Manufacturing method of efficient thermal insulation graphene plate

Abstract

The invention relates to the technical field of graphene plate manufacturing, and discloses a manufacturing method of a high-efficiency thermal-insulation graphene plate, which comprises the following steps: S1, raw material preparation: firstly, preparing required raw materials including a cementing material, a filler, graphene, polyphenyl granules, a foaming agent, an adhesive, a water reducing agent, a dispersing agent and the like, and determining the ratio of the raw materials according to specific product requirements; s2, mixing and stirring: mixing and stirring the prepared raw materials to ensure that various components are uniformly distributed, which is crucial to the performance of a final product, and a proper amount of water or other solvents may be added in the mixing process to adjust the consistency of the mixture; the preparation method has the beneficial effects that the defects existing in the manufacturing of the efficient thermal insulation graphene plate mainly comprise intrinsic defects and external introduction defects, and the defects can be solved and optimized through measures such as external carbon source repair, transmission electron microscope and Raman spectroscopy detection, preparation in an oxygen-free environment and the like; therefore, the quality and the performance of the graphene plate are improved.

Description

Technical Field

[0001] The invention relates to the technical field of graphene plate manufacturing, and in particular to a method for manufacturing a high-efficiency thermal insulation graphene plate. Background Art

[0002] The role of high-efficiency thermal insulation graphene plates is mainly reflected in their excellent thermal insulation performance, fire safety, beautiful and personalized design, environmental protection, high cost performance, and application potential in multiple fields. High-efficiency thermal insulation graphene plates provide comprehensive solutions for construction and other fields through their excellent thermal insulation performance, fire safety, beautiful and personalized design, environmental protection and high cost performance, showing extensive application potential and value. The role of graphene plate manufacturing is mainly reflected in its unique physical and chemical properties, which make graphene plates have extensive application potential in multiple fields.

[0003] Generally, carbon-containing compounds such as methane are used as carbon sources, and graphene is grown through high-temperature decomposition on the surface of the substrate. This mechanism can be divided into carburization and carbon precipitation mechanism and surface growth mechanism, which are suitable for metal substrates with different carbon amounts. However, as a new type of two-dimensional material, graphene has many excellent physical properties, such as high electron mobility, high thermal conductivity and large specific surface area, but there are also some structural defects, which may have an adverse effect on the performance of the graphene sheet. Summary of the invention

[0004] The purpose of the present invention is to provide a method for manufacturing a high-efficiency thermal insulation graphene plate in order to solve the above problems, thereby solving the problems mentioned in the background technology.

[0005] In order to solve the above problems, the present invention provides a technical solution:

[0006] A method for manufacturing a high-efficiency thermal insulation graphene plate mainly comprises the following steps:

[0007] S1: Raw material preparation: First, it is necessary to prepare the required raw materials, including gelling materials, fillers, graphene, polystyrene particles, foaming agents, adhesives, water reducers and dispersants, etc. The ratio of these raw materials depends on the specific product requirements;

[0008] S2: Mixing and stirring: Mix the prepared raw materials to ensure that the various ingredients are evenly distributed, which is crucial to the performance of the final product. During the mixing process, it may be necessary to add an appropriate amount of water or other solvents to adjust the consistency of the mixture;

[0009] S3: adding graphene: adding graphene according to a predetermined ratio during the mixing and stirring process;

[0010] S4: Complete the compounding: the nano-violet light protection layer, the decorative layer, the aluminum-magnesium alloy hardness layer, the polyurethane insulation layer, and the aluminum foil anti-corrosion layer are compounded in sequence from top to bottom to form a high-efficiency thermal insulation graphene plate;

[0011] S5: Graphene sheet curing: After forming, the formed product is placed in a suitable environment for curing;

[0012] S6: Adding structure: Solve and optimize by adding carbon source repair, transmission electron microscopy and Raman spectroscopy detection, and preparation in an oxygen-free environment;

[0013] S7: Post-processing: After curing is completed, some post-processing may be required, such as cutting, grinding, etc., to obtain the final product size and appearance requirements.

[0014] As a preferred embodiment of the present invention, the mixing and stirring in S2 mainly comprises the following steps:

[0015] S21: pulping: pulping the prepared raw materials, mixing and stirring the raw materials to make them fully mixed and uniform;

[0016] S22: Transporting and stirring: transporting the prepared slurry to a slurry storage tank, and stirring it continuously during the transporting and storage process to ensure the uniformity of the slurry;

[0017] S23: stirring in the headbox: stirring is also performed in the headbox to maintain the uniformity of the slurry. As a preferred embodiment of the present invention, the addition of graphene in S3 mainly includes the following steps:

[0018] S31: Composite decorative layer: A composite decorative layer is formed on the outer surface of the aluminum-magnesium alloy hardness layer. The decorative layer may be a decorative film or a coating.

[0019] S32: adding a nano-ultraviolet light protection layer: compounding a nano-ultraviolet light protection layer on the outer surface of the decorative layer;

[0020] S33: Inner layer insulation treatment: a polyurethane insulation layer is compounded on the inner surface of the aluminum-magnesium alloy hardness layer;

[0021] S34: Add anti-corrosion layer: The inner surface of the polyurethane insulation layer is then laminated with an aluminum foil anti-corrosion layer.

[0022] As a preferred embodiment of the present invention, the compounding in S4 mainly comprises the following steps:

[0023] S41: solution mixing: dissolving graphene and polymer in their good solvents, obtaining a uniform mixed solution by ultrasound or vigorous stirring, and then obtaining a graphene polymer composite material by removing the solvent or precipitation;

[0024] S42: Melt blending: Mixing the filler with the polymer matrix at a relatively high temperature, and using vigorous mechanical stirring to achieve uniform dispersion of the filler in the matrix;

[0025] S43: In situ polymerization: The polymer monomer solution and the graphene solution are mixed, a certain catalyst is added, and polymerization is carried out under appropriate conditions (such as temperature, pH, potential).

[0026] As a preferred embodiment of the present invention, the curing of the graphene sheet in S5 mainly comprises the following steps:

[0027] S51: Extrusion molding: After the raw materials are carefully prepared, they are sent into the extruder. Under the action of high temperature and high pressure, the raw materials are plasticized and extruded into sheets;

[0028] S52: Hot pressing treatment: After extrusion molding, the plate needs to be hot pressed. During the hot pressing process, the control of temperature and time is very important, which is to ensure that the product is fully cured and to avoid quality problems caused by overheating;

[0029] S53: Surface treatment: Various methods such as scraping or hot pressing are used, and flexible selection is made according to product characteristics and customer needs.

[0030] As a preferred solution of the present invention, the structure added in S6 mainly includes the following steps:

[0031] S61: External carbon source repair: Use external carbon source to repair defects generated during the preparation of graphene by chemical vapor deposition;

[0032] S62: Transmission electron microscopy and Raman spectroscopy detection: These two methods are suitable for academic research and industry, respectively, to detect defects in graphene materials and to rationally control and utilize defects in graphene;

[0033] S63: Fabrication in an oxygen-free environment: Fabricating graphene in an oxygen-free environment can successfully bridge the gap in quality and reproducibility.

[0034] As a preferred solution of the present invention, the repair of adding an external carbon source in S61 mainly includes the following steps:

[0035] S611: Defect identification: It is necessary to perform defect detection on graphene materials to identify the types of defects (such as point defects, line defects, surface defects, etc.) and their locations;

[0036] S612: Select carbon source: Select a suitable carbon source. Common carbon sources include aliphatic hydrocarbon small molecules, aromatic molecules, etc. The carbon source needs to be able to decompose and release carbon atoms under specific conditions (such as high temperature and the presence of a catalyst);

[0037] S613: Setting repair conditions: According to the characteristics of the selected carbon source and graphene material, set appropriate repair conditions, such as temperature, pressure, atmosphere (such as inert gas protection), etc.

[0038] As a preferred embodiment of the present invention, the preparation of the anaerobic environment in S63 mainly comprises the following steps:

[0039] S631: Fluid exfoliation: Mix graphite with a specific fluid medium and exfoliate under high temperature and high pressure conditions to separate graphite layers and form graphene sheets;

[0040] S632: Dispersion stability: The graphene sheets are evenly dispersed in the medium through physical or chemical means, such as ultrasonic treatment, surfactants, etc.;

[0041] S633: Purification and screening: remove impurities and unreacted graphite by centrifugation, filtration and other methods to obtain pure graphene powder;

[0042] S634: Drying and collection: The dispersed graphene powder is subjected to a drying process, such as spray drying or freeze drying, to obtain dry graphene powder.

[0043] The beneficial effect of the present invention is that by setting up an additional structure, the defects existing in the manufacture of the high-efficiency thermal insulation graphene plate mainly include intrinsic defects and externally introduced defects. These defects can be solved and optimized through measures such as external carbon source repair, transmission electron microscopy and Raman spectroscopy detection, and preparation in an oxygen-free environment, thereby improving the quality and performance of the graphene plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] For ease of explanation, the present invention is described in detail with reference to the following specific implementations and the accompanying drawings.

[0045] Figure 1 It is a flow chart of the method for manufacturing the graphene plate of the present invention. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0047] Embodiment 1:

[0048] See also Figure 1 The present invention provides a technical solution: a method for manufacturing a high-efficiency thermal insulation graphene plate, which mainly includes the following steps:

[0049] S1: Raw material preparation: First, it is necessary to prepare the required raw materials, including gelling materials, fillers, graphene, polystyrene particles, foaming agents, adhesives, water reducers and dispersants, etc. The ratio of these raw materials depends on the specific product requirements;

[0050] S2: Mixing and stirring: Mix the prepared raw materials to ensure that the various ingredients are evenly distributed, which is crucial to the performance of the final product. During the mixing process, it may be necessary to add an appropriate amount of water or other solvents to adjust the consistency of the mixture;

[0051] S3: adding graphene: adding graphene according to a predetermined ratio during the mixing and stirring process;

[0052] S4: Complete the compounding: the nano-violet light protection layer, the decorative layer, the aluminum-magnesium alloy hardness layer, the polyurethane insulation layer, and the aluminum foil anti-corrosion layer are compounded in sequence from top to bottom to form a high-efficiency thermal insulation graphene plate;

[0053] S5: Graphene sheet curing: After forming, the formed product is placed in a suitable environment for curing;

[0054] S6: Adding structure: Solve and optimize by adding carbon source repair, transmission electron microscopy and Raman spectroscopy detection, and preparation in an oxygen-free environment;

[0055] S7: Post-processing: After curing is completed, some post-processing may be required, such as cutting, grinding, etc., to obtain the final product size and appearance requirements.

[0056] Embodiment 2:

[0057] The mixing and stirring in S2 mainly comprises the following steps:

[0058] S21: Pulping: Pulping the prepared raw materials, mixing and stirring the raw materials to make them fully mixed and keep them uniform; S22: Conveying and stirring: Conveying the prepared slurry to the slurry storage tank, and stirring it continuously during the conveying and storage process to ensure the uniformity of the slurry. This step is to prevent the slurry from settling or separating during storage and transportation; S23: Stirring in the headbox: Stirring is also performed in the headbox to maintain the uniformity of the slurry. This step is to ensure that during the molding process, the various components of the slurry can be evenly distributed, thereby ensuring the quality of the final product.

[0059] It can ensure that graphene is fully mixed with other raw materials to form a uniform slurry, providing high-quality raw materials for subsequent molding and processing. Such a mixing process is crucial to improving the performance of thermal insulation graphene sheets, including improving its thermal insulation effect, enhancing the uniformity and stability of the material, etc.

[0060] Embodiment 3:

[0061] The addition of graphene in S3 mainly includes the following steps:

[0062] S31: Composite decorative layer: A composite decorative layer is applied on the outer surface of the aluminum-magnesium alloy hardness layer. The decorative layer may be a decorative film or coating. S32: Adding a nano-ultraviolet protective layer: A composite nano-ultraviolet protective layer is applied on the outer surface of the decorative layer to provide additional protection and enhance the appearance. S33: Inner layer insulation treatment: A polyurethane thermal insulation layer is applied on the inner surface of the aluminum-magnesium alloy hardness layer to provide a good thermal insulation effect. S34: Adding an anti-corrosion layer: An aluminum foil anti-corrosion layer is applied on the inner surface of the polyurethane thermal insulation layer to improve the product's anti-corrosion performance.

[0063] It not only ensures the thermal insulation effect and energy-saving and environmental protection performance of the product, but also provides good flame retardancy and corrosion resistance, making this graphene sheet have a long service life and high practicality.

[0064] Embodiment 4:

[0065] The compounding in S4 mainly includes the following steps:

[0066] S41: Solution mixing: dissolving graphene and polymer in their good solvents, obtaining a uniform mixed solution by ultrasound or vigorous stirring, and then obtaining a graphene-polymer composite material by removing the solvent or precipitation. Solution mixing is a commonly used method for preparing graphene-polymer composite materials. It has the advantages of being simple, direct, and not requiring complex equipment, and can be prepared in large quantities, and can be widely used in industrial production; S42: Melt blending: mixing the filler with the polymer matrix at a relatively high temperature, and using vigorous mechanical stirring to achieve uniform dispersion of the filler in the matrix. Melt blending is more suitable for mixing thermally reduced graphene or exfoliated graphite with thermoplastic polymers, and is more suitable for industrial mass production than solution mixing, and effectively avoids the use of solvents, thereby achieving economic and environmental protection requirements; S43: In situ polymerization: mixing a polymer monomer solution and a graphene solution, adding a certain catalyst, and polymerizing under appropriate conditions (such as temperature, pH, and potential) to prepare high-performance graphene composite materials, but the operation is complicated and has high requirements for equipment and technology.

[0067] If large-scale production is required and economic and environmental protection are important, melt blending may be a more appropriate choice; if high-performance graphene composites need to be prepared, in situ polymerization may be more suitable. Each method has its own unique advantages and limitations, so it needs to be selected and adjusted according to specific circumstances in practical applications.

[0068] Embodiment 5:

[0069] The graphene sheet curing in S5 mainly includes the following steps:

[0070] S51: Extrusion molding: After the raw materials are carefully prepared, they are sent into the extruder. Under the action of high temperature and high pressure, the raw materials are plasticized and extruded into sheets. In order to ensure product quality and stability, the extrusion temperature and extrusion speed need to be strictly controlled, which requires the operators to have rich experience and superb skills;

[0071] S52: Hot pressing treatment: The plates after extrusion molding need to be hot pressed. During the hot pressing process, the control of temperature and time is crucial, which can not only ensure that the product is fully cured, but also avoid quality problems caused by excessive heating, and further improve the density and strength of the product, making it more stable and reliable during use; S53: Surface treatment: Use a variety of methods such as scraping or hot pressing, and flexibly choose according to product characteristics and customer needs. During the surface treatment process, the control of temperature and time is equally important, which directly affects the stability and durability of the treatment effect.

[0072] Embodiment 6:

[0073] The structure added in S6 mainly includes the following steps:

[0074] S61: Repair with external carbon source: Using external carbon source to repair defects produced during the preparation of graphene by chemical vapor deposition is a common repair method, but the mechanism of defect repair has not yet been clarified; S62: Transmission electron microscopy and Raman spectroscopy detection: These two methods are suitable for academic research and industry, respectively, and are used to detect defects in graphene materials and to rationally control and utilize graphene defects; S63: Preparation in an oxygen-free environment: Manufacturing graphene in an oxygen-free environment can successfully bridge the gap between quality and repeatability, which is of great significance to improving the performance of high-efficiency thermal insulation graphene sheets.

[0075] The defects in the manufacture of high-efficiency thermal insulation graphene sheets mainly include intrinsic defects and externally introduced defects. These defects can be solved and optimized by measures such as external carbon source repair, transmission electron microscopy and Raman spectroscopy detection, and preparation in an oxygen-free environment, thereby improving the quality and performance of graphene sheets.

[0076] Embodiment 7:

[0077] The repair of adding carbon source in S61 mainly includes the following steps:

[0078] S611: Defect identification: Graphene materials need to be defect-detected to identify the types of defects (such as point defects, line defects, surface defects, etc.) and locations; S612: Select carbon source: Select a suitable carbon source. Common carbon sources include aliphatic hydrocarbon small molecules, aromatic molecules, etc. The carbon source needs to be able to decompose and release carbon atoms under specific conditions (such as high temperature, in the presence of a catalyst); S613: Repair condition setting: According to the characteristics of the selected carbon source and graphene material, set appropriate repair conditions, such as temperature, pressure, atmosphere (such as inert gas protection), etc.

[0079] The steps of repairing with an added carbon source may vary due to different manufacturing processes and patented technologies. Therefore, in practical applications, detailed repair steps need to be formulated according to specific manufacturing processes and technical requirements. It should also be emphasized that the manufacture of high-efficiency thermal insulation graphene sheets is a comprehensive process. In addition to the performance of graphene materials, it is also necessary to consider the selection of thermal insulation materials, the optimization of composite processes, the control of molding processes and other aspects.

[0080] Embodiment 8:

[0081] The preparation of the anaerobic environment in S63 mainly includes the following steps:

[0082] S631: Fluid exfoliation: Mix graphite with a specific fluid medium and exfoliate it under high temperature and high pressure conditions to separate the graphite layers and form graphene sheets; S632: Dispersion stabilization: Use physical or chemical means, such as ultrasonic treatment, surfactants, etc., to evenly disperse the graphene sheets in the medium to prevent them from restacking; S633: Purification and screening: Remove impurities and unreacted graphite through centrifugation, filtration and other methods to obtain pure graphene powder; S634: Drying and collection: The dispersed graphene powder is subjected to a drying process, such as spray drying or freeze drying, to obtain dry graphene powder.

[0083] The high quality and stability of graphene powder are ensured, providing basic materials for the manufacture of efficient thermal insulation graphene plates. In addition, due to the high thermal conductivity of graphene, it becomes an ideal material in thermal management systems and is suitable for the manufacture of efficient thermal insulation graphene plates.

[0084] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for manufacturing a high-efficiency thermal insulation graphene plate, characterized in that: The main steps include: S1: Raw material preparation: First, it is necessary to prepare the required raw materials, including gelling materials, fillers, graphene, polystyrene particles, foaming agents, adhesives, water reducers and dispersants, etc. The ratio of these raw materials depends on the specific product requirements; S2: Mixing and stirring: Mix the prepared raw materials to ensure that the various ingredients are evenly distributed, which is crucial to the performance of the final product. During the mixing process, it may be necessary to add an appropriate amount of water or other solvents to adjust the consistency of the mixture; S3: adding graphene: adding graphene according to a predetermined ratio during the mixing and stirring process; S4: Complete the compounding: the nano-violet light protection layer, the decorative layer, the aluminum-magnesium alloy hardness layer, the polyurethane insulation layer, and the aluminum foil anti-corrosion layer are compounded from top to bottom to form a high-efficiency thermal insulation graphene plate; S5: Graphene sheet curing: After forming, the formed product is placed in a suitable environment for curing; S6: Adding structure: Solve and optimize by adding carbon source repair, transmission electron microscopy and Raman spectroscopy detection, and preparation in an oxygen-free environment; S7: Post-processing: After curing is completed, some post-processing may be required, such as cutting, grinding, etc., to obtain the final product size and appearance requirements.

2. The method for manufacturing a high-efficiency thermal insulation graphene plate according to claim 1, characterized in that: The mixing and stirring in S2 mainly comprises the following steps: S21: pulping: pulping the prepared raw materials, mixing and stirring the raw materials to make them fully mixed and uniform; S22: Transporting and stirring: transporting the prepared slurry to a slurry storage tank, and stirring it continuously during the transporting and storage process to ensure the uniformity of the slurry; S23: Stirring in the headbox: Stirring is also performed in the headbox to maintain the uniformity of the slurry.

3. The method for manufacturing a high-efficiency thermal insulation graphene plate according to claim 1, characterized in that: The addition of graphene in S3 mainly includes the following steps: S31: Composite decorative layer: A composite decorative layer is formed on the outer surface of the aluminum-magnesium alloy hardness layer. The decorative layer may be a decorative film or a coating. S32: adding a nano-ultraviolet light protection layer: compounding a nano-ultraviolet light protection layer on the outer surface of the decorative layer; S33: Inner layer insulation treatment: a polyurethane insulation layer is compounded on the inner surface of the aluminum-magnesium alloy hardness layer; S34: Add anti-corrosion layer: The inner surface of the polyurethane insulation layer is then laminated with an aluminum foil anti-corrosion layer.

4. The method for manufacturing a high-efficiency thermal insulation graphene plate according to claim 1, characterized in that: The compounding in S4 mainly includes the following steps: S41: solution mixing: dissolving graphene and polymer in their good solvents, obtaining a uniform mixed solution by ultrasound or vigorous stirring, and then obtaining a graphene polymer composite material by removing the solvent or precipitation; S42: Melt blending: Mixing the filler with the polymer matrix at a relatively high temperature, and using vigorous mechanical stirring to achieve uniform dispersion of the filler in the matrix; S43: In situ polymerization: The polymer monomer solution and the graphene solution are mixed, a certain catalyst is added, and polymerization is carried out under appropriate conditions (such as temperature, pH, potential).

5. The method for manufacturing a high-efficiency thermal insulation graphene plate according to claim 1, characterized in that: The graphene sheet curing in S5 mainly includes the following steps: S51: Extrusion molding: After the raw materials are carefully prepared, they are sent into the extruder. Under the action of high temperature and high pressure, the raw materials are plasticized and extruded into sheets; S52: Hot pressing treatment: After extrusion molding, the plate needs to be hot pressed. During the hot pressing process, the control of temperature and time is very important, which is to ensure that the product is fully cured and to avoid quality problems caused by overheating; S53: Surface treatment: Various methods such as scraping or hot pressing are used, and flexible selection is made according to product characteristics and customer needs.

6. The method for manufacturing a high-efficiency thermal insulation graphene plate according to claim 1, characterized in that: The structure added in S6 mainly includes the following steps: S61: External carbon source repair: Use external carbon source to repair defects generated during the preparation of graphene by chemical vapor deposition; S62: Transmission electron microscopy and Raman spectroscopy: These two methods are suitable for academic research and industry, respectively, to detect defects in graphene materials and to rationally control and utilize defects in graphene; S63: Fabrication in an oxygen-free environment: Fabricating graphene in an oxygen-free environment can successfully bridge the gap in quality and reproducibility.

7. The method for manufacturing a high-efficiency thermal insulation graphene plate according to claim 6, characterized in that: The repair of adding an external carbon source in S61 mainly includes the following steps: S611: Defect identification: It is necessary to perform defect detection on graphene materials to identify the types of defects (such as point defects, line defects, surface defects, etc.) and their locations; S612: Select carbon source: Select a suitable carbon source. Common carbon sources include aliphatic hydrocarbon small molecules, aromatic molecules, etc. The carbon source needs to be able to decompose and release carbon atoms under specific conditions (such as high temperature and the presence of a catalyst); S613: Setting repair conditions: According to the characteristics of the selected carbon source and graphene material, set appropriate repair conditions, such as temperature, pressure, atmosphere (such as inert gas protection), etc.

8. The method for manufacturing a high-efficiency thermal insulation graphene plate according to claim 6, characterized in that: The preparation of the anaerobic environment in S63 mainly includes the following steps: S631: Fluid exfoliation: Mix graphite with a specific fluid medium and exfoliate under high temperature and high pressure conditions to separate graphite layers and form graphene sheets; S632: Dispersion stability: The graphene sheets are uniformly dispersed in the medium through physical or chemical means, such as ultrasonic treatment, surfactants, etc.; S633: Purification and screening: remove impurities and unreacted graphite by centrifugation, filtration and other methods to obtain pure graphene powder; S634: Drying and collection: The dispersed graphene powder is subjected to a drying process, such as spray drying or freeze drying, to obtain dry graphene powder.

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