Tobacco flavor coating liquid for cigarette paper as well as preparation method and application method of tobacco flavor coating liquid

Abstract

The invention discloses tobacco flavor coating liquid for cigarette paper as well as a preparation method and an application method of the tobacco flavor coating liquid, and belongs to the technical field of tobacco flavor coating liquid. The tobacco flavor coating liquid for the cigarette paper comprises 1-4% of a combustion improver, 0.5-1.5% of a dispersing agent, 10-20% of composite flavor and 74.5-88.5% of a composite tobacco extract, the composite tobacco extract is prepared by the following steps: firstly, respectively carrying out enzymolysis and fermentation on waste tobacco powder and tobacco flower buds, then mixing the waste tobacco powder subjected to enzymolysis with the fermented tobacco flower buds, carrying out a Maillard reaction, and finally, carrying out extraction. According to the tobacco flavor coating liquid for the cigarette paper, the aroma amount and the aroma concentration of cigarettes are remarkably increased, and offensive odor and irritation of the cigarettes are reduced.

Description

Technical Field

[0001] This invention relates to the field of tobacco flavoring coating liquid technology, specifically to a tobacco flavoring coating liquid for cigarette paper and its preparation and application methods. Background Technology

[0002] As a special consumer product, the sensory quality of cigarettes is a core indicator for evaluating product quality. Among these, the amount and concentration of aroma, as well as the comfort during smoking (such as irritation and throat sensation), are key concerns for consumers. To improve the flavor of cigarettes, the tobacco industry typically adds various tobacco flavorings during the cigarette production process. Currently, the main methods of adding flavorings include incorporating flavorings into the tobacco leaves, using flavored filter rods, and coating the cigarette paper.

[0003] Using cigarette paper as a carrier for flavoring has unique advantages: cigarette paper, being the outermost layer of the cigarette, releases aroma immediately during combustion, playing a crucial role in modifying the initial aroma and overall flavor profile of the cigarette. However, existing flavoring coating liquids for cigarette paper and their application technologies still have the following main problems: On the one hand, traditional coating liquids often use simple solvents to dissolve flavorings, resulting in weak bonding between flavoring molecules and cigarette paper fibers; during cigarette storage, volatilization loss is likely to occur; during combustion, uneven heating or excessively rapid release often leads to insufficient aroma burst, making it difficult to effectively increase the overall aroma quantity and concentration of the cigarette, resulting in a "top-heavy" or discontinuous aroma. On the other hand, in pursuit of a rich aroma, existing technologies often compensate for insufficient release efficiency by increasing the amount of flavoring used; however, high-concentration flavorings directly coated on the paper are prone to producing burnt or sharp, irritating odors during combustion, resulting in a rough, harsh smoke that severely affects the comfort and smoothness of smoking.

[0004] Therefore, there is an urgent need to develop a tobacco flavoring coating liquid for cigarette paper to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a tobacco flavoring coating liquid for cigarette paper, its preparation method and application method, so as to solve the technical problems mentioned in the background art.

[0006] The technical solution to achieve the objective of this invention is: In a first aspect, the present invention provides a tobacco flavoring coating liquid for cigarette paper, wherein the raw material components, by mass percentage, include: 1-4% combustion aid, 0.5-1.5% dispersant, 10-20% compound flavoring, and 74.5-88.5% compound tobacco extract.

[0007] Furthermore, the combustion aid includes potassium citrate; the combustion aid optimizes the burning rate and burning temperature of the cigarette paper, ensuring that the aroma components in the compound flavoring and compound tobacco extract can be fully and uniformly thermally decomposed and released.

[0008] Furthermore, the dispersant is any one or two of a 2% carboxymethyl cellulose aqueous solution and a 3% sodium alginate aqueous solution; the dispersant effectively improves the compatibility of each component in the coating liquid and the uniformity of distribution on the paper base, avoids uneven combustion caused by excessively high local concentrations, and reduces the irritation of the flue gas from the source.

[0009] Furthermore, the compound tobacco extract is obtained by first enzymatically hydrolyzing and fermenting waste tobacco dust and tobacco buds, then mixing the enzymatically hydrolyzed waste tobacco dust with the fermented tobacco buds for Maillard reaction, and finally extracting the extract.

[0010] Furthermore, the composite fragrance is obtained by loading the fragrance onto flower-shaped hydrotalcite and encapsulating it with a biomass wall material.

[0011] Furthermore, the flavoring comprises, by weight percentage, 45-50% deionized water, 20-22% propylene glycol, 18-20% glycerin, 6-8% licorice polysaccharide, 5-7% jujube polysaccharide, 3-4% monk fruit polysaccharide, and 2-3% tamarind polysaccharide.

[0012] Licorice polysaccharides can form a protective film on the surface of the throat mucosa, reducing external irritation and relieving dryness and foreign body sensation; at the same time, the natural sweetness and anti-inflammatory properties of licorice can help reduce the irritation of smoke and improve oral comfort.

[0013] The introduction of jujube polysaccharides can enhance the roasted sweet aroma of cigarettes and improve the taste. The natural sweetness they provide can blend well with the smoke. Compared with synthetic sweeteners, the sweetness of jujube polysaccharides is more mellow and lasting, and can form a layer with the sweetness of licorice polysaccharides to jointly build the "sweet" tone in the "sweet and sour balance" while avoiding the sweetness from overpowering the taste. Monk fruit polysaccharides have the physical property of forming a protective film in the respiratory tract, which can moisturize the throat and relieve dryness and irritation. In addition, components such as mogrosides also have anti-inflammatory and cough reflex-inhibiting effects. Adding monk fruit polysaccharides to flavorings can further enhance the overall throat-moistening and soothing effect of the formula. In synergy with licorice polysaccharides, it can significantly reduce the physical and chemical irritation of smoke to the throat and achieve a milder smoke effect.

[0014] The introduction of tamarind polysaccharides provides a slight acidity, regulates pH, quenches thirst, and balances sweetness.

[0015] Secondly, the present invention provides a method for preparing the tobacco flavoring coating liquid for cigarette paper as described in the first aspect, the steps of which include: (1) Weigh and mix each raw material component; (2) Mix the combustion aid, dispersant, compound fragrance and compound tobacco extract for at least 30 minutes, and then ultrasonically disperse for 10-20 minutes to obtain the tobacco fragrance coating liquid for cigarette paper.

[0016] Furthermore, the preparation steps of the compound tobacco extract are as follows: S1.1 The waste smoke powder is crushed and sterilized; S1.2 Add water to the waste tobacco treated in S1.1 at a material-to-liquid ratio of 1:5, then add bacterial enzymes for hydrolysis, centrifuge, take the supernatant, concentrate, and obtain tobacco extract; S2.1 Crush and sterilize tobacco buds; S2.2 Add water to the tobacco buds treated in S2.1 at a material-to-liquid ratio of 1:10, then add yeast for fermentation, centrifuge, and take the supernatant to obtain tobacco bud extract; S3 mixes tobacco dust extract and tobacco bud extract at a mass ratio of 1:(3~5), adjusts the pH to 6.5~7, and then performs Maillard reaction at 60~80℃ for 3~12h to obtain a compound tobacco extract.

[0017] Further, in step S1.2, the bacterial enzymatic hydrolysis is first performed by adding cellulase at a constant temperature and shaking at 48~52℃ for 5.5~6.5h; then, protease is added, and the enzymatic hydrolysis is continued at a constant temperature and shaking for another 5.5~6.5h; in step S2.2, the yeast used for yeast fermentation is high-activity brewing yeast, the fermentation temperature is 34~36℃, the fermentation time is 24~36h, and the pH is controlled at 5~6.

[0018] Furthermore, the preparation steps of the compound fragrance are as follows: A1.1 Weigh and mix all the raw material components of the spice; A1.2 Heat deionized water to 60~70℃, then add licorice polysaccharide, jujube polysaccharide, monk fruit polysaccharide, and tamarind polysaccharide and stir for at least 30 minutes to obtain the aqueous phase; A1.3 Propylene glycol and glycerol are mixed evenly to obtain the alcohol phase; A1.4 Pour the alcohol phase into the aqueous phase, continue stirring for at least 30 minutes, then homogenize 2-3 times at 20-30 MPa, filter, seal and let stand for aging for 24-48 hours to obtain the fragrance liquid; A2. Place 0.2-0.3 parts by weight of flower-shaped hydrotalcite into 100-150 parts by weight of fragrance liquid, shake at room temperature for 10-60 minutes, filter, and mix 0.2-0.3 parts by weight of the filtered flower-shaped hydrotalcite, 0.8-1.2 parts by weight of urea, and 2-3 parts by weight of distilled water to obtain mixture ①. A3. Mix 0.2-0.3 parts by weight of grapefruit peel cellulose with 2-3 parts by weight of distilled water and stir for 20-40 minutes to obtain mixture ②; A4. Add mixture ① to mixture ②, heat to 68~72℃ under nitrogen protection, add 0.07~0.09 parts by mass of potassium persulfate, 3.5~3.7 parts by mass of acrylic acid, and 0.03 parts by mass of Nδ-vinylhistidine, keep the mixture at this temperature for 2.5~3.5 hours. After the reaction is complete, cool to room temperature, wash with ethanol 2~4 times, and then freeze dry to obtain the compound fragrance.

[0019] Further, the preparation steps of the flower-shaped hydrotalcite are as follows: 2-3 parts by mass of magnesium nitrate, 1-3 parts by mass of aluminum nitrate, and 40-60 parts by mass of distilled water are mixed and stirred for at least 30 minutes. Then, 6-7 parts by mass of urea are added and the mixture is further dispersed for 25-35 minutes to obtain mixture A. 0.3 parts by mass of β-cyclodextrin and 40 parts by mass of distilled water are mixed and stirred until dissolved to obtain mixture B. Solution B is added dropwise to solution A and stirred and dispersed at room temperature for at least 60 minutes. Then, a hydrothermal reaction is carried out at 175-185℃ for 23-25 ​​hours. After the reaction is completed, the mixture is cooled to room temperature, the precipitate is collected, and washed three times each with anhydrous ethanol and deionized water. After washing, the mixture is freeze-dried, ground, and stored to obtain flower-shaped hydrotalcite.

[0020] Thirdly, the present invention provides a method for applying the tobacco flavoring coating liquid for cigarette paper as described in the first aspect, the steps of which include: uniformly coating one side of the cigarette paper with the tobacco flavoring coating liquid for cigarette paper, and drying the coated cigarette paper.

[0021] By adopting the above technical solution, the present invention has the following beneficial effects: (1) The tobacco flavoring coating liquid for cigarette paper of the present invention comprises combustion aid, dispersant, compound flavoring and compound tobacco extract. After the coating liquid is applied to cigarette paper, the resulting cigarette not only significantly improves the amount and concentration of aroma, but also has excellent sensory characteristics of low irritation, high comfort and throat moisturizing.

[0022] (2) In the preparation of the compound tobacco extract of the present invention: firstly, waste tobacco dust and tobacco buds are subjected to enzymatic hydrolysis and fermentation pretreatment respectively. Then, the enzymatically hydrolyzed waste tobacco dust and fermented tobacco buds are mixed and subjected to Maillard reaction. Finally, the extract is obtained by extraction. This realizes the utilization of waste tobacco dust and tobacco buds, reflects the green and environmentally friendly concept, and has a wide source of raw materials. More importantly, the waste tobacco dust releases a high content of reducing sugar after enzymatic hydrolysis, while the tobacco buds are enriched with amino acids after fermentation. The two are combined and subjected to Maillard reaction, which promotes the full interaction of reducing sugar and amino acids to generate Maillard reaction products with aroma-enhancing and modifying functions. These products give cigarettes a rich and mellow aroma, effectively mask the impurities in the smoke, reduce irritation, and improve the overall sensory comfort.

[0023] (3) The compound fragrance of the present invention is obtained by loading the fragrance onto flower-shaped hydrotalcite and wrapping it with biomass wall material; wherein, the fragrance includes 45-50% deionized water, 20-22% propylene glycol, 18-20% glycerin, 6-8% licorice polysaccharide, 5-7% jujube polysaccharide, 3-4% monk fruit polysaccharide, and 2-3% tamarind polysaccharide by mass percentage; utilizing the efficient moisturizing effect of glycerin and propylene glycol, combined with the excellent film-forming properties of licorice and monk fruit polysaccharide, it effectively reduces the dryness and irritation of the oral cavity and throat caused by the loss of moisture in the smoke from the physical level, directly contributing to a significant "throat-moistening" and "smooth" sensation; while the sweet and sour balance provides a noticeable throat-moistening sensation, the smoke is smooth, and it does not overpower the original aroma of the tobacco leaves; the natural roasted sweet aroma provided by jujube polysaccharide and the tamarind polysaccharide The subtle acidity from the sugar works synergistically to create a pleasant and natural "sweet-sour balance." This balance, derived from natural plant components, complements the natural aroma of tobacco harmoniously, preventing the aroma from overpowering the tobacco's flavor. The inherent anti-inflammatory and soothing properties of licorice and monk fruit polysaccharides, along with the encapsulation or modification of some irritating substances in the smoke by all polysaccharide components, collectively reduce the harshness and irritation of cigarettes, resulting in a smoother and cleaner taste. The use of water-soluble polysaccharides, propylene glycol, and glycerin avoids the addition of overly volatile or overly prominent synthetic flavorings, allowing the flavor release of polysaccharides to be slower and more persistent, thus improving comfort and achieving a balance that "does not overpower the natural aroma of the tobacco leaves," highlighting the unique characteristics of the tobacco raw material itself.

[0024] (4) The composite fragrance of the present invention is obtained by loading the fragrance onto flower-shaped hydrotalcite and encapsulating it with a wall material formed by the reaction of grapefruit peel cellulose, acrylic acid, and Nδ-vinylhistidine. The unique layered structure and high specific surface area of ​​the flower-shaped hydrotalcite are used to load the fragrance components, which not only achieves uniform dispersion and slow release of aroma substances under heat, but also avoids the loss of fragrance volatilization during cigarette storage and avoids the explosive release of aroma in the early stage of combustion. It also acts as a functional filler and combustion aid to synergistically regulate the burning speed of cigarette paper and ensure that the temperature of the combustion zone is stable within a suitable range. Secondly, the wall material formed by the reaction of grapefruit peel cellulose, acrylic acid, and Nδ-vinylhistidine is used for encapsulation. Among them, Nδ-vinylhistidine provides abundant free amino sites. When the cigarette burns to the high temperature zone near the flame, the released fragrance polysaccharides and the exposed amino acids in the wall material undergo an in-situ Maillard reaction to generate Maillard reaction products with aroma-enhancing and modifying functions. Thus, the aroma of the cigarette is dynamically "synthesized" during the combustion process and further enhanced, making the smoke fuller, more natural, and more layered. Detailed Implementation

[0025] To better understand the above technical solution, the following will provide a detailed explanation of the technical solution in conjunction with specific implementation methods.

[0026] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention.

[0027] The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, and should not be used to limit the scope of protection of the present invention.

[0028] The waste tobacco dust was provided by Guangdong Tobacco Company. It was dried at 40°C and then pulverized through an 80-mesh sieve.

[0029] Potassium citrate is used as the combustion improver.

[0030] The dispersant used is a 3% sodium alginate aqueous solution.

[0031] The protease was prepared by mixing Alcalase 2.4L and Flavorzyme 500MG, supplied by Novozymes of Denmark, at a mass ratio of 1:1.

[0032] Activated brewing yeast: The brewing yeast is mixed with sterile water at 35~40℃ at a ratio of 1:10 and activated in a water bath at 32℃ for 2 hours.

[0033] For pomelo peel cellulose, please refer to the literature "LS Zhou, YS Xiong, R Jia, MX Li, BH Fan, JY Tang, W Li, HQ Lu, YW Lan, K Li. (3-Chloro-2-hydroxypropyl) trimethylammoniumchloride and polyethyleneimine co-modified pomelo peel cellulose-derived aerogel for remelt syrup decolorization in sugar refining [J]. International Journal of Biological Macromolecules, 2023, 229: The preparation steps for 1054-1068” are as follows: First, clean the fresh grapefruit peel, dry it, and then grind it in a high-speed multi-functional pulverizer. The grapefruit peel powder is then separated using a 100-mesh sieve. Second, weigh 10g of the ground grapefruit peel powder and add it to 200mL of 0.1mol / L hydrogen chloride solution. Stir for 30min, filter, and wash with distilled water until neutral. Place the washed product in a 60℃ oven to dry. Then, add the acid-treated grapefruit peel powder to 200mL of 10% (w / w) sodium hydroxide solution, heat and stir for 3h, filter, wash with distilled water until neutral, and dry in a 60℃ oven for 6h. Finally, add the dried alkaline-treated grapefruit peel to 200mL of 8% (v / v) hydrogen peroxide solution at room temperature and stir for 2h. After the reaction is complete, filter, wash three times with water and ethanol respectively, and dry at 60℃ to obtain grapefruit peel cellulose.

[0034] Example 1 A method for preparing a tobacco flavoring coating liquid for cigarette paper, comprising the following steps: (1) Weigh and mix each raw material component according to the following mass percentages: 1% combustion aid, 0.5% dispersant, 10% compound flavoring, and 88.5% compound tobacco extract; (2) Mix the combustion aid, dispersant, compound fragrance and compound tobacco extract for 30 min, then ultrasonically disperse for 10 min to obtain the tobacco fragrance coating liquid for cigarette paper.

[0035] The preparation steps of the compound tobacco extract are as follows: S1.1 The waste tobacco powder is crushed and passed through an 80-mesh sieve, then added to distilled water at a material-to-liquid ratio of 1:10, and sterilized by boiling in a water bath for 30 minutes; S1.2 Add water to the waste tobacco powder treated in S1.1 at a material-to-liquid ratio of 1:5. Then, first, use 5‰ of the waste tobacco powder mass of cellulase for enzymatic hydrolysis at 48℃ with constant temperature shaking for 6.5h. Then, add 5‰ of the waste tobacco powder mass of protease and continue enzymatic hydrolysis at constant temperature shaking for 6.5h. Centrifuge at 8000rpm and 20℃ for 20min, take the supernatant, concentrate, and obtain a tobacco powder extract with a solid content of 52%. S2.1 The tobacco buds are crushed and passed through a 60-mesh sieve, and distilled water is added at a material-to-liquid ratio of 1:10. The mixture is then sterilized by boiling in a water bath for 30 minutes. S2.2 Add water to the tobacco buds treated in S2.1 at a material-to-liquid ratio of 1:10, then add 5 vol% activated high-activity brewing yeast for fermentation. The fermentation temperature is 34℃, the fermentation time is 36 h, and the pH is controlled at 5. Centrifuge and take the supernatant to obtain tobacco bud extract. S3 mixes tobacco dust extract and tobacco bud extract at a mass ratio of 1:3, adjusts the pH to 6.5, and then performs a Maillard reaction at 60°C for 12 hours to obtain a compound tobacco extract.

[0036] The preparation steps of the compound fragrance are as follows: A1.1 Weigh and mix the raw materials of the fragrance according to the following mass percentages: 44% deionized water, 22% propylene glycol, 18% glycerin, 6% licorice polysaccharide, 5% jujube polysaccharide, 3% monk fruit polysaccharide, and 2% tamarind polysaccharide. A1.2 Heat deionized water to 60℃, then add licorice polysaccharide, jujube polysaccharide, monk fruit polysaccharide, and tamarind polysaccharide and stir for 30 minutes to obtain the aqueous phase; A1.3 Propylene glycol and glycerol are mixed evenly to obtain the alcohol phase; A1.4 Pour the alcohol phase into the aqueous phase, continue stirring for at least 30 minutes, then homogenize three times at 20 MPa, filter, seal and let stand for 24 hours to obtain the fragrance liquid; A2. Place 0.2 parts by mass of flower-shaped hydrotalcite into 100 parts by mass of fragrance liquid, shake at room temperature for 10 minutes, filter, and mix 0.2 parts by mass of the filtered flower-shaped hydrotalcite, 0.8 parts by mass of urea, and 2 parts by mass of distilled water to obtain mixture ①. A3. Mix 0.2 parts by weight of grapefruit peel cellulose with 2 parts by weight of distilled water and stir for 20 minutes to obtain mixture ②; A4 added mixture ① to mixture ②, heated to 68°C under nitrogen protection, added 0.07 parts by mass of potassium persulfate, 3.5 parts by mass of acrylic acid, and 0.03 parts by mass of Nδ-vinylhistidine, and kept at this temperature for 3.5 hours. After the reaction was completed, cooled to room temperature, washed twice with ethanol, and then freeze-dried to obtain the compound fragrance.

[0037] The preparation steps of the flower-shaped hydrotalcite are as follows: 2 parts by mass of magnesium nitrate, 1 part by mass of aluminum nitrate, and 40 parts by mass of distilled water are mixed and stirred for 30 min. Then, 6 parts by mass of urea are added and the mixture is further dispersed for 25 min to obtain mixture A. 0.3 parts by mass of β-cyclodextrin and 40 parts by mass of distilled water are mixed and stirred until dissolved to obtain mixture B. Solution B is added dropwise to solution A and stirred and dispersed at room temperature for 60 min. Then, a hydrothermal reaction is carried out at 175℃ for 25 h. After the reaction is completed, the mixture is cooled to room temperature, the precipitate is collected, and it is washed 3 times each with anhydrous ethanol and deionized water. After washing, the mixture is freeze-dried, ground, and stored to obtain flower-shaped hydrotalcite.

[0038] Example 2 A method for preparing a tobacco flavoring coating liquid for cigarette paper, comprising the following steps: (1) Weigh and mix the raw materials according to the following mass percentages: 2.5% combustion aid, 1% dispersant, 15% compound flavoring, and 81.5% compound tobacco extract; (2) Mix the combustion aid, dispersant, compound fragrance and compound tobacco extract for 30 min, then ultrasonically disperse for 15 min to obtain the tobacco fragrance coating liquid for cigarette paper.

[0039] The preparation steps of the compound tobacco extract are as follows: S1.1 The waste tobacco powder is crushed and passed through an 80-mesh sieve, then added to distilled water at a material-to-liquid ratio of 1:10, and sterilized by boiling in a water bath for 30 minutes; S1.2 Add water to the waste tobacco powder treated in S1.1 at a material-to-liquid ratio of 1:5. Then, first, use 5‰ of the waste tobacco powder mass of cellulase for enzymatic hydrolysis at 50℃ with constant temperature shaking for 6 hours. Then, add 5‰ of the waste tobacco powder mass of protease and continue enzymatic hydrolysis at constant temperature shaking for 6 hours. Centrifuge at 8000 rpm and 20℃ for 20 minutes, take the supernatant, concentrate, and obtain tobacco powder extract with a solid content of 50%. S2.1 The tobacco buds are crushed and passed through a 60-mesh sieve, and distilled water is added at a material-to-liquid ratio of 1:10. The mixture is then sterilized by boiling in a water bath for 30 minutes. S2.2 Add water to the tobacco buds treated in S2.1 at a material-to-liquid ratio of 1:10, then add 5 vol% activated high-activity brewing yeast for fermentation. The fermentation temperature is 35℃, the fermentation time is 24h, and the pH is controlled at 5. Centrifuge and take the supernatant to obtain tobacco bud extract. S3 mixes tobacco dust extract and tobacco bud extract at a mass ratio of 1:4, adjusts the pH to 7, and then performs a Maillard reaction at 70°C for 8 hours to obtain a compound tobacco extract.

[0040] The preparation steps of the compound fragrance are as follows: A1.1 Weigh and mix the raw materials of the fragrance according to the following mass percentages: 41% deionized water, 21% propylene glycol, 19% glycerin, 7% licorice polysaccharide, 6% jujube polysaccharide, 3.5% monk fruit polysaccharide, and 2.5% tamarind polysaccharide. A1.2 Heat deionized water to 65℃, then add licorice polysaccharide, jujube polysaccharide, monk fruit polysaccharide, and tamarind polysaccharide and stir for 30 minutes to obtain the aqueous phase; A1.3 Propylene glycol and glycerol are mixed evenly to obtain the alcohol phase; A1.4 Pour the alcohol phase into the aqueous phase, continue stirring for 30 min, then homogenize three times at 30 MPa, filter, seal and let stand for 24 h to obtain the fragrance liquid; A2. Place 0.24 parts by weight of flower-shaped hydrotalcite into 120 parts by weight of fragrance liquid, shake at room temperature for 40 minutes, filter, and mix 0.24 parts by weight of the filtered flower-shaped hydrotalcite, 1 part by weight of urea, and 2 parts by weight of distilled water to obtain mixture ①. A3. Mix 0.24 parts by weight of grapefruit peel cellulose with 2 parts by weight of distilled water and stir for 30 minutes to obtain mixture ②; A4 added mixture ① to mixture ②, heated to 70°C under nitrogen protection, added 0.08 parts by mass of potassium persulfate, 3.6 parts by mass of acrylic acid, and 0.03 parts by mass of Nδ-vinylhistidine, and kept at this temperature for 3 hours. After the reaction was completed, cooled to room temperature, washed 3 times with ethanol, and then freeze-dried to obtain the compound fragrance.

[0041] The preparation steps of the flower-shaped hydrotalcite are as follows: 2.18 parts by mass of magnesium nitrate, 1.88 parts by mass of aluminum nitrate, and 60 parts by mass of distilled water are mixed and stirred for 30 min. Then, 6.5 parts by mass of urea are added and the mixture is further dispersed for 30 min to obtain mixture A. 0.3 parts by mass of β-cyclodextrin and 40 parts by mass of distilled water are mixed and stirred until dissolved to obtain mixture B. Solution B is added dropwise to solution A and stirred and dispersed at room temperature for at least 60 min. Then, the mixture is hydrothermally reacted at 180℃ for 24 h. After the reaction is completed, the mixture is cooled to room temperature, the precipitate is collected, and it is washed three times each with anhydrous ethanol and deionized water. After washing, the mixture is freeze-dried, ground, and stored to obtain flower-shaped hydrotalcite.

[0042] Example 3 A method for preparing a tobacco flavoring coating liquid for cigarette paper, comprising the following steps: (1) Weigh and mix the raw materials according to the following mass percentages: 4% combustion aid, 1.5% dispersant, 20% compound flavoring, and 74.5% compound tobacco extract; (2) Mix the combustion aid, dispersant, compound fragrance and compound tobacco extract for 30 min, then ultrasonically disperse for 20 min to obtain the tobacco fragrance coating liquid for cigarette paper.

[0043] The preparation steps of the compound tobacco extract are as follows: S1.1 The waste tobacco powder is crushed and passed through an 80-mesh sieve, then added to distilled water at a material-to-liquid ratio of 1:10, and sterilized by boiling in a water bath for 30 minutes; S1.2 Add water to the waste tobacco powder treated in S1.1 at a material-to-liquid ratio of 1:5. Then, first, use 5‰ of the waste tobacco powder mass of cellulase for enzymatic hydrolysis at 52℃ with constant temperature shaking for 5.5h. Then, add 5‰ of the waste tobacco powder mass of protease and continue enzymatic hydrolysis at constant temperature shaking for 5.5h. Centrifuge at 8000rpm and 20℃ for 20min, take the supernatant, concentrate, and obtain a tobacco powder extract with a solid content of 48%. S2.1 The tobacco buds are crushed and passed through a 60-mesh sieve, and distilled water is added at a material-to-liquid ratio of 1:10. The mixture is then sterilized by boiling in a water bath for 30 minutes. S2.2 Add water to the tobacco buds treated in S2.1 at a material-to-liquid ratio of 1:10, then add 5 vol% activated high-activity brewing yeast for fermentation. The fermentation temperature is 36℃, the fermentation time is 24 h, and the pH is controlled at 5.5. Centrifuge and take the supernatant to obtain tobacco bud extract. S3 mixes tobacco dust extract and tobacco bud extract at a mass ratio of 1:5, adjusts the pH to 6.5, and then performs a Maillard reaction at 80℃ for 3 hours to obtain a compound tobacco extract.

[0044] The preparation steps of the compound fragrance are as follows: A1.1 Weigh and mix the raw materials of the fragrance according to the following mass percentages: 38% deionized water, 20% propylene glycol, 20% glycerin, 8% licorice polysaccharide, 7% jujube polysaccharide, 4% monk fruit polysaccharide, and 3% tamarind polysaccharide. A1.2 Heat deionized water to 70℃, then add licorice polysaccharide, jujube polysaccharide, monk fruit polysaccharide, and tamarind polysaccharide and stir for 30 minutes to obtain the aqueous phase; A1.3 Propylene glycol and glycerol are mixed evenly to obtain the alcohol phase; A1.4 Pour the alcohol phase into the aqueous phase, continue stirring for 30 min, then homogenize twice at 30 MPa, filter, seal and let stand for 48 h to obtain the fragrance liquid; A2. Place 0.3 parts by mass of flower-shaped hydrotalcite into 150 parts by mass of fragrance liquid, shake at room temperature for 60 minutes, filter, and mix 0.3 parts by mass of the filtered flower-shaped hydrotalcite, 1.2 parts by mass of urea, and 3 parts by mass of distilled water to obtain mixture ①. A3. Mix 0.3 parts by weight of grapefruit peel cellulose with 3 parts by weight of distilled water and stir for 40 minutes to obtain mixture ②; A4 added mixture ① to mixture ②, heated to 72°C under nitrogen protection, added 0.09 parts by mass of potassium persulfate, 3.7 parts by mass of acrylic acid, and 0.03 parts by mass of Nδ-vinylhistidine, and kept at this temperature for 2.5 hours. After the reaction was completed, cooled to room temperature, washed 4 times with ethanol, and then freeze-dried to obtain the compound fragrance.

[0045] The preparation steps of the flower-shaped hydrotalcite are as follows: 3 parts by mass of magnesium nitrate, 3 parts by mass of aluminum nitrate, and 60 parts by mass of distilled water are mixed and stirred for 30 min. Then, 7 parts by mass of urea are added and the mixture is further dispersed for 35 min to obtain mixture A. 0.3 parts by mass of β-cyclodextrin and 40 parts by mass of distilled water are mixed and stirred until dissolved to obtain mixture B. Solution B is added dropwise to solution A and stirred and dispersed at room temperature for 60 min. Then, a hydrothermal reaction is carried out at 185℃ for 23 h. After the reaction is completed, the mixture is cooled to room temperature, the precipitate is collected, and it is washed three times each with anhydrous ethanol and deionized water. After washing, the mixture is freeze-dried, ground, and stored to obtain flower-shaped hydrotalcite.

[0046] Comparative Examples 1-4 The only difference between Comparative Examples 1-4 and Example 2 is that the mass ratio of tobacco dust extract to tobacco bud extract in the compound tobacco extract is 1:1, 1:2, 1:6, and 1:7.

[0047] Example of effect A 10-person evaluation panel with provincial-level evaluation qualifications conducted sensory evaluations of cigarettes based on GB / T 5606.4—2005 "Sensory Technical Requirements for Cigarettes" (Table 1), scoring the aroma, balance, irritation, aftertaste, and off-flavors. The evaluation score was based on the total score of the six indicators. Table 1 below shows the sensory evaluation results of cigarettes made from cigarettes coated with the tobacco flavoring coating liquid prepared in Examples 1-3 and Comparative Examples 1-4, as well as cigarettes without the tobacco flavoring coating liquid for cigarette paper as a blank example: Table 1

[0048] As shown in Table 1, the cigarette paper treated with the tobacco flavoring coating liquid prepared in Examples 1-3 produces cigarettes with a richer tobacco aroma, a sweet floral fragrance, a smooth and delicate smoke, a sweet and full-bodied flavor, low impurities, low irritation, a smooth entry, and a clean aftertaste with a lasting natural plant sweetness.

[0049] Comparative analysis of Examples 1-4 and Example 2 revealed that as the proportion of tobacco bud extract in the compound tobacco extract increased, the sensory quality of the resulting cigarettes showed a trend of first increasing and then decreasing. This indicates that when the mass ratio of tobacco dust extract to tobacco bud extract in the compound tobacco extract is controlled within the range of 1:(3-5), the sensory quality of the cigarettes made from the cigarette paper treated with the tobacco flavoring coating liquid for cigarette paper reaches the optimal level.

[0050] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tobacco flavoring coating liquid for cigarette paper, characterized in that, By weight percentage, the raw material components include: 1-4% combustion improver, 0.5-1.5% dispersant, 10-20% compound flavoring, and 74.5-88.5% compound tobacco extract.

2. The cigarette paper flavoring coating liquid according to claim 1, characterized in that, The compound tobacco extract is obtained by first enzymatically hydrolyzing and fermenting waste tobacco dust and tobacco buds, then mixing the enzymatically hydrolyzed waste tobacco dust with the fermented tobacco buds for Maillard reaction, and finally extracting the extract.

3. The tobacco flavoring coating liquid for cigarette paper according to claim 1, characterized in that, The compound fragrance is obtained by loading fragrance onto flower-shaped hydrotalcite and then encapsulating it with biomass wall material.

4. The cigarette paper flavoring coating liquid according to claim 3, characterized in that, The flavoring comprises, by weight percentage, 45-50% deionized water, 20-22% propylene glycol, 18-20% glycerin, 6-8% licorice polysaccharide, 5-7% jujube polysaccharide, 3-4% monk fruit polysaccharide, and 2-3% tamarind polysaccharide.

5. A method for preparing a tobacco flavoring coating liquid for cigarette paper as described in any one of claims 1 to 4, characterized in that, step... include: (1) Weigh and mix each raw material component; (2) Mix the combustion aid, dispersant, compound fragrance and compound tobacco extract for at least 30 minutes, and then ultrasonically disperse for 10-20 minutes to obtain the tobacco fragrance coating liquid for cigarette paper.

6. The method for preparing the tobacco flavoring coating liquid for cigarette paper according to claim 5, characterized in that, The preparation steps of the compound tobacco extract are as follows: S1.1 The waste smoke powder is crushed and sterilized; S1.2 Add water to the waste tobacco treated in S1.1 at a material-to-liquid ratio of 1:5, then add bacterial enzymes for hydrolysis, centrifuge, take the supernatant, concentrate, and obtain tobacco extract; S2.1 Crush and sterilize tobacco buds; S2.2 Add water to the tobacco flower buds treated in S2.1 at a material-to-liquid ratio of 1:10, then add yeast for fermentation, centrifuge, and take the supernatant to obtain tobacco flower bud extract; S3 mixes tobacco dust extract and tobacco bud extract at a mass ratio of 1:(3~5), adjusts the pH to 6.5~7, and then performs Maillard reaction at 60~80℃ for 3~12h to obtain a compound tobacco extract.

7. The method for preparing the tobacco flavoring coating liquid for cigarette paper according to claim 5, characterized in that, In step S1.2, the enzymatic hydrolysis is first performed using cellulase at a constant temperature of 48-52℃ with shaking for 5.5-6.5 hours; then, protease is added, and the enzymatic hydrolysis is continued with constant temperature shaking for another 5.5-6.5 hours. In step S2.2, the yeast used for yeast fermentation is high-activity brewing yeast, with a fermentation temperature of 34-36℃, a fermentation time of 24-36 hours, and a pH controlled at 5-6.

8. The method for preparing the tobacco flavoring coating liquid for cigarette paper according to claim 5, characterized in that, The preparation steps of the compound fragrance are as follows: A1.1 Weigh and mix all the raw material components of the spice; A1.2 Heat deionized water to 60~70℃, then add licorice polysaccharide, jujube polysaccharide, monk fruit polysaccharide, and tamarind polysaccharide and stir for at least 30 minutes to obtain the aqueous phase; A1.3 Propylene glycol and glycerol are mixed evenly to obtain the alcohol phase; A1.4 Pour the alcohol phase into the aqueous phase, continue stirring for at least 30 minutes, then homogenize 2-3 times at 20-30 MPa, filter, seal and let stand for aging for 24-48 hours to obtain the fragrance liquid; A2. Place 0.2-0.3 parts by weight of flower-shaped hydrotalcite into 100-150 parts by weight of fragrance liquid, shake at room temperature for 10-60 minutes, filter, and mix 0.2-0.3 parts by weight of the filtered flower-shaped hydrotalcite, 0.8-1.2 parts by weight of urea, and 2-3 parts by weight of distilled water to obtain mixture ①. A3. Mix 0.2-0.3 parts by weight of grapefruit peel cellulose with 2-3 parts by weight of distilled water and stir for 20-40 minutes to obtain mixture ②; A4. Add mixture ① to mixture ②, heat to 68~72℃ under nitrogen protection, add 0.07~0.09 parts by mass of potassium persulfate, 3.5~3.7 parts by mass of acrylic acid, and 0.03 parts by mass of Nδ-vinylhistidine, keep the reaction at this temperature for 2.5~3.5h. After the reaction is complete, cool to room temperature, wash with ethanol 2~4 times, and then freeze dry to obtain the compound fragrance.

9. The method for preparing the tobacco flavoring coating liquid for cigarette paper according to claim 5, characterized in that, The preparation steps of the flower-shaped hydrotalcite are as follows: 2-3 parts by weight of magnesium nitrate, 1-3 parts by weight of aluminum nitrate, and 40-60 parts by weight of distilled water are mixed and stirred and dispersed for at least 30 minutes. Then, 6-7 parts by weight of urea are added and the mixture is further dispersed for 25-35 minutes to obtain mixture A. 0.3 parts by mass of β-cyclodextrin were mixed with 40 parts by mass of distilled water and stirred until dissolved to obtain solution B. Solution B was added dropwise to solution A and stirred and dispersed at room temperature for at least 60 min. Then, hydrothermal reaction was carried out at 175~185℃ for 23~25 h. After the reaction was completed, the mixture was cooled to room temperature, the precipitate was collected, and washed three times each with anhydrous ethanol and deionized water. After washing, the mixture was freeze-dried, ground and stored to obtain flower-shaped hydrotalcite.

10. A method for applying the tobacco flavoring coating liquid for cigarette paper as described in any one of claims 1 to 4, characterized in that the steps include... include: The cigarette paper is coated evenly with a tobacco flavoring coating liquid, and then the coated cigarette paper is dried.

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