In-situ pore-forming cigarette paper preparation method for reducing the release amount of nitrosamine in cigarette smoke

Abstract

Provided is a method for preparing an in-situ pore-forming cigarette paper for reducing the release amount of nitrosamines in cigarette smoke, belonging to the technical field of cigarette paper production in the tobacco industry. In this preparation method, a nitrogen-containing polysaccharide solution and a specific inorganic template agent are added during the papermaking process of ordinary cigarette paper. When the cigarette burns, the cellulose in the paper burns and cracks, in-situ generating a nitrogen-doped porous carbon material with a pore size range between 0.1 nanometer and 100 nanometers, which has excellent effects on capturing and adsorbing harmful substances such as nitrosamines. This preparation method is simple and low-cost. The cigarette paper has variable diffusivity and pore structure, and the ratio of additives can be adjusted according to needs to obtain cigarette papers with different adsorption properties. The cigarette paper of the present invention can effectively reduce the release amount of nitrosamines in cigarette smoke, improve the smoke quality, reduce the harm to smokers and the surrounding environment, and has broad application prospects and potential value.

Description

Technical Field

[0001] The present invention belongs to the technical field of cigarette paper production in the tobacco industry, and particularly relates to a method for preparing an in-situ pore-forming cigarette paper for reducing the release amount of nitrosamines in cigarette smoke. Background Art

[0002] Cigarette smoke contains a large number of harmful components, among which tobacco-specific nitrosamines (TSNA), mainly including N-nitrosonornicotine (NNN), N-nitrosoanatabine (NAT), N-nitrosoanabasine (NAB) and 4-(N-methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK), are considered to be the main carcinogens and are closely related to the occurrence of various cancers, especially lung cancer. Since the nitrosamines in cigarette smoke pose a serious threat to the health of smokers and passive smokers, it is particularly important to reduce the release amount of nitrosamines in cigarette smoke. By taking relevant measures to reduce the content of nitrosamines in smoke, the safety of cigarettes can be improved, the harm of smoking to health can be reduced, the health of smokers and non-smokers can be protected, and at the same time, it also meets the needs of the tobacco industry to comply with regulations and sustainable development.

[0003] Regarding the technology for reducing the release amount of nitrosamines in cigarette smoke, tobacco researchers at home and abroad have done a lot of research. These studies mainly focus on aspects such as tobacco raw material selection, planting and harvesting management, tobacco processing technology, additives, and cigarette paper improvement. By optimizing tobacco planting and processing technology and adjusting the components and smoke release conditions of cigarettes, the content of nitrosamines in smoke can be effectively reduced. For example, some research teams have tried to use high-efficiency materials such as adsorbents and chemical additives as additives for cigarette paper to adsorb nitrosamines in smoke. In terms of improving tobacco raw materials, by breeding tobacco varieties with low nitrosamine content or by improving planting and harvesting management to reduce the accumulation of nitrites in the soil, the formation of nitrosamines in cigarette smoke is fundamentally reduced. There are also some researchers who focus on adding specific compounds, such as nitrite reductase inhibitors, to prevent the formation of nitrosamines. By adding these compounds, the release of nitrosamines in smoke can be effectively reduced. These methods can reduce the release of nitrosamines to a certain extent, but due to the high cost of the added materials or the complex preparation process, their application in industrial production is still limited.

[0004] Cigarette paper is an important material in cigarette production. The main characteristic of cigarette paper is that it directly participates in cigarette combustion, and it has an important impact on aspects such as the smoldering property of cigarette rods, the cigarette combustion rate, the release amounts of mainstream and sidestream smokes, the smoking taste of cigarettes, and the appearance quality. Therefore, utilizing the influence of cigarette paper on the cigarette combustion state is an effective means to reduce the harmful components in mainstream cigarette smoke. The in-situ pore-forming technology by adding inorganic templating agents to cigarette paper is a technology for improving the structure of cigarette paper, aiming to reduce the release amount of harmful components in cigarette smoke. This technology mainly adds inorganic templating agents during the preparation process of cigarette paper, enabling the cigarette paper to generate microporous structures of porous carbon during combustion, thereby regulating the flow and combustion rate of smoke and adsorbing harmful components in the smoke. Inorganic templating agents are special compounds with the ability to form pore structures. After adding inorganic templating agents, when the cigarette paper burns in an air atmosphere, the templating agents will decompose or transform into gases at high temperatures, generating porous carbon with pore structures. These pores can serve as reaction channels for gas phase and particulate phase, affecting the diffusion of smoke and the transformation of components. By adjusting the type, content, and distribution mode of inorganic templating agents, in-situ pore formation of cigarette paper and its structure can be achieved, thereby achieving selective adsorption of harmful components in the smoke.

[0005] As an effective method for reducing nitrosamines in cigarette smoke, the pore-forming technology by cigarette paper combustion has the following advantages: Cigarette paper, as a component of cigarettes, directly participates in the cigarette combustion process. By adjusting the pore structure and arrangement mode of cigarette paper, the flow and selective adsorption characteristics of smoke can be controlled, thereby reducing the generation and release of nitrosamines. Compared with some other additives or improvement methods, the improvement cost of the pore-forming technology by cigarette paper combustion is relatively low, and it is easier to promote and apply. The improvement of the pore-forming technology by cigarette paper combustion mainly targets the cigarette rod structure and does not require changing the tobacco formula, so it has less impact on the taste and smoking experience of tobacco. For the cigarette products improved by this technology, without increasing the cigarette cost, the nitrosamine content can be effectively reduced, meeting the sustainable development needs of the tobacco industry. In summary, reducing the release amount of nitrosamines in cigarette smoke by the pore-forming technology by cigarette paper combustion has good application prospects and advantages. Summary of the Invention

[0006] The technical problem solved by the present invention: Provide a method for preparing in-situ pore-forming cigarette paper for reducing the release amount of nitrosamines in cigarette smoke. The purpose of the present invention is to develop a cigarette paper that generates nitrogen-doped porous carbon materials in-situ during cigarette combustion by adding specific inorganic templating agents and nitrogen-containing polysaccharides to the paper. This material can highly selectively adsorb nitrosamines in cigarette smoke, thereby reducing their release amount and harm to human health.

[0007] To achieve the above object, the technical solution adopted by the present invention:

[0008] In-situ pore-forming cigarette paper preparation method for reducing the release amount of nitrosamines in cigarette smoke, comprising the following steps:

[0009] Step 1): Prepare pulp, inorganic template agent, and prepare a nitrogen-containing polysaccharide solution;

[0010] Step 2): Add inorganic template agent: Add the inorganic template agent to the nitrogen-containing polysaccharide solution and mix well;

[0011] Step 3): Impregnation or coating: Impregnate or coat the prepared nitrogen-containing polysaccharide and inorganic template agent solution onto the base paper, so that the nitrogen-containing polysaccharide and inorganic template agent are loaded onto the cigarette paper pulp;

[0012] Step 4): Prepare cigarette paper: Press and dry the impregnated or coated base paper to obtain cigarette paper with a nitrogen-containing polysaccharide carrier;

[0013] Step 5): Burn to prepare porous carbon material: When using the cigarette paper, during cigarette burning, the cellulose and nitrogen-containing polysaccharide biomass in the cigarette paper are burned and cracked in an air atmosphere to in-situ generate nitrogen-doped porous carbon material. This material is generated near the cigarette burning carbon line, has a porous structure, and active sites are contained in the pores, and has a highly selective adsorption property for nitrosamines in cigarette smoke.

[0014] In the above solution, the inorganic template agent is one or more of potassium chloride, potassium carbonate, sodium carbonate, sodium chloride, sodium nitrate, and ammonium phosphate.

[0015] In the above solution, the addition amount of the inorganic template agent is 0.1-10% of the total weight of the cigarette paper.

[0016] In the above solution, when preparing the nitrogen-containing polysaccharide solution, dissolve the nitrogen-containing polysaccharide in an appropriate solvent to form a nitrogen-containing polysaccharide solution.

[0017] In the above solution, the nitrogen-containing polysaccharide is one or more of chitosan, glucosamine, and chitosan sulfate.

[0018] In the above solution, the loading amount of the nitrogen-containing polysaccharide is 0.01-3% of the total weight of the cigarette paper.

[0019] In the above solution, the pore size range of the porous carbon material is between 0.1-100 nm, and the specific surface area is between 800-2000 m 2 / g.

[0020] In the above solution, the porous carbon material is generated near 0.5 mm-10 mm of the cigarette burning carbon line.

[0021] In the above solution, when preparing the nitrogen-containing polysaccharide solution, a compound containing a functional group is added to the nitrogen-containing polysaccharide solution, so that functional functional groups are introduced onto the pore surface of the porous carbon material to enhance the adsorption performance of nitrosamines.

[0022] In the above solution, when preparing the nitrogen-containing polysaccharide solution, other substances are added to the nitrogen-containing polysaccharide solution to form a composite material to improve its adsorption selectivity for nitrosamines; the doped substances include but are not limited to elements such as nitrogen, boron, sulfur, copper, zinc, and silver.

[0023] Advantages of the present invention compared with the prior art:

[0024] 1. This solution provides a cigarette paper with a special structure and composition. The cigarette paper is prepared by adding inorganic templating agents such as potassium salts like potassium chloride and potassium carbonate, as well as calcium salts like calcium chloride and calcium carbonate, and combining with a nitrogen-containing polysaccharide solution through a specific processing technology; when the cigarette burns, the cigarette paper can in-situ generate nitrogen-doped porous carbon materials with a porous structure. These porous carbon materials have a diverse pore size range, approximately between 0.1 nanometer and 100 nanometers. This nitrogen-doped porous carbon material with a porous structure has excellent adsorption performance and can highly selectively adsorb nitrosamines in cigarette smoke, thereby effectively reducing the release of nitrosamines in cigarette smoke and reducing the harm to human health.

[0025] 2. By adding specific inorganic templating agents and nitrogen-containing polysaccharides, this solution in-situ generates nitrogen-doped porous carbon materials when the cigarette burns, achieving the function of highly selective adsorption of nitrosamines in cigarette smoke. This invention has important application value in cigarette production and the smoking process, and is expected to make important contributions to improving the quality of cigarette smoke and reducing the harm to human health and the environment. The preparation method of this cigarette paper is simple, the cost is low, and all the raw materials used comply with the safe additives allowed in the "List of Permitted Tobacco Additives", meeting the laws, regulations, and relevant standards requirements of the national and international tobacco industries, and having high safety and practicability, which is conducive to industrial production and popularization and application. Description of the Drawings

[0026] Figure 1 It is a schematic diagram of the burning of a cigarette in the present invention;

[0027] Figure 2 For the present invention Figure 1 It is an enlarged structural schematic diagram of the porous carbon material at position A in the present invention. Detailed Embodiments

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figure 1-2 , and the embodiments of the present invention will be described in detail.

[0030] A method for preparing an in-situ pore-forming cigarette paper for reducing the release amount of nitrosamines in cigarette smoke includes the following steps:

[0031] Step 1): Prepare pulp, an inorganic template agent, and prepare a nitrogen-containing polysaccharide solution;

[0032] When preparing the nitrogen-containing polysaccharide solution, dissolve the nitrogen-containing polysaccharide in an appropriate amount of water solvent to form a nitrogen-containing polysaccharide solution. The concentration of the nitrogen-containing polysaccharide can be adjusted as needed to control the content of the nitrogen-containing polysaccharide in the paper.

[0033] Preferably, the nitrogen-containing polysaccharide is one or more of chitosan, glucosamine, and chitosan sulfate. The loading amount of the nitrogen-containing polysaccharide is 0.01-3% of the total weight of the cigarette paper.

[0034] Step 2): Add the inorganic template agent: Add the inorganic template agent to the nitrogen-containing polysaccharide solution and mix well; the types and amounts of the inorganic filler and the template agent can be adjusted as needed to achieve different pore structures and adsorption properties.

[0035] Preferably, the inorganic template agent is one or more of potassium chloride, potassium carbonate, sodium carbonate, sodium chloride, sodium nitrate, and ammonium phosphate. The addition amount of the inorganic template agent is 0.1-10% of the total weight of the cigarette paper.

[0036] Step 3): Impregnation or coating: Impregnate or coat the prepared nitrogen-containing polysaccharide and inorganic template agent solution onto the base paper so that the nitrogen-containing polysaccharide and the inorganic template agent are loaded onto the cigarette paper.

[0037] The impregnation or coating process can be carried out using existing papermaking process equipment. For example, the nitrogen-containing polysaccharide solution obtained in step 1) is evenly coated on the paper surface.

[0038] Step 4): Prepare the cigarette paper: The base paper after impregnation or coating is subjected to papermaking, pressing, and drying to obtain a cigarette paper with a nitrogen-containing polysaccharide carrier. During the preparation process, the physical properties and adsorption properties of the cigarette paper can be further optimized by adjusting process conditions such as papermaking parameters and drying temperature. For example, using conventional paper preparation equipment, the pulp with a nitrogen-containing polysaccharide carrier is made into a cigarette paper and subjected to pressing and drying treatments.

[0039] Step 5): Preparation of porous carbon materials by combustion: When using cigarette paper, during cigarette combustion, refer to Figure 1 As shown, the cellulose and nitrogen-containing polysaccharide biomass in the cigarette paper are burned and pyrolyzed in an air atmosphere. Due to the presence of the inorganic template agent, nitrogen-doped porous carbon materials are in-situ generated during the combustion process. Refer to Figure 2 As shown, this material is generated near the carbon line during cigarette combustion and has a porous structure. These porous carbon materials have a large specific surface area and abundant active sites in the pores, and have a high selective adsorption property for nitrosamines in cigarette smoke.

[0040] Among them, the pore size of the porous carbon material ranges from 0.1 to 100 nm, and the specific surface area is between 800 and 2000 m 2 / g. The porous carbon material is generated near the cigarette combustion carbon line at 0.5 mm - 10 mm.

[0041] Among them, when preparing the nitrogen-containing polysaccharide solution, functional group surface treatment can be selected. Compounds containing functional groups are added to the nitrogen-containing polysaccharide solution to introduce functional groups such as hydroxyl, amine, and carboxyl groups on the pore surface of the porous carbon material to enhance the adsorption performance for nitrosamines.

[0042] When preparing the nitrogen-containing polysaccharide solution, other substances such as heteroelements or metal oxides are added to the nitrogen-containing polysaccharide solution to form a composite material to improve its adsorption selectivity for nitrosamines; the doped substances include but are not limited to nitrogen, boron, sulfur, copper, zinc, and silver elements. For example, nanoparticles containing metal oxides are added to the nitrogen-containing polysaccharide solution to dope the porous carbon material with metal oxides.

[0043] When implementing the preparation method of the present invention, it can be optimized and adjusted according to specific circumstances and needs to obtain the best cigarette paper product. The in-situ pore-forming cigarette paper prepared can effectively reduce the release amount of harmful substances such as nitrosamines during cigarette combustion, has high safety and practicability, and is suitable for popularization and application in industrial production.

[0044] The following lists 5 examples for illustration.

[0045] Example 1:

[0046] Prepare a nitrogen-containing polysaccharide solution: Dissolve 5 grams of chitosan in 250 milliliters of water to form a nitrogen-containing polysaccharide solution.

[0047] Add an inorganic template agent: Select potassium chloride and potassium carbonate as the inorganic template agent, with a ratio of KCl:K2CO3 = 1:5. A total of 10 g of the template agent is added to the above chitosan solution and mixed well.

[0048] Impregnation or coating: Impregnate or coat the nitrogen-containing polysaccharide solution onto the base paper so that the nitrogen-containing polysaccharide and the inorganic templating agent are loaded onto the cigarette paper.

[0049] Prepare cigarettes: Pass the impregnated or coated base paper through steps such as pressing and drying to obtain cigarette paper with a nitrogen-containing polysaccharide carrier. Then, cut the cigarette paper into specified sizes and roll it into cigarettes on a machine.

[0050] Generate porous carbon materials during combustion: Light the cigarette paper with a nitrogen-containing polysaccharide carrier. Biomass such as cellulose and nitrogen-containing polysaccharide in the paper burn and crack in the air, and nitrogen-doped porous carbon materials are formed under the action of the gas generated by the decomposition of potassium chloride and potassium carbonate templating agents.

[0051] Example 2:

[0052] Prepare a nitrogen-containing polysaccharide solution: Dissolve 8 grams of glucosamine in 200 milliliters of water to form a nitrogen-containing polysaccharide solution.

[0053] Add an inorganic templating agent: Select potassium carbonate as the inorganic templating agent, add 15 grams of potassium carbonate to the above glucosamine solution, and mix well.

[0054] Coating: Coat the nitrogen-containing polysaccharide solution onto the base paper so that the nitrogen-containing polysaccharide and the inorganic templating agent are loaded onto the cigarette paper.

[0055] Prepare cigarettes: Pass the coated base paper through steps such as pressing and drying to obtain cigarette paper with a nitrogen-containing polysaccharide carrier. Then, cut the cigarette paper into specified sizes and roll it into cigarettes on a machine.

[0056] Generate porous carbon materials during combustion: Light the cigarette paper with a nitrogen-containing polysaccharide carrier. Biomass such as cellulose and nitrogen-containing polysaccharide in the paper burn and crack in the air, and nitrogen-doped porous carbon materials are formed under the action of the gas generated by the decomposition of the potassium carbonate templating agent.

[0057] Example 3:

[0058] Prepare a nitrogen-containing polysaccharide solution: Dissolve 6 grams of chitosan in 180 milliliters of water to form a nitrogen-containing polysaccharide solution.

[0059] Add an inorganic templating agent: Select potassium chloride as the inorganic templating agent, add 12 grams of potassium chloride to the above chitosan solution, and mix well.

[0060] Coating: Coat the nitrogen-containing polysaccharide solution onto the base paper so that the nitrogen-containing polysaccharide and the inorganic templating agent are loaded onto the cigarette paper.

[0061] Prepare cigarettes: Pass the coated base paper through steps such as pressing and drying to obtain cigarette paper with a nitrogen-containing polysaccharide carrier. Then, cut the cigarette paper into specified sizes and roll it into cigarettes on a machine.

[0062] Generation of porous carbon materials during combustion: Ignite the cigarette paper with a nitrogen-containing polysaccharide carrier. Biomass such as cellulose and chitosan in the paper burn and pyrolyze in the air, and nitrogen-doped porous carbon materials are formed under the action of the gas generated by the decomposition of potassium chloride templating agent.

[0063] Example 4:

[0064] Prepare a nitrogen-containing polysaccharide solution: Dissolve 10 grams of chitosan and 5 grams of glucosamine in 1000 milliliters of water to form a nitrogen-containing polysaccharide solution.

[0065] Add an inorganic templating agent: Select sodium carbonate as the inorganic templating agent, add 20 grams of sodium carbonate to the above nitrogen-containing polysaccharide solution, and mix well.

[0066] Coating: Coat the nitrogen-containing polysaccharide solution onto the base paper so that the nitrogen-containing polysaccharide and the inorganic templating agent are loaded onto the cigarette paper.

[0067] Prepare cigarettes: Subject the coated base paper to steps such as pressing and drying to obtain cigarette paper with a nitrogen-containing polysaccharide carrier. Then roll the cigarette paper cut to the specified size into cigarettes on a machine.

[0068] Generation of porous carbon materials during combustion: Ignite the cigarette paper with a nitrogen-containing polysaccharide carrier. Biomass such as cellulose and nitrogen-containing polysaccharide in the paper burn and pyrolyze in the air, and nitrogen-doped porous carbon materials are formed under the action of the gas generated by the decomposition of sodium carbonate templating agent.

[0069] Example 5:

[0070] Prepare a nitrogen-containing polysaccharide solution: Dissolve 7 grams of glucosamine in 220 milliliters of water to form a nitrogen-containing polysaccharide solution.

[0071] Add an inorganic templating agent: Select potassium chloride and potassium carbonate as the inorganic templating agents, with a ratio of KCl:K2CO3 = 1:3. A total of 14 grams of templating agent is added to the above glucosamine solution and mixed well.

[0072] Coating: Coat the nitrogen-containing polysaccharide solution in step 1 onto the base paper so that the nitrogen-containing polysaccharide and the inorganic templating agent are loaded onto the cigarette paper. The sizing amount of the coated paper is 1.7 g / m².

[0073] Prepare cigarettes: Subject the coated base paper to steps such as pressing and drying to obtain cigarette paper with a nitrogen-containing polysaccharide carrier. Then roll the cigarette paper cut to the specified size into cigarettes on a machine.

[0074] Generation of porous carbon materials during combustion: Ignite the cigarette paper with a nitrogen-containing polysaccharide carrier. Biomass such as cellulose and nitrogen-containing polysaccharide in the paper burn and pyrolyze in the air, and nitrogen-doped porous carbon materials are formed under the action of the gas generated by the decomposition of potassium carbonate templating agent.

[0075] For cigarettes prepared with the in-situ pore-forming cigarette paper of the present invention, the release amount of nitrosamines in the cigarette smoke is significantly reduced. Compared with traditional cigarette paper, the average release amounts of nitrosamines in Examples 1-5 are reduced by 40%, 25%, 55%, 30%, and 50% respectively. This confirms that the cigarette paper of the present invention can highly selectively adsorb nitrosamines in the cigarette smoke and form an effective filter layer in the cigarette smoke, thereby significantly reducing its release amount, improving the cigarette smoke quality, and reducing the harm to human health and the environment.

[0076] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0077] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. In-situ pore-forming cigarette paper preparation method for reducing the release amount of nitrosamines in cigarette smoke, characterized in that: It includes the following steps: Step 1): Prepare pulp, inorganic template agent, and prepare a nitrogen-containing polysaccharide solution; The inorganic template agent is one or more of potassium chloride, potassium carbonate, sodium carbonate, sodium chloride, sodium nitrate, and ammonium phosphate; the nitrogen-containing polysaccharide is one or more of chitosan, glucosamine, and chitosan sulfate; Step 2): Add the inorganic template agent: Add the inorganic template agent to the nitrogen-containing polysaccharide solution and mix well; Step 3): Impregnation or coating: Impregnate or coat the prepared nitrogen-containing polysaccharide and inorganic template agent solution onto the base paper to load the nitrogen-containing polysaccharide and inorganic template agent onto the cigarette paper; Step 4): Prepare the cigarette paper: Press and dry the impregnated or coated base paper to obtain the cigarette paper with a nitrogen-containing polysaccharide carrier; Step 5): Burn to prepare the porous carbon material: When using the cigarette paper, during cigarette combustion, the cellulose and nitrogen-containing polysaccharide biomass in the cigarette paper are burned and cracked in an air atmosphere to in-situ generate a nitrogen-doped porous carbon material. This material is generated near the cigarette combustion carbon line, has a porous structure, and contains active sites in the pores, and has a high selective adsorption property for nitrosamines in cigarette smoke.

2. The in-situ pore-forming cigarette paper preparation method for reducing the release amount of nitrosamine in cigarette smoke according to claim 1, wherein: The addition amount of the inorganic template agent is 0.1-10% of the total weight of the cigarette paper.

3. The in-situ pore-forming cigarette paper preparation method for reducing the release amount of nitrosamine in cigarette smoke according to claim 1, characterized in that: When preparing the nitrogen-containing polysaccharide solution, dissolve the nitrogen-containing polysaccharide in an appropriate solvent to form a nitrogen-containing polysaccharide solution.

4. The in-situ pore-forming cigarette paper preparation method for reducing the release amount of nitrosamines in cigarette smoke according to claim 1, characterized in that: The loading amount of the nitrogen-containing polysaccharide is 0.01-3% of the total weight of the cigarette paper.

5. The method for preparing an in-situ pore-forming cigarette paper for reducing the release amount of nitrosamines in cigarette smoke according to claim 1, wherein: The pore size of the porous carbon material ranges from 0.1 to 100 nm, and the specific surface area ranges from 800 to 2000 m 2 / g.

6. The in-situ pore-forming cigarette paper preparation method for reducing the release amount of nitrosamines in cigarette smoke according to claim 1, wherein: The porous carbon material is generated near 0.5mm-10mm of the cigarette combustion carbon line.

7. The method for preparing an in-situ pore-forming cigarette paper for reducing the release amount of nitrosamines in cigarette smoke according to claim 1, characterized in that: When preparing the nitrogen-containing polysaccharide solution, add a compound containing a functional group to the nitrogen-containing polysaccharide solution to introduce a functionalized functional group on the pore surface of the porous carbon material to enhance the adsorption performance for nitrosamines.

8. The in-situ pore-forming cigarette paper preparation method for reducing the release amount of nitrosamines in cigarette smoke according to claim 1, characterized in that: When preparing the nitrogen-containing polysaccharide solution, add other substances to the nitrogen-containing polysaccharide solution to form a composite material to improve its adsorption selectivity for nitrosamines; the doped substances include elements such as nitrogen, boron, sulfur, copper, zinc, and silver.

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