Carbon nanotube film heating sheet

Abstract

The utility model discloses a carbon nanotube film heating sheet, which relates to the technical field of heating sheets and comprises a mold, a mold frame of the mold is formed by four side plates which are welded with one another, a bottom plate is integrally formed at the bottom of the mold, a carbon nanotube film is arranged in the middle of an inner cavity of the mold, and the carbon nanotube film is arranged in the middle of the inner cavity of the mold. The side of the carbon nanotube film is connected with an electrode, and meanwhile, the inner cavity of the mold and the surface of the carbon nanotube film and the electrode are coated with a thin film covering layer; and the thin film covering layer is stably adhered to the surfaces of the carbon nanotube film and the electrode through a curing process to form a packaging structure. The heating sheet provided by the scheme has excellent mechanical strength and heat-conducting property, can effectively protect the carbon nanotube film from being influenced by the external environment, and can provide a stable and reliable heating function in different scenes.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating plates, and in particular relates to a carbon nanotube film heating plate. Background Art

[0002] With the continuous advancement of technology, the demand for high-performance, lightweight, and flexible thermally conductive materials is increasing. Carbon nanotubes (CNTs) have become a research hotspot due to their unique physical and chemical properties, such as high electrical and thermal conductivity, as well as excellent mechanical strength. CNT films, in particular, show great potential in flexible electronic devices, wearable technology, and thermal management applications due to their thinness, flexibility, and ease of processing.

[0003] However, despite their numerous advantages, carbon nanotube films still face several challenges in practical application. First, carbon nanotube films have poor mechanical stability and are easily damaged by external forces. Second, carbon nanotube films are sensitive to environmental factors. Long-term exposure to air or certain conditions may cause performance degradation and shorten their service life. These issues limit the application of carbon nanotube films in certain high-performance applications.

[0004] To overcome these limitations, this approach uses encapsulation technology to enhance the overall performance of carbon nanotube films. Encapsulation not only enhances the mechanical strength and durability of carbon nanotube films but also provides additional environmental protection, preventing the adverse effects of direct contact with the outside world. Utility Model Content

[0005] The utility model aims to provide a carbon nanotube film heating sheet to solve the technical problem in the background art that the heating sheet is susceptible to mechanical damage and environmental influences, resulting in poor stability and durability.

[0006] To achieve the above-mentioned purpose, the specific technical solution of the present invention is as follows: a carbon nanotube film heating plate, including a mold, the mold is composed of four side plates welded to each other to form a mold frame, and the bottom of the mold is integrally formed with a bottom plate, and a carbon nanotube film is arranged in the middle of the inner cavity of the mold, wherein the side of the carbon nanotube film is connected to the electrode, and at the same time, the inner cavity of the mold and the surface of the carbon nanotube film and the electrode are coated with a thin film covering layer; and the thin film covering layer is stably adhered to the surface of the carbon nanotube film and the electrode through a curing process to form a packaging structure.

[0007] Preferably, one side of the carbon nanotube film and the electrode is electrically connected, wherein the one side of the carbon nanotube film and the electrode is coated with a conductive connector.

[0008] Preferably, the conductive connector is electrosilver paint, which allows the carbon nanotube film and the electrode to be in close contact, thereby increasing the conductivity of the contact position.

[0009] Preferably, one end of the electrode is electrically connected with a wire, wherein the wire is covered by a sheath.

[0010] Preferably, the thin film covering layer comprises epoxy resin film two and epoxy resin film one, wherein the epoxy resin film two is uniformly coated on the end of the base plate and forms an epoxy resin bottom film after curing, at the same time, the epoxy resin film one is coated on the end of the electrode and the carbon nanotube film and forms an epoxy resin top film after curing, so as to cover and encapsulate the carbon nanotube film and the electrode by the epoxy resin film two and the epoxy resin film one.

[0011] Preferably, the epoxy resin film two and the epoxy resin film one are made of the same material, and both are made of epoxy resin prepreg.

[0012] Preferably, the opposite side of the epoxy resin film one and the epoxy resin film two is adhered with a heat-conducting film, wherein the opposite side of the two heat-conducting films is connected with a plurality of heat-conducting columns.

[0013] Preferably, the inner surface of the heat-conducting film is penetrated by a plurality of elastic strips, and the elastic strips are used to increase the resilience of the heat-conducting film.

[0014] Preferably, the opposite side of the epoxy resin film one and the epoxy resin film two is provided with a side cutting groove, and the outer side of the epoxy resin film one and the epoxy resin film two is covered with a flexible edge band, wherein the upper and lower ends of the inner surface of the flexible edge band are integrally formed with a side insertion strip.

[0015] Preferably, the outer surface of the flexible edge band and the heat-conducting film is sleeved with an outer protective cover.

[0016] The carbon nanotube thin film heating sheet has the following advantages:

[0017] The carbon nanotube thin film heating sheet, the present application coats an epoxy resin prepreg of epoxy resin film two in the mold, then uses a curing process to cure it, then selects appropriate carbon nanotube film, and places it in the epoxy resin film two, at the same time, places the electrode and the wire in the pre-designed position, then, coats the epoxy resin film one prepreg on the carbon nanotube film, ensures that it is fully soaked and covers the entire carbon nanotube film, forms an encapsulation layer; then, the epoxy resin film one is cured by a heat curing process, so as to form a firm encapsulation structure; finally, the prepared carbon nanotube thin film heating sheet has excellent mechanical strength and heat conduction performance, can effectively protect the carbon nanotube film from the influence of the external environment, and can provide stable and reliable heating function in different scenes.

[0018] And after encapsulation, by pasting the heat-conducting film when the carbon nanotube film is solidified, the heat-conducting performance is further improved, meanwhile, under the action of the flexible side frame and the side plug, the carbon nanotube film heating sheet side edge can be encapsulated and coated to improve the appearance and stability, finally, under the coating of the outer protective cover, the insulation performance is improved while the carbon nanotube film heating sheet becomes a whole.

[0019] Finally, the carbon nanotube film heating sheet not only has the advantages of the traditional carbon nanotube film, but also further improves the mechanical strength, durability and environmental adaptability through the encapsulation technology of the epoxy resin film one and the epoxy resin film two, so as to meet more extensive industrial demands. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings used in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0021] Figure 1 It is a whole structure schematic view of the present application;

[0022] Figure 2 It is a whole structure exploded schematic view of the present application;

[0023] Figure 3 It is a carbon nanotube film, electrode, epoxy resin film one and epoxy resin film two structure exploded schematic view of the present application;

[0024] Figure 4 It is an epoxy resin film one bottom view structure schematic view of the present application;

[0025] Figure 5 It is a flexible frame, heat-conducting film and outer protective cover structure exploded schematic view of the present application;

[0026] Figure 6 It is a whole structure exploded schematic view of the present application;

[0027] Figure 7 It is an epoxy resin film one, epoxy resin film two and flexible side frame structure schematic view of the present application;

[0028] Figure 8 It is a two-group heat-conducting film structure exploded schematic view of the present application.

[0029] Marked description in the figure: 100, mold; 110, cover plate; 120, bottom plate; 200, epoxy resin film one; 210, epoxy resin film two; 230, heat conduction hole; 240, edge cutting groove; 300, carbon nanotube film; 400, wire; 410, sheath; 500, electrode; 510, conductive connecting body; 600, flexible edge band; 610, edge insertion strip; 700, heat conduction film; 710, elastic strip; 720, heat conduction column; 800, outer protective cover. DETAILED DESCRIPTION

[0030] Hereinafter, only certain exemplary embodiments are simply described. As can be appreciated by those skilled in the art, the described embodiments can be modified in various different manners without departing from the spirit or scope of the embodiments of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0031] In the description of the embodiments of the present application, it is understood that the orientation or positional relationship indicated by the terms "length", "vertical", "horizontal", "top", "bottom" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0032] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0033] In the embodiments of the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0034] The disclosure below provides many different embodiments or examples for implementing different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. In addition, the embodiments of the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0035] In order to better understand the purpose, structure and function of the present invention, the carbon nanotube film heating sheet of the present invention is further described in detail below with reference to the accompanying drawings.

[0036] Example 1

[0037] like Figures 1-4 As shown, the present invention provides a carbon nanotube thin film heater, comprising a mold 100. The mold 100 comprises four mutually welded side plates forming a mold frame, and a bottom plate 120 integrally formed at the bottom of the mold 100. The mold 100 and the bottom plate 120 cooperate to form an assembly cavity for assembling the carbon nanotube thin film heater.

[0038] A carbon nanotube film 300 is disposed in the middle of the inner cavity of the mold 100, wherein an electrode 500 is connected to the side of the carbon nanotube film 300; the side where the carbon nanotube film 300 and the electrode 500 meet is electrically connected, wherein the side where the carbon nanotube film 300 and the electrode 500 meet is coated with a conductive connector 510;

[0039] The conductive connector 510 is electrosilver paint, which allows the carbon nanotube film 300 and the electrode 500 to be in close contact, thereby increasing the conductivity of the contact position.

[0040] One end of the electrode 500 is electrically connected to a wire 400 , wherein the wire 400 is covered with a sheath 410 , and the wire 400 can be connected to a cable and a plug of an external device to form a conductive path.

[0041] At the same time, the inner cavity of the mold 100 and the surfaces of the carbon nanotube film 300 and the electrode 500 are coated with a thin film covering layer. The thin film covering layer is stably adhered to the surfaces of the carbon nanotube film 300 and the electrode 500 through a curing process to form an encapsulation structure, thereby firmly encapsulating the carbon nanotube film 300 and the electrode 500 inside.

[0042] The curing process of the thin film cover layer adopts thermal curing or ultraviolet curing.

[0043] The thin film covering layer comprises epoxy resin film two 210 and epoxy resin film one 200, and the epoxy resin film two 210 and the epoxy resin film one 200 are made of the same material, i.e. epoxy resin prepreg. The epoxy resin film two 210 is uniformly coated on the end of the bottom plate 120, and forms an epoxy resin bottom film after curing. At the same time, the epoxy resin film one 200 is coated on the end of the carbon nanotube film 300 and the electrode 500, and forms an epoxy resin top film after curing. In this way, the carbon nanotube film heating sheet is encapsulated by the epoxy resin film two 210 and the epoxy resin film one 200, and the carbon nanotube film heating sheet has excellent mechanical strength and thermal conductivity under the cooperation of the epoxy resin film one 200 and the epoxy resin film two 210, which can effectively protect the carbon nanotube film heating sheet from the external environment and provide stable and reliable heating performance in different scenarios.

[0044] Specifically, among the many available encapsulation materials, the epoxy resin film one 200 and the epoxy resin film two 210 preferably use epoxy resin material. Due to its excellent insulation performance, chemical stability and easy processability, the combination of the epoxy resin film one 200 and the epoxy resin film two 210 with the carbon nanotube film 300 not only significantly improves the physical and chemical properties of the carbon nanotube film 300, but also expands its application field without affecting its original function.

[0045] Specifically, the implementation steps of the carbon nanotube film heating sheet are as follows:

[0046] S1, selecting carbon nanotube film 300, epoxy resin film one 200 and epoxy resin film two 210: selecting appropriate carbon nanotube film 300 and epoxy resin prepreg for the epoxy resin film two 210 according to the requirements.

[0047] S2, preparing mold 100: preparing mold 100, cover plate 110 and bottom plate 120 for encapsulation, ensuring that the surface is clean and has appropriate roughness and adhesion.

[0048] S3, coating epoxy resin prepreg: coating a layer of uniform epoxy resin prepreg on the inner cavity of the mold 100 to form the epoxy resin film two 210.

[0049] S4, curing the bottom layer of epoxy resin prepreg: curing the epoxy resin film two 210 coated on the bottom layer of the mold 100 by heat curing or ultraviolet light curing process, so as to form a firm encapsulation structure.

[0050] S5, placing the electrode 500 on the epoxy resin film two 210: placing the electrode 500 directly on the epoxy resin film two 210, ensuring that it is flat on the surface of the bottom layer, coating the conductive connector 510 at the position where the carbon nanotube film 300 contacts the electrode 500, so that it is in close contact and increases the conductivity at the contact position.

[0051] S6, placing the carbon nanotube film 300 on the epoxy resin film two 210: placing the carbon nanotube film 300 directly on the epoxy resin film two 210, ensuring that it is flat on the surface of the bottom layer, using laser cutting to adjust the shape and size of the carbon nanotube film 300.

[0052] S7, coating the epoxy resin prepreg: coating the epoxy resin prepreg on the carbon nanotube film 300 to form the epoxy resin film one 200, ensuring that it is fully soaked and covers the entire carbon nanotube film 300, forming an encapsulation layer.

[0053] S8, curing the epoxy resin prepreg: curing the epoxy resin film one 200 coated on the carbon nanotube film 300 through processes such as thermal curing or ultraviolet light curing, so that it forms a firm encapsulation structure.

[0054] S9, characterization and testing: performance testing of the prepared carbon nanotube film 300, epoxy resin film one 200 and epoxy resin film two 210 encapsulation material, including thermal conductivity, mechanical properties, environmental resistance performance testing, to verify that it meets the design requirements. Through the above steps, a carbon nanotube film heating sheet can be prepared.

[0055] Specifically, the carbon nanotube film 300 as a thermal conductive material has excellent electro-thermal conversion performance, which can effectively convert electrical energy into thermal energy, with a conversion efficiency of 99%, improving the heating efficiency of the heating sheet.

[0056] The epoxy resin film one 200 and the epoxy resin film two 210 as encapsulation materials can increase the mechanical strength and stability of the heating sheet, effectively protecting the carbon nanotube film 300 from damage by the external environment and mechanical impact.

[0057] The epoxy resin film one 200 and the epoxy resin film two 210 can effectively encapsulate the carbon nanotube film 300, forming a tight encapsulation structure, improving the environmental resistance of the device, such as humidity, chemical corrosion, etc.

[0058] The epoxy resin film one 200 and the epoxy resin film two 210 are prepared into encapsulating materials by a prepreg method, and the preparation process is simple and convenient to operate, and does not need complex process steps, thereby reducing the preparation cost and production cycle. The carbon nanotube film heating sheet prepared by the method is suitable for electronic devices of different shapes and sizes, has strong scalability, and can be customized and designed according to the specific application requirements.

[0059] Embodiment 2

[0060] As Figures 5-8 shown, the above-mentioned content increases the electro-thermal conversion performance and mechanical strength of the carbon nanotube film heating sheet, and avoids damage to the carbon nanotube film in daily use, but in order to further improve the heat conduction and protection performance of the carbon nanotube film heating sheet, the opposite side of the epoxy resin film one 200 and the epoxy resin film two 210 is adhered with a heat conduction film 700, wherein the opposite side of the two heat conduction films 700 is connected with a plurality of heat conduction columns 720,

[0061] Specifically, the epoxy resin film two 210 and the epoxy resin film one 200 are provided with heat conduction holes 230 on the surfaces, wherein the heat conduction film 700 is attached to the surfaces of the epoxy resin film one 200 and the epoxy resin film two 210 before curing, so that the heat conduction columns 720 are inserted into the epoxy resin film one 200 and the epoxy resin film two 210, causing the surfaces of the epoxy resin film one 200 and the epoxy resin film two 210 to form heat conduction holes 230, and increasing the heat conduction performance of the epoxy resin film one 200 and the epoxy resin film two 210.

[0062] The inner surface of the heat conduction film 700 is provided with a plurality of elastic strips 710, and the elastic strips 710 are used to increase the resilience of the heat conduction film 700, thereby improving the strength of the whole heating sheet.

[0063] The opposite side of the epoxy resin film one 200 and the epoxy resin film two 210 is provided with a side cutting groove 240, and the outer side of the epoxy resin film one 200 and the epoxy resin film two 210 is covered with a flexible edge band 600, wherein the upper and lower ends of the inner surface of the flexible edge band 600 are integrally formed with a side insertion strip 610, and when the flexible edge band 600 is sleeved on the outer surface of the epoxy resin film one 200 and the epoxy resin film two 210, the side insertion strip 610 enters the inner cavity of the side cutting groove 240, thereby increasing the stability of the flexible edge band 600 covering the epoxy resin film one 200 and the epoxy resin film two 210;

[0064] Specifically, the end of the mold 100 is clamped with a cover plate 110, the end of the mold 100 is communicated with a pouring port, and the opposite side of the bottom plate 120 and the cover plate 110 is connected with a back-shaped strip. When the epoxy resin film one 200 and the epoxy resin film two 210 are poured in the mold 100, they are affected by the back-shaped strip on the cover plate 110 and the bottom plate 120, and finally form the edge cutting groove 240.

[0065] The outer surface of the flexible edge strip 600 and the heat-conducting film 700 is sleeved with an outer protective cover 800, and the outer protective cover 800 is used to cover the carbon nanotube film heating sheet as a whole. The outer protective cover 800 is made of insulating materials such as rubber, plastic and ceramic materials.

[0066] The working principle of the carbon nanotube film heating sheet is as follows: a layer of epoxy resin prepreg of epoxy resin film two 210 is coated in the mold 100, then a curing process is used for curing, then an appropriate carbon nanotube film 300 is selected and placed in the epoxy resin film two 210, and the electrode 500 and the wire 400 are placed in the pre-designed position, then the epoxy resin film one 200 prepreg is coated on the carbon nanotube film 300 to ensure that it is fully soaked and covers the entire carbon nanotube film 300 to form an encapsulation layer; then, the epoxy resin film one 200 is cured by a heat curing process to form a firm encapsulation structure; finally, the prepared carbon nanotube film heating sheet has excellent mechanical strength and heat conduction performance, can effectively protect the carbon nanotube film 300 from the influence of the external environment, and can provide stable and reliable heating function in different scenes; after encapsulation, the heat-conducting film 700 is attached to the carbon nanotube film 300 during curing, which further improves the heat conduction performance, and under the action of the flexible edge strip 600 and the edge insertion strip 610, the side edge of the carbon nanotube film heating sheet can be encapsulated and covered to improve its appearance and stability, and finally under the covering of the outer protective cover 800, the insulation performance is improved while the carbon nanotube film heating sheet becomes a whole. Finally, the carbon nanotube film heating sheet not only has the advantages of the traditional carbon nanotube film 300, but also improves its mechanical strength, durability and environmental adaptability through the encapsulation technology of the epoxy resin film one 200 and the epoxy resin film two 210, so as to meet the more extensive industrial needs.

[0067] It can be understood that the utility model is described through some embodiments, and the person skilled in the art knows that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the application belong to the scope protected by the utility model.

Claims

1. A carbon nanotube thin film heating sheet, characterized by: The utility model provides a carbon nanotube film encapsulation structure, including mould (100), mould (100) is by four mutual welding and form mould frame of side board, and the bottom of mould (100) is integrally formed with bottom plate (120), the middle part of the inner chamber of mould (100) is provided with carbon nanotube film (300), wherein, the side of carbon nanotube film (300) is connected with electrode (500), at the same time, the surface of the inner chamber of mould (100) and located carbon nanotube film (300) and electrode (500) are coated with film covering layer, and the film covering layer is stably adhered to the surface of carbon nanotube film (300) and electrode (500) by curing process and forms encapsulation structure.

2. The carbon nanotube thin film heating sheet according to claim 1, characterized by: One side of the junction of the carbon nanotube film (300) and the electrode (500) is electrically connected, wherein the side of the junction of the carbon nanotube film (300) and the electrode (500) is coated with a conductive connector (510).

3. The carbon nanotube thin film heating sheet according to claim 2, characterized by: The conductive connector (510) is an electro-silver paint, which allows the carbon nanotube film (300) and the electrode (500) to be in close contact and increases the conductivity of the contact position.

4. The carbon nanotube thin film heating sheet according to claim 3, characterized by: One end of the electrode (500) is electrically connected to a wire (400), wherein the wire (400) is covered with a sheath (410).

5. The carbon nanotube thin film heating sheet according to claim 4, characterized by: The film covering layer includes epoxy resin film two (210) and epoxy resin film one (200), wherein the epoxy resin film two (210) is uniformly coated on the end of the bottom plate (120) and forms an epoxy resin bottom film after curing, and at the same time, the epoxy resin film one (200) is coated on the end of the carbon nanotube film (300) and the electrode (500) and forms an epoxy resin top film after curing, so as to encapsulate the carbon nanotube film (300) and the electrode (500) by using the epoxy resin film two (210) and the epoxy resin film one (200).

6. The carbon nanotube thin film heating sheet according to claim 5, characterized by: The epoxy resin film two (210) and the epoxy resin film one (200) are made of the same material, i.e., epoxy resin prepreg.

7. The carbon nanotube thin film heating sheet according to claim 6, characterized by: The opposite sides of the epoxy resin film one (200) and the epoxy resin film two (210) are adhered to heat-conducting films (700), wherein the opposite sides of the two heat-conducting films (700) are connected to a plurality of heat-conducting columns (720).

8. The carbon nanotube thin film heating sheet according to claim 7, characterized by: The inner surfaces of the heat-conducting films (700) are penetrated by a plurality of elastic strips (710), which are used to increase the resilience of the heat-conducting films (700).

9. The carbon nanotube thin film heating sheet according to claim 8, characterized by: The opposite sides of the epoxy resin film one (200) and the epoxy resin film two (210) are provided with side cutting grooves (240), and the outer sides of the epoxy resin film one (200) and the epoxy resin film two (210) are covered with flexible side strips (600), wherein the upper and lower ends of the inner surfaces of the flexible side strips (600) are integrally provided with side insertion strips (610).

10. The carbon nanotube thin film heating sheet according to claim 9, characterized by: The outer surfaces of the flexible side strips (600) and the heat-conducting films (700) are sleeved with an outer shield (800).

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