CN113558291A - Method for reducing isovaleric acid in cigarette smoke - Google Patents

Method for reducing isovaleric acid in cigarette smoke Download PDF

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Publication number
CN113558291A
CN113558291A CN202110987303.7A CN202110987303A CN113558291A CN 113558291 A CN113558291 A CN 113558291A CN 202110987303 A CN202110987303 A CN 202110987303A CN 113558291 A CN113558291 A CN 113558291A
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cigarette
nano silicon
filter stick
reducing
cigarette filter
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CN113558291B (en
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徐同广
周骏
王丽达
矫海楠
刘德水
芦楠
张�杰
蒋成勇
白若石
马雁军
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Shanghai Tobacco Group Co Ltd
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Shanghai Tobacco Group Co Ltd
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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/061—Use of materials for tobacco smoke filters containing additives entrapped within capsules, sponge-like material or the like, for further release upon smoking
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
    • A24D3/0212—Applying additives to filter materials
    • A24D3/0225—Applying additives to filter materials with solid additives, e.g. incorporation of a granular product
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Silicon Compounds (AREA)

Abstract

The invention provides a method for reducing isovaleric acid in cigarette smoke, which comprises the following steps: filtering the smoke of the cigarette by adopting a functional composite cigarette filter stick; the additive material of the functional composite cigarette filter stick comprises a plurality of materials selected from a large-pore-volume silica gel material, an aminated MOF material and a linoleic acid modified nano silicon-based oxide. The method provided by the invention reduces the irritating components of the isovaleric acid in the cigarette smoke in the form of the functional composite filter stick, and has small influence on the cigarette cost.

Description

Method for reducing isovaleric acid in cigarette smoke
Technical Field
The invention relates to the field of cigarette smoke adsorption, in particular to a method for reducing isovaleric acid in cigarette smoke.
Background
The sensory quality of the cigarette is closely related to the types and concentrations of chemical components in smoke, the types of compounds distributed in gas phase and particle phase substances of cigarette smoke aerosol are thousands, the composition and content of the compounds have important influence on the sensory quality of the cigarette, the taste is also related to the threshold value of the chemical components, the threshold value refers to the lowest concentration of the component which can be sensed, and the smaller the threshold value of one component is, the stronger the sensitivity is. Cigarette smoke irritation refers to a slight or noticeable unpleasant sensation of smoke to the senses, including irritation of the mouth, throat and nasal cavity. Research shows that some cigarettes produce unpleasant sour, bitter, spicy and astringent tastes due to the fact that substances such as volatile carbonyl compounds, phenolic compounds and ammonia with low molecular weight in smoke have stimulating effects, non-volatile organic acids have strong spicy, burning and rancidity at high concentration, and the substances stimulate taste acceptance and sensory nerves of oral cavities and sensory nerve endings and have negative effects on the sensory quality of the cigarettes. The isovaleric acid has strong volatility, has special unpleasant odor at higher concentration, has strong and lasting irritant acidic odor, and reflects strong irritation and obvious offensive odor on the sensory quality of the main stream smoke of the cigarette.
With the change of cigarette consumption habits and related requirements, the cigarette product has lower irritation, mellow taste and clean aftertaste, the market share of the cigarette product pursuing comfort is continuously expanding and firming, and the research and the improvement of the development technology of comfortable cigarettes are increasingly important. How to maintain and improve the sensory comfort of the cigarette and understand which chemical components have important influence on the sensory comfort, the chemical components with adverse influence can be selectively reduced. Has great significance for reasonably utilizing the raw and auxiliary materials of the cigarettes, properly selecting the processing technological parameters and improving the sensory quality of the cigarettes. At present, few adsorption materials are added into filter sticks, and the adsorption materials and the undesirable ingredients in the cigarette taste can be subjected to physical or chemical adsorption, so that the problem that the undesirable ingredients in the taste enter the oral cavity of a smoker is reduced. The requirement of reducing isovaleric acid in cigarette smoke in the form of a composite functional filter stick is an important subject to be solved urgently in the industry at present.
Disclosure of Invention
The invention provides a method for reducing isovaleric acid in cigarette smoke. The method provided by the invention reduces the isovaleric acid stimulating component in the cigarette smoke in the form of the specific functional composite filter stick, and has small influence on the cigarette cost.
The invention provides a method for reducing isovaleric acid in cigarette smoke, which comprises the following steps: filtering the smoke of the cigarette by adopting a functional composite cigarette filter stick; the additive material of the functional composite cigarette filter stick comprises a plurality of materials selected from a large-pore-volume silica gel material, an aminated MOF material and a linoleic acid modified nano silicon-based oxide.
According to the method for reducing the isovaleric acid in the cigarette smoke, provided by the invention, the additive materials comprise a large-pore-volume silica gel material, an aminated MOF material and linoleic acid modified nano silicon-based oxide. In the invention, the addition material can adsorb isovaleric acid from multiple angles, and particularly, the performance of the adsorption material is synergistically exerted through multiple adsorption actions among the large-pore-volume silica gel material, the aminated MOF material and the linoleic acid modified nano silicon-based oxide material.
In the invention, the macroporous silica gel material with rich mesoporous structure, the aminated organic-inorganic hybrid material (aminated MOF material) with specific functional groups and the nano silicon-based oxide modified on the surface of linoleic acid are compounded, which is beneficial to synergistically realizing the effective reduction of the irritant component isovaleric acid in the mixed cigarette smoke.
According to the method for reducing isovaleric acid in cigarette smoke, the mass ratio of the large-pore-volume silica gel material, the aminated MOF material and the linoleic acid modified nano silicon-based oxide is 18-36: 8-18: 3-6. According to the invention, by adopting the proportion, materials with different pore diameters and functional groups can better play the roles of physical adsorption and chemical adsorption, so that the concentration of an irritant component isovaleric acid in cigarette smoke is obviously reduced.
According to the method for reducing the isovaleric acid in the cigarette smoke, the consumption of the large-pore volume silica gel material is 24-26 mg/cigarette; the dosage of the aminated MOF material is 12-13 mg/branch; the dosage of the linoleic acid modified nano silicon-based oxide is 4-6 mg/branch.
According to the method for reducing isovaleric acid in cigarette smoke, the linoleic acid modified nano silicon-based oxide is linoleic acid modified nano silicon dioxide powder; preferably, the preparation of the linoleic acid modified nano silicon-based oxide comprises the following steps: sodium silicate and hydrochloric acid are used as raw materials to carry out precipitation reaction to obtain SiO2Precipitating the SiO2Mixing the precipitate with ethanol to obtain alcohol-dispersed SiO2Sol; then drying and calcining are carried out to obtain nano silicon dioxide powder; adding linoleic acid and the nano silicon dioxide powder into a normal hexane solvent, and carrying out ultrasonic oscillation, stirring reaction, separation, washing and drying to obtain a linoleic acid modified nano silicon-based oxide; preferably, a nonionic surfactant is added to the reaction solution during the precipitation reaction.
According to the method for reducing isovaleric acid in cigarette smoke, provided by the invention, the aminated MOF material is NH2-MIL-101(Fe) MOF material; preferably, the preparation of the aminated MOF material comprises: mixing ferric trichloride, 2-amino terephthalic acid and dimethylformamide, carrying out hydrothermal reaction, washing and drying to obtain the compound; the mass-volume ratio of ferric trichloride, 2-amino terephthalic acid and dimethylformamide is 2-4 g: 0.5-1.5 g: 60-70 ml.
According to the method for reducing the isovaleric acid in the cigarette smoke, the large-pore volume silica gel material is mediumA macroporous silica gel material with a pore structure; preferably, the specific surface area of the large-pore-volume silica gel material is 387m2In terms of/g, the mean pore diameter is 8.9 nm.
According to the invention, the specific addition materials, especially the macroporous silica gel material, the aminated MOF material and the linoleic acid modified nano silicon-based oxide under the parameters can be better subjected to physical adsorption and chemical adsorption, and have a synergistic effect on the adsorption of irritant components, so that the concentration of the irritant component isovaleric acid in the smoke is obviously reduced.
According to the method for reducing the isovaleric acid in the cigarette smoke, the functional composite cigarette filter stick is obtained by compounding a feed cigarette filter stick and a pure acetate fiber cigarette filter stick, and the feed cigarette filter stick is filled with the additive material.
According to the method for reducing the isovaleric acid in the cigarette smoke, the length ratio of the feed cigarette filter stick to the pure acetate fiber cigarette filter stick is (1-2.5): 1, preferably 1.5-2: 1.
according to the method for reducing the isovaleric acid in the cigarette smoke, the preparation steps of the functional composite cigarette filter stick comprise: adding a large-pore-volume silica gel material, the aminated MOF material and the linoleic acid modified nano silicon-based oxide into a cigarette bundle according to a proportion to obtain a fed cigarette filter stick, and then compounding the fed cigarette filter stick with a pure acetate cigarette filter stick to prepare a functional composite cigarette filter stick; preferably, the method also comprises the step of mixing the linoleic acid modified nano silicon-based oxide with glycerol triacetate. According to the invention, the cigarette filter stick is arranged into the two-section type composite structure of the feeding section and the pure acetate fiber section, and by adopting the method, the better effect of selectively reducing the target irritant component in the smoke can be realized through the interaction of different functional materials.
The invention also provides application of the functional composite filter stick for reducing the isovaleric acid in the smoke of the cigarette in conventional cigarettes and medium-grade cigarettes.
The invention has the beneficial effects that: the composite additive material of the functional composite filter stick adopted by the method has the advantages of no toxicity, no harm, sufficient source, simple process flow, convenient manufacture and low cost; according to the invention, molecular compounds with different sizes and properties can be selectively adsorbed based on the pore size difference and the surface functional groups of the material, adsorption materials with different pore sizes and surface functional groups are compounded, the influence of the material on the release amount of adverse sensory components in cigarette smoke is researched, and the selection and application combination of the material in the cigarette filter stick is optimized. The synergistic effect of the functions of different materials is exerted to reduce the release amount of harmful components in the smoke of the cigarette and components which cause adverse effects on the sense. The adding process in the filter stick is simple, the existing cigarette production process is not required to be changed, and auxiliary equipment is not required to be added; the composite functional filter stick can selectively reduce the irritant components in the main stream smoke of the cigarette, keep the original style of the cigarette basically unchanged, achieve the purpose of improving and enhancing the taste quality to a certain extent, meet the physiological requirements of consumers and enhance the competitiveness of products.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a functional composite cigarette filter stick in embodiment 1 of the invention;
fig. 2 is a schematic structural diagram of a functional composite cigarette filter stick in embodiment 2 of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention. The examples do not show the specific techniques or conditions, according to the technical or conditions described in the literature in the field, or according to the product specifications.
In the present invention, the instruments and the like used are conventional products which are purchased from regular vendors, not indicated by manufacturers. The process is conventional unless otherwise specified, and the starting materials are commercially available from the open literature. The examples do not show the specific techniques or conditions, according to the technical or conditions described in the literature in the field, or according to the product specifications.
In the embodiment of the invention, the used linoleic acid modified nano silicon-based oxide: sodium silicate and hydrochloric acid are used as raw materials to form SiO through precipitation reaction2Precipitation, preferably by adding a nonionic surfactant (5% Triton X-100) to the reaction mixture to control the particle size and dispersibility. Mixing SiO2Precipitate and ethanol were mixed at 10 g: 20ml of the above-mentioned mixture was mixed at a mass-to-volume ratio to form alcohol-dispersed SiO2And (3) sol. Drying, calcining at 550 deg.C to obtain nanometer silicon-based oxide nanometer SiO2And (3) powder. Adding linoleic acid and nano SiO into n-hexane solvent2Powder (n-hexane, linoleic acid and nano SiO)2The mass volume ratio of the powder is 1000 ml: 12 ml: 100g) and ultrasonically oscillating and stirring for reaction. Separating, washing, airing and vacuum drying the obtained product to obtain white powder, namely the linoleic acid modified nano silicon-based oxide. In the embodiment of the invention, the nano silicon-based oxide and the linoleic acid modified nano silicon-based oxide in the mass ratio of 1:2 are preferably dispersed into glycerol triacetate, and the mass ratio of the nano silicon-based oxide to the linoleic acid modified nano silicon-based oxide to the plasticizer is 1: 10.
In the examples of the invention, the aminated MOF material used: dissolving ferric trichloride and 2-amino terephthalic acid in dimethylformamide respectively, mixing the two solutions, and stirring to obtain a raw material mixed solution; transferring the mixed solution to a reaction kettle for hydrothermal reaction, and finally washing and drying the mixed solution by using ethanol (the mass volume ratio of ferric trichloride, 2-amino terephthalic acid and dimethyl formamide is 3 g: 1 g: 66ml) to obtain NH2MIL-101(Fe) MOF material.
In the embodiment of the invention, the specific surface area of the specific large-pore-volume silica gel material used is 387m2G, averageThe pore diameter is 8.9 nm.
In the embodiment of the invention, a large-pore-volume silica gel material, an aminated MOF material and glycerol triacetate with dispersed linoleic acid modified nano silicon-based oxide are added into cigarette tows according to a proportion to prepare a feeding cigarette filter stick, and then the feeding cigarette filter stick is compounded with a pure acetate fiber cigarette filter stick to prepare a functional composite cigarette filter stick, and then the functional composite cigarette filter stick is used for preparing a cigarette with obviously reduced irritation component isovaleric acid.
The embodiment of the invention provides a method for reducing isovaleric acid in cigarette smoke, which comprises the following steps: mixing a large-pore-volume silica gel material and an aminated MOF material according to a certain proportion, adding the mixture into a filter stick tow by a dry method, dispersing nano silicon-based oxides into a tow plasticizer triacetin, adding the mixture into the filter stick tow by a wet method to obtain a fed cigarette filter stick, then compounding the fed cigarette filter stick with a pure acetate fiber cigarette filter stick to prepare a functional composite cigarette filter stick, and applying the composite filter stick to conventional cigarettes and medium cigarettes to reduce the concentration of an irritant component isovaleric acid in cigarette smoke.
Example 1
The embodiment of the invention provides a method for reducing isovaleric acid in cigarette smoke, which comprises the following steps: adding a large-pore-volume silica gel material, an aminated MOF material and glycerol triacetate with dispersed linoleic acid modified nano silicon-based oxide into cigarette tows according to a ratio to prepare a fed cigarette filter rod, and compounding the fed cigarette filter rod with a pure acetate fiber cigarette filter rod to prepare a functional composite cigarette filter rod (the specific structure is shown in figure 1), wherein the length of a feeding section of the fed cigarette filter rod is 15mm, the composite material is a large-pore-volume silica gel material, an aminated MOF material and linoleic acid modified nano silicon-based oxide composite material, the large-pore-volume silica gel material and the aminated MOF material are mixed according to the mass ratio of 3:1, the application amount of particles (the large-pore-volume silica gel material, the aminated MOF material and the linoleic acid modified nano silicon-based oxide) is 3.0 +/-0.6 mg/mm, the linoleic acid modified nano silicon-based oxide is mixed with glycerol triacetate serving as a filter rod plasticizer according to the ratio of 1:10, and the application amount of the linoleic acid modified nano silicon-based oxide particles is 0.3 +/-0.05 mg/mm, only added in the filter rod section of the cigarette with the additive; the length of the pure acetate fiber filter stick, namely the pure acetate fiber section is 10 mm. The circumference of the functional composite cigarette filter stick is 24.35 +/-0.2 mm (the specific structure is shown in figure 1). After the composite filter stick is processed, the dosage of the large-pore-volume silica gel material in the embodiment is 26 mg/count; the dosage of the aminated MOF material is 13 mg/branch; the dosage of the linoleic acid modified nano silicon-based oxide is 6 mg/branch. Then, the functional composite cigarette filter stick is used for manufacturing the cigarette with the obviously reduced irritant component isovaleric acid, and the embodiment provides a common cigarette with the length of 84mm, wherein the length of the tobacco shred part is 59 mm. The feeding section of the cigarette filter is close to the tobacco shreds, and the pure acetate fiber section of the cigarette filter is arranged at the outer end of the filter. When cigarette smoke passes through the functional composite cigarette filter, the additive materials with different pore-size structures and functional groups can adsorb the irritant component isovaleric acid in the smoke.
Control 1: in the same procedure, a cigarette manufactured by using a pure acetate fiber filter stick with the same structure as the embodiment and the same cut tobacco was prepared as a control. Compared with the contrast, the release amount of the isovaleric acid in the mainstream smoke of the cigarette adopting the functional composite cigarette filter stick in the embodiment 1 is obviously reduced, and the reduction rate is 30.07%.
TABLE 1 Release amounts and TAV results for example 1 and control 1
Figure BDA0003231185370000071
Note: taste Activity Value (TAV) ═ CMeasurement of Release amount/TPM/CThreshold valueReflecting the contribution of the compound component to the sensory quality of the cigarette, when the value is more than 1, the compound is shown to contribute to the sensory system, and the higher the value is, the greater the contribution is.
Example 2
Adding a large-pore-volume silica gel material, an aminated MOF material and glycerol triacetate with dispersed linoleic acid modified nano silicon-based oxide into cigarette tows according to a proportion to prepare a fed cigarette filter rod, and compounding the fed cigarette filter rod with a pure acetate fiber cigarette filter rod to prepare a functional composite cigarette filter rod (the specific structure is shown in figure 2), wherein the length of a feeding section of the fed cigarette filter rod is 20mm, the composite material is a large-pore-volume silica gel material, an aminated MOF material and a linoleic acid modified nano silicon-based oxide composite material, the large-pore-volume silica gel material and the aminated MOF material are mixed according to a mass ratio of 2:1, the application amount of particles (the large-pore-volume silica gel material, the aminated MOF material and the linoleic acid modified nano silicon-based oxide) is 2.0 +/-0.6 mg/mm, and the linoleic acid modified nano silicon-based oxide is mixed with glycerol triacetate of the filter rod according to a mass ratio of 1:10, the application amount of the linoleic acid modified nano silicon-based oxide particles is 0.3 +/-0.05 mg/mm, and only the linoleic acid modified nano silicon-based oxide particles are added to a filter rod section of the cigarette with the additive; the length of the pure acetate fiber filter stick, namely the pure acetate fiber section is 10 mm. The circumference of the functional composite cigarette filter stick is 21.80 +/-0.2 mm. After the composite filter stick is processed, the dosage of the large-pore-volume silica gel material in the embodiment is 24 mg/count; the dosage of the aminated MOF material is 12 mg/branch; the dosage of the linoleic acid modified nano silicon-based oxide is 4 mg/branch. Then, the functional composite cigarette filter stick is used for manufacturing the cigarette with the obviously reduced irritant component isovaleric acid, and the embodiment provides a common cigarette with the length of 94mm, wherein the length of the tobacco shred part is 64 mm. The feeding section of the cigarette filter is close to the tobacco shreds, and the pure acetate fiber section of the cigarette filter is arranged at the outer end of the filter. When cigarette smoke passes through the functional composite cigarette filter, the additive materials with different pore-size structures and functional groups can adsorb the irritant component isovaleric acid in the smoke.
Control 2: in the same procedure, a cigarette manufactured by using a pure acetate fiber filter stick with the same structure as the embodiment and the same cut tobacco was prepared as a control. Compared with the contrast, the release amount of isovaleric acid in the mainstream smoke of the cigarette adopting the functional composite cigarette filter stick in the embodiment 2 is obviously reduced, and the reduction rate is 29.32%.
TABLE 2 Release amounts and TAV results for example 2 and control 2
Figure BDA0003231185370000081
Note: taste Activity Value (TAV) ═ CMeasurement of Release amount/TPM/CThreshold valueWhen the value is more than 1, the compound is shown to contribute to the sensory system, and the higher the value is, the higher the contribution isThe larger.
The isovaleric acid has peculiar unpleasant smell at higher concentration, has stronger and lasting irritant acidic smell and strong volatility, reflects that stronger irritation and obvious offensive odor can appear on the sensory quality of the main stream smoke of the cigarette, which is consistent with the sensory quality evaluation result of the cigarette, and the irritation of the cigarette adopting the functional composite filter stick is reduced, and the offensive odor and aftertaste are superior to those of a control cigarette. By combining the sensory evaluation result of the cigarettes, the use of the functional composite filter stick can obviously reduce the irritation and the miscellaneous gas of the smoke, improve the comfort of the oral cavity and totally does not influence the integral fragrance quantity and the style characteristics of the mixed type cigarettes.
The sensory evaluation of the cigarettes of the examples and the comparative examples was carried out with reference to the tobacco industry standard YC/T138-1998 sensory evaluation methods for tobacco and tobacco products, and the results are as follows:
TABLE 3 sensory evaluation results of cigarettes
Item Example 1 Control 1 Example 2 Control 2
Gloss of 4.5 4.5 4.5 4.5
Fragrance 27.0 26.5 27.0 26.8
Coordination of 5.0 5.0 5.0 5.0
Miscellaneous qi 10.8 10.7 10.8 10.5
Irritation property 17.0 16.5 17.2 16.6
Aftertaste 21.5 21.5 21.5 21.5
Sensory evaluation Total score 85.8 84.7 86.0 84.9
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (10)

1. A method for reducing isovaleric acid in cigarette smoke is characterized by comprising the following steps: filtering the smoke of the cigarette by adopting a functional composite cigarette filter stick; the additive material of the functional composite cigarette filter stick comprises a plurality of materials selected from a large-pore-volume silica gel material, an aminated MOF material and a linoleic acid modified nano silicon-based oxide.
2. The method for reducing isovaleric acid in cigarette smoke according to claim 1 wherein said additive materials include large pore volume silica gel materials, aminated MOF materials and linoleic acid modified nano silica-based oxides.
3. The method for reducing isovaleric acid in cigarette smoke according to claim 2, wherein the mass ratio of the large-pore-volume silica gel material, the aminated MOF material and the linoleic acid modified nano silicon-based oxide is 18-36: 8-18: 3-6.
4. The method for reducing the isovaleric acid in the smoke of cigarettes according to claim 2 or 3, wherein the amount of the large-pore-volume silica gel material is 24-26 mg/cigarette; the dosage of the aminated MOF material is 12-13 mg/branch; the dosage of the linoleic acid modified nano silicon-based oxide is 4-6 mg/branch.
5. The method for reducing the isovaleric acid content in cigarette smoke according to any one of claims 1 to 4, wherein the linoleic acid-modified nano silicon-based oxide is linoleic acid-modified nano silicon dioxide powder; preferably, the preparation of the linoleic acid modified nano silicon-based oxide comprises the following steps: carrying out precipitation reaction by taking sodium silicate and hydrochloric acid as raw materials to obtainSiO2Precipitating the SiO2Mixing the precipitate with ethanol to obtain alcohol-dispersed SiO2Sol; then drying and calcining are carried out to obtain nano silicon dioxide powder; adding linoleic acid and the nano silicon dioxide powder into a normal hexane solvent, and carrying out ultrasonic oscillation, stirring reaction, separation, washing and drying to obtain a linoleic acid modified nano silicon-based oxide; preferably, a nonionic surfactant is added to the reaction solution during the precipitation reaction.
6. The method of reducing isovaleric acid content of cigarette smoke according to any one of claims 1-4 wherein said aminated MOF material is NH2-MIL-101(Fe) MOF material; preferably, the preparation of the aminated MOF material comprises: mixing ferric trichloride, 2-amino terephthalic acid and dimethylformamide, carrying out hydrothermal reaction, washing and drying to obtain the compound; the mass-volume ratio of ferric trichloride, 2-amino terephthalic acid and dimethylformamide is 2-4 g: 0.5-1.5 g: 60-70 ml.
7. The method for reducing the content of isovaleric acid in cigarette smoke according to any one of claims 1 to 4, wherein the macroporous silica gel material is a mesoporous macroporous silica gel material; preferably, the specific surface area of the large-pore-volume silica gel material is 387m2In terms of/g, the mean pore diameter is 8.9 nm.
8. The method for reducing the isovaleric acid in the smoke of cigarette as claimed in any one of claims 1 to 7, wherein the functional composite cigarette filter is compounded from a feed cigarette filter and a pure acetate cigarette filter, and the feed cigarette filter is filled with the additive material.
9. The method for reducing isovaleric acid in cigarette smoke according to claim 8, wherein the length ratio of the feed cigarette filter stick to the pure acetate fiber cigarette filter stick is 1-2.5: 1, preferably 1.5-2: 1.
10. the method for reducing the content of isovaleric acid in cigarette smoke according to any one of claims 1 to 9, wherein the step of preparing the functional composite cigarette filter stick comprises the following steps: adding a large-pore-volume silica gel material, the aminated MOF material and the linoleic acid modified nano silicon-based oxide into a cigarette bundle according to a proportion to obtain a fed cigarette filter stick, and then compounding the fed cigarette filter stick with a pure acetate cigarette filter stick to prepare a functional composite cigarette filter stick; preferably, the method also comprises the step of mixing the linoleic acid modified nano silicon-based oxide with glycerol triacetate.
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