-0.15).

2. A transparent conductive film material according to claim 1, characterized in that: In the composite conductive material, the mass ratio of aluminum-doped zinc oxide to indium tin oxide is (1.62-1.75):(1.21-1.34).

3. The transparent conductive film material according to claim 1, characterized in that: The iron hybrid multi-walled carbon nanotubes are also subjected to a silicon dioxide coating treatment: the iron hybrid multi-walled carbon nanotubes are mixed with anhydrous ethanol and water, and after being uniformly dispersed by ultrasonication, an ethanol solution of tetraethyl orthosilicate is added dropwise, and the reaction is carried out for 24 hours after the addition is completed, an ethanol solution of a silane coupling agent is added dropwise, and the reaction is continued for 24 hours, and then the mixture is filtered, washed, and vacuum dried.

4. The transparent conductive film material according to claim 3, characterized in that: The iron hybrid multi-walled carbon nanotubes coated with silica are further treated as follows: ultrasonically dispersing the iron hybrid multi-walled carbon nanotubes coated with silica in a pyrrole hydrochloric acid solution, stirring in an ice-water bath for 30 minutes, adding ferric chloride solution dropwise, stirring at 0-5° C. for 2.5 hours, filtering and drying.

5. The transparent conductive film material according to claim 4, characterized in that: The mass ratio of the iron hybrid multi-walled carbon nanotubes after the silicon dioxide coating treatment to pyrrole is (1.68-1.75):(0.92-1.03).

6. The method for preparing the transparent conductive film material according to any one of claims 1 to 5, characterized in that: The method comprises the following steps: mixing high-density polyethylene powder with a conductive enhancer to prepare an outer layer raw material for use; mixing polyester particles, aluminum-doped zinc oxide and indium tin oxide to prepare an inner layer raw material for use; and co-extruding the outer layer raw material and the inner layer raw material in an outer layer-inner layer-outer layer arrangement to prepare a transparent conductive film material.