Graphene acetic acid rubber plate

Abstract

The invention discloses a graphene acetic acid rubber plate, and relates to the field of material science and engineering. The graphene acetic acid rubber plate comprises the following components: graphene, an acetic acid polymer and an additive, the content of the graphene is 10-25 wt%, preferably 15-20 wt%, and the graphene acetic acid rubber plate has good conductivity and strength; the content of the acetic acid polymer is 75-90wt%, preferably 80-85wt%, the polymer provides excellent cohesiveness and toughness in the process of forming the rubber plate, and the preparation method of the graphene acetic acid rubber plate comprises the following steps: mixing the graphene and the acetic acid polymer, and performing ultrasonic dispersion to form a uniform dispersion liquid. The graphene acetic acid rubber plate shows application potentials in multiple fields of electricity, structures, environmental protection and the like through the excellent component characteristics and the flexible forming process of the graphene acetic acid rubber plate; the material has excellent conductivity, strength, toughness and convenient processing characteristics, so that the material has remarkable beneficial effects in modern science and technology and industrial application.

Description

Technical Field

[0001] The invention relates to a novel graphene acetate rubber sheet, belongs to the field of material science and engineering, and in particular to an acetate rubber sheet containing graphene and a preparation process thereof. Background Art

[0002] With the development of nanomaterial technology, graphene has been widely used in composite materials due to its excellent electrical conductivity, thermal conductivity and mechanical strength. Acetate, as a commonly used adhesive, is often used in various industrial applications due to its good adhesion and formability. However, existing acetate sheets have certain limitations in mechanical properties and electrical conductivity. Therefore, it is of great application value to develop an acetate sheet that combines the excellent properties of graphene. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the present invention provides a graphene acetate rubber sheet, which has significantly improved mechanical properties and electrical conductivity.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a graphene acetate rubber sheet, the components of which include graphene, acetate polymer and additives, the content of the graphene is 10-25wt%, preferably 15-20wt%, and it has good conductivity and strength; the content of the acetate polymer is 75-90wt%, preferably 80-85wt%, and the polymer provides excellent adhesion and toughness in the process of forming the rubber sheet; the additives can be selected from plasticizers, stabilizers and conductive fillers, and the total content thereof is 0-10wt%; the addition of plasticizers helps to improve the flexibility and temperature resistance of the rubber sheet, while the stabilizers can improve the stability of the rubber sheet in high temperature or humid environments, and the conductive fillers significantly improve the conductivity of the rubber sheet; this combination of multiple components enables the rubber sheet to achieve an excellent balance in mechanical properties and conductivity, and is suitable for a variety of engineering and electronic application fields.

[0007] Preferably, the graphene is graphene oxide or reduced graphene oxide. Graphene oxide is obtained by a chemical method, and its advantages are that it is easy to disperse and can form a good interface bonding with the acetate polymer, thereby improving the overall performance of the rubber sheet; during the preparation process, the interaction between graphene oxide and the acetate polymer can form strong hydrogen bonds and van der Waals forces, thereby significantly improving the strength and conductivity of the final rubber sheet; in addition, choosing reduced graphene oxide as a raw material can further optimize the conductivity, provide flexible options for different application requirements, and thereby enhance the applicability and functionality of the rubber sheet.

[0008] Preferably, the acetate polymer is vinyl acetate copolymer (EVA) or acetate fiber, the former is widely used for its excellent mechanical properties and aging resistance, and the latter provides good flexibility and transparency; this specifically selected polymer gives the rubber sheet good elasticity and heat resistance, so that it can still maintain stable physical properties under various environmental conditions; by reasonably allocating the type and proportion of acetate polymers, the rubber sheet can achieve the expected effects in terms of mechanical properties (such as tensile strength, bending strength) and thermal properties (such as heat deformation temperature), and adapt to different industrial needs and market standards.

[0009] Preferably, the additives include plasticizers, stabilizers and conductive fillers, and the specific plasticizers are phthalate compounds, alcohols or esters, preferably dihexyl phthalate (DHP); the stabilizers can be selected from a variety of heat stabilizers or ultraviolet absorbers to ensure that the rubber sheet maintains its physical properties unchanged during long-term use; the conductive fillers include carbon nanotubes, silver powder or graphite powder, etc., which can not only improve the conductivity of the material, but also increase its tensile strength. The use of this composite additive provides a guarantee for the high performance of the graphene acetate rubber sheet, ensuring that it meets higher performance requirements in electrical applications.

[0010] The preparation method of the above-mentioned graphene acetate rubber sheet comprises the following steps: mixing graphene with acetate polymer and forming a uniform dispersion by ultrasonic dispersion, wherein the frequency of the ultrasonic treatment is 20-40kHz and the treatment time is 30-60 minutes to ensure the uniform distribution of graphene in the polymer matrix; subsequently adding plasticizer, stabilizer and conductive filler, and continuing stirring for 20-30 minutes to ensure that all components are fully mixed; the ultrasonic treatment in this process can effectively reduce the agglomeration of graphene, improve its dispersibility in acetate polymer, lay the foundation for the subsequent molding steps, and further enhance the performance and stability of the rubber sheet.

[0011] Preferably, coating, pressing or casting are used in the molding process, and the coating thickness is 0.1-1.0 mm, preferably 0.5 mm; the pressing molding method can heat the mixture to 60-80°C through a mold and press it under appropriate pressure for 10-30 minutes; this step ensures that the mixture is fully molded and forms a uniform rubber sheet; while the casting method requires the mixture to be cured after coating, and the curing time is 2-4 hours; such a molding process not only improves the molding efficiency, but also ensures that the thickness of the final rubber sheet is uniform and the mechanical properties are consistent, providing a reliable basis for subsequent applications.

[0012] Preferably, the curing temperature used in the curing step is 60-80°C, and the curing time is 2-4 hours, preferably 3 hours at 70°C; the temperature and time used in the curing process can adjust its crosslinking degree, thereby affecting the mechanical properties and heat resistance of the rubber sheet; the temperature and time selection in the curing process should be adjusted according to the characteristics of the polymer used to ensure that the final product achieves the best strength and toughness. The optimization of this process can not only improve production efficiency, but also ensure the long-term stability of the product and meet different industrial application requirements.

[0013] Preferably, post-treatment is performed after curing, and the post-treatment steps include heat treatment and surface treatment, the heat treatment temperature is 100-120°C, and the duration is 1 hour; the purpose of post-treatment is to further improve the mechanical properties and chemical resistance of the rubber sheet; heat treatment can promote the rearrangement of molecular chains, thereby enhancing the density and strength of the material; and surface treatment improves the adhesion and wear resistance of the rubber sheet by increasing the surface roughness or coating a protective film; these post-treatment steps help to optimize the performance of the rubber sheet, making it perform better in practical applications and suitable for use in a variety of complex environments.

[0014] Preferably, the mechanical properties of the rubber sheet include tensile strength, flexural strength and toughness, wherein the tensile strength reaches 10-25MPa, preferably 15-20MPa; the flexural strength reaches 20-40MPa, preferably 30-35MPa; the toughness is evaluated by Charpy notched impact test, preferably 2-10kJ / m 2 ; By rationally designing the component ratio and preparation process, the rubber sheet can meet the material performance requirements of specific industries and ensure its safety and reliability during use; the optimization of these performance parameters can not only enhance the market competitiveness of the graphene acetate rubber sheet, but also lay the foundation for its application in the field of new materials.

[0015] Preferably, the rubber sheet can be used in the fields of electronics, construction, aviation, etc., especially in applications requiring high-strength, lightweight, conductive materials, such as flexible electronic devices, smart materials, and battery packaging. By optimizing the material formula and preparation process of the rubber sheet, its application performance can be significantly improved to meet the specific needs of different fields; for different application fields, the formula and process parameters of the rubber sheet can be flexibly adjusted to meet specific functional requirements; for example, the content of conductive fillers can be increased for electronic applications, while its compressive strength can be enhanced for architectural applications; this diverse application potential makes the graphene acetate rubber sheet of the present invention have broad market prospects and application value.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the present invention provides a graphene acetate rubber sheet, which has the following beneficial effects:

[0018] Excellent properties of graphene:

[0019] Electrical conductivity: Graphene is a very good conductive material with high electron mobility, which makes graphene acetate sheets have significant advantages in electrical applications, such as in flexible electronic devices.

[0020] Strength and toughness: Graphene is much stronger than steel and has excellent toughness, which makes graphene acetate sheets have good durability and impact resistance in structural materials.

[0021] Effects of acetic acid:

[0022] Film-forming property: Acetic acid can form a good composite material with graphene, improve the adhesion and film-forming property of the material, and thus enhance the overall performance of the material.

[0023] Environmental protection: Acetic acid is relatively non-toxic and easy to decompose, which helps to improve the environmental friendliness of the material, making the graphene acetate sheet more in line with the concept of green development in application.

[0024] Improved performance of composite materials:

[0025] The composite of graphene and acetic acid can improve the mechanical properties, thermal stability and chemical resistance of the rubber sheet to a certain extent, and expand its application range under various extreme conditions.

[0026] Molding process

[0027] Adjustability of the preparation process:

[0028] The molding process of graphene acetate sheets can be adjusted according to different application requirements, such as by changing parameters such as graphene content, acetic acid concentration and molding temperature, so as to optimize the performance of the final product.

[0029] Simplicity of processing technology:

[0030] The molding process of acetate sheets is relatively simple, usually using methods such as casting and pressing. These processes are not only convenient for large-scale production, but also can reduce production costs and improve production efficiency.

[0031] Stability after molding:

[0032] After proper molding process, graphene acetate sheet can maintain good stability under various environmental conditions, prevent material aging and performance degradation, and extend its service life. DETAILED DESCRIPTION

[0033] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1:

[0035] A graphene acetate rubber sheet is prepared by mixing 15wt% of graphene, 80wt% of acetate polymer, 2wt% of plasticizer (such as dihexyl phthalate), 1wt% of stabilizer (such as polyvinyl alcohol), and 2wt% of conductive filler (such as carbon nanotubes). The polymer provides excellent adhesion and toughness in the process of forming the rubber sheet. The additives can be plasticizer, stabilizer and conductive filler, and the total content thereof is 0-10wt%. The addition of plasticizer helps to improve the flexibility and temperature resistance of the rubber sheet, while the stabilizer can improve the stability of the rubber sheet in high temperature or humid environment, and the conductive filler significantly improves the conductivity of the rubber sheet. This combination of multiple components enables the rubber sheet to achieve an excellent balance in mechanical properties and conductivity, and is suitable for various engineering and electronic application fields.

[0036] The graphene is graphene oxide or reduced graphene oxide. Graphene oxide is obtained by chemical method, and its advantages are that it is easy to disperse and can form a good interface with acetate polymer, thereby improving the overall performance of the rubber sheet; during the preparation process, the interaction between graphene oxide and acetate polymer can form strong hydrogen bonds and van der Waals forces, thereby significantly improving the strength and conductivity of the final rubber sheet; in addition, the selection of reduced graphene oxide as a raw material can further optimize the conductivity, provide flexible options for different application requirements, and enhance the applicability and functionality of the rubber sheet; the acetate polymer is vinyl acetate copolymer (EVA) or acetate fiber, the former is widely used for its excellent mechanical properties and aging resistance, and the latter provides good flexibility and transparency; this specifically selected polymer gives the rubber sheet good elasticity and heat resistance, making it suitable for various environments The physical properties of the rubber sheet can still be kept stable under environmental conditions; by reasonably adjusting the types and proportions of acetate polymers, the rubber sheet can achieve the expected effects in terms of mechanical properties (such as tensile strength and bending strength) and thermal properties (such as heat deformation temperature) to adapt to different industrial needs and market standards; the additives include plasticizers, stabilizers and conductive fillers, and the specific plasticizers are phthalate compounds, alcohols or esters, preferably dihexyl phthalate (DHP); the stabilizer can be selected from a variety of heat stabilizers or ultraviolet absorbers to ensure that the rubber sheet maintains its physical properties unchanged during long-term use; the selection of conductive fillers includes carbon nanotubes, silver powder or graphite powder, which can not only improve the conductivity of the material, but also increase its tensile strength; the use of this composite additive provides a guarantee for the high performance of the graphene acetate rubber sheet, ensuring that it meets higher performance requirements in electrical applications.

[0037] A method for preparing a graphene acetate rubber sheet comprises the following steps: subjecting graphene and an acetate polymer to ultrasonic treatment in an ultrasonic cleaning machine for 40 minutes at a frequency of 30 kHz to form a uniform dispersion; adding a plasticizer and a stabilizer, stirring at a speed of 800 rpm, and stirring for 20 minutes; coating the mixture on a pretreated substrate with a coating thickness of 0.5 mm; curing at 70° C. for 3 hours, cooling to room temperature, and then heat treating at 100° C. for 1 hour to obtain a graphene acetate rubber sheet with excellent mechanical properties and electrical conductivity, ensuring that all components are fully mixed; the ultrasonic treatment in the process can effectively reduce the agglomeration of graphene and improve its dispersibility in the acetate polymer. The invention lays the foundation for the subsequent molding steps and further enhances the performance and stability of the rubber sheet; in the molding process, coating, pressing or casting are adopted, and the coating thickness is 0.1-1.0mm, preferably 0.5mm; the pressing molding method can heat the mixture to 60-80°C through the mold and press it under appropriate pressure for 10-30 minutes; this step ensures that the mixture is fully molded and forms a uniform rubber sheet; while the casting method requires the mixture to be cured after coating, and the curing time is 2-4 hours; such a molding process not only improves the molding efficiency, but also ensures that the thickness of the final rubber sheet is uniform and the mechanical properties are consistent, providing a reliable foundation for subsequent applications.

[0038] Secondly, the curing temperature used in the curing step is 60-80°C, the curing time is 2-4 hours, preferably 3 hours at 70°C; the temperature and time used in the curing process can adjust its crosslinking degree, thereby affecting the mechanical properties and heat resistance of the rubber sheet; the temperature and time selection in the curing process should be adjusted according to the characteristics of the polymer used to ensure that the final product achieves the best strength and toughness; the optimization of this process can not only improve production efficiency, but also ensure the long-term stability of the product and meet different industrial application requirements; post-treatment is carried out after curing, and the post-treatment steps include heat treatment and surface treatment, the heat treatment temperature is 100-120°C, and the duration is 1 hour; the purpose of post-treatment is Further improve the mechanical properties and chemical resistance of the rubber sheet; heat treatment can promote the rearrangement of molecular chains, thereby enhancing the density and strength of the material; and surface treatment can improve the adhesion and wear resistance of the rubber sheet by increasing the surface roughness or coating a protective film; these post-treatment steps help optimize the performance of the rubber sheet, making it perform better in practical applications and suitable for use in a variety of complex environments; the mechanical properties of the rubber sheet include tensile strength, flexural strength and toughness, with the tensile strength reaching 10-25MPa, preferably 15-20MPa; the flexural strength reaches 20-40MPa, preferably 30-35MPa; the toughness is evaluated by the Charpy notched impact test, preferably 2-10kJ / m 2 .

[0039] Embodiment 2:

[0040] A graphene acetate rubber sheet is prepared by mixing 20wt% of graphene, 75wt% of acetate polymer, 1wt% of plasticizer, 2wt% of stabilizer and 3wt% of conductive filler (such as silver powder). The polymer provides excellent adhesion and toughness in the process of forming the rubber sheet. The additives may be plasticizer, stabilizer and conductive filler, and the total content thereof is 0-10wt%. The addition of plasticizer helps to improve the flexibility and temperature resistance of the rubber sheet, while the stabilizer can improve the stability of the rubber sheet in high temperature or humid environment, and the conductive filler significantly improves the conductivity of the rubber sheet. This combination of multiple components enables the rubber sheet to achieve an excellent balance in mechanical properties and conductivity, and is suitable for a variety of engineering and electronic application fields.

[0041] Among them, graphene is graphene oxide or reduced graphene oxide. Graphene oxide is obtained by chemical method. Its advantages are that it is easy to disperse and can form a good interface with acetate polymer, thereby improving the overall performance of the rubber sheet; during the preparation process, the interaction between graphene oxide and acetate polymer can form strong hydrogen bonds and van der Waals forces, thereby significantly improving the strength and conductivity of the final rubber sheet; in addition, choosing reduced graphene oxide as the raw material can further optimize the conductivity, provide flexible options for different application requirements, and enhance the applicability and functionality of the rubber sheet; the acetate polymer is vinyl acetate copolymer (EVA) or acetate fiber, the former is widely used for its excellent mechanical properties and aging resistance, and the latter provides good flexibility and transparency; this specifically selected polymer gives the rubber sheet good elasticity and heat resistance, making it suitable for various environments The physical properties can still be kept stable under the conditions; by reasonably adjusting the types and proportions of acetate polymers, the rubber sheet can achieve the expected effects in mechanical properties (such as tensile strength, bending strength) and thermal properties (such as heat deformation temperature) to adapt to different industrial needs and market standards; the additives include plasticizers, stabilizers and conductive fillers, and the specific plasticizers are phthalate compounds, alcohols or esters, preferably dihexyl phthalate (DHP); the stabilizer can choose a variety of heat stabilizers or ultraviolet absorbers to ensure that the rubber sheet maintains its physical properties unchanged during long-term use; the selection of conductive fillers includes carbon nanotubes, silver powder or graphite powder, which can not only improve the conductivity of the material, but also increase its tensile strength; the use of this composite additive provides a guarantee for the high performance of graphene acetate rubber sheet, ensuring that it meets higher performance requirements in electrical applications.

[0042] A method for preparing a graphene acetate rubber sheet comprises the following steps: subjecting graphene and an acetate polymer to ultrasonic treatment in an ultrasonic cleaning machine for 30 minutes to form a uniform dispersion; adding a plasticizer and a stabilizer, stirring at a speed of 600 rpm, and stirring for 25 minutes; using a pressing molding method to press the mixture into a rubber sheet with a thickness of 0.3 mm; curing at 80°C for 2 hours, cooling to room temperature, and performing surface treatment to obtain another graphene acetate rubber sheet with excellent performance; curing at 70°C for 3 hours, cooling to room temperature, and performing heat treatment at 100°C for 1 hour to obtain a graphene acetate rubber sheet with excellent mechanical properties and electrical conductivity, ensuring that all components are fully mixed; the ultrasonic treatment in the process can effectively reduce the agglomeration of graphene phenomenon, improve its dispersibility in acetate polymer, lay the foundation for subsequent molding steps, and further enhance the performance and stability of the rubber sheet; in the molding process, coating, pressing or casting are adopted, and the coating thickness is 0.1-1.0mm, preferably 0.5mm; the pressing molding method can heat the mixture to 60-80℃ through the mold and press it under appropriate pressure for 10-30 minutes; this step ensures that the mixture is fully molded and forms a uniform rubber sheet; while the casting method requires the mixture to be cured after coating, and the curing time is 2-4 hours; such a molding process not only improves the molding efficiency, but also ensures that the thickness of the final rubber sheet is uniform and the mechanical properties are consistent, providing a reliable foundation for subsequent applications.

[0043] Secondly, the curing temperature used in the curing step is 60-80°C, the curing time is 2-4 hours, preferably 3 hours at 70°C; the temperature and time used in the curing process can adjust its crosslinking degree, thereby affecting the mechanical properties and heat resistance of the rubber sheet; the temperature and time selection in the curing process should be adjusted according to the characteristics of the polymer used to ensure that the final product achieves the best strength and toughness; the optimization of this process can not only improve production efficiency, but also ensure the long-term stability of the product and meet different industrial application requirements; post-treatment is carried out after curing, and the post-treatment steps include heat treatment and surface treatment, the heat treatment temperature is 100-120°C, and the duration is 1 hour; the purpose of post-treatment is to further improve the mechanical properties and chemical resistance of the rubber sheet. The mechanical properties of the rubber sheet include tensile strength, flexural strength and toughness. The tensile strength reaches 10-25MPa, preferably 15-20MPa; the flexural strength reaches 20-40MPa, preferably 30-35MPa; the toughness is evaluated by the Charpy notched impact test, preferably 2-10kJ / m 2 ; Heat treatment can promote the rearrangement of molecular chains, thereby enhancing the density and strength of the material; while surface treatment can improve the adhesion and wear resistance of the rubber sheet by increasing the surface roughness or applying a protective film; these post-processing steps help optimize the performance of the rubber sheet, making it perform better in practical applications and suitable for use in a variety of complex environments.

[0044] Comparative experiment:

[0045] Experimental design:

[0046] Experimental purpose: To evaluate the superiority of the present invention by comparing the performance of different materials (graphene acetate sheet and acetate sheet of the prior art) in terms of mechanical properties, conductivity and thermal stability.

[0047] Experimental Materials:

[0048] Graphene acetate sheet (experimental group)

[0049] Component ratio: 15wt% graphene, 80wt% acetate polymer, 3wt% plasticizer, 2wt% stabilizer, 2wt% conductive filler

[0050] Prior art 1 (control group 1): Acetate polymer rubber sheet

[0051] Component ratio: 100wt% acetate polymer (no added graphene or other fillers)

[0052] Prior art 2 (control group 2): modified acetate rubber sheet

[0053] Component ratio: 70wt% acetate polymer, 30wt% conductive filler (such as carbon nanotubes), no graphene

[0054] Experimental steps:

[0055] Sample preparation:

[0056] A graphene acetate sheet is prepared according to the steps of the claims.

[0057] The samples of the prior art 1 and the prior art 2 were prepared according to their respective proportions. Performance test:

[0058] Mechanical properties test:

[0059] Tensile strength, bending strength and toughness are tested by material testing machine. Conductivity test:

[0060] The conductivity of the samples was measured using the four-probe method.

[0061] Thermal stability test:

[0062] Thermogravimetric analysis (TGA) was used to evaluate the stability of the materials at high temperatures.

[0063] Experimental data:

[0064]

[0065]

[0066] Experimental results analysis:

[0067] Mechanical properties:

[0068] The graphene acetate sheet is significantly superior to the acetate polymer sheet of the prior art in terms of tensile strength and bending strength, indicating that the addition of graphene significantly improves the strength of the material.

[0069] The toughness test results show that the toughness of the graphene acetate rubber sheet is 6.5 times that of the control group 1, which indicates that the rubber sheet is more resistant to breakage when subjected to impact.

[0070] Electrical conductivity:

[0071] The electrical conductivity of the graphene acetate sheet is 5.2S / m, which is significantly higher than that of the control group 1 (0.03S / m) and the control group 2 (0.15S / m), which verifies the significant role of graphene in improving the conductivity of materials.

[0072] Thermal stability:

[0073] The results of thermogravimetric analysis showed that the thermal weight loss temperature of the graphene acetate sheet reached 280°C, which was much higher than that of control group 1 and control group 2, which means that its performance was more stable in high temperature environment.

[0074] in conclusion:

[0075] This experimental design verifies the superiority of graphene acetate sheets in mechanical properties, electrical conductivity, and thermal stability, and demonstrates its potential application value in the fields of electronics, construction, aviation, etc. Compared with the control group of the prior art, the graphene acetate sheets exhibit more excellent comprehensive performance, supporting the innovation and practicality of the present invention.

[0076] It can be seen that the graphene acetate sheet has shown application potential in multiple fields such as electrical, structural, and environmental protection through its excellent composition characteristics and flexible molding process; its excellent conductivity, strength, toughness and convenient processing characteristics make this material have significant beneficial effects in modern science and technology and industrial applications.

Claims

1. Graphene acetate sheet, characterized in that: The following raw materials are included in mass percentage: Graphene: 0-25wt%; Acetate polymer: 75-90wt%; Additives, including but not limited to: Plasticizer: 0-5wt%; Stabilizer: 0-3wt%; Conductive filler: 0-5wt%, the conductive filler is selected from any one or more of carbon nanotubes, silver powder or copper powder.

2. The graphene acetate sheet according to claim 1, characterized in that: The graphene is graphene oxide or reduced graphene oxide, and the graphene oxide is obtained by a chemical method.

3. The graphene acetate sheet according to claim 1, characterized in that: The acetate polymer is vinyl acetate copolymer (EVA) or acetate fiber.

4. The graphene acetate sheet according to claim 1, characterized in that: The additives include plasticizers, stabilizers and conductive fillers. The specific plasticizers are phthalate compounds, alcohols or esters, preferably dihexyl phthalate (DHP); the stabilizers can be selected from a variety of heat stabilizers or ultraviolet absorbers.

5. A process for preparing the graphene acetate sheet according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1: pre-treating graphene and acetate polymer according to the above ratio, using ultrasonic dispersion method with a frequency of 20-40 kHz and an ultrasonic time of 30-60 minutes to form a uniform dispersion; Step 2: Add plasticizer and stabilizer, continue stirring, stirring speed is 500-1000rpm, stirring time is 20-30 minutes; Step 3: forming the mixture by coating, pressing or casting, with a coating thickness of 0.1-1.0 mm, preferably 0.5 mm; Step 4: Curing at a specific temperature, the curing temperature is 60-80°C, the curing time is 2-4 hours, preferably curing at 70°C for 3 hours; Step 5: After cooling to room temperature, the cured rubber sheet is post-processed. The post-processing steps include heat treatment and surface treatment. The heat treatment temperature is 100-120°C and the duration is 1 hour.

6. The process for preparing graphene acetate sheet according to claim 5, characterized in that: The graphene is mixed with the acetate polymer and dispersed by ultrasonic treatment to form a uniform dispersion. The frequency of the ultrasonic treatment is 20-40 kHz and the treatment time is 30-60 minutes to ensure uniform distribution of the graphene in the polymer matrix.

7. The process for preparing graphene acetate sheet according to claim 5, characterized in that: The molding process is carried out by coating, pressing or casting, and the coating thickness is 0.1-1.0 mm.

8. The process for preparing graphene acetate sheet according to claim 5, characterized in that: The curing step adopts a curing temperature of 60-80°C and a curing time of 2-4 hours, preferably curing at 70°C for 3 hours.

9. The process for preparing graphene acetate sheet according to claim 5, characterized in that: After curing, post-treatment is performed, and the post-treatment steps include heat treatment and surface treatment. The heat treatment temperature is 100-120° C. and the duration is 1 hour.

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