Heating element and preparation method thereof, electrically heated atomizing core and electronic cigarette

Abstract

The present application relates to a heating element and a preparation method thereof, an electric heating atomizer core and an electronic cigarette, and belongs to the technical field of electronic cigarettes. The electric heating atomizer core includes two electrodes, two conductive riveted parts and a heating element, and each electrode is fixedly connected to the heating element through a conductive riveted part. Among them, the heating element includes a wound and woven carbon fiber tow, and the surface of the single fiber of the carbon fiber tow is provided with a plurality of blind holes with a nanometer aperture. In the present application, the carbon fiber tow is wound and woven to form a heating element, and a mesh pore structure capable of absorbing and conducting oil can be formed between the tows, which can have better oil absorption and oil conducting capabilities; the surface of the single fiber of the carbon fiber tow is provided with a plurality of blind holes with a nanometer aperture, which, on the one hand, can form a good oil locking effect and is not prone to oil leakage; on the other hand, it can achieve synchronous heating and atomization while absorbing oil.

Description

Technical Field

[0001] The present application relates to the technical field of electronic cigarettes, and in particular to a heating element and a preparation method thereof, an electrically heated atomizing core and an electronic cigarette. Background Art

[0002] With the universalization of the global trend of tobacco control, new tobacco products have gradually become an important development direction of the tobacco industry due to their advantage of reducing harmful ingredients. Among them, e-cigarettes have become one of the hot spots of new tobacco products in the world.

[0003] The core component of electronic cigarettes is the atomizer core. After more than ten years of development, the atomizer core has undergone three generations of technological evolution. The first generation of technology is a glass fiber rope wrapped with a heating wire. It has been eliminated due to the problems of easy floccules, easy powder loss, and uneven heating. The second generation of technology is a resistance wire cotton core, which has the advantages of large oil storage capacity, good oil conductivity, and dense smoke, but it also has obvious disadvantages, such as the cotton core is not resistant to high temperature and easy to dry burn, the resistance wire heats the smoke oil unevenly, and it is easy to produce a burnt smell, the cotton core structure is loose, the liquid locking ability is poor, it is easy to leak oil, and the atomized molecular particles are large. The third generation of technology is a ceramic atomizer core, which has the advantages of small atomized particles, delicate taste, good consistency, and not easy to leak oil and burn.

[0004] At present, ceramic atomizer cores have gradually replaced the resistance silk cotton core, but the amount of atomized smoke from ceramic atomizer cores is small, and a burnt smell will appear when the inhalation volume is large. Summary of the invention

[0005] In view of the deficiencies in the prior art, the embodiments of the present application provide a heating element and a preparation method thereof, an electrically heated atomizer core and an electronic cigarette, and carbon fiber is used as the heating element of the electrically heated atomizer core in the electronic cigarette, which has a good heating effect.

[0006] In a first aspect, an embodiment of the present application provides a heating element, which includes a wound and woven carbon fiber tow, and a single fiber surface of the carbon fiber tow is provided with a plurality of blind holes with a pore size of nanometer level.

[0007] The heating element is formed by winding and weaving carbon fiber tows, and a mesh pore structure that can absorb and conduct oil can be formed between the tows, which can have better oil absorption and oil conduction capabilities; the surface of the single fiber of the carbon fiber tow is provided with multiple blind holes with a pore size of nanometers, which can form a good oil locking effect on the one hand, and is not prone to oil leakage; on the other hand, it can achieve synchronous heating and atomization while absorbing oil. In addition, the material of the heating element is carbon fiber, which can generate heat and conduct heat itself, so that the heating element has good thermal stability, good heat shock resistance, high reliability, basically no local overheating phenomenon, high temperature uniformity, and can avoid dry burning and burnt smell to a certain extent.

[0008] In some embodiments of the present application, the blind hole has a diameter of 10-100 nm, a depth of 10-100 nm, and a single fiber diameter of the carbon fiber tow is in the micrometer level, which can make the heating element have better oil absorption and oil conduction effects, and can better lock oil and avoid oil leakage.

[0009] In some embodiments of the present application, the specific surface area of ​​the heating element is 20-2000m 2 / g. It can make the heating surface and the smoke oil fully contact, and can significantly refine the atomized particles.

[0010] In some embodiments of the present application, the carbon fiber tow is twisted, untwisted or untwisted; the carbon fiber tow includes at least one of 1k, 3k, 6k, 12k, 24k, 60k, 120k, 360k, and 480k.

[0011] In some embodiments of the present application, the diameter of a single filament of the carbon fiber tow is 3-10 μm.

[0012] In a second aspect, an embodiment of the present application provides a method for preparing a heating element, comprising: winding and braiding carbon fiber tows into a carbon fiber braided rope, and forming blind holes on the surface of a single filament of the carbon fiber tow.

[0013] Among them, weaving can be done first and then blind holes are formed; or blind holes can be formed first and then weaving can be done. The obtained heating element can have better oil absorption and oil conduction capabilities, good oil locking effect, less prone to oil leakage, and can achieve synchronous heating atomization. In addition, the material of the heating element is carbon fiber, which can generate heat and conduct heat itself, so that the heating element has good thermal stability, heat shock resistance, high reliability, basically no local overheating phenomenon, high temperature uniformity, and can avoid dry burning and burnt smell to a certain extent.

[0014] In some embodiments of the present application, the method for forming blind holes on the surface of the single filament of the carbon fiber tow can be a chemical vapor deposition method or a gas activation method. The chemical vapor deposition method is a method of preparing blind holes by adding materials, and the gas activation method is a method of preparing blind holes by subtracting materials. Both methods can prepare nanoscale blind holes to achieve a good oil locking effect and avoid oil leakage to a certain extent.

[0015] In some embodiments of the present application, the chemical vapor deposition method includes: placing the carbon fiber bundle in a heating furnace, introducing an inert gas as a protective gas, raising the temperature to 1000-1500°C, introducing hydrogen and methane, and treating for 10-120 minutes to grow graphene nanosheets on the surface of the carbon fiber bundle, and the graphene nanosheets are overlapped to form blind holes.

[0016] Graphene nanosheets are uniformly grown on the surface of the carbon fiber tow by the chemical vapor deposition method, and the graphene nanosheets overlap each other to form a blind hole structure for oil locking.

[0017] In some embodiments of the present application, the gas activation method includes: placing the carbon fiber bundle in a heating furnace, introducing an inert gas as a protective gas, heating to 1000-1500°C, introducing water vapor and / or carbon dioxide, and treating for 10-60 minutes to form blind holes on the surface of the carbon fiber bundle.

[0018] Through the gas activation method, part of the carbon on the surface of the carbon fiber tow can be reacted with water vapor or carbon dioxide to be converted into gas, thereby forming blind holes on the surface of the carbon fiber tow.

[0019] In a third aspect, an embodiment of the present application provides an electrically heated atomizer core, comprising two electrodes, two conductive riveted parts and the above-mentioned heating element, wherein each electrode is fixedly connected to the heating element via a conductive riveted part.

[0020] The above-mentioned heating element is used in the electric heating atomizer core. A mesh-like pore structure that can absorb and conduct oil can be formed between the filament bundles, which can have better oil absorption and oil conduction capabilities; the nano-scale blind holes can form a good oil locking effect, and oil leakage is not easy to occur; it can also achieve synchronous heating and atomization while absorbing oil. In addition, the material of the heating element is carbon fiber, which can generate heat and conduct heat itself, so that the heating element has good thermal stability, heat shock resistance, high reliability, basically no local overheating phenomenon, high temperature uniformity, and can avoid dry burning and burnt smell to a certain extent.

[0021] In some embodiments of the present application, the heating element is one of spiral, linear, S-shaped, and wavy.

[0022] In some embodiments of the present application, the heating element at least includes a liquid absorption part and an atomization part connected to each other; and the conductive riveting part is arranged at the connection between the liquid absorption part and the atomization part, so as to better provide uniform current to the heating element, so that the heating element heats more evenly.

[0023] In some embodiments of the present application, the electrode is one of silver, copper, iron, aluminum, nickel, and zinc; and the conductive riveted part is one of a stainless steel sheet, a copper sheet, and an aluminum sheet.

[0024] In a fourth aspect, an embodiment of the present application provides an electronic cigarette, comprising the above-mentioned electrically heated atomizing core. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of the electrically heated atomizer core provided in an embodiment of the present application;

[0027] Figure 2 A partial cross-sectional view of a carbon fiber bundle in a heating element provided in an embodiment of the present application;

[0028] Figure 3 This is a 5K-fold scanning electron microscope photo of the heating element provided in Example 1 of the present application;

[0029] Figure 4 This is a 20K-fold scanning electron microscope photograph of the heating element provided in Example 1 of the present application.

[0030] Icons: 110 - electrode; 120 - conductive riveting part; 130 - heating element; 131 - carbon fiber tow; 132 - carbon fiber monofilament; 133 - blind hole; 134 - pore; 135 - liquid absorption part; 136 - atomization part. DETAILED DESCRIPTION

[0031] In the existing technology, the second-generation technology of the atomizer core is the resistance wire cotton core, which has the advantages of large oil storage capacity, good oil conductivity, and dense smoke volume, but also has obvious disadvantages: for example, the cotton core is not resistant to high temperature and is easy to dry burn, the resistance wire heats the e-liquid unevenly and is easy to produce a burnt smell, the cotton core structure is loose, the liquid locking ability is poor, it is easy to leak oil, and the atomized molecular particles are large.

[0032] The embodiment of the present application provides a new electrically heated atomizer core, which uses a new heating element and can improve some problems of the resistance wire cotton core. In order to make the purpose, technical solution and advantages of the embodiment of the present application clearer, the technical solution of the present application is described clearly and completely below.

[0033] Figure 1 A schematic diagram of the structure of the electrically heated atomizer core provided in an embodiment of the present application; Figure 2 This is a partial cross-sectional view of the wound and woven carbon fiber tow 131 of the heating element 130 provided in the embodiment of the present application. Figure 1 and Figure 2, the electrothermal atomization core includes two electrodes 110, two conductive riveting parts 120 and a heating element 130. Each electrode 110 is fixedly connected to the heating element 130 through a conductive riveting part 120. Among them, the heating element 130 includes a wound and woven carbon fiber filament bundle 131, and a plurality of blind holes 133 with nano-scale apertures are arranged on the surface of the single filament of the carbon fiber filament bundle 131; the single filament diameter of the carbon fiber filament bundle 131 is in the micron scale.

[0034] The carbon fiber filament bundle 131 with a single filament diameter in the micron scale is wound and woven to form the heating element 130. Pore structures 134 that can absorb and conduct oil can be formed between the filament bundles, which can have better oil absorption and oil conduction capabilities; a plurality of blind holes 133 with nano-scale apertures are arranged on the surface of the single filament of the carbon fiber filament bundle 131. On the one hand, a good oil locking effect can be formed, and the phenomenon of oil leakage is not likely to occur; on the other hand, synchronous heating and atomization can be realized while absorbing oil. Moreover, the material of the heating element is carbon fiber, which can heat and conduct heat by itself, so that the heating element has good thermal stability, heat shock resistance, high reliability, basically no local overheating phenomenon, and high temperature uniformity, and dry burning and burnt smell can be avoided to a certain extent.

[0035] Please refer to Figure 2 , after the carbon fiber filament bundles 131 are wound and woven, there are pores 134 between the carbon fiber filament bundles 131, and there are also pores 134 between the carbon fiber single filaments 132 and 132, and they cooperate with the blind holes 133 on the surface of the carbon fiber single filaments 132, so that the heating element 130 can have pore structures with different apertures, and the through holes and the blind holes 133 can be combined, thereby effectively improving the liquid absorption speed, liquid absorption capacity and liquid locking capacity of the material.

[0036] Optionally, the blind holes 133 are basically evenly distributed on the surface of the carbon fiber single filaments 132, and the apertures of the blind holes 133 are in the nano scale, and the distance between the blind holes 133 is also basically in the nano scale, so that the blind holes 133 can be evenly distributed on the surface of the carbon fiber single filaments 132, and the number of the blind holes 133 is large, which can achieve a good oil locking effect and avoid the occurrence of oil leakage.

[0037] In order to make the oil absorption and oil conduction effects of the heating element 130 better, and to be able to lock oil better and avoid the occurrence of oil leakage. The aperture of the blind hole 133 is 10 - 100 nm, the hole depth of the blind hole 133 is 10 - 100 nm, and the single filament diameter of the carbon fiber filament bundle 131 is 3 - 10 μm.

[0038] It should be noted that: there are multiple blind holes 133, and the apertures of the multiple blind holes 133 do not need to be limited to be consistent. The apertures of the blind holes 133 can be the same or different, and the apertures of the blind holes 133 can all reach the nanometer level; the depths of the multiple blind holes 133 do not need to be limited to be consistent. The depths of the blind holes 133 can be the same or different, and the depths of the blind holes 133 can all reach the nanometer level.

[0039] The diameters of the single fibers of the carbon fiber tow 131 (the diameters of the carbon fiber single fibers 132) can be the same or different, and the diameters of the single fibers can be in the micrometer level. If the diameters of the plurality of carbon fiber single fibers 132 are all the same, the heating element 130 can generate heat more evenly.

[0040] Optionally, the specific surface area of ​​the heating element 130 is 20-2000m 2 / g. The heating surface and the e-liquid can be fully contacted, and the atomized particles can be significantly refined. The specific surface area values ​​of different parts of the heating element 130 can be consistent or different. For example, the specific surface area of ​​the heating element 130 can be 20-100m 2 / g, 100-500m 2 / g, 500-1000m 2 / g or 1000-2000m 2 Or, the specific surface area of ​​a portion of the heating element 130 is 100-500m 2 / g, and the specific surface area of ​​the other heating element 130 is 500-1000m 2 / g, this application does not limit it.

[0041] In the present application, the heating element 130 is one of a spiral type, a linear type, an S type, and a wave type, so that the oil can be absorbed through the heating element 130 and the tobacco oil can be atomized.

[0042] Please continue reading Figure 1 The heating element 130 at least includes a liquid suction part 135 and an atomizing part 136 connected to each other. The liquid suction part 135 is spiral-shaped, and the atomizing part 136 is also spiral-shaped, so as to absorb oil and atomize. In another embodiment, the liquid suction part 135 may be linear and the atomizing part 136 may be spiral-shaped; or the liquid suction part 135 may be linear and the atomizing part 136 may be S-shaped; or the liquid suction part 135 may be spiral-shaped and the atomizing part 136 may be wavy-shaped, which is not limited in this application.

[0043] Optionally, the conductive riveting portion 120 is disposed at the connection between the liquid absorption portion 135 and the atomization portion 136 , which can better provide uniform current to the heating element 130 so that the heating element 130 generates heat more uniformly.

[0044] The electrode 110 may be an electrode 110 column, an electrode 110 wire or an electrode 110 sheet, etc. Optionally, the electrode 110 is one of silver, copper, iron, aluminum, nickel and zinc, so that the heating element 130 is connected to an external power source through the electrode 110.

[0045] The conductive riveted part 120 is a ring structure, which can be sleeved outside the heating element 130 and then riveted to the electrode 110. Optionally, the conductive riveted part 120 is one of a stainless steel sheet, a copper sheet, and an aluminum sheet.

[0046] The above-mentioned electrically heated atomizer core can be used to prepare electronic cigarettes, so that the heating of the electronic cigarette can be more uniform, there is basically no local overheating phenomenon, the temperature uniformity is high, and dry burning and burnt smell can be avoided to a certain extent.

[0047] After introducing the electric heating atomizer core, the preparation method of the electric heating atomizer core is introduced below. The preparation method includes:

[0048] S110, prepare the heating element 130: wind and weave the carbon fiber tow 131 into a carbon fiber braided rope. Blind holes 133 are formed on the surface of the single filaments of the carbon fiber tow 131. Among them, the carbon fiber tow 131 can be firstly wound and woven into a carbon fiber braided rope, and then the carbon fiber braided rope is formed into the main shape of the heating element 130 (for example: spiral type), and then the carbon fiber braided rope is processed to form blind holes 133 on the surface of the single filaments of the carbon fiber tow 131; or the carbon fiber tow 131 can be firstly processed to form blind holes 133 on the surface of the single filaments of the carbon fiber tow 131, and then the carbon fiber tow 131 with blind holes 133 is wound and woven into a carbon fiber braided rope, and then the carbon fiber braided rope is formed into the main shape of the heating element 130 (for example: spiral type).

[0049] Among them, after the carbon fiber bundles 131 are wound and woven into a carbon fiber braided rope, there is a certain pore 134 structure between the bundles of the carbon fiber braided rope, so that it has a certain oil absorption and oil conduction ability. The carbon fiber braided rope forms a through-hole structure similar to a "wick", which is conducive to oil absorption.

[0050] Optionally, the carbon fiber tow 131 is twisted, untwisted or untwisted; the carbon fiber tow 131 includes at least one of 1k, 3k, 6k, 12k, 24k, 60k, 120k, 360k, and 480k.

[0051] The method for forming the blind holes 133 on the surface of the single filament of the carbon fiber tow 131 can be chemical vapor deposition or gas activation. The chemical vapor deposition method is to prepare the blind holes 133 by an additive method, and the gas activation method is to prepare the blind holes 133 by a subtractive method. Both methods can prepare nanoscale blind holes 133 to achieve a good oil locking effect and avoid oil leakage to a certain extent.

[0052] In one embodiment, the chemical vapor deposition method includes: placing the carbon fiber tow 131 or the carbon fiber braided rope in a heating furnace, introducing an inert gas (e.g., argon) as a protective gas, heating to 1000-1500° C., introducing hydrogen and methane, and treating for 10-120 minutes, so that graphene nanosheets grow on the surface of the carbon fiber tow 131, and the graphene nanosheets overlap to form blind holes 133. Graphene nanosheets can be uniformly grown on the surface of the carbon fiber tow 131, and the graphene nanosheets overlap each other, thereby forming a blind hole 133 structure for oil locking.

[0053] In another embodiment, the gas activation method includes: placing the carbon fiber tow 131 in a heating furnace, introducing an inert gas (for example, argon) as a protective gas, heating to 1000-1500°C, introducing water vapor and / or carbon dioxide (water vapor, or carbon dioxide, or a mixture of water vapor and carbon dioxide), and treating for 10-60 minutes. This can allow part of the carbon on the surface of the carbon fiber tow 131 to react with water vapor or carbon dioxide to be converted into gas, thereby forming blind holes 133 on the surface of the carbon fiber tow 131 to lock in oil.

[0054] In this application, KOH or HNO 3 etc. as corrosive agents to form blind holes 133 on the surface of the carbon fiber tow 131 by acid and alkali corrosion.

[0055] S120, preparing an electrically heated atomizing core: each electrode 110 is fixedly connected to a heating element 130 via a conductive rivet 120. Optionally, the first electrode 110 is fixedly connected to one end of the heating element 130 via a conductive rivet 120; the second electrode 110 is fixedly connected to the other end of the heating element 130 via another conductive rivet 120. The two conductive rivets 120 are symmetrically distributed at the end of the heating element 130, or at any position between the end and the center.

[0056] The first electrode 110 and the second electrode 110 are connected to the positive and negative electrodes of the power supply respectively, so that the electric heating atomizer core can be quickly heated and atomized. The heating element 130 of the electric heating atomizer core has good thermal stability, thermal shock resistance, high reliability, basically no local overheating phenomenon, high temperature uniformity, and can avoid dry burning and burnt smell to a certain extent.

[0057] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to the conventional conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0058] Example 1

[0059] A method for preparing an electrically heated atomizing core comprises the following steps:

[0060] (1) A 1k twisted carbon fiber tow with a single filament diameter of 4 μm is used for winding and braiding to form a carbon fiber braided rope, and the carbon fiber braided rope is formed into a spiral shape (such as Figure 1 shape of the heating element shown).

[0061] (2) Place the spiral carbon fiber braided rope in a heating furnace, introduce argon as a protective gas, raise the temperature to 1000°C, then introduce hydrogen and methane, and perform chemical vapor deposition for 12 minutes to obtain a heating element.

[0062] (3) Use stainless steel riveting sheets to rivet the heating element and the copper wire to obtain an electric heating atomizer core.

[0063] Figure 3 This is a 5K-fold scanning electron microscope photo of the heating element provided in the embodiment of the present application; Figure 4 This is a 20K scanning electron microscope photo of the heating element provided in the embodiment of the present application. Figure 3 and Figure 4 It can be seen that graphene nanosheets that are basically perpendicular to the carbon fiber are evenly distributed on the surface of the carbon fiber. The graphene nanosheets overlap each other to form a tiny blind hole structure. The pore size of the blind holes on the surface of the carbon fiber is about 100nm.

[0064] Through the nitrogen isothermal adsorption-desorption curve test, the specific surface area of ​​the heating element provided in this embodiment is 50m 2 / g.

[0065] Example 2

[0066] A method for preparing an electrically heated atomizing core comprises the following steps:

[0067] (1) A 480k untwisted carbon fiber tow with a single filament diameter of 4 μm is used for winding and braiding to form a carbon fiber braided rope, and the carbon fiber braided rope is formed into a spiral shape (such as Figure 1 shape of the heating element shown).

[0068] (2) Place the spiral carbon fiber braided rope in a heating furnace, introduce argon gas as a protective gas, raise the temperature to 1000°C, then introduce water vapor and carbon dioxide gas, perform gas activation for 12 minutes, and obtain a heating element.

[0069] (3) Use copper rivet sheets to rivet the heating element and the silver wire to obtain an electrically heated atomizing core.

[0070] Through the nitrogen isothermal adsorption-desorption curve test, the specific surface area of ​​the heating element provided in this embodiment is 600m 2 / g.

[0071] Comparative Example 1

[0072] A method for preparing an electrically heated atomizing core comprises the following steps:

[0073] (1) A 1k twisted carbon fiber tow with a single filament diameter of 4 μm is used for winding and braiding to form a carbon fiber braided rope, and the carbon fiber braided rope is formed into a spiral shape (such as Figure 1 The heating element is formed into the shape of the heating element shown in the figure) to obtain the heating element.

[0074] (2) Use stainless steel riveting sheets to rivet the heating element and the copper wire to obtain an electric heating atomizer core.

[0075] Comparative Example 2

[0076] A method for preparing an electrically heated atomizing core comprises the following steps:

[0077] (1) A 480k untwisted carbon fiber tow with a single filament diameter of 4 μm is used for winding and braiding to form a carbon fiber braided rope, and the carbon fiber braided rope is formed into a spiral shape (such as Figure 1 The heating element is formed into the shape of the heating element shown in the figure) to obtain the heating element.

[0078] (2) Use copper rivet sheets to rivet the heating element and the silver wire to obtain an electrically heated atomizing core.

[0079] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

Claims

1. An electrically heated atomizing core, It is characterized in that It comprises two electrodes, two conductive riveting parts and a heating element, wherein each of the electrodes is fixedly connected to the heating element through one of the conductive riveting parts; The heating element comprises a wound and woven carbon fiber tow, wherein a plurality of blind holes with a nanometer-sized pore size are arranged on the surface of the single filament of the carbon fiber tow, wherein the pore size of the blind hole is 10-100 nm, the pore depth of the blind hole is 10-100 nm, the single filament diameter of the carbon fiber tow is micrometer-sized, and the specific surface area of ​​the heating element is 50-600 m 2 / g.

2. The electrically heated atomizer core according to claim 1, It is characterized in that The carbon fiber tow is one of twisted, untwisted or untwisted; the carbon fiber tow includes at least one of 1 k, 3 k, 6 k, 12 k, 24 k, 60 k, 120 k, 360 k, and 480 k; And / or, the single filament diameter of the carbon fiber tow is 3-10 μm.

3. The electrically heated atomizer core according to any one of claims 1 to 2, It is characterized in that The heating element is one of spiral, linear, S-shaped and wavy; Or / and, the heating element at least comprises a liquid absorption part and an atomization part connected to each other; the conductive riveting part is arranged at the connection between the liquid absorption part and the atomization part; Or / and, the electrode is one of silver, copper, iron, aluminum, nickel, and zinc; and the conductive riveted part is one of a stainless steel sheet, a copper sheet, and an aluminum sheet.

4. A method for preparing the electrically heated atomizer core according to any one of claims 1 to 3, It is characterized in that include: Winding and braiding the carbon fiber tows into a carbon fiber braided rope; The blind holes are formed on the surfaces of the single filaments of the carbon fiber tow.

5. The method for preparing the electrically heated atomizer core according to claim 4, It is characterized in that The method for forming the blind holes on the surface of the single filaments of the carbon fiber tow is chemical vapor deposition or gas activation.

6. The method for preparing the electrically heated atomizer core according to claim 5, It is characterized in that The chemical vapor deposition method comprises: placing the carbon fiber tow in a heating furnace, introducing an inert gas as a protective gas, heating to 1000-1500° C., introducing hydrogen and methane, and treating for 10-120 min, so that graphene nanosheets grow on the surface of the carbon fiber tow, and the graphene nanosheets overlap to form the blind hole; Alternatively, the gas activation method comprises: placing the carbon fiber tow in a heating furnace, introducing an inert gas as a protective gas, heating to 1000-1500° C., introducing water vapor and / or carbon dioxide, and treating for 10-60 min to form the blind holes on the surface of the carbon fiber tow.

7. An electronic cigarette, It is characterized in that It comprises the electrically heated atomizing core as described in any one of claims 1 to 3.

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