Liquid guide member and manufacturing method therefor, atomization core, atomizer, and electronic atomization device

Abstract

The present application relates to the technical field of aerosol generation, and provides a liquid guide member and a manufacturing method therefor, an atomization core, an atomizer, and an electronic atomization device. The liquid guide member is used in the atomization core and comprises a liquid guide substrate and a ceramic film layer; the material of the liquid guide substrate comprises a fiber; and the ceramic film layer is attached to the surface of the fiber. On the one hand, the ceramic film layer can improve the temperature resistance of the liquid guide substrate, and during heating, the ceramic film layer can reduce the risk of carbonization of the liquid guide substrate caused by heat resulting from direct contact with a heating member, thereby reducing to a certain extent or even eliminating the occurrence of charring in the liquid guide substrate. On the other hand, the ceramic film layer can reduce the corrosion damage of a liquid matrix to the liquid guide substrate. Additionally, the ceramic film layer has lipophilicity and can adsorb the oily liquid matrix, thereby increasing a liquid guide rate. In this way, the temperature resistance, the moisture resistance and the liquid guide performance of the liquid guide substrate are improved by means of the ceramic film layer.

Description

Liquid guide piece and preparation method thereof, atomizer core, atomizer and electronic atomization device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202410065685.1 and application date of January 16, 2024, and claims the priority of the above-mentioned Chinese patent application. The entire content of the above-mentioned Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the technical field of aerosol generation, and in particular to a liquid guide member and a preparation method thereof, an atomizing core, an atomizer, and an electronic atomizing device. Background Art

[0004] This section is intended to provide a background or context for the embodiments of the present application. No description herein is admitted to be prior art by virtue of its inclusion in this section.

[0005] The electronic atomization device includes an atomization core, and the atomization core includes a heating element and a liquid guide structure. The liquid guide structure guides the liquid matrix to the heating element, and the heating element heats the liquid matrix from the liquid guide structure to generate an aerosol. In the related art, the exposed cotton core is used as the liquid guide structure, and the liquid matrix and the heating element are both in contact with the cotton core. The cotton core has poor heat resistance. The heating element heats the liquid matrix to form an aerosol. The working temperature of the heating element is above 200°C. The cotton core is easily burnt during use, which is commonly known as a burnt core. During the user's puffing process, the taste of the puff in the later stage is different from that in the earlier stage. Moreover, the cotton core is easily corroded and damaged due to long-term contact with the liquid matrix, and the performance degradation causes the cotton core to become carbonized and burnt. Therefore, the cotton core in the related art has problems such as carbonization, burning, poor taste stability and consistency, and a short lifespan. Summary of the Invention

[0006] In view of this, the embodiments of the present application hope to provide a liquid-conducting part and its preparation method, an atomizing core, an atomizer and an electronic atomizing device, which can improve the corrosion resistance of liquid-conducting structures such as cotton cores and reduce the risk of burning.

[0007] To achieve the above-mentioned purpose, an embodiment of the present application provides a liquid-guiding part, which is used for an atomization core. The liquid-guiding part includes a liquid-guiding base and a ceramic film layer. The material of the liquid-guiding base includes fibers, and the ceramic film layer is attached to the surface of the fibers.

[0008] In some embodiments, the ceramic membrane layer is attached to at least a portion of the atomizing surface of the liquid-conducting substrate.

[0009] In some embodiments, the ceramic membrane layer is attached to both the outer surface and the inner surface of the liquid-conducting substrate.

[0010] In some embodiments, the material of the ceramic film layer includes at least one of oxide, nitride and carbide.

[0011] In some embodiments, the material of the ceramic film layer includes at least one of Al2O3, TiO2, SiO2, ZnO, SnO2, ZrO2, Cr2O3, Fe2O3, Ta2O5, HfO2, NiOx, AlN, TiN, SiNx, ZrN, SnN, TaNx and TiC.

[0012] In some embodiments, the thickness of the ceramic film layer is 10 nm to 10 um.

[0013] In some embodiments, the material of the liquid-conducting matrix includes at least one of cotton fiber, linen, non-woven fabric and artificial synthetic fiber.

[0014] The embodiment of the present application provides an atomizer core, comprising:

[0015] The liquid guide member described in any one of the above items;

[0016] A heating element is in contact with the liquid guiding element, and is used for heating the liquid matrix from the liquid guiding element.

[0017] The present invention provides an atomizer, comprising:

[0018] Liquid storage chamber;

[0019] In the atomizer core described above, the liquid guiding member is in liquid-conducting communication with the liquid storage chamber.

[0020] The present invention provides an electronic atomization device, comprising:

[0021] The atomizer described above;

[0022] A power supply unit is electrically connected to the heating unit.

[0023] The present application also provides a method for preparing a liquid-conducting member, including:

[0024] The liquid-conducting matrix is ​​arranged in the reaction chamber, wherein the material of the liquid-conducting matrix includes fiber;

[0025] In the reaction chamber, a ceramic membrane layer is attached to the surface of the fiber.

[0026] In some embodiments, the ceramic film layer is attached to the surface of the fiber, comprising:

[0027] The ceramic film layer is attached to the surface of the fiber by chemical vapor deposition, physical vapor deposition or atomic layer deposition.

[0028] In some embodiments, the ceramic film layer is attached to the surface of the fiber by atomic layer deposition, comprising:

[0029] The film forming step includes alternately introducing a plurality of reactants into the reaction chamber, and introducing a purge gas after each introduction of the reactants, wherein the plurality of reactants are used to form the ceramic film layer.

[0030] In some embodiments, the film forming step is performed cyclically, wherein the number of cycles of the film forming step is 50 to 1000 times.

[0031] The liquid-conducting member provided in the embodiment of the present application is subjected to an interface modification treatment on the surface of the liquid-conducting substrate, and a ceramic film layer is attached to the surface of the liquid-conducting substrate to change the temperature resistance, moisture resistance and liquid-conducting performance of the liquid-conducting substrate. The surface of the fiber of the present application is attached with a ceramic film layer. On the one hand, the ceramic film layer can improve the temperature resistance of the liquid-conducting substrate, thereby improving the stability of the fiber. During the heating process, the ceramic film layer can reduce the risk of the liquid-conducting substrate being carbonized by heat due to direct contact of the heating element with the liquid-conducting substrate, to a certain extent reducing or even eliminating the situation where the liquid-conducting substrate is scorched, thereby avoiding the problem of the fiber being scorched by heat. Moreover, the ceramic film layer is attached to the surface of the fiber, while significantly improving the temperature resistance, moisture resistance and liquid-conducting performance of the fiber, and the manufacturing process is simpler and the cost is low. The ceramic film layer is attached to the surface of the fiber, and the pores inside the fiber can still be retained. The pores of the fiber can temporarily store and circulate the liquid matrix without destroying the excellent liquid absorption properties of the fiber. The liquid-conducting member can play the role of slowly releasing the liquid matrix and thus slowly releasing the aerosol, and the aerosol release is stable and has a good taste consistency. On the other hand, the ceramic membrane layer can reduce the corrosive damage caused by the liquid matrix to the liquid-conducting substrate. Furthermore, the ceramic membrane layer is lipophilic and can absorb oily liquid matrices, thereby increasing the liquid-conducting rate. Thus, the ceramic membrane layer improves the liquid-conducting substrate's temperature resistance, moisture resistance, and liquid-conducting performance. Furthermore, the fiber is a flexible material that can be bent repeatedly without breaking, allowing the liquid-conducting element to adapt to the shape of the heating element, reducing design and manufacturing complexity. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 is a scanning electron microscope image of a cotton liquid-conducting structure in the related art;

[0033] FIG2 is a scanning electron microscope image of a liquid-conducting member in an embodiment of the present application, wherein the liquid-conducting substrate is made of cotton fiber and the ceramic membrane layer is made of aluminum oxide;

[0034] FIG3 is a graph showing the residual mass curves obtained by thermogravimetric analysis of the control group and the experimental group at 325° C., wherein Q1 is the curve of the control group and Q2 is the curve of the experimental group;

[0035] FIG4 is a bar graph of oil conduction rate obtained by conducting oil conduction performance tests on the comparison group and the experimental group, wherein P1 is the bar graph of the comparison group and P2 is the bar graph of the experimental group;

[0036] FIG5 is a flow chart of a method for preparing a liquid-guiding member in one embodiment of the present application;

[0037] FIG6 is a schematic structural diagram of an atomizer in one embodiment of the present application;

[0038] FIG7 is an exploded view of the atomizer shown in FIG6 . DETAILED DESCRIPTION

[0039] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of this application and should not be regarded as an improper restriction on this application.

[0040] In this application, "plurality" includes two or more. The unit "um" stands for micrometer. The unit "nm" stands for nanometer. The unit "°C" stands for degree Celsius. The unit "sccm" stands for standard cubic centimeter per minute, a unit of volumetric flow rate. The unit "ml" stands for milliliter.

[0041] The liquid guide 11 provided in the embodiment of the present application is used for the atomizer core 1 and the electronic atomization device of the present application. In order to make the liquid guide 11 of the present application clear, before describing the liquid guide 11 of the present application, the atomizer core 1, the atomizer 100 and the electronic atomization device of the present application are first introduced.

[0042] The present embodiment provides an atomizer core 1, which includes the liquid guide member 11 and the heater 12 according to any of the embodiments of the present application. The heater 12 is in contact with the liquid guide member 11 and is used to heat the liquid matrix from the liquid guide member 11. In other words, the heater 12 can generate heat to heat the liquid matrix in the liquid guide member 11.

[0043] In the atomizer core 1 provided in the embodiment of the present application, the heating element 12 heats the liquid matrix to form an aerosol. The aerosol is a colloidal dispersion system formed by small solid or liquid particles dispersed and suspended in a gaseous medium.

[0044] The heating element 12 may be configured to generate heat in any manner, and the heating element 12 may convert electrical energy into thermal energy. For example, the heating element 12 may be configured to generate heat in a resistive manner.

[0045] The material of the heating element 12 is not limited. For example, the heating element 12 includes but is not limited to metal and / or alloy.

[0046] The structural shape of the heating element 12 is not limited. For example, the structural shape of the heating element 12 includes but is not limited to a mesh shape, a plate shape or any other structural shape.

[0047] The liquid matrix can be an oily substance, which refers to a hydrophobic substance. Exemplarily, the liquid matrix includes a solvent and additives. Solvents include, but are not limited to, organic solvents such as propylene glycol and / or glycerol. Additives can include plant extracts and / or flavoring agents. Flavoring agents can include flavors and fragrances.

[0048] An embodiment of the present application provides an atomizer 100. Referring to Figures 6 and 7, the atomizer 100 includes a liquid storage chamber and an atomizer core 1 according to any embodiment of the present application. A liquid guide 11 is in liquid-conducting communication with the liquid storage chamber. The liquid storage chamber is used to store a liquid matrix. The liquid guide 11 is used to guide the liquid matrix in the liquid storage chamber to a heater 12. Exemplarily, the liquid guide 11 contacts the liquid matrix in the liquid storage chamber and guides it to the heater 12, which heats the liquid matrix to generate an aerosol.

[0049] For example, in one embodiment, referring to Figures 6 and 7 , an atomizer 100 includes a housing 2 and a base 3 , which together define a liquid storage chamber and an air flow channel 100a . Both ends of the air flow channel 100a can communicate with the outside world, allowing a user to inhale aerosol through the air flow channel 100a . For example, at least a portion of the atomizer core 1 is located within the air flow channel 100a , allowing the user to inhale the aerosol generated by the atomizer core 1 by carrying it with the outside air.

[0050] The present application also provides an electronic atomization device, comprising the atomizer 100 of any of the embodiments of the present application and a power supply unit electrically connected to a heater 12. The power supply unit provides electrical energy, and the heater 12 converts the electrical energy into heat energy. A user can inhale an aerosol through the electronic atomization device.

[0051] Power supply components include, but are not limited to, batteries and other devices that can provide electrical energy. Power supply components include, but are not limited to, batteries. Batteries can be disposable batteries or rechargeable batteries.

[0052] The electronic atomization device may be a handheld electronic atomization device. For example, the outline of the electronic atomization device may be roughly in the shape of a long strip. This makes it easier for the user to hold the electronic atomization device with their fingers.

[0053] Please refer to Figures 2 and 7. The liquid guiding member 11 provided in the embodiment of the present application is used for the atomizer core 1. The liquid guiding member 11 includes a liquid guiding base and a ceramic film layer. The material of the liquid guiding base includes fiber, and the ceramic film layer is attached to the surface of the fiber.

[0054] The liquid-conducting matrix is ​​made of fibers. Fibers are materials composed of continuous or discontinuous filamentous structures. Fibers are flexible and have multiple pores, at least some of which are interconnected to form channels.

[0055] The liquid-conducting matrix is ​​used to guide the liquid matrix. For example, the liquid-conducting matrix can absorb the liquid matrix through capillary force.

[0056] The ceramic film layer is a film layer formed by ceramic materials. Ceramic materials have good chemical stability, good temperature resistance and good moisture resistance. On the one hand, the ceramic film layer can improve the temperature resistance of the liquid-conducting matrix. During the heating process, the ceramic film layer can reduce the risk of the liquid-conducting matrix being carbonized by heat due to direct contact between the heating element 12 and the liquid-conducting matrix, and to a certain extent reduce or even eliminate the situation where the liquid-conducting matrix is ​​burnt. On the other hand, the ceramic film layer can reduce the corrosion damage of the liquid matrix to the liquid-conducting matrix. On the other hand, the ceramic film layer is lipophilic and can adsorb oily liquid matrices, thereby improving the liquid conduction rate.

[0057] The liquid-conducting member 11 provided in the embodiment of the present application is subjected to an interface modification treatment on the surface of the liquid-conducting substrate, and a ceramic film layer is attached to the surface of the liquid-conducting substrate to change the temperature resistance, moisture resistance and liquid-conducting performance of the liquid-conducting substrate. The surface of the fiber of the present application is attached with a ceramic film layer. On the one hand, the ceramic film layer can improve the temperature resistance of the liquid-conducting substrate, thereby improving the stability of the fiber. During the heating process, the ceramic film layer can reduce the risk of the liquid-conducting substrate being carbonized by heat due to direct contact between the heating element 12 and the liquid-conducting substrate, to a certain extent reducing or even eliminating the situation where the liquid-conducting substrate is scorched, thus avoiding the problem of the fiber being scorched by heat. Moreover, the ceramic film layer is attached to the surface of the fiber, while significantly improving the temperature resistance, moisture resistance and liquid-conducting performance of the fiber, and the manufacturing process is simpler and the cost is low. The ceramic film layer is attached to the surface of the fiber, and the pores inside the fiber can still be retained. The pores of the fiber can temporarily store and circulate the liquid matrix without destroying the excellent liquid absorption properties of the fiber. The liquid-conducting member 11 can play the role of slowly releasing the liquid matrix and thus slowly releasing the aerosol, and the aerosol release is stable and has a good taste consistency. On the other hand, the ceramic membrane layer can reduce the corrosive damage of the liquid matrix to the liquid-conducting substrate. Furthermore, the ceramic membrane layer is lipophilic and can absorb oily liquid matrices, thereby increasing the liquid-conducting rate. Thus, the ceramic membrane layer improves the liquid-conducting substrate's temperature resistance, moisture resistance, and liquid-conducting performance. Furthermore, the fiber is a flexible material that can be bent repeatedly without breaking, allowing the liquid-conducting element 11 to adapt to the shape of the heating element 12, reducing design and manufacturing complexity.

[0058] In one embodiment, the liquid-conducting matrix is ​​a flexible structure with pores. The low hardness of the liquid-conducting matrix facilitates shape change to conform to the shape of the heating element 12, reducing design and manufacturing complexity. The pores of the liquid-conducting matrix can absorb and temporarily store liquid matrix through capillary action, acting as a liquid storage and slowly releasing liquid matrix.

[0059] Fibers include, but are not limited to, natural fibers and / or synthetic fibers.

[0060] In one embodiment, the liquid-conducting matrix is ​​made of at least one of cotton fiber, flax, non-woven fabric, and synthetic fiber. In some embodiments, the liquid-conducting matrix can be cotton fiber, flax, non-woven fabric, or synthetic fiber. In other embodiments, the liquid-conducting matrix is ​​made of two or more of the following: cotton fiber, flax, non-woven fabric, and synthetic fiber. In other words, the liquid-conducting matrix is ​​a composite material.

[0061] In one embodiment, the liquid-conducting matrix is ​​made of cotton fibers. The ceramic membrane layer can enhance the antioxidant properties of the cotton liquid-conducting matrix, thereby improving its heat resistance and corrosion resistance. Cotton is composed of numerous filamentous structures interwoven together, with multiple pores. These pores can temporarily store and circulate liquid matrix. Cotton has excellent liquid absorption, storage, and conduction properties. The ceramic membrane layer is highly lipophilic, allowing the liquid-conducting element 11 to slowly release the liquid matrix and thus the aerosol. The heated aerosol has a high degree of flavor reproduction and a relatively large amount of released aerosol.

[0062] There is no limitation on the type of cotton. For example, the types of cotton include but are not limited to absorbent cotton, organic cotton, long-staple cotton or wood pulp cotton, etc.

[0063] Illustratively, in one embodiment, the material of the liquid-conducting substrate may also include non-woven fabric and / or linen, etc.

[0064] To more clearly demonstrate the liquid-conducting member 11 of the present application, a comparative experiment is provided. In this comparative experiment, a cotton liquid-conducting structure without a ceramic film layer attached serves as a control group, while a cotton liquid-conducting substrate with a ceramic film layer attached to its surface serves as an experimental group. The ceramic film layer is aluminum oxide. The cotton structures used in the control and experimental groups were sourced from the same batch. See Figure 1, which is a scanning electron micrograph of the control group. See Figure 2, which is a scanning electron micrograph of the experimental group.

[0065] The comparison and experimental groups were subjected to thermogravimetric analysis at 325°C. See Figure 3. In Figure 3, Q1 represents the curve for the comparison group, and Q2 represents the curve for the experimental group. As can be seen from Figure 3, the residual mass of the cotton liquid-conducting substrate with the ceramic membrane attached in the experimental group was higher than the residual mass of the cotton liquid-conducting structure without the ceramic membrane attached in the comparison group. Because the ceramic membrane delays oxidation and combustion of the cotton at high temperatures, the temperature resistance of the liquid-conducting member 11 in the experimental group was improved.

[0066] The above-mentioned comparison group and experimental group were tested for their oil conduction performance. Four samples from the experimental group and four samples from the comparison group were taken respectively. Each sample was cut to a size of 7mm×60mm. Each sample was compressed to a specified thickness, such as 1.1mm, by a jig. Each sample was placed in a standard environment (i.e., a temperature of 20°C and a relative humidity of 65%) for equilibrium for 24 hours. Each sample was then vertically suspended in a liquid conduction meter by a jig; the liquid matrix was apple e-liquid, wherein the nicotine content was 0mg, and the solvents were propylene glycol and glycerol, with a volume ratio of propylene glycol to glycerol of 50:50. 10ml of liquid matrix was placed on the platform of the liquid conduction meter. Slowly raise the platform of the liquid conduction meter until the lower end of the jig contacts the liquid matrix, then stop rising and start timing. As the sample weight increased over time, the weight change at 100 seconds was recorded. The average values ​​for the experimental and control groups were calculated and used as indicators of the sample's oil conduction performance, expressed in g / 100 seconds. This represents the mass of oil conducted by the sample at that time. See Figure 4. P1 is the bar graph for the control group, and P2 is the bar graph for the experimental group. As can be seen in Figure 4, the oil conduction rate of the experimental group samples was higher than that of the control group, indicating that the ceramic membrane layer improved oil conduction performance.

[0067] In one embodiment, a ceramic film layer is attached to at least a portion of the atomizing surface of the liquid-conducting substrate. The atomizing surface of the liquid-conducting substrate is the surface of the liquid-conducting substrate that contacts the heating element 12. If the liquid-conducting substrate is composed of fibers, then the surface of the fibers constituting the atomizing surface of the liquid-conducting substrate is attached to a ceramic film layer. In other words, the surface of the fibers in contact with the heating element 12 is attached to a ceramic film layer. Generally, the temperature of the atomizing surface in contact with the heating element 12 is higher than the temperature of other surfaces of the liquid-conducting substrate. The ceramic film layer attached to the atomizing surface of the liquid-conducting substrate is beneficial to prevent the fibers constituting the atomizing surface from burning.

[0068] The atomized surface of the liquid-conducting substrate can be the outer surface of the liquid-conducting substrate. In one embodiment, at least a portion of the outer surface of the liquid-conducting substrate is attached with a ceramic film layer. The outer surface of the liquid-conducting substrate is the surface surrounding the outer contour of the liquid-conducting substrate.

[0069] For example, in one embodiment, the heating element 12 is wrapped around the outside of the liquid-conducting substrate. Thus, the outer surface of the liquid-conducting substrate is an atomized surface.

[0070] 7 , taking the liquid-conducting base body as a cylinder as an example, the heating element 12 is wound around the outer periphery of the liquid-conducting base body. In other words, the outer periphery of the cylindrical liquid-conducting base body is an atomized surface.

[0071] In some embodiments, the heating element 12 can be inserted into the liquid-conducting base. In other words, the liquid-conducting base can be coated on the outside of the heating element 12. In one embodiment, the liquid-conducting base forms a heating cavity, and the heating cavity is inserted into the heating chamber. The cavity wall of the heating cavity is then an atomized surface.

[0072] In one embodiment, a ceramic film layer is attached to both the outer and inner surfaces of the liquid-conducting matrix. The outer surface of the liquid-conducting matrix is ​​the surface of the fibers located outside the liquid-conducting matrix, and the inner surface of the liquid-conducting matrix is ​​the surface of the fibers located within the liquid-conducting matrix. Exemplarily, all fibers comprising the liquid-conducting matrix have a ceramic film layer attached to their surfaces. Under heat transfer, the temperature of each part of the liquid-conducting matrix will rise with heating. The ceramic film layer attached to both the outer and inner surfaces of the liquid-conducting matrix can further reduce the risk of fiber burning inside and outside the liquid-conducting matrix, thereby improving reliability.

[0073] In one embodiment, the material of the ceramic film layer includes at least one of oxides, nitrides, and carbides. Oxides, nitrides, and carbides all have good oxidation resistance, moisture resistance, and high temperature resistance, and are suitable for preparing ceramic film layers.

[0074] In one embodiment, the material of the ceramic membrane layer includes at least one of Al2O3 (aluminum oxide), TiO2 (titanium dioxide), SiO2 (silicon dioxide), ZnO (zinc oxide), SnO2 (tin oxide), ZrO2 (zirconium dioxide), Cr2O3 (chromium oxide), Fe2O3 (iron oxide), Ta2O5 (tantalum pentoxide), HfO2 (hafnium dioxide), NiOx (nickel oxide), AlN (aluminum nitride), TiN (titanium nitride), SiNx (silicon nitride), ZrN (zirconium nitride), SnN (tin nitride), TaNx (tantalum nitride), and TiC (titanium carbide). Preferably, the material of the ceramic membrane layer includes at least one of Al2O3, TiO2, SiO2, and ZrO2. These materials all have excellent high temperature resistance and corrosion resistance, are chemically stable, and do not cause loss of the liquid-conducting properties of the liquid-conducting matrix, such as fibers.

[0075] In one embodiment, the ceramic membrane layer is a thin film layer. Exemplarily, the thickness of the ceramic membrane layer is less than 100 μm.

[0076] In one embodiment, the thickness of the ceramic film layer is 10 nm to 10 μm. Exemplarily, the thickness of the ceramic film layer is 10 nm, 20 nm, 30 nm, 50 nm, 100 nm, 1 μm, 5 μm, 8 μm, or 10 μm, etc. The moderate thickness of the ceramic film layer effectively enhances the heat resistance and liquid conduction performance of the liquid-conducting substrate without excessively increasing the weight of the liquid-conducting member 11, and also allows for reasonable cost control.

[0077] Referring to FIG. 5 , the present embodiment further provides a method for preparing a liquid guide member, the method comprising:

[0078] S100: placing a liquid-conducting matrix in a reaction chamber, wherein the liquid-conducting matrix is ​​made of fiber;

[0079] S200: In the reaction chamber, a ceramic membrane layer is attached to the surface of the fiber.

[0080] The preparation method provided in the embodiment of the present application can produce the liquid-guiding part of the present application, and has the same beneficial effects as the liquid-guiding part provided in the embodiment of the present application, which will not be repeated here.

[0081] In one embodiment, the ceramic film layer is attached to the fiber surface by vapor deposition. The reaction chamber can be a reaction chamber of a vapor deposition apparatus. Vapor deposition utilizes physical and / or chemical changes in the vapor phase to form a ceramic film layer on the fiber surface. The ceramic film layer formed by vapor deposition can be relatively thin and uniform.

[0082] Vapor deposition includes chemical vapor deposition, physical vapor deposition and atomic layer deposition.

[0083] In one embodiment, the ceramic film layer is attached to the surface of the fiber, comprising:

[0084] S210: The ceramic film layer is attached to the surface of the fiber by chemical vapor deposition, physical vapor deposition or atomic layer deposition.

[0085] Chemical Vapor Deposition (CVD) is a method of forming a ceramic film layer on the surface of a fiber through a chemical reaction.

[0086] Chemical vapor deposition includes, but is not limited to, PECVD (Plasma Enhanced Chemical Vapor Deposition), APCVE (Atmospheric Pressure Chemical Vapor Deposition), and LPCVD (Low Pressure Chemical Vapor Deposition), among others.

[0087] Physical Vapor Deposition (PVD) is a method that uses physical methods to vaporize source materials into gaseous atoms, molecules or ions, and then deposits them on the surface of fibers to form a ceramic film layer.

[0088] Physical vapor deposition includes but is not limited to vacuum evaporation coating, vacuum sputtering coating, vacuum ion coating, and the like.

[0089] Atomic layer deposition (ALD) is a method in which the source material is deposited layer by layer onto the fiber surface in the form of a single atomic film. During the ALD process, the chemical reaction of each new layer is directly linked to the previous layer, resulting in only one atomic layer being deposited per reaction.

[0090] Atomic layer deposition includes, but is not limited to, TALD (Thermal Layer Deposition), PEALD (Plasma-Enhanced Atomic Layer Deposition), and SALD (spatial Atomic Layer Deposition).

[0091] The liquid-conducting matrix has pores to meet the needs of liquid conduction. Taking fibers as an example, fibers are composed of continuous or discontinuous filamentous structures. They are not only complex in shape but also have a multi-dimensional pore structure. A ceramic film is formed on the surface of the fiber through vapor deposition such as chemical vapor deposition, physical vapor deposition, or atomic layer deposition. This allows for more precise control of the thickness of the ceramic film layer, to a certain extent avoiding problems such as excessive or incomplete adhesion of the ceramic film layer. The plated ceramic film layer has good consistency.

[0092] In one embodiment, the ceramic film layer is attached to the surface of the fiber by atomic layer deposition, comprising:

[0093] S211: A film forming step, comprising alternately introducing a plurality of reactants into the reaction chamber, and introducing a purge gas after each introduction of the reactants, wherein the plurality of reactants are used to form the ceramic film layer.

[0094] The film-forming steps are described using two reactants as an example. For ease of description, the two reactants are defined as the first reactant and the second reactant. The film-forming steps include: introducing the first reactant into the reaction chamber, followed by a primary purge gas; then introducing the second reactant into the reaction chamber, followed by a primary purge gas. This completes one film-forming step.

[0095] The following describes the film-forming steps using three reactants as an example. The three reactants are defined as the first reactant, the second reactant, and the third reactant. The film-forming steps include: introducing the first reactant into the reaction chamber, followed by a primary purge gas; introducing the second reactant into the reaction chamber, followed by a primary purge gas; and introducing the third reactant into the reaction chamber, followed by a primary purge gas. This completes one film-forming step.

[0096] In this embodiment, a plurality of reactants are used to react to form a ceramic membrane layer, and a purge gas is used to purge and remove excess reactants.

[0097] The type of purge gas is not limited, and the purge gas includes but is not limited to an inert gas.

[0098] In some embodiments, the purge gas may be used as a carrier gas to carry the reactants into the reaction chamber.

[0099] The ventilation time of each reactant can be set as needed. For example, the ventilation time of each reactant can be 1 second to 5 seconds (inclusive). The ventilation time of various reactants can be the same or different.

[0100] The flow rate of each reactant and carrier gas mixture can be set as needed. For example, the flow rate of each reactant and carrier gas mixture can be 200 sccm to 700 sccm (inclusive). The flow rates of the various reactant and carrier gas mixtures can be the same or different.

[0101] The duration of the purge gas ventilation can be set as needed. For example, the duration of the purge gas ventilation can be 10 seconds to 30 seconds (inclusive). After the reaction of various reactants, the duration of the purge gas ventilation can be the same or different.

[0102] The flow rate of the purge gas can be set as required. For example, the flow rate of the purge gas can be 500 sccm to 2000 sccm (inclusive). After the reaction of various reactants, the flow rates of the purge gas can be the same or different.

[0103] In some embodiments, the film-forming step is repeated 50 to 1000 times. Exemplarily, the film-forming step is repeated 50 times, 70 times, 100 times, 105 times, 200 times, 400 times, 500 times, 800 times, or 1000 times. The film-forming step is repeated continuously to increase the thickness of the ceramic film layer. This cycle is repeated 50 to 1000 times to form a ceramic film layer of a predetermined thickness.

[0104] Taking two types of reactants and 50 cycles as an example, the two reactants are defined as the first reactant and the second reactant, respectively. Specifically, the first reactant is introduced into the reaction chamber for the first time, a purge gas is introduced, and the second reactant is introduced into the reaction chamber for the first time, a purge gas is introduced, and the first film-forming step is completed; the first reactant is introduced into the reaction chamber for the second time, a purge gas is introduced, and the second reactant is introduced into the reaction chamber for the second time, a purge gas is introduced, and the second film-forming step is completed. The film-forming steps are repeated in this way until the first reactant is introduced into the reaction chamber for the fiftieth time, a purge gas is introduced, and the second reactant is introduced into the reaction chamber for the fiftieth time, a purge gas is introduced, and the fiftieth film-forming step is completed, forming a ceramic film layer of a preset thickness.

[0105] The preset thickness may be 10 nm to 10 um.

[0106] In some embodiments, before the film forming step, the preparation method includes:

[0107] S300: Evacuate the reaction chamber to 1.00E -3 The vacuum degree is below 100° C., and the temperature in the reaction chamber is heated to between 100° C. and 180° C. (inclusive).

[0108] The reaction chamber can be evacuated by a vacuum pump. In this way, the coating process can be carried out in a vacuum environment, which can improve the coating efficiency.

[0109] In some embodiments, after the film forming step, the preparation method includes:

[0110] S400: Adjust the temperature in the reaction chamber and increase the pressure in the reaction chamber to atmospheric pressure, and then take out the finished product after coating.

[0111] In this embodiment, the temperature in the reaction chamber can be lowered to room temperature.

[0112] For example, in some embodiments, the material of the ceramic membrane layer includes Al2O3, i.e., aluminum oxide. The two reactants can be trimethylaluminum and water, respectively, and inert gas can be used as carrier gas and purge gas. The liquid-conducting substrate can be placed in the reaction chamber first, and then the reaction chamber can be evacuated to 1.00E by a vacuum pump. -3The vacuum level is lowered to below 100°C, and the temperature within the reaction chamber is heated to between 100°C and 180°C. The film-forming steps are then repeated. The film-forming steps include: introducing trimethylaluminum into the reaction chamber under the action of a carrier gas and purging with an inert gas; then introducing water into the reaction chamber under the action of a carrier gas and purging with a purge gas. Trimethylaluminum and water are alternately introduced into the reaction chamber under the action of a carrier gas, and after each introduction of trimethylaluminum and water, the reaction chamber is purged with a purge gas. This film-forming step can be repeated 50 to 1000 times. The trimethylaluminum can be aerated for 1 second each time, and the flow rate of the trimethylaluminum and carrier gas mixture can be 500 sccm. The water can be aerated for 1 second each time, and the flow rate of the water and carrier gas mixture can be 500 sccm. After each reaction, the purge gas can be aerated for 10 seconds at a flow rate of 1000 sccm. Finally, the temperature within the reaction chamber is lowered to room temperature, the pressure within the reaction chamber is increased to atmospheric pressure, and the coated product is removed.

[0113] In the description of this application, the descriptions with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in further embodiments", or "exemplary" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine different embodiments or examples described in this application and features of different embodiments or examples, unless they are mutually inconsistent.

[0114] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application are intended to be within the scope of protection of the present application.

Claims

1. A liquid guiding member, which is used for an atomizing core. The liquid guiding member includes a liquid guiding matrix and a ceramic film layer. The material of the liquid guiding matrix includes fibers, and the ceramic film layer is attached to the surface of the fibers.

2. The liquid guiding member according to claim 1, wherein at least a part of the atomizing surface of the liquid guiding matrix is attached with the ceramic film layer.

3. The liquid guiding member according to claim 1, wherein both the outer surface and the inner surface of the liquid guiding matrix are attached with the ceramic film layer.

4. The liquid guiding member according to claim 1, wherein the material of the ceramic film layer includes at least one of oxides, nitrides and carbides.

5. The liquid guiding member according to claim 4, wherein the material of the ceramic film layer includes at least one of Al2O3, TiO2, SiO2, ZnO, SnO2, ZrO2, Cr2O3, Fe2O3, Ta2O5, HfO2, NiOx, AlN, TiN, SiNx, ZrN, SnN, TaNx and TiC.

6. The liquid guiding member according to any one of claims 1 to 5, wherein the thickness of the ceramic film layer is 10 nm to 10 μm.

7. The liquid guiding member according to claim 1, wherein the material of the liquid guiding matrix includes at least one of cotton fiber, linen, non-woven fabric and synthetic fiber.

8. An atomizing core, comprising: The liquid guiding member according to any one of claims 1 to 7; A heating member, which is in contact with the liquid guiding member and is used for heating the liquid matrix from the liquid guiding member.

9. An atomizer, comprising: A liquid storage cavity; The atomizing core according to claim 8, wherein the liquid guiding member is in liquid guiding communication with the liquid storage cavity.

10. An electronic atomization device, comprising: The atomizer according to claim 9; A power supply member, which is electrically connected to the heating member.

11. A preparation method of a liquid guiding member, comprising: Placing the liquid guiding matrix in a reaction chamber, wherein the material of the liquid guiding matrix includes fibers; In the reaction chamber, a ceramic film layer is attached to the surface of the fibers.

12. The preparation method according to claim 11, wherein the ceramic film layer is attached to the surface of the fibers, including: The ceramic film layer is attached to the surface of the fibers by chemical vapor deposition, physical vapor deposition or atomic layer deposition.

13. The preparation method according to claim 12, wherein the ceramic film layer is attached to the surface of the fibers by atomic layer deposition, including: A film forming step, including alternately introducing a plurality of reactants into the reaction chamber, and introducing a purge gas each time after introducing the reactants, wherein the plurality of reactants are used to form the ceramic film layer.

14. The preparation method according to claim 13, wherein the film forming step is cyclically implemented, The number of cycles of the film forming step is 50 to 1000 times.

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