A flavoring substance capable of targeted adsorption of phenol, preparation method thereof, and cigarette

Abstract

The present invention provides a flavoring substance capable of targeted adsorption of phenol, a preparation method thereof, and a cigarette. The flavoring substance comprises a carrier and a molecular imprinting material attached to the surface of the carrier; the carrier comprises natural plant flavoring particles; and the molecular imprinting material comprises a phenol molecular imprinting polymer. The flavoring substance provided by the present invention is added to the filter rod portion of the cigarette. During the smoking process, it can not only target the adsorption of phenol in the smoke, but also specifically give the cigarette the characteristic aroma of natural plants, thereby improving the smoke quality and the consumer's smoking experience. The raw materials used in the preparation method of the flavoring substance provided by the present invention are convenient and easy to obtain, low in cost, and suitable for industrial mass production. The cigarette provided by the present invention contains the above-mentioned flavoring substance capable of targeted adsorption of phenol.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarettes, in particular to the field of cigarette additives and preparation methods thereof, and more particularly to a flavoring substance capable of targeted adsorption of phenol, a preparation method thereof, and cigarettes. Background Art

[0002] As the public becomes increasingly concerned about smoking and health issues, how to reduce the release of harmful components in cigarette smoke has always been the focus and difficulty of research in the tobacco industry.

[0003] Phenol, present in cigarette smoke, not only negatively impacts the sensory experience of cigarettes but also has a strong irritating effect on the skin and respiratory mucosa. Therefore, reducing phenol emissions from cigarette smoke has become a key area of tobacco research. Previous studies have shown that adding functional materials to cigarette filters to adsorb harmful components in smoke is a viable approach. However, these materials indiscriminately adsorb chemical components in the smoke, resulting in a loss of aroma or the reintroduction of other unpleasant flavors. Furthermore, the high cost of some materials has limited their widespread application in cigarettes.

[0004] Molecularly imprinted polymers (MIPs), with their spatial structure and functional group arrangement complementing those of target molecules, exhibit selective recognition of imprinted molecules and their structural analogs. They have been widely used in a variety of fields, including the removal of environmentally hazardous substances, solid-phase extraction, and biosensors. While there are reports on the application of MIP in the tobacco industry, current technologies suffer from limited functionality and limited applicability. Summary of the Invention

[0005] The first technical problem to be solved by the present invention is to provide a flavoring substance that can target the adsorption of phenol. When added to the filter rod part of the cigarette, during the smoking process, it can not only target the adsorption of phenol in the smoke, but also specifically give the cigarette the characteristic aroma of natural plants, thereby improving the smoke quality and improving the consumer's smoking experience.

[0006] The second technical problem to be solved by the present invention is to provide a method for preparing the above-mentioned aroma-imparting substance capable of targeted adsorption of phenol. The raw materials used in the preparation method are readily available, low in cost, and suitable for industrial mass production.

[0007] The third technical problem addressed by the present invention is to provide a cigarette containing the aforementioned flavoring material capable of targeted phenol adsorption. When smoke passes through the flavoring material, phenol in the smoke is selectively captured by the phenol molecularly imprinted polymer on the surface of the granular flavoring material, while other chemical components are not adsorbed or adsorbed to a minimal extent, thereby preserving the original aroma of the smoke as much as possible. Furthermore, the natural plant flavoring particles included in the carrier can enhance sensory perception by imparting a safe and pleasant distinctive aroma to the smoke.

[0008] In order to solve the first technical problem mentioned above, the technical solution adopted by the invention is to provide a flavoring substance that can target and adsorb phenol, wherein the flavoring substance includes a carrier and a molecular imprinting material attached to the surface of the carrier; the carrier includes natural plant flavoring particles; the molecular imprinting material includes a phenol molecular imprinting polymer.

[0009] In the aroma material capable of targeted adsorption of phenol provided by the present invention, the natural plant aroma particles include natural plant aroma raw materials and polymers.

[0010] In the aroma-imparting substance capable of targeted adsorption of phenol provided by the present invention, the natural plant aroma raw material is obtained by extraction from natural plants, and the natural plants are selected from one or more of tamarind, hawthorn, plum, tamarind, and fig.

[0011] In the aroma-imparting substance capable of targeted adsorption of phenol provided by the present invention, the polymer is polylactic acid or polypropylene.

[0012] In the aroma-imparting substance capable of targeted adsorption of phenol provided by the present invention, raw materials for preparing the phenol molecularly imprinted polymer include phenol, methacrylic acid, azobisisobutyronitrile and ethylene glycol dimethacrylate.

[0013] To solve the second technical problem mentioned above, the technical solution adopted by the invention is to provide a method for preparing an aroma-imparting substance capable of targeted adsorption of phenol, the preparation method comprising the following steps:

[0014] Step S1, preparing natural plant fragrance raw materials using natural plants;

[0015] Step S2, using the natural plant fragrance raw material to impart fragrance to the polymer to obtain natural plant fragrance particles:

[0016] Step S3, obtaining the aroma material by in-situ polymerization using the raw materials of the natural plant aroma particles and the phenol molecularly imprinted polymer.

[0017] In the preparation method provided by the present invention, step S1 includes the following processes: placing the natural plant in a hot water bath at a certain temperature according to a certain material-liquid ratio for reflux extraction to obtain an extract; filtering the extract and concentrating it under reduced pressure to a paste to obtain an initial extract; weighing a certain amount of the initial extract, adding ethanol, shaking and dissolving it, and then centrifuging it, taking the supernatant, filtering it with a microporous filter membrane and an ultrafiltration membrane respectively, collecting the filtrate, concentrating it, and freeze-drying it to obtain a natural plant fragrance raw material.

[0018] In the preparation method provided by the present invention, step S2 includes the following process: heating a certain amount of food-grade polymer until it melts; adding the obtained natural plant fragrance raw material to the molten polymer, stirring evenly and then quickly freezing and cooling until it agglomerates to obtain a block solid with natural plant fragrance; crushing and screening the block solid to obtain natural plant fragrance particles with a particle size of 10-20 mesh.

[0019] In the preparation method provided by the present invention, step S3 includes the following process: using 10-20 mesh natural plant fragrance particles as a carrier, phenol as a template molecule, methacrylic acid as a functional monomer, azobisisobutyronitrile as an initiator, and ethylene glycol dimethacrylate as a cross-linking agent, an fragrance substance capable of targeted adsorption of phenol is obtained through an in-situ polymerization method.

[0020] To solve the third technical problem mentioned above, the technical solution adopted by the invention is to provide a cigarette, which includes a tobacco segment, a first filter segment, a cavity segment and a second filter segment connected in sequence, and the cavity segment contains the flavoring substance mentioned above.

[0021] The implementation of the present invention can achieve at least the following beneficial effects:

[0022] 1. The flavoring substance capable of targeted adsorption of phenol of the present invention is added to the filter rod part of the cigarette. During the smoking process, it can not only target the adsorption of phenol in the smoke, but also specifically give the cigarette the characteristic aroma of natural plants, thereby improving the smoke quality and improving the consumer's smoking experience.

[0023] 2. The carriers of fragrance substances include natural plant fragrance raw materials and polymers. Among them, polymers not only protect the natural plant fragrance raw materials, retain their good fragrance function, but also improve the mechanical strength and processing resistance of the fragrance substances.

[0024] 3. Fragrance substances include natural plant fragrance particles, which can give the smoke a safe and comfortable distinctive fragrance as needed to enhance sensory evaluation.

[0025] 4. The preparation method of the aroma material provided by the present invention uses readily available raw materials with low cost, and is suitable for industrial mass production.

[0026] 5. The cigarettes provided by the present invention contain the aforementioned flavoring material capable of targeted phenol adsorption. When smoke passes through the flavoring material, phenol in the smoke is selectively captured by the phenol molecularly imprinted polymer on the surface of the granular flavoring material, while other chemical components are not adsorbed or adsorbed to a minimal extent, thereby preserving the original aroma of the smoke as much as possible. Furthermore, the natural plant flavoring particles included in the carrier can enhance sensory perception by imparting a safe and pleasant distinctive aroma to the smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only embodiments of the invention. Those skilled in the art can also derive other drawings based on the provided drawings without inventive effort:

[0028] Figure 1 A schematic flow chart of the method for preparing the aroma material provided by the present invention;

[0029] Figure 2 This is a schematic structural diagram of the cigarette provided by the present invention.

[0030] Description of the accompanying drawings in the specific implementation manner:

[0031] Tobacco segments 1 First acetate filter section 2 Cavity segment 3 Second acetate filter section 4 Fragrance substances 5 DETAILED DESCRIPTION

[0032] To facilitate understanding of the invention, the invention will be described more fully below with reference to the accompanying drawings. The drawings illustrate exemplary embodiments of the invention. However, the invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive disclosure of the invention.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the invention pertains. The terms used in the specification of the invention herein are for the purpose of describing specific embodiments only and are not intended to limit the invention.

[0034] The present invention provides an aroma material carrier capable of targeted adsorption of phenol and a molecular imprinting material attached to the surface of the carrier; the carrier comprises natural plant aroma particles; and the molecular imprinting material comprises a phenol molecular imprinting polymer.

[0035] In this embodiment, the natural plant fragrance particles include natural plant fragrance raw materials and polymers, wherein the natural plant fragrance raw materials are extracted from natural plants, and the natural plants are selected from one or more of tamarind, hawthorn, plum, tamarind, and fig; the polymer is polylactic acid or polypropylene.

[0036] Of course, in some other embodiments, different types of natural plants can be selected according to different fragrance requirements. In addition, the polymer can also be other food-grade polymers.

[0037] In this example, the raw materials for preparing the phenol molecularly imprinted polymer include phenol, methacrylic acid, azobisisobutyronitrile, and ethylene glycol dimethacrylate. It should be understood that the phenol molecularly imprinted polymer can be prepared by in situ polymerization using phenol as the template molecule, methacrylic acid (MAA) as the functional monomer, azobisisobutyronitrile (AIBN) as the initiator, and ethylene glycol dimethacrylate (EGDMA) as the crosslinker.

[0038] As can be seen from the above, the flavoring material capable of targeted adsorption of phenol of the present invention is added to the filter rod part of the cigarette. During the smoking process, it can not only target the adsorption of phenol in the smoke, but also specifically give the cigarette the characteristic aroma of natural plants, thereby improving the quality of the smoke and improving the consumer's smoking experience. In addition, the carrier of the flavoring material includes natural plant fragrance raw materials and polymers, wherein the polymer not only plays a protective role on the natural plant fragrance raw materials, retains its good flavoring function, but also improves the mechanical strength and processing resistance of the flavoring material. Furthermore, the flavoring material includes natural plant fragrance particles, which can give the smoke a safe and comfortable characteristic fragrance as needed.

[0039] See also Figure 1 , Figure 1 The schematic diagram of the process for preparing the aroma material provided by the present invention is as follows: Figure 1 As shown, the preparation method generally includes the following steps: step S1, using natural plants to prepare natural plant fragrance raw materials; step S2, using the natural plant fragrance raw materials to fragrance the polymer to obtain natural plant fragrance particles; step S3, using the natural plant fragrance particles and the preparation raw materials of phenol molecular imprinting polymer to obtain the fragrance substance through in situ polymerization.

[0040] In this embodiment, step S1 includes the following process:

[0041] Step S11, placing the natural plant in a hot water bath at a certain temperature according to a certain material-liquid ratio for reflux extraction to obtain an extract; filtering the extract and concentrating it under reduced pressure to a paste to obtain an initial extract; it should be noted that the material-liquid ratio is the mass ratio of the natural plant to the solution in the hot water bath; here, the material-liquid ratio is preferably between 1:3 and 1:2, the solution in the hot water bath is preferably an ethanol-water solution with a volume fraction of 20% to 30%, the hot water bath temperature is preferably 40° C.-60° C., the reflux extraction time is preferably 1 hour-3 hours, and the number of reflux extractions is preferably 2 times;

[0042] Step S12, weighing a certain amount of initial extract, adding ethanol, shaking and dissolving, and then centrifuging, taking the supernatant, filtering with a microporous filter membrane and an ultrafiltration membrane respectively, collecting the filtrate, concentrating and freeze-drying to obtain a natural plant fragrance raw material.

[0043] In this embodiment, step S2 includes the following process: heating a certain amount of food-grade polymer until it is melted; adding the obtained natural plant fragrance raw material to the molten polymer, stirring evenly and then quickly freezing and cooling to agglomerates to obtain a natural plant fragrance block solid, where the mass ratio of polymer to natural plant fragrance raw material is preferably 10:1; crushing and sieving the block solid to obtain natural plant fragrance particles with a particle size of 10-20 mesh.

[0044] In this embodiment, step S3 includes the following process: using 10-20 mesh natural plant fragrance particles as a carrier, phenol as a template molecule, methacrylic acid as a functional monomer, azobisisobutyronitrile as an initiator, and ethylene glycol dimethacrylate as a cross-linking agent, an fragrance substance that can target and adsorb phenol is obtained through in situ polymerization.

[0045] Specifically, a certain ratio of natural plant fragrance particles, phenol, and methacrylic acid are placed in a certain volume of acetonitrile solution and stirred for a certain time, wherein the mass ratio of the natural plant fragrance particles, phenol, and methacrylic acid is preferably 2:1:3, and the volume value of acetonitrile (unit: L) is preferably 1 / 300 of the total mass (unit: g) of the natural plant fragrance particles, phenol, and methacrylic acid;

[0046] Then, a certain ratio of ethylene glycol dimethacrylate (EGDMA) and azobisisobutyronitrile (AIBN) is added to the acetonitrile solution, and after ultrasonic dispersion for a certain time, nitrogen is passed through the solution to remove oxygen for an appropriate time, and then the solution is sealed and reacted for a certain time under certain temperature conditions; here, the ratio of ethylene glycol dimethacrylate (EGDMA) and azobisisobutyronitrile (AIBN) is preferably 20:1, the ultrasonic dispersion time is preferably 5 min-15 min, the nitrogen passing through the solution to remove oxygen time is preferably 15 min-25 min, the reaction temperature is controlled at 45° C.-55° C., and the reaction time is preferably 0.5 h-2 h;

[0047] Finally, the aroma-imparting substance having both targeted adsorption of phenol and natural plant fragrance can be obtained by repeatedly rinsing with a detergent for 2-3 times and freeze-drying for 3h-5h; here, the detergent is an acetic acid ethanol solution with a volume ratio of 1:9.

[0048] As can be seen from the above, the preparation method provided by the present invention can obtain an aroma-imparting substance capable of targeted adsorption of phenol. Moreover, the raw materials used in the preparation method are readily available and low in cost, making it suitable for industrial mass production.

[0049] See also Figure 2 , Figure 2This is a schematic diagram of the structure of a cigarette provided by the present invention. The cigarette provided by the present invention comprises a tobacco segment 1, a first filter segment, a cavity segment 3, and a second filter segment connected in sequence. The cavity segment contains the aforementioned flavoring material 5. Of course, the cigarette also includes cigarette paper that binds the tobacco segment 1, the first filter segment, the cavity segment 3, and the second filter segment together. In this embodiment, both the first and second filter segments utilize acetate filter rods. Specifically, the first filter segment is a first acetate filter segment, and the second filter segment is a second acetate filter segment. The cavity segment 3 is filled with the granular flavoring material 5. It should be understood that when smoking the cigarette, as the smoke generated by the tobacco segment 1 passes through the flavoring material, phenol in the smoke is selectively captured by the phenol molecularly imprinted polymer on the surface of the granular flavoring material, while other chemical components are not adsorbed or are only minimally adsorbed, thereby preserving the original aroma of the smoke as much as possible. Furthermore, the natural plant flavoring particles included in the carrier can enhance sensory perception by imparting a safe and pleasant distinctive aroma to the smoke.

[0050] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0051] Example 1

[0052] This embodiment provides a method for preparing an aroma substance A, wherein the aroma substance A can target phenol and has the aroma of tamarind. Specifically, the method for preparing the aroma substance A comprises the following steps:

[0053] Step S1, preparing a tamarind fragrance raw material: tamarind is washed, cored, and crushed, 1000 g is accurately weighed, and a 30% (volume fraction) ethanol aqueous solution is added at a material-liquid ratio (mass ratio) of 1:3, heated to 50° C., and extracted for 2.0 hours, for a total of two extractions. The two extracts are combined and concentrated under reduced pressure to a paste to obtain about 150 g of a tamarind fragrance raw material; 500 mL of a 30% ethanol aqueous solution is added to the tamarind fragrance raw material, shaken until uniformly dispersed, centrifuged at 8000 r / min for 15 minutes, and the supernatant is collected. The supernatant is then filtered through a 0.22 μm polyvinylidene fluoride (PVDF) microporous filter membrane and a polyethersulfone (PES) ultrafiltration membrane with a molecular weight cutoff of 10 kD, and the filtrate is collected. The filtrate is concentrated and freeze-dried to obtain about 30 g of a tamarind fragrance raw material.

[0054] Step S3, preparing tamarind fragrance particles: weighing 100g of food-grade polylactic acid and heating it until melted, adding 10g of the tamarind fragrance raw material obtained above, stirring evenly and then rapidly cooling, crushing and sieving the obtained block solid to obtain tamarind fragrance particles with a particle size of 10-20 mesh.

[0055] Step S3, preparing a flavoring agent A that has both targeted adsorption of phenol and tamarind aroma: Weigh 100g of the above-mentioned tamarind aroma particles, 50g of phenol, and 150g of methacrylic acid (MAA), add them to 1L of acetonitrile, and stir thoroughly at room temperature for 2 hours. Then, add 100g of ethylene glycol dimethacrylate (EGDMA) and 5g of azobisisobutyronitrile (AIBN), ultrasonically disperse for 10 minutes, then deoxygenate with nitrogen for 20 minutes, seal, and react at 50°C for half an hour. The mixture is then repeatedly rinsed with an ethyl acetate solution (volume ratio of 1:9) 2-3 times and freeze-dried for 4 hours to obtain a flavoring agent A that has both targeted adsorption of phenol and tamarind aroma (denoted as phe / PLA / LWZ).

[0056] Example 2

[0057] This embodiment provides a method for preparing an aroma substance B, wherein the aroma substance B can target phenol and has a fig aroma. Specifically, the method for preparing the aroma substance B comprises the following steps:

[0058] Step S1, preparing a fig fragrance raw material: washing and crushing the figs, accurately weighing 1000g, adding 20% (volume fraction) ethanol aqueous solution at a material-liquid ratio (mass ratio) of 1:2, heating to 50°C and extracting for 2.0h, extracting twice. Combining the two extracts, concentrating under reduced pressure to a paste, and obtaining about 200g of a fig crude extract; adding 500mL of 20% ethanol aqueous solution to the fig crude extract, shaking until uniformly dispersed, centrifuging at 8000r / min for 15min, collecting the supernatant, and then filtering through a 0.22μm polyvinylidene fluoride (PVDF) microporous filter membrane and a polyethersulfone (PES) ultrafiltration membrane with a molecular weight cutoff of 10kD, collecting the filtrate, concentrating, and freeze-drying to obtain about 50g of a fig fragrance raw material.

[0059] Step S2, preparing fig-flavored particles: weighing 100g of food-grade polylactic acid and heating it until melted, adding 10g of the fig-flavored raw material obtained above, stirring evenly and then rapidly cooling, crushing and sieving the obtained block solid to obtain fig-flavored particles with a particle size of 10-20 mesh.

[0060] Step S3, preparing a flavoring agent B that has both targeted phenol adsorption and fig aroma: 100g of the aforementioned fig aroma particles, 50g of phenol, and 150g of (MAA) were weighed and added to 1L of acetonitrile. The mixture was stirred thoroughly at room temperature for 2 hours. 100g of EGDMA and 5g of AIBN were then added. Ultrasonic dispersion was performed for 10 minutes, followed by nitrogen flow for deoxygenation for 20 minutes, then sealed and reacted at 50°C for 1 hour. The mixture was then rinsed repeatedly with an acetic acid / ethanol solution (volume ratio of 1:9) 2-3 times and freeze-dried for 4 hours to obtain a flavoring agent B that has both targeted phenol adsorption and fig aroma (denoted as phe / PLA / WHG).

[0061] To further illustrate the beneficial effects of the present invention, the following experiments were performed:

[0062] Cigarette test sample A containing flavoring substance A (phe / PLA / LWZ):

[0063] The filter rod of the cigarette test sample of the flavoring substance A (phe / PLA / LWZ) includes two acetate filter segments and a cavity segment sandwiched between the two acetate filter segments, and the flavoring substance A is added into the cavity. Figure 2 The cigarette test sample A includes a tobacco segment 1, a first acetate filter segment 2, a cavity segment 3, and a second acetate filter segment 4 connected from left to right. The aroma substance A (phe / PLA / LWZ) is added to the cavity segment 3. The addition amount and number are shown in Table 1.

[0064] Cigarette control sample:

[0065] The filter rod of the cigarette control sample is a conventional acetate filter rod without any particles added.

[0066] Detection of phenol release in mainstream cigarette smoke:

[0067] According to YC / T 255-2008, Determination of major phenolic compounds in mainstream cigarette smoke—High performance liquid chromatography method, phenol in the mainstream smoke of cigarette test sample A and cigarette control sample was determined. The results are shown in Table 1.

[0068] Table 1 Phenol release in mainstream smoke

[0069]

[0070] The results showed that the phenol release in the mainstream smoke of cigarette samples added with flavoring substance A (phe / PLA / LWZ) was reduced, and as the amount of flavoring substance A added to the filter rod increased, the phenol release in the mainstream smoke decreased, indicating that the flavoring substance A can effectively reduce the release of phenol.

[0071] Sensory quality evaluation:

[0072] Test sample 3 and the cigarette control sample were divided into two groups, each with 20 cigarettes. The cigarettes were subjected to sensory evaluation according to the standard "YC / T497-2014 Sensory Evaluation Method for Chinese Cigarette Style". The evaluation results were averaged. The evaluation results data are detailed in Table 2.

[0073] It can be seen from the data in Table 2 that compared with the control sample, the sensory effect evaluation score of test sample 3 added with flavoring substance A is significantly improved, the sweetness and sourness are enhanced, the irritation is reduced, the aroma is soft, delicate and round, the smoke is richer, and the impurities are reduced.

[0074] Table 2 Sensory evaluation scores of cigarettes

[0075]

[0076] In summary, the flavoring substance capable of targeted adsorption of phenol of the present invention is added to the filter rod part of the cigarette. During the smoking process, it can not only target the adsorption of phenol in the smoke, but also specifically give the cigarette the characteristic aroma of natural plants, thereby improving the smoke quality and improving the consumer's smoking experience.

[0077] The embodiments of the invention are described above in conjunction with the accompanying drawings, but the invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the inspiration of the invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the invention and the claims, all of which are protected by the invention.

Claims

1. A method for preparing an aroma material capable of targeted adsorption of phenol, characterized in that: The preparation method comprises the following steps: Step S1, preparing natural plant fragrance raw materials using natural plants; The step S1 includes the following process: The natural plant is placed in a hot water bath at a certain temperature according to a certain material-liquid ratio for reflux extraction to obtain an extract; The extract is filtered and concentrated under reduced pressure to a paste to obtain an initial extract; Weigh a certain amount of initial extract, add ethanol, shake and dissolve, then centrifuge, take the supernatant, filter with a microporous filter membrane and an ultrafiltration membrane respectively, collect the filtrate, concentrate and freeze-dry to obtain the natural plant fragrance raw material; Step S2, using the natural plant fragrance raw material to impart fragrance to the polymer to obtain natural plant fragrance particles: The step S2 includes the following process: heating a certain amount of food-grade polymer until it melts; the polymer is polypropylene; Adding the obtained natural plant fragrance raw material to the molten polymer, stirring evenly and then rapidly freezing and cooling until agglomerates to obtain a natural plant fragrance block solid; The block solid is crushed and sieved to obtain natural plant fragrance particles with a particle size of 10-20 mesh; Step S3, obtaining the aroma material by in-situ polymerization using the raw materials of the natural plant aroma particles and the phenol molecularly imprinted polymer; The step S3 includes the following process: Using 10-20 mesh natural plant fragrance particles as carriers, phenol as template molecules, methacrylic acid as functional monomer, azobisisobutyronitrile as initiator, and ethylene glycol dimethacrylate as cross-linking agent, an fragrance substance capable of targeted adsorption of phenol is obtained through in-situ polymerization.

2. The preparation method according to claim 1, characterized in that The natural plant fragrance raw materials are obtained by extraction from natural plants, and the natural plants are selected from one or more of tamarind, hawthorn, plum, tamarind, and fig.

3. A cigarette, characterized in that: The cigarette comprises a tobacco segment, a first filter segment, a cavity segment and a second filter segment connected in sequence, and the cavity segment contains the flavoring substance according to any one of claims 1 to 2.

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