Irradiation curing type aerosol complex and heating cigarette thereof

Abstract

The invention discloses an irradiation curing type aerosol complex and a heating cigarette thereof, the irradiation curing type aerosol complex comprises a plant-based material and mesoporous particles, and the mesoporous particles are firmly adhered to the surface of the plant-based material through an irradiation curing adhesive. The irradiation curing adhesive is cured under the irradiation of plasma or ultraviolet rays and forms stable chemical bonding with functional groups on the surface of the plant-based material, so that a composite structure with high bonding strength is constructed. According to the preparation method, the problem of particle falling in a traditional loading mode is effectively solved through an irradiation curing technology, the powder falling rate of a complex is remarkably reduced to 0.5% or below, and meanwhile harmful gas generated by thermal decomposition of an adhesive is avoided. The mesoporous particles can efficiently load an atomizing agent and a flavoring agent, and stable release of aerosol is achieved in the heating process. The complex is suitable for heating aerosol generating products such as cigarettes, and the safety of the products and the consistency of smoking experience are ensured while the aerosol generating efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of novel tobacco product technology, specifically to an irradiation-cured aerosol composite and its heated cigarette. Background Technology

[0002] In recent years, with the increasingly stringent tobacco control measures and rising consumer health awareness, new tobacco products such as heated tobacco products (HTPs) have experienced rapid development. Unlike traditional cigarettes, which produce smoke through combustion, heated cigarettes heat tobacco materials at relatively low temperatures (usually below 350°C) to generate an aerosol suitable for inhalation. This low-temperature heating method makes it difficult for the tobacco materials themselves to release sufficient aerosol, resulting in less smoke and less satisfying inhalation. Therefore, it is usually necessary to add smoke-generating agents such as glycerin and propylene glycol to the tobacco materials to supplement the aerosol.

[0003] However, heated cigarettes with added smoke-generating agents still face several key technical bottlenecks: First, the bonding between smoke-generating agents (such as glycerin) and tobacco materials mainly relies on physical impregnation or simple spraying, resulting in weak bonding. During subsequent processing, transportation, and storage, these agents are easily lost due to friction and collision (i.e., "powdering" or "agent-material separation"), leading to unstable smoke production and low utilization of active ingredients in the final product. Second, this simple physical bonding method makes it difficult to effectively control the release behavior of the smoke-generating agent. During heating, smoke-generating agents that are not firmly bonded to the tobacco material will rapidly and massively volatilize upon reaching their boiling point, causing smoke release to concentrate in the initial stage, resulting in a "burst release." In the middle and later stages of smoking, the smoke volume significantly decreases due to the premature depletion of the smoke-generating agent, making the smoke release unstable throughout the entire smoking process and affecting the continuity and satisfaction of the smoking experience.

[0004] To address these issues, several solutions have been proposed in the prior art, such as using porous materials to load smoking agents or attempting to enhance the binding through chemical means. However, these methods still have limitations: the binding force of the physically loaded porous materials remains limited, and the problem of dust shedding is not sufficiently improved; while some chemical modification methods may be complex and costly, or the introduced chemical reagents may pose potential safety risks, and may even alter the properties and flavor of the tobacco itself.

[0005] Therefore, there is an urgent need in this field to develop a novel smoke-generating material and its preparation method, which can achieve a firm and stable loading of the smoke-generating agent on plant-based raw materials without introducing complex chemical bonds. This can effectively prevent powder shedding during processing and use, and achieve controllable and slow release of the smoke-generating agent, thereby providing sufficient and stable smoke for heated cigarettes. Summary of the Invention

[0006] To achieve the above objectives, a first aspect of the present invention provides an irradiation-curable aerosol composite, the composite comprising a plant-based raw material and a composite coating fixed to the surface of the plant-based raw material by irradiation curing; the composite coating comprising solid slow-release carrier particles, a smoke generator, and a three-dimensional cross-linked network formed by an irradiable curable resin; the three-dimensional cross-linked network encapsulates and fixes the solid slow-release carrier particles and the smoke generator.

[0007] In this invention, the plant-based raw material is preferably natural tobacco material and / or reconstituted tobacco material, and its form can be sheet or shred, such as shredded tobacco. Preferably, the plant-based raw material is the flower bud and / or peduncle of a clove plant.

[0008] The mass of the composite coating is 50%-100% of the mass of the plant-based raw material, preferably 60%-70%.

[0009] In this invention, the radiation-curable resin is a key component in forming the three-dimensional network structure, and it is selected from at least one of ultraviolet (UV) curable resin, visible light curable resin, or electron beam (EB) curable resin. Preferably, the radiation-curable resin is an acrylate resin, which has high reactivity and excellent film-forming properties, and more preferably at least one of polyurethane acrylate, epoxy acrylate, and polyester acrylate. These resins can rapidly crosslink under irradiation to form a robust and resilient network, effectively encapsulating the active ingredients. Preferably, based on 100g of the composite coating, the content of the radiation-curable resin is 5-50g. If the content is less than 5g, the formed three-dimensional network is too sparse, resulting in insufficient encapsulation and fixation, and increased powder shedding rate; if the content is greater than 50g, the coating is too thick, which may affect the aerosol release efficiency and increase costs.

[0010] Preferably, based on 100g of the composite coating, the content of the irradiable curable resin is 15-25g.

[0011] To initiate or accelerate the irradiation curing process, the composite coating also includes a photoinitiator. Preferably, the mass ratio of the irradiable curable resin to the photoinitiator is 1:(0.01-0.1). This ratio ensures a balance between curing efficiency and the amount of initiator residue in the final product. Preferably, based on 100g of the composite coating, the content of the photoinitiator is 0.1-2.5g, more preferably 1-2.5g.

[0012] In this invention, the solid-state slow-release carrier particles serve as the carrier and framework for regulating the release of the smoke-generating agent. They are preferably nanomaterials selected from at least one of inorganic nanomaterials, organometallic hybrid materials, and modified natural mineral materials. Preferably, the inorganic nanomaterial is a metal-based nanomaterial, more preferably at least one of noble metal nanoparticles, transition metal oxide nanoparticles, and metal sulfide nanomaterials. For example, the noble metal nanoparticles can be selected from gold, silver, and copper nanoparticles; the transition metal oxide nanoparticles can be selected from silica, zinc oxide, titanium oxide, and aluminum oxide nanoparticles. The organometallic hybrid material can be selected from metal-organic frameworks (MOFs), metalloporphyrin nanoparticles, etc. The modified natural mineral material can be selected from nanoscale layered silicates, nano-kaolin, montmorillonite nanosheets, etc. Preferably, based on 100g of the composite coating, the content of the solid-state slow-release carrier particles is 5-60g, more preferably 9-30g. Too low a content will limit the carrying and slow-release effects; too high a content may affect the uniformity and adhesion of the coating.

[0013] Preferably, the average adsorption particle size D of the solid slow-release carrier particles is 300-2000 nm, more preferably 500-1500 nm. This particle size range is beneficial for forming a suitable pore structure between particles, facilitating resin penetration and network construction. Preferably, the specific surface area of ​​the solid slow-release carrier particles is 20-360 m². 2 / g, further preferably 60-200 m 2 / g. Preferably, the average pore size of the solid slow-release carrier particles is 0.4-60 nm, more preferably 3-40 nm. Suitable specific surface area and pore size are beneficial for efficient adsorption and loading of the smoke-generating agent.

[0014] The smoke-generating agent is selected from conventional substances in the art, such as at least one of propylene glycol, ethylene glycol, glycerin, vanillin, nicotine, etc. Glycerin and / or propylene glycol are preferred. More preferably, the smoke-generating agent is a mixture of glycerin and propylene glycol in a mass ratio of 1:0.2-4. Based on 100g of the composite coating, the content of the smoke-generating agent is 30-80g, preferably 55-72.5g.

[0015] A second aspect of the present invention provides a method for preparing the above-mentioned irradiation-cured aerosol composite, the method comprising the following steps: S1. Mix solid slow-release carrier particles, smoke generator, radiation-curable resin and photoinitiator to obtain composite slurry; S2. Apply the composite slurry to the surface of the plant-based raw material; S3. Irradiate the plant-based raw material to which the composite slurry is applied, so that the irradiable curable resin crosslinks and cures to form the composite coating, thereby obtaining the aerosol composite.

[0016] In step S1, the mixing conditions include at least: a temperature of 20-60°C and a time of 0.1-4 hours. These conditions facilitate thorough dispersion and uniform mixing of the components. The mixing process can be carried out in the presence of a diluent to adjust the viscosity of the slurry, facilitating subsequent application. The diluent can be selected from water, ethanol, acetone, etc., and its boiling point is preferably lower than that of the fumigating agent. The viscosity of the composite slurry is preferably controlled within the range of 100-5000 cP.

[0017] In step S3, the irradiation can be performed using ultraviolet light irradiation, visible light irradiation, or electron beam irradiation, depending on the selected resin type. When ultraviolet or visible light irradiation is used, the irradiation intensity is preferably 50-150 mW / cm². 2 The irradiation time is preferably 10-60 seconds. When electron beam irradiation is used, the irradiation energy is preferably 50-100 kGy. These parameters ensure that the resin is fully cross-linked and cured to form a stable network.

[0018] Preferably, the mass ratio of the solid slow-release carrier particles, the smoke-generating agent, and the radiation-curable resin is 1:(2-8):(0.5-3). This ratio range is key to achieving good coating, slow-release effect, and low powder shedding rate. Preferably, the heated cigarette, as an aerosol-forming article, includes a smoke-generating section and a filter section, the filter section being further subdivided into a support element, an aerosol cooling element, and a mouthpiece.

[0019] Heated smoking devices, used as aerosol generating apparatus, are devices that interact with the aerosol-forming matrix of an aerosol-generating product to generate aerosols. The heating method of the smoking device can utilize the principles of resistance heating, infrared heating, or electromagnetic induction heating. Resistance heating mainly includes inner core heating, outer perimeter heating, and a combination of both. Infrared heating mainly includes outer perimeter heating. The heater can also be installed within the aerosol-generating product; when the aerosol-generating product is connected to the smoking device, the heater is electrically connected to the device. The heater is preferably needle-shaped, strip-shaped, leaf-shaped, or tubular. For internal heating, mesoporous particles can be concentrated on the outermost side of the irradiated curable aerosol composite or on the cigarette paper; for external heating, mesoporous particles can be concentrated near the axis of the irradiated curable aerosol composite, thus moving them away from the heater and achieving a better sustained-release effect.

[0020] This invention, by adhering mesoporous particles to tobacco shreds, significantly avoids the common microcapsule powder shedding phenomenon in existing technologies. Furthermore, the mesoporous particles themselves are less prone to decomposition or the generation of harmful gases upon heating, thus preventing the unpredictable generation of impurities or even harmful components after heating the microcapsule wall material. For heated cigarettes, the use of irradiation-cured adhesives avoids the reduction in the integrity of tobacco shreds caused by rolling compared to pressure-sensitive adhesives, and avoids premature aerosol evaporation caused by overall high-temperature heating compared to heat-sensitive adhesives. The irradiation source can be ultraviolet light or plasma irradiation, enabling rapid curing in a short time, improving production efficiency, product consistency, and curing controllability.

[0021] Typically, curing adhesives such as all-hydrogen polysilazane require the use of initiators and / or crosslinking agents. However, in this invention, the inventors unexpectedly discovered that curing can be achieved without initiators and crosslinking agents, with comparable results. Extensive testing revealed that as long as the photocurable material contains a certain amount of Si-H or Si-N groups, it can directly react with the -OH groups on the surface of plant-based materials (especially tobacco) to form a radiation-cured polymer precursor, even without or with only a small amount of irradiation initiators and / or crosslinking agents. This allows for direct crosslinking under irradiation, forming a tobacco-smoking agent mesoporous particle composite (i.e., the radiation-cured aerosol composite of this invention). Because no or only a small amount of irradiation initiators and / or crosslinking agents are used, the residue of these substances can be avoided from producing unpredictable off-gassing or even harmful components when heated cigarettes. Attached Figure Description

[0022] The above description of the present invention and the following detailed embodiments will be better understood when read in conjunction with the accompanying drawings. It should be noted that the drawings are merely examples of the claimed technical solutions.

[0023] Figure 1 This is an electron microscope image of the tobacco surface in Example 1; Figure 2 This is an electron microscope image of the surface of tobacco shreds in Comparative Example 1; Figure 3 This is an electron microscope image of the tobacco surface in Comparative Example 2. Detailed Implementation

[0024] The detailed features and advantages of this patent are described below in the specific embodiments. The content is sufficient to enable any person skilled in the art to understand the technical content of this patent and implement it accordingly. Based on the specification, claims and drawings disclosed in this specification, a person skilled in the art can easily understand the related objectives and advantages of this patent.

[0025] To make the objectives, technical solutions, and advantages of this patent clearer, the embodiments of this patent will be described in further detail below with reference to the accompanying drawings.

[0026] I. Raw Materials The main raw materials involved in this patent are as follows: .

[0027] Example 1: Preparation of Aerosol Complex 1 S1. Weigh 0.25g of silica mesoporous spheres with an average particle size of 1000nm as solid slow-release carrier particles; prepare 3.3g of an ethanol solution containing 60wt% glycerol and propylene glycol as a fumigating agent; mix the silica mesoporous spheres with the glycerol and propylene glycol fumigating agent at 60℃ and under mechanical stirring for 1h to obtain a mixture; the mass ratio of glycerol to propylene glycol is 1:0.2, and the mass ratio of solid slow-release carrier particles to fumigating agent is 1:8; S2. Add 0.5g of UV-curable acrylic resin (purchased from Zhanxin Chemical, model EBECRYL 8413) and 0.05g of photoinitiator (purchased from BASF, model Irgacure 184) to the mixture in step S1, and mix evenly to obtain the coating solution. S3. Spray 2g of coating liquid onto the surface of 2g of tobacco shreds, and then irradiate using a UV irradiation device (wavelength 365nm, intensity 80mW / cm²). 2 Irradiation for 30 seconds was used for curing to obtain aerosol composite 1.

[0028] Example 2: Preparation of Aerosol Complex 2 S1. Weigh 0.5g of silica mesoporous spheres with an average particle size of 500nm as solid slow-release carrier particles; prepare 4g of an ethanol solution containing 50wt% glycerol and propylene glycol as a fumigating agent; mix the silica mesoporous spheres with the glycerol and propylene glycol fumigating agent at 20℃ and under mechanical stirring for 0.1h to obtain a mixture; the mass ratio of glycerol to propylene glycol is 1:4, and the mass ratio of solid slow-release carrier particles to fumigating agent is 1:4. S2. Add 0.8g of UV-curable epoxy acrylate (purchased from Changxing Chemical, model EM 265) and 0.08g of photoinitiator (Irgacure 184) to the mixture in step S1, and mix evenly to obtain the coating solution; S3. Spray 2g of coating liquid onto the surface of 2g of tobacco shreds, and then irradiate using a UV irradiation device (wavelength 365nm, intensity 100mW / cm²). 2 Irradiation for 20 seconds was used for curing to obtain aerosol composite 2.

[0029] Example 3: Preparation of aerosol complex 3 S1. Weigh 1g of silica mesoporous spheres with an average particle size of 300nm as solid slow-release carrier particles; prepare 5g of an ethanol solution containing 55wt% glycerol and propylene glycol as a fumigating agent; mix the silica mesoporous spheres with the glycerol and propylene glycol fumigating agent at 50℃ and under mechanical stirring for 24h to obtain a mixture; the mass ratio of glycerol to propylene glycol is 1:2, and the mass ratio of solid slow-release carrier particles to fumigating agent is 1:2.75; S2. Add 1.0g of electron beam cured polyurethane acrylate (purchased from Covestro, model Desmolux U100) and 0.1g of photoinitiator (purchased from BASF, model Darocur TPO) to the mixture in step S1, and mix evenly to obtain the coating solution; S3. Spray 2.5g of coating liquid onto the surface of 2.5g of tobacco shreds, and irradiate with an electron beam irradiation device (energy 80kGy) for 10s to cure, thereby obtaining aerosol composite 3.

[0030] Example 4: An aerosol composite was prepared according to the method of Example 1, except that 0.25g of silica mesoporous spheres with an average particle size of 1000nm was replaced with 0.5g of silica mesoporous spheres with an average particle size of 1000nm, thus obtaining aerosol composite 4.

[0031] Example 5: An aerosol composite was prepared according to the method of Example 1, except that 0.25g of silica mesoporous spheres with an average particle size of 1000nm was replaced with 1g of silica mesoporous spheres with an average particle size of 1000nm, thus obtaining aerosol composite 5.

[0032] Example 6: An aerosol complex was prepared according to the method of Example 2, except that the silica mesoporous spheres with an average particle size of 500 nm were replaced with an equal mass of silica mesoporous spheres with an average particle size of 300 nm. Aerosol complex 6 was obtained.

[0033] Example 7: An aerosol composite was prepared according to the method of Example 1, except that the amount of solid slow-release carrier particles was adjusted so that the mass ratio of solid slow-release carrier particles to smoke generator was 1:12, and aerosol composite 7 was obtained.

[0034] Example 8: An aerosol composite was prepared according to the method of Example 1, except that the amount of UV-curable acrylic resin used was 0.2g, and aerosol composite 8 was obtained.

[0035] Example 9: An aerosol composite was prepared according to the method of Example 1, except that the same mass of visible light curable resin (purchased from 3M, model VL-100) and corresponding photoinitiator were used, and the irradiation conditions were a wavelength of 420 nm and an intensity of 50 mW / cm². 2 The aerosol complex 9 was prepared in 60s.

[0036] Comparative Example 1: Take 2g of tobacco shreds and heat them in an oven at 120℃ for 15min. Tobacco shred sample is obtained.

[0037] Comparative Example 2: 2g of glycerin solution was directly sprayed onto the surface of 2g of tobacco shreds; the mixture was then heated in an oven at 120℃ for 15 minutes. Tobacco shred sample was obtained.

[0038] Electron micrographs of the tobacco surface in Example 1 and Comparative Examples 1-2 are shown below. Figure 1 , Figure 2 and Figure 3 .

[0039] Comparative Example 3: 0.25 g of silica mesoporous spheres with an average particle size of 1000 nm were weighed and dispersed in 5 g of 60 wt% glycerol ethanol solution. The mixture was stirred at 40 °C for 60 min to obtain a mixed solution. 2 g of the mixed solution was directly sprayed onto the surface of 2 g of tobacco shreds. The tobacco shreds were then heated in an oven at 120 °C for 15 min to obtain a tobacco shred sample.

[0040] Application experiments and performance evaluation methods I. Morphological observation under an electron microscope The composite tobacco shreds obtained from Examples 1, 2, 3, 4, 5, Comparative Examples 1, 2, and 3 were observed under a scanning electron microscope, as shown below. Figure 1-3 As shown (the scale bar in the figure is 80μm in total).

[0041] II. Safety Safety testing was conducted according to the methods outlined in the Technical Specification for Pyrolysis of Tobacco Additives YQ 1-2011, analyzing and detecting harmful components in the flue gas. A CDS5200 pyrolysis instrument and a GC6890N / 5975 gas chromatograph / mass spectrometer were used to analyze the harmful components in the pyrolysis flue gas from the tobacco prepared in the examples and comparative examples. A vertical micro-furnace was used as the autosampler for pyrolysis, employing a simple instantaneous pyrolysis method. The pyrolysis temperature was continuously increased from room temperature to 35℃-275℃ (in 1℃ increments), with a control accuracy of ±0.1℃. An HP-INNOWax column was used, with dimensions of 30m (length) × 250μm (inner diameter) × 0.25μm (film thickness). The temperature program was set to an initial temperature of 40℃, increasing to 250℃ at a rate of 5℃ / min, and holding at this temperature for 10min. The injection port temperature was set to 250℃, with a split ratio of 5:1. Helium was used as the carrier gas, with a flow rate of 1.0mL / min. The mass spectrometry parameters were set as follows: transfer line temperature was 250℃, and ionization was performed using an electron impact source (EI+). The detection mode was full scan, with a scan range of 33-500 amu. The ionization energy was 70 eV, the ion source temperature was 230℃, and the solvent delay time was 6.0 min. For the material analysis of the smoke components, a ratio of the maximum predicted contribution of any harmful component in the pyrolysis products of the substance under evaluation to the release amount of harmful components in the mainstream smoke of cigarettes to the release amount of harmful components in the mainstream smoke of reference cigarettes was considered acceptable if it was less than or equal to 15%, and unacceptable if it was greater than 15%. The test results are shown in Table 2.

[0042] III. Powder Drop Test The tobacco and cigarette paper samples from the examples and comparative examples were placed in a shaker and shaken at 250 rpm for 15 min. The samples were then poured onto the surface of black cardstock and gently shaken. Grade 1 (no white powder on the surface, i.e., powder loss rate less than 0.5%), Grade 2 (a small amount of powder on the surface, i.e., powder loss rate less than 2.5%), and Grade 3 (a large amount of powder on the surface) were all determined. The powder loss rate can be calculated using the formula (weight of white powder / total amount of mesoporous particles) after collecting and weighing the white powder on the cardstock. The test results are shown in Table 2.

[0043] IV. Smoke Test The tobacco used in the above embodiments and comparative examples was replaced with the tobacco in the iQOS (Purchased from Philip Morris International, model IQOS 3DUOS) heated cigarettes, and heated cigarettes of the same specifications were made; the tobacco in the iQOS heated cigarettes was wrapped with the cigarette paper from Example 6. Heated smoking tests were conducted in the iQOS heated smoking device.

[0044] Smoke was collected using a smoke extractor (model SG-300 rotary SIBATA), and smoke concentration was tested in a detection chamber. The smoke concentration was collected puff by puff using the ISO standard suction method and tested in a 500mL smoke dilution detection chamber. Smoke concentration is usually expressed as the concentration of pollutants in the atmosphere, in ppm. The smoke concentration at 5 minutes is considered the effectiveness of the smoke release treatment. Smoke concentrations of 0-1000 ppm are classified as Level 1; 1001-2000 ppm as Level 2; 2001-3000 ppm as Level 3; 3001-4000 ppm as Level 4; and above 4000 ppm as Level 5. The test results are shown in Table 2.

[0045] The performance evaluation methods described above were used to test Examples 1-9 and Comparative Examples 1-3, and the experimental results are as follows: .

[0046] Experimental data show that Examples 1-3, 5, 8, and 9, which employed irradiation curing technology, all achieved a Grade 1 dust loss rate (dust loss <0.5%). In stark contrast, Comparative Example 3, which lacked chemical bonding or a stable physical structure, achieved a Grade 3 dust loss rate. Notably, even under the non-preferred conditions of Example 7 (excessive smoke generator) and Example 8 (insufficient resin), the dust loss rate was only Grade 2, still significantly better than Comparative Example 3. This series of data strongly demonstrates that the three-dimensional network structure formed through irradiation curing is key to imparting high mechanical strength to the composite, thereby achieving a low dust loss rate. The fixation effect of this structure on particles transcends simple physical mixing, and its effect does not depend on specific chemical bonding.

[0047] In the smoke concentration test, the preferred examples 1-3 all reached level 3 (2001-3000 ppm), while the comparative examples 2 (not simply physically adsorbing the smoke-generating agent) and 3 (physically mixed particles) only reached level 1 and level 2, respectively. This data trend indicates that the "particle-smoke-crosslinked network" composite structure constructed in this invention does indeed effectively modulate the release of the smoke-generating agent. Particularly convincing is example 5, which formed a denser structure at a high particle content, yet the smoke concentration decreased to level 2, directly supporting the inference of "structure-regulated slow release." Example 6, however, resulted in explosive release (level 5) due to the use of small-diameter particles, thus demonstrating the importance of the synergistic effect of particle size and network structure on release behavior.

[0048] All embodiments passed the safety tests, demonstrating the general safety of this technical approach under different parameters. However, performance data revealed the limitations of the technical solution: both Embodiment 7 (excessive smoke agent ratio) and Embodiment 8 (excessive resin ratio) showed performance degradation (powder shedding rate increased to level 2). This phenomenon clearly indicates that the optimal performance of the composite depends on an appropriate ratio range between the solid support particles, the smoke agent, and the curable resin. Exceeding this range prevents the complete or effective formation of the three-dimensional network structure, leading to functional degradation.

[0049] V. Morphological Characteristics Analysis of Mesoporous Silica Spheres Three types of silica mesoporous spheres with diameters of 1000 μm, 500 μm, and 300 μm were used in the experiment. Physical adsorption tests for nitrogen and microscopic image analysis were conducted to determine their specific surface area, adsorption volume, average pore size, and particle size (typical values). The test results are shown below: .

[0050] The terminology and expressions used herein are for descriptive purposes only and this patent should not be limited to them. The use of these terms and expressions does not imply the exclusion of any illustrative and descriptive equivalent features (or parts thereof), and it should be recognized that various possible modifications should also be included within the scope of the claims. Other modifications, variations, and substitutions may also exist. Accordingly, the claims should be considered to cover all such equivalents.

[0051] Similarly, it should be noted that although this patent has been described with reference to the specific embodiments described above, those skilled in the art should recognize that the above embodiments are only used to illustrate this patent, and various equivalent changes or substitutions can be made without departing from the spirit of this patent. Therefore, any changes or modifications to the above embodiments within the essential spirit of this patent will fall within the scope of the claims of this patent.

Claims

1. An irradiation-cured aerosol composite, characterized in that, The composite comprises a plant-based raw material and a composite coating fixed to the surface of the plant-based raw material by radiation curing. The composite coating comprises solid slow-release carrier particles, a smoke-generating agent, and a radiation-curable resin. The solid slow-release carrier particles, the smoke-generating agent, and the radiation-curable resin form a three-dimensional cross-linked network, which encapsulates and fixes the solid slow-release carrier particles and the smoke-generating agent. The plant-based material is natural tobacco, reconstituted tobacco, or clove plant material, and its form is sheet or filament. The mass of the composite coating is 50%-100% of the mass of the plant-based raw material, preferably 60%-70%.

2. The irradiation-cured aerosol composite according to claim 1, characterized in that, The irradiable curable resin is selected from at least one of ultraviolet light curable resin, visible light curable resin, or electron beam curable resin; preferably, the irradiable curable resin is an acrylate resin, more preferably at least one of polyurethane acrylate, epoxy acrylate, or polyester acrylate; preferably, based on 100g of the composite coating, the content of the irradiable curable resin is 5-50g, more preferably 15-25g.

3. The irradiation-cured aerosol composite according to claim 1 or 2, characterized in that, The composite coating also includes a photoinitiator; preferably, the mass ratio of the irradiable curable resin to the photoinitiator is 1:(0.01-0.1); preferably, based on 100g of the composite coating, the content of the photoinitiator is 0.1-2.5g, more preferably 1-2.5g.

4. The irradiation-cured aerosol composite according to any one of claims 1-3, characterized in that, The solid-state slow-release carrier particles are nanocarrier materials, selected from at least one of inorganic nanocarrier materials, metal-organic hybrid materials, and modified natural mineral materials; preferably, the inorganic nanocarrier material is a metal-based nanomaterial, more preferably at least one of metal nanoparticles, transition metal oxide nanoparticles, and metal sulfide nanomaterials; the metal nanoparticles are selected from at least one of gold nanoparticles, silver nanoparticles, and copper nanoparticles; the transition metal oxide nanoparticles are selected from silica nanoparticles, zinc oxide nanoparticles, titanium oxide nanoparticles, and... At least one of the following: aluminum oxide nanoparticles; the metal sulfide nanomaterial is molybdenum disulfide nanosheets and / or zinc sulfide nanospheres; the metal-organic hybrid material is selected from at least one of metal-organic framework materials, metalloporphyrin nanoparticles, and Schiff alkali metal complexes; the modified natural mineral material is selected from at least one of nanoscale layered silicates, nano-kaolin, montmorillonite nanosheets, bio-derived porous materials, nano-diatomite, and modified attapulgite; preferably, based on 100g of the composite coating, the content of the solid slow-release carrier particles is 5-60g, preferably 9-30g.

5. The irradiation-cured aerosol composite according to any one of claims 1-4, characterized in that, The average adsorption particle size D of the solid slow-release carrier particles is 300-2000 nm, preferably 500-1500 nm; preferably, the specific surface area of ​​the solid slow-release carrier particles is 20-360 m². 2 / g, further preferably 60-200 m 2 / g; preferably, the average pore size of the solid slow-release carrier particles is 0.4-60nm, more preferably 3-40nm.

6. The irradiation-cured aerosol composite according to any one of claims 1-5, characterized in that, The smoke-generating agent is selected from at least one of propylene glycol, ethylene glycol, glycerin, vanillin, vanillic acid, vanillyl acrylate, styrene, benzaldehyde, phenylpropanol, acetophenone, nicotine, nicotinic acid, and amino acids; preferably, the smoke-generating agent is glycerin and / or propylene glycol; preferably, the smoke-generating agent is glycerin and propylene glycol, and the mass ratio of glycerin to propylene glycol is 1:0.2-4; preferably, based on 100g of the composite coating, the content of the smoke-generating agent is 30-80g, more preferably 55-72.5g.

7. A method for preparing the irradiation-cured aerosol composite as described in any one of claims 1-6, characterized in that, The method includes the following steps: S1, mixing solid slow-release carrier particles, a smoke generator, a radiation-curable resin, and a photoinitiator to obtain a composite slurry; S2, applying the composite slurry to the surface of a plant-based raw material; S3, irradiating the plant-based raw material to which the composite slurry has been applied, causing the radiation-curable resin to crosslink and cure, forming the composite coating, and obtaining the aerosol composite.

8. The method according to claim 7, characterized in that, In step S1, the mixing conditions include at least the following: temperature of 20-60℃ and time of 0.1-4h; preferably, in step S3, the irradiation is ultraviolet irradiation, visible light irradiation, or electron beam irradiation; when it is ultraviolet or visible light irradiation, the irradiation intensity is 50-150 mW / cm², and the irradiation time is 10-60 seconds; when it is electron beam irradiation, the irradiation energy is 50-100 kGy, and the irradiation time is 5-30 seconds.

9. The method according to claim 7 or 8, characterized in that, In step S1, the mixing is carried out in the presence of a diluent; the diluent is selected from at least one of water, ethanol, ethylene glycol, propylene glycol, glycerol, petroleum ether, acetone, chloroform, and xylene, and the boiling point of the diluent is lower than that of the smoking agent.

10. A heated cigarette for use in heated smoking devices, the heated cigarette comprising the irradiated curable aerosol composite as described in any one of claims 1-6.

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