CNT conductive rubber
By setting a flame-retardant and corrosion-resistant layer on the surface of CNT conductive rubber and combining it with a ceramic sheet structure, the performance degradation problem of CNT conductive rubber in high-temperature and corrosive media environments is solved, achieving higher safety and durability.
Patent Information
- Application Number
- CN202520243604.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-02-17
AI Technical Summary
Existing CNT conductive rubber exhibits poor flame retardancy and corrosion resistance in high-temperature and corrosive environments, affecting conductivity and potentially causing electronic equipment malfunctions.
A flame-retardant layer and a corrosion-resistant layer are provided on the outer surface of the rubber matrix, and ceramic sheets are attached to the surface to improve mechanical strength. The flame-retardant layer is composed of halogen compounds, phosphorus and nitrogen compounds or inorganic hydroxides, and the corrosion-resistant layer is a polytetrafluoroethylene, epoxy resin or alumina coating. The ceramic sheets form heat dissipation channels.
It improves the safety and corrosion resistance of materials, extends service life, enhances mechanical strength, prevents high-temperature combustion and corrosion, and ensures stable current transmission.
Smart Images
Figure CN223803201U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to conductive rubber technical field, specifically related to a CNT conductive rubber. BACKGROUND
[0002] With the rapid development of modern electronic technology, conductive rubber as a kind of composite material with conductivity and rubber elasticity has been widely used in electronic packaging, electromagnetic shielding, static discharge and other fields. Traditional conductive rubber mainly realizes the conductivity by adding metal particles, graphite or other conductive powders, but these materials often have problems such as unstable conductivity, insufficient mechanical strength or easy to be affected by environment.
[0003] In recent years, carbon nanotubes (CNT) as a new one-dimensional nanomaterial, because of its excellent conductivity, mechanical strength and chemical stability, has been widely used in the preparation of conductive composite materials. CNT conductive rubber can improve the conductivity and mechanical strength by uniformly dispersing CNT as conductive filler in the rubber matrix, while maintaining the flexibility and elasticity of rubber.
[0004] The existing CNT conductive rubber has poor flame retardance and corrosion resistance. When used in high temperature and corrosive medium environment, high temperature will weaken the interfacial bonding force between CNT and rubber matrix, affecting the conductivity; and corrosive medium may penetrate inside, corrode the rubber matrix and CNT, causing electronic equipment failure, and even causing safety accidents in serious cases. SUMMARY
[0005] To solve the above technical problems, the utility model provides a kind of CNT conductive rubber, it aims at solving the technical problems in prior art to some extent, the flame retardance and corrosion resistance of existing CNT conductive rubber are poor, when used in high temperature and corrosive medium environment, high temperature will weaken the interfacial bonding force between CNT and rubber matrix, affecting the conductivity;And corrosive medium may penetrate inside, corrode the rubber matrix and CNT, cause electronic equipment failure, and even cause safety accidents in serious cases.
[0006] The technical scheme of the utility model is as follows: a kind of CNT conductive rubber, including conductive rubber, the inside of the conductive rubber is uniformly dispersed with CNT conductive filler;
[0007] The conductive rubber includes a rubber matrix, the outer surface of the rubber matrix is provided with a flame-retardant layer, and the outer surface of the flame-retardant layer is provided with a corrosion-resistant layer.
[0008] As a preferred scheme of the CNT conductive rubber of the utility model, wherein: the outer surface of the rubber matrix is linearly equidistantly provided with a plurality of first through holes.
[0009] As a preferred scheme of the CNT conductive rubber, the upper surface of the conductive rubber is connected with a first ceramic sheet.
[0010] As a preferred scheme of the CNT conductive rubber, the lower surface of the conductive rubber is connected with a second ceramic sheet.
[0011] As a preferred scheme of the CNT conductive rubber, the first ceramic sheet and the second ceramic sheet are both linearly and equidistantly provided with a plurality of second through holes corresponding to the first through holes.
[0012] As a preferred scheme of the CNT conductive rubber, the corrosion-resistant layer is one of a polytetrafluoroethylene layer, an epoxy resin layer or an aluminum oxide coating.
[0013] As a preferred scheme of the CNT conductive rubber, the edge portion of the conductive rubber is provided with a conductive contact strip electrically connected with the CNT conductive filler inside.
[0014] The CNT conductive rubber has the following beneficial effects:
[0015] 1. In the high-temperature environment, the fire-retardant layer can effectively insulate heat and prevent the rubber matrix and the CNT conductive filler from burning or performance degradation due to high temperature, thereby improving the safety of the material.
[0016] 2. In the present application, the first ceramic sheet and the second ceramic sheet are connected with the conductive rubber, which can improve the overall mechanical strength of the CNT conductive rubber and make it able to withstand greater external force and pressure. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.
[0018] Figure 1 The structure of the present application is shown in the following figure.
[0019] Figure 2 Figure 1 is a structural front view of an embodiment of the present application;
[0020] Figure 3 Figure 2 is a structural schematic view of another embodiment of the present application;
[0021] Figure 4 Figure 3 is a structural schematic view of a first ceramic sheet in the second embodiment of the present application.
[0022] In the drawings:
[0023] 100, conductive rubber; 101, rubber matrix; 102, flame-retardant layer; 103, corrosion-resistant layer; 104, first through hole; 200, first ceramic sheet; 300, second ceramic sheet; 400, second through hole. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0025] It should be noted that all directionality indications in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directionality indications also change accordingly.
[0026] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplifying the present application, the components and settings of specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and it does not indicate the relationship between the various embodiments and / or settings discussed.
[0027] Embodiment one:
[0028] As shown in Figure 1 and Figure 2 A CNT conductive rubber, including a conductive rubber 100, and CNT conductive fillers are uniformly dispersed in the inside of the conductive rubber 100;
[0029] The conductive rubber 100 comprises a rubber matrix 101, the outer surface of the rubber matrix 101 is provided with a flame-retardant layer 102, and the outer surface of the flame-retardant layer 102 is provided with a corrosion-resistant layer 103. In a high-temperature environment, the flame-retardant layer 102 can effectively insulate heat and prevent the rubber matrix 101 and the CNT conductive filler from burning or performance degradation due to high temperature, thereby improving the safety of the material. The corrosion-resistant layer 103 effectively improves the resistance of the CNT conductive rubber to corrosive media, prevents corrosive media from penetrating into the rubber matrix 101 and the CNT conductive filler, and prevents the rubber matrix 101 and the CNT conductive filler from being corroded, thereby prolonging the service life of the CNT conductive rubber.
[0030] The flame-retardant layer 102 is composed of a polymer material containing a flame-retardant additive, which includes but is not limited to a halogen compound, a phosphorus-nitrogen compound, or an inorganic hydroxide, to provide a multi-stage flame-retardant effect.
[0031] The halogen compound will decompose to produce hydrogen halide at high temperature, which can react with active hydroxyl radicals (HO) generated during the combustion of high molecular compounds to reduce their concentration, thereby slowing down the burning speed until the flame is extinguished.
[0032] The phosphorus-nitrogen compound will form a stable phosphate or nitride layer when it burns, covering the surface of the rubber matrix 101, insulating oxygen and heat, and inhibiting the release of flammable gas to achieve the purpose of flame retardation.
[0033] The inorganic hydroxide such as magnesium hydroxide or aluminum hydroxide will decompose to produce water vapor at high temperature, absorbing heat and diluting flammable gas, and the oxide layer formed can also play a role in insulating oxygen.
[0034] The addition of the flame-retardant additive can increase the thermal decomposition temperature of the CNT conductive rubber, so that the rubber matrix 101 can still maintain structural stability at a higher temperature and is not easy to burn.
[0035] The corrosion-resistant layer 103 is one of a polytetrafluoroethylene layer, an epoxy resin layer, or an aluminum oxide coating.
[0036] The corrosion-resistant layer 103 is a polytetrafluoroethylene layer, which has extremely strong chemical stability and can resist the corrosion of various corrosive media such as strong acids, strong bases, and organic solvents. Polytetrafluoroethylene has extremely low surface energy, making it difficult for corrosive media to adhere to its surface, further enhancing its corrosion resistance. Moreover, polytetrafluoroethylene can maintain stable performance in a high-temperature environment and is not easy to decompose or deteriorate, thereby ensuring the corrosion resistance of the CNT conductive rubber in a high-temperature environment.
[0037] The corrosion-resistant layer 103 is an epoxy resin layer. The epoxy resin can be firmly adhered to the rubber matrix to form a tight protective layer, effectively isolating the corrosive medium. The epoxy resin layer has a certain strength and toughness, which can resist external mechanical impact and wear, protecting the CNT conductive filler and the rubber matrix 101 inside. The epoxy resin itself has certain chemical corrosion resistance and can resist the corrosion of various corrosive media.
[0038] The corrosion-resistant layer 103 is an aluminum oxide coating. The aluminum oxide coating has extremely high hardness and wear resistance, which can resist the corrosion of corrosive media and mechanical wear. The aluminum oxide coating can maintain stable performance at high temperatures and is not easy to fall off or deteriorate. The aluminum oxide coating can form a stable passivation film under certain conditions, further enhancing its corrosion resistance.
[0039] The outer surface of the rubber matrix 101 is linearly and equidistantly provided with a plurality of first through holes 104. The first through holes 104 can be used as heat dissipation channels, which are beneficial to the dissipation of heat inside the rubber matrix 101. In a high-temperature environment, the rubber matrix 101 will expand and contract due to thermal expansion and contraction, which may even lead to performance degradation. The arrangement of the first through holes 104 can accelerate the transfer and dissipation of heat, thereby reducing the temperature of the rubber matrix 101 and maintaining the stability of its performance.
[0040] Example two:
[0041] As shown in Figure 3 and Figure 4 , the upper surface of the conductive rubber 100 is connected with the first ceramic sheet 200, and the lower surface of the conductive rubber 100 is connected with the second ceramic sheet 300. The ceramic material has high strength and high hardness. Connecting the first ceramic sheet 200 and the second ceramic sheet 300 with the conductive rubber 100 can improve the overall mechanical strength of the CNT conductive rubber, so that it can withstand greater external force and pressure. Moreover, the wear resistance of ceramic material is better than that of rubber material, so the arrangement of the first ceramic sheet 200 and the second ceramic sheet 300 can prolong the service life of the conductive rubber 100 and reduce the performance degradation caused by wear.
[0042] The first ceramic sheet 200 and the second ceramic sheet 300 are linearly and equidistantly provided with a plurality of second through holes 400. The second through holes 400 correspond to the first through holes 104, forming a heat dissipation channel that penetrates through the entire structure. This is beneficial to accelerate the transfer and dissipation of heat, further improve the heat dissipation efficiency, and reduce the working temperature.
[0043] Example three:
[0044] The edge part of the conductive rubber 100 is provided with a conductive contact strip (not shown in the figure), which is electrically connected with the internal CNT conductive filler, and serves as a connecting bridge between the conductive rubber 100 and external circuits or elements, ensuring stable transmission of current.
[0045] It should be noted that the terms "comprising", "containing" or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or apparatus that comprises a list of elements does not only include those elements, but can also include other elements not expressly listed or inherent to such process, method, article or apparatus.
[0046] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A CNT conductive rubber comprising a conductive rubber (100), characterized by, The CNT conductive filler is uniformly dispersed in the conductive rubber (100); The conductive rubber (100) comprises a rubber matrix (101), an outer surface of the rubber matrix (101) is provided with a flame-retardant layer (102), and an outer surface of the flame-retardant layer (102) is provided with a corrosion-resistant layer (103).
2. The CNT conductive rubber of claim 1, wherein, The outer surface of the rubber matrix (101) is linearly and equidistantly provided with a plurality of first through holes (104).
3. The CNT conductive rubber of claim 1, wherein, The upper surface of the conductive rubber (100) is connected with a first ceramic sheet (200).
4. The CNT conductive rubber of claim 3, wherein, The lower surface of the conductive rubber (100) is connected with a second ceramic sheet (300).
5. The CNT conductive rubber of claim 4, wherein, The first ceramic sheet (200) and the second ceramic sheet (300) are linearly and equidistantly provided with a plurality of second through holes (400), and the second through holes (400) correspond to the first through holes (104).
6. The CNT conductive rubber of claim 1, wherein, The corrosion-resistant layer (103) is one of a polytetrafluoroethylene layer, an epoxy resin layer or an aluminum oxide coating.
7. The CNT conductive rubber of claim 1, wherein, An edge portion of the conductive rubber (100) is provided with a conductive contact strip, and the conductive contact strip is electrically connected with the CNT conductive filler in the interior.