A cooling composite membrane material composition, a cooling composite membrane material, and a preparation method and application thereof

Abstract

The present invention relates to the field of composite membrane materials, specifically to a cooling composite membrane material composition, a cooling composite membrane material, a preparation method, and applications thereof. The composite membrane material composition contains the following components, either separately or in combination: water, a biomass phase change material, glycerin, a modifier, a humidifier, and a thermal insulation component. The cooling composite membrane material provided by the present invention has a significant cooling effect, and the raw materials are safe, environmentally friendly, widely available, and simple to prepare.

Description

Technical Field

[0001] The present invention relates to the field of composite membrane materials, and in particular to a cooling composite membrane material composition, a cooling composite membrane material, and a preparation method and application thereof. Background Art

[0002] Traditional cigarettes mostly produce nicotine through direct combustion of the cigarette, but this traditional method inevitably produces some harmful substances due to the combustion reaction. In recent years, in order to reduce the unnecessary harmful substances in cigarettes, researchers have developed a new method to obtain nicotine: heating tobacco without burning it. This method heats special tobacco that can only be heated but not burned, and produces smoke through the volatilization of gases at a specific temperature.

[0003] However, because existing filters are not strong enough to withstand the excessively high temperatures generated by heating, smokers will inevitably experience discomfort when using new cigarettes. If this heat is not blocked and cooled, it can easily cause the surface temperature of the product to be too high, affecting the consumer experience and even posing a risk of burns.

[0004] Some researchers use eicosane / expanded graphite as functional fillers and cellulose acetate as a filter carrier, and reduce the smoke temperature by continuously circulating eicosane in the filter; some researchers reduce the smoke temperature by setting a reflux section in the gap between the tobacco section and the filter section; some researchers reduce the smoke temperature by adding cooling elements at the filter end.

[0005] Although certain results have been achieved in controlling the flue gas temperature, there are still shortcomings such as limited raw material sources, difficult degradation of materials, and unsatisfactory cooling effects. Therefore, it is still necessary to expand and develop new materials to solve this problem. Summary of the Invention

[0006] The purpose of the present invention is to overcome the defects of the prior art such as limited sources of cooling materials, high costs and limited cooling effects.

[0007] In order to achieve the above-mentioned object, the first aspect of the present invention provides a cooling composite membrane material composition, wherein the composite membrane material composition contains the following components stored separately or in combination: water, a biomass phase change material, glycerol, a modifier, a humidifier, and a heat-insulating component;

[0008] Relative to 100 parts by weight of water, the content of the biomass phase change material is 1 to 5 parts by weight, the content of the glycerol is 0.5 to 3 parts by weight, the content of the modifier is 2 to 10 parts by weight, the content of the humidifier is 0.3 to 2 parts by weight, and the content of the thermal insulation component is 0.1 to 1 part by weight;

[0009] The biomass phase change material is selected from at least one of konjac glucomannan, gelatin, carrageenan, pectin and chitosan;

[0010] The heat-insulating component is selected from at least one of SiO2 aerogel powder, neutral silica sol and water glass.

[0011] A second aspect of the present invention provides a method for preparing a cooling composite membrane material, the method comprising the following steps:

[0012] (1) first mixing water, a biomass phase change material, and glycerol to obtain a mixed solution I, wherein the biomass phase change material is selected from at least one of konjac glucomannan, gelatin, carrageenan, pectin, and chitosan;

[0013] (2) performing a second mixing of the mixed solution I with a modifier and a wetting agent to obtain a mixed solution II;

[0014] (3) performing a third mixing and self-crosslinking of the mixed solution II with a heat-insulating component to obtain a mixed solution III, wherein the heat-insulating component is selected from at least one of SiO2 aerogel powder, neutral silica sol, and water glass;

[0015] (4) contacting the mixed solution III with a substrate, and drying the product obtained after the contact to obtain a composite film I;

[0016] (5) contacting the composite membrane I with water to form a crystalline hydrated salt, and performing pleating and / or curling to obtain the cooling composite membrane material;

[0017] Among them, relative to 100 parts by weight of water, the amount of the biomass phase change material is 1 to 5 parts by weight, the amount of the glycerol is 0.5 to 3 parts by weight, the amount of the modifier is 2 to 10 parts by weight, the amount of the humidifier is 0.3 to 2 parts by weight, and the amount of the thermal insulation component is 0.1 to 1 part by weight.

[0018] The third aspect of the present invention provides a cooling composite membrane material prepared by the method described in the second aspect.

[0019] The fourth aspect of the present invention provides use of the cooling composite film material described in the third aspect in cigarettes.

[0020] Compared with existing cooling composite membrane materials, the cooling composite membrane material and its preparation method provided by the present invention have at least the following advantages:

[0021] (1) The cooling composite membrane material provided by the present invention contains SiO2 aerogel powder and crystalline hydrated salt, etc., which can effectively reduce the smoke temperature during the smoking process, making it difficult for heat to be quickly transferred to the smoking end, thereby preventing burns to the smoker, and can release moisture to improve the smoking comfort;

[0022] (2) The raw materials of the cooling composite membrane material provided by the present invention include plant polysaccharides, glycerol, inorganic salts and porous silicon oxide materials, all of which are non-toxic and harmless substances, safe and environmentally friendly;

[0023] (3) The raw materials of the cooling composite membrane material provided by the present invention are widely available, inexpensive, and have a simple preparation process;

[0024] (4) The cooling effect of the cooling composite membrane material provided by the present invention is obvious, and the cooling range of the 8mm long cooling section is 20°C or above.

[0025] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of temperature measurement points for testing the cooling performance of the cooling composite membrane material provided by the present invention;

[0027] Figure 2 This is a graph showing the change in cooling effect over time of the sample obtained in Example 1 of the present invention;

[0028] Figure 3 This is a graph showing the change in cooling effect over time of the sample obtained in Example 2 of the present invention;

[0029] Figure 4 This is a graph showing how the cooling effect of the sample obtained in Example 3 of the present invention changes over time. DETAILED DESCRIPTION

[0030] The endpoints of the ranges and any values disclosed herein are not limited to the precise ranges or values, and these ranges or values should be understood to include values close to these ranges or values. For numerical ranges, the endpoints of each range, the endpoints of each range and individual point values, and the individual point values can be combined with each other to obtain one or more new numerical ranges, which should be considered to be specifically disclosed herein.

[0031] It should be noted that, in various aspects of the present invention, for the same components in various aspects, the present invention is only described once in one aspect without repeated description, which should not be understood by those skilled in the art as a limitation of the present invention.

[0032] Unless otherwise stated, the room temperature in the present invention is 25±2°C.

[0033] As mentioned above, the first aspect of the present invention provides a cooling composite membrane material composition, which contains the following components stored independently or in combination: water, a biomass phase change material, glycerol, a modifier, a humidifier, and a heat-insulating component;

[0034] Relative to 100 parts by weight of water, the content of the biomass phase change material is 1 to 5 parts by weight, the content of the glycerol is 0.5 to 3 parts by weight, the content of the modifier is 2 to 10 parts by weight, the content of the humidifier is 0.3 to 2 parts by weight, and the content of the thermal insulation component is 0.1 to 1 part by weight;

[0035] The biomass phase change material is selected from at least one of konjac glucomannan, gelatin, carrageenan, pectin and chitosan;

[0036] The heat-insulating component is selected from at least one of SiO2 aerogel powder, neutral silica sol and water glass.

[0037] Preferably, the modifier is methyltrimethoxysilane.

[0038] Preferably, the wetting agent is selected from at least one of magnesium chloride hexahydrate, anhydrous calcium chloride and anhydrous magnesium chloride.

[0039] As mentioned above, the second aspect of the present invention provides a method for preparing a cooling composite membrane material, the method comprising the following steps:

[0040] (1) first mixing water, a biomass phase change material, and glycerol to obtain a mixed solution I, wherein the biomass phase change material is selected from at least one of konjac glucomannan, gelatin, carrageenan, pectin, and chitosan;

[0041] (2) performing a second mixing of the mixed solution I with a modifier and a wetting agent to obtain a mixed solution II;

[0042] (3) performing a third mixing and self-crosslinking of the mixed solution II with a heat-insulating component to obtain a mixed solution III, wherein the heat-insulating component is selected from at least one of SiO2 aerogel powder, neutral silica sol, and water glass;

[0043] (4) contacting the mixed solution III with a substrate, and drying the product obtained after the contact to obtain a composite film I;

[0044] (5) contacting the composite membrane I with water to form a crystalline hydrated salt, and performing pleating and / or curling to obtain the cooling composite membrane material;

[0045] Among them, relative to 100 parts by weight of water, the amount of the biomass phase change material is 1 to 5 parts by weight, the amount of the glycerol is 0.5 to 3 parts by weight, the amount of the modifier is 2 to 10 parts by weight, the amount of the humidifier is 0.3 to 2 parts by weight, and the amount of the thermal insulation component is 0.1 to 1 part by weight.

[0046] Preferably, in step (1), the first mixing is performed in the presence of ethanol.

[0047] In a preferred embodiment, in step (1), the water and the biomass phase change material are mixed to prepare a biomass phase change material solution for use in the first mixing.

[0048] In a preferred embodiment, in step (1), the glycerol is prepared into a glycerol-ethanol solution for use in the first mixing. More preferably, the mass fraction of the glycerol-ethanol solution is 1-5%, and the mass fraction of the ethanol used to prepare the solution is 80-100%.

[0049] Preferably, in step (1), the first mixing conditions at least meet the following requirements: stirring time of 0.5 to 2 h, stirring speed of 1000 to 1500 r / min, and temperature of 60 to 90°C.

[0050] In a more preferred case, in step (1), the biomass phase change material is konjac glucomannan or gelatin. The inventors have found that when the above biomass phase change material is used, the cooling composite membrane material prepared has a better cooling effect.

[0051] Preferably, in step (2), the modifier is methyltrimethoxysilane.

[0052] Preferably, in step (2), the wetting agent is selected from at least one of magnesium chloride hexahydrate, anhydrous calcium chloride and anhydrous magnesium chloride.

[0053] Preferably, in step (2), the second mixing conditions at least meet the following requirements: stirring time of 0.5 to 1 h, stirring speed of 500 to 1000 r / min, and temperature of 60 to 90°C.

[0054] Preferably, in step (3), the third mixing conditions at least meet the following requirements: stirring time of 0.5 to 2 h, stirring speed of 500 to 1000 r / min, and temperature of 60 to 90°C.

[0055] More preferably, in step (3), the thermal insulation component is SiO2 aerogel powder having a porosity of 92% and a particle size of 60-100 mesh. The inventors have found that the cooling composite membrane material prepared using the above-mentioned SiO2 aerogel powder has better thermal insulation and cooling effects.

[0056] Preferably, in step (4), the substrate is selected from at least one of high-permeability paper, meltblown cloth and non-woven fabric.

[0057] Preferably, in step (4), the thickness of the self-crosslinked mixed solution III placed on the substrate is 3 to 15 mm.

[0058] Preferably, in step (4), the drying conditions at least meet the following requirements: drying time of 4 to 8 hours, and drying temperature of 50 to 70° C. The drying operation can be performed in a forced air oven.

[0059] In a more preferred embodiment, in step (4), the drying conditions are controlled so that the composite membrane I obtained after drying contains 3 to 10 wt% water. The inventors have found that under the above conditions, the cooling composite membrane material prepared can have better heat insulation and cooling effects.

[0060] Preferably, in step (5), the contact with water conditions at least meet the following conditions: temperature of 23-27° C., time of 1-5 min.

[0061] In a more preferred case, in step (5), the operation of contacting with water is carried out by introducing water vapor, and the conditions of contacting with water are controlled so that the obtained cooling composite membrane material can effectively release moisture during use, increase the wettability of the smoke, and improve the comfort of smoking.

[0062] As mentioned above, the third aspect of the present invention provides a cooling composite membrane material prepared by the method described in the second aspect.

[0063] As mentioned above, the fourth aspect of the present invention provides the use of the cooling composite film material described in the third aspect in cigarettes.

[0064] Preferably, the cooling composite film material is used in heat-not-burn electronic cigarettes.

[0065] The present invention will be described in detail below through examples.

[0066] In the following examples, unless otherwise specified, the experimental instruments and raw materials involved are commercially available.

[0067] Experimental instruments

[0068] Laboratory multifunctional stirrer: Model BJB-300, Bojin Chemical Machinery Co., Ltd.

[0069] Constant temperature water bath: Model HH-2, Xinrui Instrument Factory, Xicheng District, Jintan District;

[0070] Blast oven: Model 101-1B, Shaoxing Yicheng Instrument Manufacturing Co., Ltd.

[0071] Differential Scanning Calorimeter: Model DSC214, NETZSCH, Germany.

[0072] raw material

[0073] Konjac glucomannan: Johnson Konjac, Hubei Johnson Konjac Technology Co., Ltd.;

[0074] Gelatin: analytical grade gelatin, Tianjin Kemiou Chemical Reagent Co., Ltd.

[0075] Carrageenan: Lvxin (Fujian) Food Co., Ltd.

[0076] Pectin: Andre Pectin, Yantai Andre Pectin Co., Ltd.

[0077] Aerogel powder: SiO2 aerogel powder (porosity 92%, particle size 60-100 mesh), IBIH New Materials Co., Ltd.

[0078] Water glass: sodium silicate (Na2SiO3·9H2O), Tianjin Tianli Chemical Reagent Co., Ltd.

[0079] Neutral silica sol: ZS-30, Zhejiang Yuda Chemical Co., Ltd.

[0080] Glycerol: propylene glycol, Shanghai Hushi Chemical Co., Ltd.;

[0081] Ethanol: anhydrous ethanol, Tianjin Tianli Chemical Reagent Co., Ltd.;

[0082] Magnesium chloride hexahydrate: Shanghai Hushi Chemical Co., Ltd.

[0083] Anhydrous calcium chloride: Shanghai Hushi Chemical Co., Ltd.;

[0084] Methyltrimethoxysilane: MTMS, Nanjing Chuangshi Chemical Additives Co., Ltd.;

[0085] High transparency paper: 25g / 6000CU, Mudanjiang Hengfeng Paper Co., Ltd.

[0086] Example 1

[0087] The cooling composite membrane material S1 is prepared according to the following preparation method, which includes the following steps:

[0088] (1) preparing a 3% (w / w) glycerol-ethanol solution, wherein the ethanol is 80% (w / w) ethanol; preparing a konjac glucomannan (KGM) solution by adding water and konjac glucomannan; adding the glycerol-ethanol solution to the uniformly mixed KGM solution, and stirring at 80° C. for 1 h at a stirring speed of 1000 r / min until the mixture is uniformly mixed, to obtain a mixed solution I;

[0089] (2) adding MTMS to the mixed solution I, stirring at 80° C. for 15 min at a stirring speed of 1000 r / min; then adding magnesium chloride hexahydrate, stirring at 80° C. for 0.5 h at a stirring speed of 500 r / min, to obtain a mixed solution II;

[0090] (3) adding SiO2 aerogel powder to the mixed solution II, stirring at 80°C for 0.5h at a stirring speed of 500r / min, and performing self-crosslinking to obtain a mixed solution III;

[0091] (4) pouring the mixed solution III into a mold covered with high-transparency paper to a thickness of 5 mm, and then placing it in a blast oven at 50° C. to dry for 4 h. During the drying process, the mixed solution III will further cross-link to obtain a composite film I;

[0092] (5) placing the composite film I in an environment with water vapor (room temperature, ambient humidity of 80%) for 3 minutes to form a crystalline hydrated salt, and then rolling it to obtain a cooling composite film material S1;

[0093] The dosage of each component is as follows: water is 100g, konjac glucomannan is 1g, glycerol ethanol solution is 20g, MTMS is 2g, magnesium chloride hexahydrate is 1g, SiO2 aerogel powder is 0.2g, and the area of high-transmittance paper is 30×30cm.

[0094] The test methods and conditions are as follows:

[0095] (1) Cooling performance test:

[0096] Insert the thermocouple wire into different positions of the homemade cigarette to conduct real-time temperature testing. The temperature measurement positions are as follows: Figure 1 shown.

[0097] Specifically, the cooling composite membrane material S1 was cut into rectangular materials with a length of 8 mm and a width of 120 mm, and then rolled into a cylindrical cooling section with a diameter of 7 mm and a length of 8 mm. The prepared cooling section was encapsulated in a homemade "small cigarette" (total length 45 mm, with a hollow tube length of 20 mm). During the test, the recycled tobacco was ignited with a lighter. After the smoke stabilized for 10 seconds, the three temperature measuring points were measured with a galvanic wire, and the temperature was measured every 5 seconds, and the temperature was recorded.

[0098] (2) Thermal performance test (differential scanning calorimetry, DSC)

[0099] The phase transition temperature and phase transition enthalpy of cooling composite membrane materials are fundamental factors affecting their cooling performance, so DSC testing is performed on them. A pair of empty crucibles are placed in the furnace chamber, and a baseline test is performed using the "correction" mode (heating range: 25-400°C, heating rate: 10°C / min). A composite membrane sample is placed in the sample crucible, and the "sample + correction" mode is used to perform the test based on the baseline.

[0100] The results are analyzed as follows:

[0101] Figure 2 The cooling effect of the sample obtained in this embodiment changes with time. Figure 2 It can be seen that the cooling effect of the cooling composite membrane material S1 is obvious and relatively stable, with a cooling range of 22.2±0.89℃.

[0102] Example 2

[0103] The cooling composite membrane material S2 is prepared according to the following preparation method, which includes the following steps:

[0104] (1) preparing a 3% (w / w) glycerol-ethanol solution, wherein the ethanol is 80% (w / w) ethanol; preparing a gelatin solution by mixing water and gelatin; adding the glycerol-ethanol solution to the uniformly mixed gelatin solution, stirring at 80° C. for 0.5 h at a stirring speed of 1000 r / min until the mixture is uniformly mixed, to obtain a mixed solution I;

[0105] (2) adding MTMS to the mixed solution I, stirring at 80°C for 15 min at a stirring speed of 1000 r / min; then adding anhydrous calcium chloride, stirring at 80°C for 0.5 h at a stirring speed of 500 r / min, to obtain a mixed solution II;

[0106] (3) adding SiO2 aerogel powder to the mixed solution II, stirring at 80°C for 0.5h at a stirring speed of 500r / min, and performing self-crosslinking to obtain a mixed solution III;

[0107] (4) pouring the mixed solution III into a mold covered with high-transparency paper to a thickness of 5 mm, and then placing it in a blast oven at 50° C. to dry for 4 h. During the drying process, the mixed solution III will further cross-link to obtain a composite film I;

[0108] (5) placing the composite film I in an environment with water vapor (room temperature, ambient humidity of 80%) for 3 minutes to form a crystalline hydrated salt, and then rolling it to obtain a cooling composite film material S2;

[0109] The amounts of the components are as follows: 100 g of water, 1 g of gelatin, 20 g of glycerol ethanol solution, 2 g of MTMS, 1 g of anhydrous calcium chloride, 0.2 g of SiO2 aerogel powder, and an area of high-transmittance paper of 30×30 cm.

[0110] The test method and conditions are the same as those in Example 1.

[0111] The results are analyzed as follows:

[0112] Figure 3 The cooling effect of the sample obtained in this embodiment changes with time. Figure 3It can be seen that the cooling effect of the cooling composite membrane material S2 is obvious and relatively stable, with a cooling range of 21±1.38℃.

[0113] Example 3

[0114] The cooling composite membrane material S3 is prepared according to the following preparation method, which includes the following steps:

[0115] (1) preparing a 4% (w / w) glycerol ethanol solution, wherein the ethanol is 85% (w / w) ethanol; preparing a carrageenan / pectin mixed solution (the mass ratio of carrageenan to pectin is 1:1) by adding water, carrageenan, and pectin; adding the glycerol ethanol solution to the uniformly mixed carrageenan / pectin mixed solution, stirring at 90° C. for 0.5 h at a stirring speed of 1000 r / min until the mixture is uniformly mixed, to obtain a mixed solution I;

[0116] (2) adding MTMS to the mixed solution I, stirring at 80°C for 15 min at a stirring speed of 1000 r / min; then adding anhydrous calcium chloride, stirring at 80°C for 0.5 h at a stirring speed of 500 r / min, to obtain a mixed solution II;

[0117] (3) adding water glass to the mixed solution II, adjusting the pH value with hydrochloric acid until a small amount of gel appears, stirring at 80° C. for 2 h at a stirring speed of 500 r / min to break up the gel and mix evenly, and self-crosslinking to obtain a mixed solution III;

[0118] (4) pouring the mixed solution III into a mold covered with high-transparency paper to a thickness of 5 mm, and then placing it in a blast oven at 50° C. to dry for 5 h. During the drying process, the mixed solution III will further cross-link to obtain a composite film I;

[0119] (5) placing the composite film I in an environment with water vapor (room temperature, ambient humidity of 80%) for 3 minutes to form a crystalline hydrated salt, and then rolling it to obtain a cooling composite film material S3;

[0120] The dosage of each component is as follows: 100 g of water, 0.5 g of carrageenan, 0.5 g of pectin, 20 g of glycerol ethanol solution, 2 g of MTMS, 1 g of anhydrous calcium chloride, 1 g of water glass, and the area of the high-transparency paper is 30×30 cm.

[0121] The test method and conditions are the same as those in Example 1.

[0122] The results are analyzed as follows:

[0123] Figure 4 The cooling effect of the sample obtained in this embodiment changes with time. Figure 4It can be seen that the cooling effect of the cooling composite membrane material S3 is obvious and relatively stable, with a cooling range of 21.78±1.6℃.

[0124] The DSC test results show that the phase transition temperature of the cooling composite membrane materials S1-S3 is 50-88°C, and the phase change enthalpy value is 173-221.4 J / g.

[0125] From the above results, it can be seen that the cooling composite membrane material provided by the present invention has an obvious cooling effect, and the raw materials are safe and environmentally friendly, with a wide source and a simple preparation process.

[0126] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, various simple variations of the technical solution of the present invention may be made, including combining the various technical features in any other appropriate manner. These simple variations and combinations should also be regarded as disclosed in the present invention and fall within the scope of protection of the present invention.

Claims

1. A cooling composite membrane material composition, characterized in that: The composite membrane material composition contains the following components which are stored independently or in combination: water, biomass phase change material, glycerol, modifier, humidifier and heat insulation component; Relative to 100 parts by weight of water, the content of the biomass phase change material is 1 to 5 parts by weight, the content of the glycerol is 0.5 to 3 parts by weight, the content of the modifier is 2 to 10 parts by weight, the content of the humidifier is 0.3 to 2 parts by weight, and the content of the thermal insulation component is 0.1 to 1 part by weight; The biomass phase change material is selected from at least one of konjac glucomannan, gelatin, carrageenan, pectin and chitosan; The heat-insulating component is selected from at least one of SiO2 aerogel powder, neutral silica sol and water glass; The modifier is methyltrimethoxysilane; The humidifying agent is selected from at least one of magnesium chloride hexahydrate, anhydrous calcium chloride and anhydrous magnesium chloride.

2. A method for preparing a cooling composite membrane material, characterized in that: The method comprises the following steps: (1) first mixing water, a biomass phase change material and glycerol to obtain a mixed solution I, wherein the biomass phase change material is selected from at least one of konjac glucomannan, gelatin, carrageenan, pectin and chitosan; (2) performing a second mixing of the mixed solution I with a modifier and a wetting agent to obtain a mixed solution II; the modifier is methyltrimethoxysilane; and the wetting agent is at least one selected from magnesium chloride hexahydrate, anhydrous calcium chloride, and anhydrous magnesium chloride; (3) performing a third mixing and self-crosslinking of the mixed solution II with a heat-insulating component to obtain a mixed solution III, wherein the heat-insulating component is selected from at least one of SiO2 aerogel powder, neutral silica sol, and water glass; (4) contacting the mixed solution III with a substrate, and drying the product obtained after the contact to obtain a composite membrane I; (5) contacting the composite membrane I with water to form a crystalline hydrated salt, and performing pleating and / or curling to obtain the cooling composite membrane material; Among them, relative to 100 parts by weight of water, the amount of the biomass phase change material is 1 to 5 parts by weight, the amount of the glycerol is 0.5 to 3 parts by weight, the amount of the modifier is 2 to 10 parts by weight, the amount of the humidifier is 0.3 to 2 parts by weight, and the amount of the thermal insulation component is 0.1 to 1 part by weight.

3. The method according to claim 2, wherein: In step (1), the first mixing is performed in the presence of ethanol.

4. The method according to claim 2 or 3, wherein: In step (1), the first mixing conditions at least meet the following requirements: stirring time of 0.5 to 2 h, stirring speed of 1000 to 1500 r / min, and temperature of 60 to 90 °C.

5. The method according to claim 2 or 3, wherein: In step (2), the second mixing conditions at least meet the following requirements: stirring time of 0.5 to 1 h, stirring speed of 500 to 1000 r / min, and temperature of 60 to 90 °C.

6. The method according to claim 2 or 3, wherein: In step (3), the third mixing conditions at least meet the following requirements: stirring time of 0.5-2 h, stirring speed of 500-1000 r / min, and temperature of 60-90 °C.

7. The method according to claim 2 or 3, wherein: In step (4), the substrate is selected from at least one of high-permeability paper, meltblown cloth and non-woven fabric.

8. The method according to claim 2 or 3, wherein: In step (4), the drying conditions at least meet the following requirements: drying time is 4 to 8 hours, and drying temperature is 50 to 70°C.

9. The method according to claim 2 or 3, wherein: In step (5), the conditions for contact with water at least meet the following requirements: temperature of 23-27°C and time of 1-5 min.

10. A cooling composite membrane material prepared by the method according to any one of claims 2 to 9.

11. Use of the cooling composite film material according to claim 10 in cigarettes.

12. The use according to claim 11, characterized in that Application of the cooling composite film material in heat-not-burn electronic cigarettes.

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