Composite material for reducing cigarette smoke temperature, preparation method and application thereof
By combining a composite material composed of attapulgite powder, alumina and aluminum nitride with nanofiber winding technology, the problems of complexity and high cost of existing tobacco cooling materials are solved, achieving safe and effective reduction of smoke temperature and improvement of smoking quality.
Patent Information
- Application Number
- CN202311070224.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-23
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2043-08-23
AI Technical Summary
Existing tobacco cooling materials are complex to prepare and costly, and have an adsorption effect on the aroma components of smoke, affecting the smoking quality of heated cigarettes and making them difficult to produce on a large scale.
Attapulgite powder, alumina and aluminum nitride are used as components of the composite material. A nanofiber-wrapped cylindrical precursor is prepared through extrusion and spinning technology, and combined with a high molecular polymer to form a cooling material. The adsorption properties of the attapulgite powder and the thermal conductivity of alumina and aluminum nitride are used to reduce the flue gas temperature.
It can safely and effectively reduce the smoke temperature and maintain the smoke concentration unchanged. The material has high stability and is suitable for heated cigarette products to improve the smoking quality.
Smart Images
Figure CN116898135B_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of filtering and cooling materials, and in particular relates to a composite material for reducing the temperature of cigarette smoke, a preparation method and an application thereof. Background Art
[0002] In 1900, the modern cigarette appeared. Cigarette-making technology was further refined, with steam-powered cigarette-rolling machines shredding tobacco and rolling it into cylindrical cigarettes. Throughout the 20th century, cigarettes became increasingly popular, becoming a part of everyday life. As smoking became more widespread, the quality and taste of cigarettes continued to improve. In the 21st century, cigarettes remain a widely used tobacco product.
[0003] The smoke produced by tobacco combustion reaches temperatures as high as 1000°C and contains a variety of harmful gases, such as carbon monoxide and nitrogen oxides. Smoking increases the risk of various health conditions, including cardiovascular disease, cancer, and respiratory illnesses, while also polluting the environment. Heated cigarettes do not burn tobacco; instead, they heat the tobacco material, extracting nicotine and flavor compounds to satisfy smokers' cravings. Consequently, heated cigarettes reduce the harmful components produced by high-temperature tobacco combustion and cracking, significantly reducing the release of chemical components in mainstream smoke and making them less harmful than traditional cigarettes. Furthermore, unlike conventional cigarettes that smolder, heated cigarettes remain in a non-burning state between puffs, significantly reducing sidestream and ambient smoke, minimizing the impact on the public environment and, to a certain extent, alleviating the conflict between smoking and public smoking bans. Due to the short length of heated cigarettes, the smoke temperature at the inlet is too hot. Therefore, a material that can reduce the temperature of tobacco smoke is needed to address the issue of heated cigarette smoke burning.
[0004] Cigarette cooling materials refer to materials that can lower the temperature of cigarettes. They possess strong heat absorption and rapid cooling rates. They can lower the burning temperature of cigarettes, reduce the production of smoke and harmful substances, and benefit smokers' health. Cigarette cooling materials can be made from a variety of materials, such as activated carbon, nanomaterials, and polymers. They can also be chemically or physically processed into various shapes and sizes, such as powders, granules, and fibers. These materials can be added directly to tobacco or filter rods to create a variety of different cigarette products. Furthermore, adjustments to the cigarette structure can be made to enhance the smoke cooling effect, such as utilizing cavities to buffer heat storage, lengthening the smoke channel, and enhancing heat exchange between the smoke and the external environment.
[0005] Traditional tobacco smoke cooling materials primarily include activated carbon and nanocarbon materials. These materials have a large specific surface area and porosity, allowing them to rapidly absorb high-temperature harmful gases and heat from tobacco smoke, reducing the smoke temperature. However, the preparation of these materials is complex, costly, and difficult to mass-produce. Furthermore, these materials partially adsorb flavor components in smoke. Especially when used in heated cigarettes, they can adsorb glycerin in the smoke, reducing smoke production and smoke concentration, leading to a decrease in smoking quality.
[0006] In summary, the research on a safe and efficient tobacco cooling material can effectively reduce the smoke temperature without affecting the smoke concentration. The material has high stability and good safety, which has great practical significance for improving the quality of heated cigarette products. Summary of the Invention
[0007] In view of the deficiencies of the prior art, the present invention aims to provide a composite material for reducing the temperature of cigarette smoke and a preparation method thereof.
[0008] To achieve this object, the present invention adopts the following technical solutions:
[0009] In a first aspect, the present invention provides a composite material for reducing the temperature of cigarette smoke, wherein the composite material for reducing the temperature of cigarette smoke comprises a cylindrical precursor and nanofibers wrapped around the surface of the cylindrical precursor, wherein the raw materials for preparing the cylindrical precursor comprise attapulgite powder, alumina and water, and the raw materials for preparing the nanofibers comprise a high molecular polymer, aluminum nitride and water.
[0010] The present invention creatively develops a composite material for reducing cigarette smoke temperature. The attapulgite powder, aluminum oxide, and aluminum nitride added to the composite material are chemically stable and harmless to the human body. The aluminum oxide and aluminum nitride, as heat-conducting components, have excellent thermal conductivity, effectively transferring heat to the cooling material. The attapulgite powder in the cooling material absorbs a certain amount of moisture, efficiently absorbing this heat and cooling the smoke. Furthermore, the attapulgite powder has a strong adsorption capacity for water, which can absorb and immobilize water vapor in the smoke, further reducing the smoke temperature.
[0011] Preferably, the high molecular weight polymer is selected from any one of polyvinyl alcohol, polyamide or polyacrylonitrile; more preferably, polyvinyl alcohol.
[0012] Preferably, the mass ratio of attapulgite powder, alumina, high molecular polymer and aluminum nitride in the raw materials for preparing the composite material for reducing cigarette smoke temperature is (18-22):(5-8):(0.5-1.5):(1-3).
[0013] When the carrier, internal heat transfer agent, high molecular polymer and external heat conductor in the preparation raw materials of the composite material for reducing cigarette smoke temperature described in this application meet the above-mentioned specific proportion relationship, the composite material for reducing cigarette smoke temperature obtained has the best effect of reducing smoke temperature.
[0014] The specific point values in the above 18-22 can be 18, 19, 20, 20.5, 21, 22, etc. The specific point values within the above numerical range can be selected and will not be described one by one here.
[0015] The specific point values in the above 5-8 can be 5, 5.5, 6, 6.5, 7, 7.5, 8, etc. The specific point values within the above numerical range can be selected and will not be detailed here.
[0016] The specific point values of 0.5-1.5 can be 0.5, 0.7, 0.9, 1, 1.2, 1.5, etc. The specific point values within the above numerical range can be selected and will not be described one by one here.
[0017] The specific point values of 1-3 can be 1, 1.5, 1.7, 2, 2.5, 2.8, 3, etc. The specific point values within the above numerical range can be selected and will not be detailed here.
[0018] In a second aspect, the present invention provides a method for preparing a composite material for reducing cigarette smoke temperature, the preparation method comprising the following steps:
[0019] (1) Attapulgite powder, alumina and deionized water are mixed and extruded to obtain a cylindrical precursor; a polymer, water and aluminum nitride are mixed to obtain nanofibers;
[0020] (2) mixing the nanofibers and the cylindrical precursor and calcining them to obtain a cylindrical cooling material precursor;
[0021] (3) The cylindrical cooling material precursor obtained in step (2) absorbs moisture and is then dried to obtain the composite material for reducing the temperature of cigarette smoke.
[0022] The preparation method specifically comprises the following steps:
[0023] (1) Attapulgite powder, alumina, and deionized water are mixed and extruded through an extruder to obtain a cylindrical precursor; a mixed solution of a polymer, water, and aluminum nitride is prepared under heating and stirring conditions, and the mixed solution is introduced into a microfluidic electrostatic integrated machine using a microfluidic pump syringe, and the microfluidic electrostatic integrated machine is used for spinning to form polymer nanofibers containing aluminum nitride;
[0024] (2) winding the high molecular polymer nanofibers obtained in step (1) around the outer surface of the cylindrical material precursor obtained in step (1), and then calcining in a nitrogen atmosphere to obtain a cylindrical cooling material precursor;
[0025] (3) The cylindrical cooling material precursor obtained in step (2) absorbs moisture and is then dried to obtain the composite material for reducing the temperature of cigarette smoke.
[0026] Preferably, the mass ratio of the attapulgite powder, water and alumina in step (1) is (18-21):(5-8):(5-8).
[0027] The specific point values within the range of 18-21 in step (1) can be 18, 18.5, 18.8, 19, 19.5, 20, 21, etc. The specific point values within the above numerical range can be selected and will not be described in detail here.
[0028] The specific point values of 5-8 in step (1) are independently selected from 5, 5.5, 6, 6.5, 7, 7.5, 8, etc. The specific point values within the above numerical range can be selected and will not be repeated here.
[0029] Preferably, the extrusion pressure of the extruder in step (1) is 3-5 MPa, and the extrusion diameter is 6-8 mm.
[0030] The extrusion pressure of the extruder in step (1) can be 3MPa, 3.2MPa, 3.5MPa, 4MPa, 4.5MPa, 5MPa, etc. Specific values within the above numerical range can be selected and will not be described here one by one.
[0031] The diameter in step (1) can be 6 mm, 6.3 mm, 6.6 mm, 7 mm, 7.5 mm, 8 mm, etc. Specific values within the above numerical range can be selected and will not be described in detail here.
[0032] Preferably, the mass ratio of the high molecular weight polymer, water and aluminum nitride in step (1) is (0.5-1.5):(5-8):(1-3);
[0033] The specific point values in the above 5-8 can be 5, 5.5, 6, 6.5, 7, 7.5, 8, etc. The specific point values within the above numerical range can be selected and will not be detailed here.
[0034] The specific point values of 0.5-1.5 can be 0.5, 0.7, 0.9, 1, 1.2, 1.5, etc. The specific point values within the above numerical range can be selected and will not be described one by one here.
[0035] The specific point values of 1-3 can be 1, 1.5, 1.7, 2, 2.5, 2.8, 3, etc. The specific point values within the above numerical range can be selected and will not be detailed here.
[0036] Preferably, the high molecular weight polymer, water and aluminum nitride in step (1) are mixed at 60-80° C., at a stirring rate of 700-900 r / min, and stirred for 2-3 h.
[0037] The specific point values of the stirring temperature of 60-80°C are 60°C, 63°C, 65°C, 67°C, 70°C, 73°C, 76°C, 78°C, 80°C, etc.
[0038] Specific point values of the stirring rate of 700-900 r / min are 700 r / min, 750 r / min, 800 r / min, 850 r / min, 880 r / min, 900 r / min, etc.
[0039] The specific value of the stirring time of 2-3h can be 2h, 2.2h, 2.4h, 2.6h, 2.8h, 3h, etc.
[0040] Any specific point value within the above numerical range can be selected, and will not be described in detail here.
[0041] Preferably, the nanofibers in step (1) are prepared by a microfluidic electrostatic integration machine.
[0042] Preferably, the voltage of the microfluidic electrostatic integrated machine is 15-25 kV.
[0043] The voltage of the microfluidic electrostatic integrated machine can be 15kV, 17kV, 19kV, 20kV, 23kV, 25kV, etc. Specific values within the above numerical range can be selected and will not be detailed here.
[0044] Preferably, the microfluidic electrostatic integrated machine uses a microfluidic pump syringe to introduce the mixed liquid into the microfluidic electrostatic integrated machine at a rate of 0.5-1.5 ml / h.
[0045] The rate of introducing the mixed solution by the microfluidic pump syringe can be 0.5 ml / h, 0.7 ml / h, 0.9 ml / h, 1 ml / h, 1.2 ml / h, 1.5 ml / h, etc. Specific values within the above numerical range can be selected and will not be described in detail here.
[0046] Preferably, the calcination in step (2) is carried out under a nitrogen atmosphere.
[0047] Preferably, the nitrogen gas flow rate in the nitrogen atmosphere is (40-60) ml / min.
[0048] The nitrogen gas flow rate can be 40 ml / min, 45 ml / min, 50 ml / min, 53 ml / min, 55 ml / min, 58 ml / min, 60 ml / min, etc. Specific values within the above numerical range can be selected and will not be detailed here.
[0049] Preferably, the calcination temperature is 500-700°C.
[0050] The calcination temperature may be 500° C., 520° C., 550° C., 580° C., 600° C., 680° C., 700° C., etc. Specific values within the above numerical range can be selected and will not be detailed here.
[0051] Preferably, the roasting time is 4-6 hours.
[0052] The calcination time can be 4 hours, 4.3 hours, 4.6 hours, 5 hours, 5.5 hours, 5.8 hours, 6 hours, etc. Specific values within the above numerical range can be selected and will not be described in detail here.
[0053] Preferably, the moisture absorption in step (3) is carried out in a constant temperature and humidity chamber.
[0054] Preferably, the temperature of the constant temperature and humidity chamber is 40-60° C., the humidity is 3%-5%, and the constant temperature and humidity time is 5-10 minutes.
[0055] The temperature of the constant temperature and humidity chamber can be 40° C., 42° C., 45° C., 50° C., 55° C., 58° C., 60° C., etc. Specific values within the above numerical range can be selected and will not be described in detail here.
[0056] The humidity of the constant temperature and humidity chamber can be 3%, 3.2%, 3.5%, 4%, 4.5%, 5%, etc. Specific values within the above numerical range can be selected and will not be described in detail here.
[0057] The constant temperature time can be 5 min, 6 min, 7 min, 8 min, 9 min, 10 min, etc. Specific values within the above numerical range can be selected, and they will not be described here one by one.
[0058] Preferably, the drying in step (3) is performed at 40-60° C. for 15-30 minutes.
[0059] The drying temperature can be 40° C., 42° C., 45° C., 50° C., 55° C., 58° C., 60° C., etc. Specific values within the above numerical range can be selected, and will not be described in detail here.
[0060] The drying time can be 15 min, 18 min, 20 min, 24 min, 28 min, 30 min, etc. Specific values within the above numerical range can be selected, and will not be described in detail here.
[0061] In a third aspect, the present invention provides use of a composite material for reducing cigarette smoke temperature in the preparation of cigarettes.
[0062] Compared with the prior art, the present invention has the following beneficial effects:
[0063] The present invention creatively develops a composite material for reducing cigarette smoke temperature. The attapulgite powder, aluminum oxide, and aluminum nitride added to the composite material are chemically stable and harmless to the human body. The aluminum oxide and aluminum nitride, as heat-conducting components, have excellent thermal conductivity, effectively transferring heat to the cooling material. The attapulgite powder in the cooling material absorbs a certain amount of moisture, efficiently absorbing this heat and cooling the smoke. Furthermore, the attapulgite powder has a strong adsorption capacity for water, which can absorb and immobilize water vapor in the smoke, further reducing the smoke temperature. BRIEF DESCRIPTION OF THE DRAWINGS
[0064] Figure 1 This is a graph showing the cooling performance of the composite material prepared in Example 1;
[0065] Figure 2 This is a graph showing the cooling performance of the composite material prepared in Example 2;
[0066] Figure 3 This is a graph showing the cooling performance of the composite material prepared in Example 3;
[0067] Figure 4 This is a graph showing the cooling performance of the composite material prepared in Example 4;
[0068] Figure 5 This is a graph showing the cooling performance of the composite material prepared in Example 5;
[0069] Figure 6 This is a graph showing the cooling performance of the composite material prepared in Example 6;
[0070] Figure 7 This is a graph showing the cooling performance of the composite material prepared in Comparative Example 1.
[0071] Figure 8 This is a graph showing the test results of the original cigarette described in Comparative Example 2. DETAILED DESCRIPTION
[0072] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific embodiments. It should be understood by those skilled in the art that the embodiments are merely to help understand the present invention and should not be regarded as specific limitations of the present invention.
[0073] The sources of some components in the following examples and comparative examples are as follows: attapulgite powder is derived from product model S28335 of Shanghai Yuanye Biotechnology Co., Ltd., polyvinyl alcohol is derived from product model 3301200KA of Shanghai Aladdin Biochemical Technology Co., Ltd., polyamide is derived from product model P128923 of Shanghai Aladdin Biochemical Technology Co., Ltd., and polyacrylonitrile is derived from product model P303197 of Shanghai Aladdin Biochemical Technology Co., Ltd.
[0074] The extruder is an MT19 model instrument produced by Guangzhou Har Technology Co., Ltd., and the microfluidic electrostatic integrated machine is an IBT-ME-S(M) model instrument produced by Nanjing Bell Times Technology Co., Ltd.
[0075] Example 1
[0076] This embodiment provides a cylindrical tobacco smoke cooling material, the preparation method of which is as follows:
[0077] (1) Preparation of cylindrical substrate
[0078] 22 g of attapulgite powder, 8 g of deionized water, and 8 g of alumina were added to a beaker, stirred evenly to obtain a mixture, and then the mixture was placed in an extruder at an extrusion pressure of 3 MPa and an extrusion diameter of 7 mm to obtain a cylindrical material precursor;
[0079] (2) In-situ growth of aluminum nitride
[0080] Polyvinyl alcohol, deionized water and aluminum nitride, with masses of 1.5 g, 8 g and 1.5 g respectively, were stirred at 700 r / min at 60° C. for 2 h to obtain a mixed solution, and the mixed solution was introduced into a microfluidic electrostatic integrated machine at a rate of 0.5 ml / h using a microfluidic pump syringe, and the mixed solution was spun by the microfluidic electrostatic integrated machine at a voltage of 15 kV to form polymer nanofibers containing aluminum nitride, and the polymer nanofibers were wound around the outer surface of the cylindrical material precursor obtained in step (1), and then calcined at 500° C. for 4 h at a nitrogen gas flow rate of 40 ml / min to obtain a cylindrical cooling material precursor;
[0081] (3) Introduction of water
[0082] The cylindrical cooling material precursor obtained in step (2) is placed in a constant temperature and humidity chamber at a humidity of 3% and a temperature of 40°C for 5 minutes to allow the material to absorb a certain amount of moisture. The material is then placed in an oven and dried at a low temperature of 40°C for 15 minutes to finally obtain a cylindrical tobacco smoke cooling material.
[0083] Example 2
[0084] This embodiment provides a cylindrical tobacco smoke cooling material, the preparation method of which is as follows:
[0085] (1) Preparation of cylindrical substrate
[0086] 18 g of attapulgite powder, 5 g of deionized water, and 5 g of alumina were added to a beaker, stirred evenly, and the mixture was placed in an extruder at an extrusion pressure of 3 MPa and an extrusion diameter of 7 mm to obtain a cylindrical material precursor.
[0087] (2) In-situ growth of aluminum nitride
[0088] Polyvinyl alcohol, deionized water and aluminum nitride with masses of 0.5 g, 5 g and 0.5 g respectively were stirred at 700 r / min at 60° C. for 2 h to obtain a mixed solution, and the mixed solution was introduced into a microfluidic electrostatic integrated machine at a rate of 0.5 ml / h using a microfluidic pump syringe, and the mixed solution was spun by the microfluidic electrostatic integrated machine at a voltage of 15 kV to form a polymer nanofiber containing aluminum nitride, and the polymer nanofiber was wound around the outer surface of the cylindrical material precursor obtained in step (1), and then calcined at 500° C. for 4 h at a nitrogen gas flow rate of 40 ml / min to obtain a cylindrical cooling material precursor;
[0089] (3) Introduction of water
[0090] The cylindrical cooling material precursor obtained in step (2) is placed in a constant temperature and humidity chamber at a humidity of 3% and a temperature of 40°C for 5 minutes to allow the material to absorb a certain amount of moisture. The material is then placed in an oven and dried at a low temperature of 40°C for 15 minutes to finally obtain a cylindrical tobacco smoke cooling material.
[0091] Example 3
[0092] This embodiment provides a cylindrical tobacco smoke cooling material, the preparation method of which is as follows:
[0093] (1) Preparation of cylindrical substrate
[0094] 20 g of attapulgite powder, 6.5 g of deionized water, and 6.5 g of alumina were added to a beaker, stirred evenly, and the mixture was placed in an extruder at an extrusion pressure of 3 MPa and an extrusion diameter of 7 mm to obtain a cylindrical material precursor.
[0095] (2) In-situ growth of aluminum nitride
[0096] Polyvinyl alcohol, deionized water and aluminum nitride, with masses of 1 g, 6.5 g and 1 g respectively, were stirred at 700 r / min at 60° C. for 2 h to obtain a mixed solution, and the mixed solution was introduced into a microfluidic electrostatic integrated machine at a rate of 0.5 ml / h using a microfluidic pump syringe, and the mixed solution was spun by the microfluidic electrostatic integrated machine at a voltage of 15 kV to form polymer nanofibers containing aluminum nitride, and the polymer nanofibers were wound around the outer surface of the cylindrical material precursor obtained in step (1), and then calcined at 500° C. for 4 h at a nitrogen gas flow rate of 40 ml / min to obtain a cylindrical cooling material precursor;
[0097] (3) Introduction of water
[0098] The cylindrical cooling material precursor obtained in step (2) is placed in a constant temperature and humidity chamber at a humidity of 3% and a temperature of 40°C for 5 minutes to allow the material to absorb a certain amount of moisture. The material is then placed in an oven and dried at a low temperature of 40°C for 15 minutes to finally obtain a cylindrical tobacco smoke cooling material.
[0099] Example 4
[0100] This embodiment provides a cylindrical tobacco smoke cooling material. The preparation method thereof is the same as that of Example 1 except that the extrusion pressure of the extruder is changed to 8 MPa.
[0101] Example 5
[0102] This embodiment provides a cylindrical tobacco smoke cooling material. The preparation method thereof is different from that of Example 1 in that the nitrogen atmosphere in step (2) is replaced with an oxygen atmosphere, while other conditions remain unchanged. The preparation method is the same as that of Example 1.
[0103] Example 6
[0104] This embodiment provides a cylindrical tobacco smoke cooling material. The preparation method thereof is different from that of Example 1 in that the temperature of the low-temperature drying in step (3) is changed to high-temperature drying at 100°C. Other conditions remain unchanged, and the preparation method is the same as that of Example 1.
[0105] Comparative Example 1
[0106] This embodiment provides a cylindrical tobacco smoke cooling material, the preparation method of which is as follows:
[0107] (1) Preparation of cylindrical cooling material precursor
[0108] 22 g, 16 g, 8 g, 1.5 g, and 1.5 g of attapulgite powder, deionized water, alumina, polyvinyl alcohol, and aluminum nitride were added to a beaker, stirred evenly, and then the mixture was placed in an extruder at an extrusion pressure of 3 MPa and an extrusion diameter of 7 mm to obtain a cylindrical material precursor; then, the mixture was calcined at 500 ° C for 4 h at a nitrogen gas flow rate of 40 ml / min to obtain a cylindrical cooling material precursor;
[0109] (2) Introduction of water
[0110] The cylindrical cooling material precursor obtained in step (2) is placed in a constant temperature and humidity chamber at a humidity of 3% and a temperature of 40°C for 5 minutes to allow the material to absorb a certain amount of moisture. The material is then placed in an oven and dried at a low temperature of 40°C for 15 minutes to finally obtain a cylindrical tobacco smoke cooling material.
[0111] Application Examples 1-6
[0112] The composite materials prepared in the above Examples 1-6 were prepared into cigarettes. The cigarettes were composed of a composite of a fiber acetate segment, a cavity firmware cooling segment, and a tobacco material smoking segment. The cavity firmware of the cooling segment contained the composite materials prepared in Examples 1-6. The smoke temperature of the heated cigarettes was tested.
[0113] Comparative Application Example 1
[0114] The composite material prepared in Comparative Example 1 was prepared into cigarettes, wherein the cigarette was composed of a acetate fiber section, a cavity firmware cooling section, and a tobacco material smoking section. The cavity firmware of the cooling section contained the composite material prepared in Comparative Example 1, and the smoke temperature of the heated cigarette was tested.
[0115] Comparative Application Example 2
[0116] This comparative application example 2 provides a raw cigarette (i.e., an original cigarette without adding a cooling material), and performs a smoke temperature test on the raw cigarette.
[0117] Test Case
[0118] Cigarettes prepared according to Examples 1-6 and Comparative Examples 1-2 were tested for smoke temperature. The testing method involved simulating smoking according to the cigarette puffing pattern specified in National Standard YC / T29-1996. A K-type thermocouple temperature detector was used to measure the temperature at the center of the cigarette filter rod, 2 mm from the mouth end, during puffing. Nine puffs were simulated, each puff lasting 30 seconds, and the highest temperature was recorded. The test results for the above Examples and Comparative Examples are shown in Table 1.
[0119] Table 1
[0120] Group Temperature / ℃ Example 1 42.7 Example 2 47.4 Example 3 45.6 Example 4 60.4 Example 5 61.9 Example 6 62.8 Comparative Application Example 1 64.6 Comparative Application Example 2 67.2
[0121] Among them, the temperature test results of the original cigarette during the smoking process are shown in the figure below: Figure 8 The temperature test results of the cigarettes including the cooling materials provided in Examples 1-6 (Application Examples 1-6) during the smoking process are shown in FIG. Figure 1-6 As shown; the results of Examples 1-3 show that the internal heat transfer agent and the external heat conductor in the composite material for reducing the temperature of cigarette smoke have good thermal conductivity as heat-conducting components, which can fully transfer heat to the cooling material, and the carrier in the cooling material adsorbs a certain amount of moisture, which can efficiently absorb heat to cool the smoke. At the same time, the carrier has extremely strong adsorption properties for water, which can adsorb and fix the water vapor in the smoke, further reducing the smoke temperature. Compared with Examples 1-3, the low-temperature drying temperature during the preparation of the cooling material in Example 6 was changed to 100°C, and the water molecules introduced into the obtained cooling material were completely dried by the high-temperature conditions, the internal heat absorption performance of the substrate decreased, and the cooling effect of the material was poor; and in Example 4, the extrusion pressure of the extruder was changed to 8MPa during the preparation of the cooling material. The cylindrical substrate was subjected to too high an extrusion pressure, the internal pores of the substrate were severely damaged, and the cooling effect of the material was poor. Compared with Examples 1-3, the temperature test results of the material made in Comparative Example 1 (Comparative Application Example 1) are as follows Figure 7 As shown, the material described in comparative application example 1 does not have an excellent thermal conductive structure due to the one-piece molding, and the flue gas temperature is relatively high.
[0122] The applicant declares that the present invention uses the above-described embodiments to illustrate the detailed process flow of the present invention, but the present invention is not limited to the above-described detailed process flow, that is, it does not mean that the present invention must rely on the above-described detailed process flow to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent replacements for various raw materials in the products of the present invention, addition of auxiliary ingredients, and selection of specific methods, etc., are all within the scope of protection and disclosure of the present invention.
Claims
1. A composite material for reducing cigarette smoke temperature, characterized in that: The composite material for reducing cigarette smoke temperature includes a cylindrical precursor and nanofibers wrapped around the surface of the cylindrical precursor. The raw materials for preparing the cylindrical precursor include attapulgite powder, aluminum oxide and water. The raw materials for preparing the nanofibers include high molecular polymer, aluminum nitride and water.
2. The composite material for reducing cigarette smoke temperature according to claim 1, characterized in that: The high molecular polymer is selected from any one of polyvinyl alcohol, polyamide or polyacrylonitrile.
3. The composite material for reducing cigarette smoke temperature according to claim 2, characterized in that: The high molecular polymer is polyvinyl alcohol.
4. The composite material for reducing cigarette smoke temperature according to claim 1, characterized in that: The mass ratio of attapulgite powder, alumina, high molecular polymer and aluminum nitride in the composite material for reducing cigarette smoke temperature is (18-22):(5-8):(0.5-1.5):(1-3).
5. A method for preparing a composite material for reducing cigarette smoke temperature, characterized in that: The preparation method comprises the following steps: (1) Attapulgite powder, alumina and deionized water are mixed and extruded to obtain a cylindrical precursor; a polymer, water and aluminum nitride are mixed to obtain nanofibers; (2) mixing the nanofibers and the cylindrical precursor and calcining them to obtain a cylindrical cooling material precursor; (3) The cylindrical cooling material precursor obtained in step (2) absorbs moisture and is then dried to obtain the composite material for reducing the temperature of cigarette smoke.
6. The method for preparing a composite material for reducing cigarette smoke temperature according to claim 5, characterized in that: The mass ratio of the attapulgite powder, water and alumina in step (1) is (18-21):(5-8):(5-8).
7. The method for preparing a composite material for reducing cigarette smoke temperature according to claim 5, characterized in that: The extrusion pressure of the extruder in step (1) is 3-5 MPa, and the extrusion diameter is 6-8 mm.
8. The method for preparing a composite material for reducing cigarette smoke temperature according to claim 5, characterized in that: The mass ratio of the high molecular weight polymer, water and aluminum nitride in step (1) is (0.5-1.5):(5-8):(1-3).
9. The method for preparing a composite material for reducing cigarette smoke temperature according to claim 5, characterized in that: The high molecular weight polymer, water and aluminum nitride in step (1) are mixed at 60-80° C. and a stirring rate of 700-900 r / min for 2-3 hours.
10. The method for preparing a composite material for reducing cigarette smoke temperature according to claim 5, characterized in that: The nanofibers described in step (1) are prepared by a microfluidic electrostatic integrated machine.
11. The method for preparing a composite material for reducing cigarette smoke temperature according to claim 10, characterized in that: The voltage of the microfluidic electrostatic integrated machine is 15-25 kV.
12. The method for preparing a composite material for reducing cigarette smoke temperature according to claim 10, characterized in that: The microfluidic electrostatic integrated machine uses a microfluidic pump syringe to introduce the mixed liquid into the microfluidic electrostatic integrated machine at a rate of 0.5-1.5 ml / h.
13. The method for preparing a composite material for reducing cigarette smoke temperature according to claim 5, characterized in that: The calcination in step (2) is carried out under a nitrogen atmosphere.
14. The method for preparing a composite material for reducing cigarette smoke temperature according to claim 13, characterized in that: The nitrogen gas flow rate in the nitrogen atmosphere is (40-60) ml / min.
15. The method for preparing a composite material for reducing cigarette smoke temperature according to claim 13, characterized in that: The calcination temperature is 500-700°C and the calcination time is 4-6h.
16. The method for preparing a composite material for reducing cigarette smoke temperature according to claim 5, characterized in that: The moisture absorption in step (3) is carried out in a constant temperature and humidity chamber.
17. The method for preparing a composite material for reducing cigarette smoke temperature according to claim 16, characterized in that: The temperature of the constant temperature and humidity box is 40-60° C., the humidity is 3%-5%, and the constant temperature and humidity time is 5-10 minutes.
18. The method for preparing a composite material for reducing cigarette smoke temperature according to claim 5, characterized in that: The drying in step (3) is performed at 40-60° C. for 15-30 minutes.
19. Use of the composite material for reducing cigarette smoke temperature according to any one of claims 1 to 4 in the preparation of cigarettes.