阅读说明：本技术 一种吸附卷烟烟气中2-丁酮的复合过滤嘴及卷烟 (Composite filter tip for adsorbing 2-butanone in cigarette smoke and cigarette ) 是由 周骏 徐同广 陈莉莎 张珍禛 王丽达 樊肇胜 王立云 常翔 周昭娟 林慧 于 2021-09-01 设计创作，主要内容包括：本发明涉及烟气中有害成分的去除技术领域,具体涉及一种吸附卷烟烟气中2-丁酮的复合过滤嘴及卷烟。本发明所述的过滤嘴包括通用吸附段和特异吸附段；所述特异吸附段上负载有炭气凝胶和亚油酸修饰的纳米硅基氧化物的混合物；所述普通吸附段和特异吸附段通过串联的方式共轴排列。本发明所述的复合过滤嘴对于卷烟烟气中的2-丁酮有非常理想的去除效果,可有效地降低卷烟的辛辣味,同时不会对烟气中的呈香物质造成损失,提升卷烟整体的口感。(The invention relates to the technical field of removal of harmful ingredients in smoke, in particular to a composite filter tip for adsorbing 2-butanone in cigarette smoke and a cigarette. The filter tip comprises a general adsorption section and a specific adsorption section; the specific adsorption section is loaded with a mixture of carbon aerogel and linoleic acid modified nano silicon-based oxide; the common adsorption section and the specific adsorption section are coaxially arranged in a serial connection mode. The composite filter tip has an ideal effect of removing 2-butanone in cigarette smoke, can effectively reduce the pungency of cigarettes, does not cause loss of aromatic substances in the smoke, and improves the overall taste of the cigarettes.)

1. A composite filter tip for adsorbing 2-butanone in cigarette smoke is characterized in that the composite filter tip comprises a general adsorption section and a specific adsorption section;

the specific adsorption section is loaded with a mixture of carbon aerogel and linoleic acid modified nano silicon-based oxide;

the common adsorption section and the specific adsorption section are coaxially arranged in a serial connection mode.

2. The composite filter according to claim 1, wherein the mass ratio of the carbon aerogel to the linoleic acid-modified nano silicon-based oxide is 1: 0.125 to 0.15.

3. A composite filter according to claim 1, wherein the carbon aerogel is prepared by a process comprising:

1) dissolving resorcinol and formaldehyde in deionized water, taking sodium carbonate as a catalyst, and taking SiO with the particle size of 80-120 nm₂As pore-forming agent, reacting to obtain wet gel;

2) aging the wet gel;

3) adding acetone into the aged wet gel to replace water in pores, drying at normal temperature and normal pressure to obtain organic aerogel, cracking the obtained organic aerogel into carbon aerogel in argon atmosphere, and using hydrofluoric acid to make SiO in the carbon aerogel₂And (5) removing.

4. The composite filter according to claim 1, wherein the linoleic acid modified nano silicon based oxide is prepared by the following method: adding linoleic acid and nano SiO into n-hexane solvent₂And (3) carrying out ultrasonic oscillation on the powder, and stirring for reaction to obtain the powder.

5. A composite filter according to claim 1, wherein the ratio of the lengths of the generic and specific adsorption segments is 1: 1 to 1.5.

6. A composite filter according to claim 1 or 5, wherein the mixture is added in an amount of 32 to 38 mg/piece;

and/or the addition amount of the mixture is 2-3 mg/mm.

7. The composite filter of claim 1, wherein the material of the general adsorbent section and the specific adsorbent section is acetate fiber.

8. A cigarette comprising a composite filter according to any one of claims 1 to 7.

9. The cigarette of claim 8, wherein the specific adsorbent section of the composite filter is proximate to a tobacco cut filler portion of the cigarette.

Technical Field

The invention relates to the technical field of removal of harmful ingredients in smoke, in particular to a composite filter tip for adsorbing 2-butanone in cigarette smoke and a cigarette.

Background

The sensory quality evaluation of the cigarette by the smoker is carried out by evaluating the comprehensive reflecting effect of the smoke generated after the cigarette is burnt, namely, the aroma components in the smoke generated after the cigarette is burnt, on the feeling of the smoker. The function of the oral cavity during smoking evaluation is to judge the irritation (pungency degree) of the smoke, roughness or fineness, hardness or softness of the smoke, thickness or lightness of the smoke, plumpness and aftertaste of the smoke. The cigarette evaluation depends on the throat, and the throat has the functions of judging the irritation of smoke (when the smoke flows to the front edge of the throat) and the strength of the smoke (when the smoke passes through the throat).

The sensory quality of the cigarettes is closely related to the types and concentrations of chemical components in smoke, the taste is also related to the threshold value of the chemical components, the types of compounds distributed in gas phase and particle phase substances of aerosol of the smoke of the cigarettes are thousands, and the compositions and the contents of the compounds have important influence on the sensory quality of the cigarettes. Some cigarettes often generate unpleasant sour taste, bitter taste, spicy taste, astringent taste and the like, researches show that volatile carbonyl compounds, phenolic compounds, ammonia and other substances with low molecular weight in smoke have stimulating effect, non-volatile organic acids have strong spicy, burning and rancidity smell at higher concentration, and the substances not only stimulate taste acceptance and sensory nerves of oral cavity, but also stimulate sensory nerve endings and have negative effect on the sensory quality of the cigarettes. The 2-butanone has special pungent smell, and shows strong irritation and obvious miscellaneous gas on the sensory quality of cigarette mainstream smoke.

With the change of the habit of smokers, cigarette products with lower irritation, mellow taste and clean aftertaste are increasingly popular with consumers, and therefore, how to reduce the content of 2-butanone in cigarette smoke becomes a hot point of research at present.

Disclosure of Invention

The invention provides a composite filter tip for adsorbing 2-butanone in cigarette smoke, which comprises a general adsorption section and a specific adsorption section;

the specific adsorption section is loaded with a mixture of carbon aerogel and linoleic acid modified nano silicon-based oxide;

the common adsorption section and the specific adsorption section are coaxially arranged in a serial connection mode.

The invention discovers that the 2-butanone in the cigarette smoke can be effectively adsorbed by adopting the mixture of the carbon aerogel and the linoleic acid modified nano silicon-based oxide as a specific adsorption material and matching with the structure of the composite filter tip, and meanwhile, the loss of other aroma components can not be caused, and the taste of the cigarette is improved.

Preferably, the mass ratio of the carbon aerogel to the linoleic acid modified nano silicon-based oxide is 1: 0.125 to 0.15. Under the relative dosage, the adsorbing material can play a better synergistic role, has a better adsorbing effect on the 2-butanone, and can not adsorb and remove other aromatic substances.

Preferably, the carbon aerogel is prepared by the following method:

1) dissolving resorcinol and formaldehyde in deionized water, taking sodium carbonate as a catalyst, and taking SiO with the particle size of 80-120 nm₂As pore-forming agent, reacting to obtain wet gel;

2) aging the wet gel;

3) adding acetone into the aged wet gel to replace water in pores, drying at normal temperature and normal pressure to obtain organic aerogel, cracking the obtained organic aerogel into carbon aerogel in argon atmosphere, and using hydrofluoric acid to make SiO in the carbon aerogel₂And (5) removing. The carbon aerogel has a three-dimensional porous network structure and has good adsorption capacity on polar or non-polar organic matters. By introducing SiO₂The pore diameter of the carbon aerogel material can be increased, and the selectivity of the carbon aerogel material to adsorbed substances is improved.

Preferably, the linoleic acid modified nano silicon-based oxide is prepared by the following method: adding linoleic acid and nano SiO into n-hexane solvent₂And (3) carrying out ultrasonic oscillation on the powder, and stirring for reaction to obtain the powder. The hydroxyl number on the surface of the linoleic acid modified nano silicon-based oxide is reduced, so that the linoleic acid modified nano silicon-based oxide is favorably dispersed in triacetyl glycerine serving as a filter stick plasticizer and is conveniently and uniformly added into acetate fibers.

Preferably, the length ratio of the general adsorption section to the specific adsorption section is 1-1.5: 1. Under the condition of the relative length, the adsorption effect of the specific adsorption section on the 2-butanone can be ensured, and the influence on the whole aroma of the smoke can be avoided.

Preferably, the addition amount of the mixture is 32-38 mg/count. The better adsorption effect can be ensured under the addition amount.

Preferably, the addition amount of the mixture is 2-3 mg/mm.

Preferably, the materials of the general adsorption section and the specific adsorption section are both acetate fibers.

In another aspect, the invention provides a cigarette comprising a composite filter according to the invention.

Preferably, the specific adsorption section of the composite filter is close to the tobacco shred part of the cigarette.

The invention has the following beneficial effects:

1) the composite filter tip has ideal removal effect on 2-butanone in cigarette smoke, and can effectively improve the taste of cigarettes and reduce the pungency of the cigarettes.

2) The composite filter tip only has obvious adsorption effect on the 2-butanone, has no obvious adsorption effect on other components in the cigarette, can keep the original style of the cigarette unchanged, improves and enhances the taste absorption quality to a certain extent, meets the physiological requirements of consumers, and enhances the competitiveness of products.

Drawings

FIG. 1 is a schematic structural view of a cigarette according to the present invention;

in the figure, 1 is a composite filter tip, 2 is a cigarette body, 3 is a general adsorption section, and 4 is a specific adsorption section.

Detailed Description

The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

The carbon aerogel referred to in the examples was prepared by the following method:

1) dissolving resorcinol and formaldehyde in deionized water, adding sodium carbonate as catalyst into the above solution, stirring to obtain uniform solution, and adding small amount of SiO about 100nm in sol-gel process₂As a pore-forming agent.

2) And transferring the uniform solution into a sealed container, standing and aging, adding acetone into the obtained wet gel to replace water in pores, and finally drying at normal temperature and normal pressure to obtain the organic aerogel.

3) Cracking the obtained organic aerogel in argon atmosphere to obtain carbon aerogel, and finally using hydrofluoric acid to make SiO in the carbon aerogel₂And removing to obtain the carbon aerogel with controlled pore structure.

The linoleic acid modified nano silicon-based oxide related in the embodiment is prepared by the following method:

adding linoleic acid and nano SiO into n-hexane solvent₂And (3) carrying out ultrasonic oscillation on the powder, and stirring for reaction to obtain the powder.

The linoleic acid and the nano SiO₂The mass ratio of the powder is 9: 100.

Example 1

The embodiment relates to a composite cigarette filter, which has the following structure:

the composite filter tip comprises a general adsorption section and a specific adsorption section;

the specific adsorption section is loaded with a mixture of carbon aerogel and linoleic acid modified nano silicon-based oxide;

the common adsorption section and the specific adsorption section are coaxially arranged in a serial connection mode.

The mass ratio of the carbon aerogel to the linoleic acid modified nano silicon-based oxide is 1: 0.125.

the preparation method of the composite filter tip comprises the following steps:

mixing carbon aerogel and plasticizer triacetin dispersed with linoleic acid modified nano silicon-based oxide, adding plasticizer 8% of the weight of the filter stick, adding into cigarette tow to obtain specific adsorption section, and compounding with acetate fiber to obtain functional composite cigarette filter tip.

The length of the specific adsorption section in the composite filter tip is 15mm, and the length of the general adsorption section is 10 mm;

the addition amount of the carbon aerogel and the linoleic acid modified nano silicon-based oxide in the acetate fiber is 3 mg/mm.

The embodiment also relates to a cigarette provided with the composite cigarette filter, and the structural schematic diagram is shown in figure 1, wherein 1 is the composite filter, 2 is a cigarette body, 3 is a general adsorption section, and 4 is a specific adsorption section. Wherein the length of the cigarette is 84mm +/-0.5 mm, the circumference is 24.35 +/-0.2 mm, and the specific adsorption section of the filter tip is close to the cut tobacco of the cigarette.

Example 2

The embodiment relates to a composite cigarette filter, which has the following structure:

the composite filter tip comprises a general adsorption section and a specific adsorption section;

the specific adsorption section is loaded with a mixture of carbon aerogel and linoleic acid modified nano silicon-based oxide;

the common adsorption section and the specific adsorption section are coaxially arranged in a serial connection mode.

The mass ratio of the carbon aerogel to the linoleic acid modified nano silicon-based oxide is 1: 0.15.

the preparation method of the composite filter tip comprises the following steps:

mixing carbon aerogel and plasticizer triacetin dispersed with linoleic acid modified nano silicon-based oxide, adding plasticizer 8% of the weight of the filter stick, adding into cigarette tow to obtain specific adsorption section, and compounding with acetate fiber to obtain functional composite cigarette filter tip.

The length of the specific adsorption section in the composite filter tip is 20mm, and the length of the general adsorption section is 10 mm.

The addition amount of the macroporous silica gel, the carbon aerogel and the linoleic acid modified nano silicon-based oxide in the acetate fiber is 2 mg/mm.

The embodiment also relates to a cigarette provided with the composite cigarette filter, the length of the cigarette is 94mm plus or minus 0.5mm, the circumference of the cigarette is 21.80 plus or minus 0.2mm, and the specific adsorption section of the filter is close to the cut tobacco of the cigarette.

Comparative example 1

Compared with the embodiment 1, the difference is that the mixture added by the composite filter tip is replaced by the mixture of activated carbon and linoleic acid modified nano silicon-based oxide.

Comparative example 2

Compared with the example 1, the cigarette is different in that the cigarette does not adopt a composite filter tip, adopts a common filter tip prepared by acetate fiber, and has the same specification as the example 1.

Comparative example 3

Compared with the example 2, the cigarette is different in that the cigarette does not adopt a composite filter tip, adopts a common filter tip prepared from acetate fiber, and has the same specification as the example 2.

Experimental example 1

The experimental example relates to a method for detecting effective components in cigarette smoke in the experimental example, which comprises the following steps:

the content of the 2-butanone in the cigarette smoke is detected by a method of YC/T254-: the particulate matter of the mainstream smoke was collected with a glass fiber filter impregnated with 2, 4-dinitrophenylhydrazine, transferred to a 100mL conical flask, extracted with 50mL pyridine/acetonitrile solution, mechanically shaken, allowed to stand, filtered through a 0.45 μm membrane, and transferred to a 2mL chromatography flask for HPLC analysis. Analysis conditions were as follows: mobile phase A: water/acetonitrile/tetrahydrofuran/isopropanol (59:30:10:1), mobile phase B: water/acetonitrile (35: 65); column temperature: 30 ℃; column flow rate: 0.8 mL/min; sample introduction volume: 5 mu L of the solution; gradient: and (3) 0 minute: 100% of mobile phase A and 0% of mobile phase B; 20 minutes: mobile phase A60% and B40%; diode array detector detection wavelength: 365 nm.

The results are shown in tables 1 and 2:

TABLE 1

TABLE 2

From the above data, it is clear that 2-butanone can be effectively adsorbed with the composite filter according to the present invention.

Experimental example 2

The sensory evaluation of the cigarettes of the examples and comparative examples was carried out in accordance with tobacco industry Standard YC/T138-1998 sensory evaluation methods for tobacco and tobacco products, and the results are shown in Table 3.

TABLE 3

The 2-butanone has strong spicy smell when the concentration is higher, and reflects that stronger irritation and obvious miscellaneous gas 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 miscellaneous gas and the aftertaste are all 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.

Although the invention has been described in detail hereinabove by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that many modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.