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A preparation method of a composite phase-change film material that can be used to heat the filter of a non-burning cigarette to reduce the temperature of the smoke

A heat-not-burn, composite phase change technology, applied in heat exchange materials, e-liquid filters, chemical instruments and methods, etc., can solve the problems of phase transition temperature and cooling effect limitation, wide range of suction resistance, and increase of suction resistance. , to achieve the effect of simple and convenient equipment and operation process, reducing flue gas temperature, and good cooling effect

Active Publication Date: 2021-02-26
HUBEI CHINA TOBACCO IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese invention patent CN108523216A discloses that by spraying the composite material of fragrance substance and polyvinyl alcohol on the polylactic acid tow of the filter tip, after solidification and molding, a polylactic acid tow filter rod that can reduce the temperature of the smoke is obtained; however, due to polyvinyl alcohol Such materials are only sprayed onto the surface of polylactic acid tow, and its cooling effect is limited to a certain extent, and the range of suction resistance provided by this patent is relatively wide.
Chinese invention patent CN109567271A discloses that by copolymerizing alkyl ketene dimer and polylactic acid and attaching the copolymer to an inorganic carrier as cooling particles, it is added to the filter rod section. Due to the uniformity of cooling material addition, the cooling effect is better , but the addition of inorganic carriers reduces the stability of phase change materials and has a greater impact on the draw resistance of cigarettes, which can easily affect the comfort of smoking
Chinese invention patent CN109363237A also discloses an inorganic cooling particle attached to a phase change material that can be added to the filter rod. Because it is only physically attached, its phase change temperature and cooling effect are still limited, and the addition of inorganic particles is easy to cause The increase of suction resistance affects the comfort of smoking

Method used

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  • A preparation method of a composite phase-change film material that can be used to heat the filter of a non-burning cigarette to reduce the temperature of the smoke
  • A preparation method of a composite phase-change film material that can be used to heat the filter of a non-burning cigarette to reduce the temperature of the smoke
  • A preparation method of a composite phase-change film material that can be used to heat the filter of a non-burning cigarette to reduce the temperature of the smoke

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Experimental program
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Effect test

Embodiment 1

[0021] A method for preparing a composite phase-change film material that can be used to heat the filter tip of a non-burning cigarette to reduce the temperature of smoke, comprising the following steps, the structure and preparation process of the material are as follows: figure 1 Shown:

[0022] (1) Preparation of composite phase change thin film material precursor: under the protection of inert gas, 20g polylactic acid (PLA, molecular weight 137000g / mol), 2g polyethylene glycol diacrylate (PEGDA, molecular weight 400g / mol) were fully mixed and dissolved in 100mL acetonitrile to obtain solution A; then 0.5g vinyl-modified polyhedral polysilsesquioxane (V-POSS) and 0.225g photoinitiator 2-hydroxy-2-methyl-1-phenyl Acetone (HMPF) solution was added to the above solution A, fully stirred evenly to obtain solution B.

[0023] (2) Preparation of composite phase change film material: Take 10mL of solution B obtained in step (1), pour it into a 5cm×5cm polytetrafluoroethylene petr...

Embodiment 2

[0026] The experimental procedure is the same as in Example 1, except that the amount of PEGDA used in step (1) is 20 g, the amount of V-POSS is 2.0 g, and the phase transition temperature of the prepared composite phase change thin film material is 43.2 °C (See Figure 4 ), the latent heat of phase change is 81.03J / g.

Embodiment 3

[0028] The experimental procedure is the same as that of Example 1, except that the casting drying temperature in step (2) is 75°C, the UV radiation crosslinking time is 30min, and the phase transition temperature of the prepared composite phase change film material is 35.7°C (See Figure 4 ), the latent heat of phase change is 76.25J / g.

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Abstract

The invention belongs to the technical field of cigarette production, and provides a composite phase-change film material that can be used for heating non-burning cigarette filters to reduce the temperature of smoke and a preparation method thereof. Polylactic acid is used as the main phase-change cooling material and polyethylene glycol is used as the material. The auxiliary material uses functionalized polyhedral polysilsesquioxane as a cross-linking agent to form a composite phase-change film material with a semi-interpenetrating network structure of nano-cage units under ultraviolet light irradiation conditions. The invention prepares a composite phase-change film material with a semi-interpenetrating network structure with nano-cage units through a simple photoinitiated polymerization cross-linking technology suitable for industrial production, which can be applied to the cooling filter rod section of heat-not-burn cigarettes , while effectively reducing the smoke temperature without affecting the draw resistance and smoking comfort.

Description

technical field [0001] The invention belongs to the technical field of cigarette production, and in particular relates to a preparation method of a composite phase-change film material which can be used to heat the filter tip of a non-burning cigarette to reduce the temperature of smoke. Background technique [0002] Heat-not-burn cigarettes use an external heating element at 200-400°C to crack the tobacco without burning it to produce smoke. This kind of tobacco products has a good development prospect because of its relatively small amount of harmful substances in smoke and the physiological feeling and smoking method close to traditional cigarettes. Therefore, multinational tobacco companies have invested a lot of money in research and development and innovation of this type of tobacco products, and quickly put them into the market; while domestic heat-not-burn technology has gradually matured. After 2012, the domestic tobacco industry has made significant breakthroughs i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06A24D3/17
CPCA24D3/00C09K5/06
Inventor 杨光远彭三文李哲铭曹祥薇侯宁
Owner HUBEI CHINA TOBACCO IND
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