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Composite phase change material for heating non-burning tobacco heat source and preparation method thereof

A composite phase-change material and heat-not-burn technology, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problem of heat-not-burn tobacco heat sources that cannot be used, and phase change temperatures that cannot meet heat-not-burn tobacco heat sources, etc. problem, to achieve the effect of increasing thermal conductivity, reducing preheating time, and simple preparation process

Active Publication Date: 2021-05-28
INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the commonly used composite phase change materials use metal foam as the skeleton, and the metal foam is filled with phase change materials for heat transmission. However, the phase change temperature of the existing composite phase change materials cannot meet the needs of heat-not-burn tobacco heat sources. It cannot be used directly as a heat source for heat-not-burn tobacco

Method used

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  • Composite phase change material for heating non-burning tobacco heat source and preparation method thereof
  • Composite phase change material for heating non-burning tobacco heat source and preparation method thereof
  • Composite phase change material for heating non-burning tobacco heat source and preparation method thereof

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preparation example Construction

[0027] The present invention proposes a method for preparing a composite phase-change material used as a heat-not-burn tobacco heat source, the preparation method comprising the following steps:

[0028] Fill the metal foam with inorganic salt as phase change material to obtain composite phase change material matrix. The phase change temperature of inorganic salt is 200°C-450°C;

[0029] A protective layer is coated on the surface of the matrix of the composite phase-change material to obtain the composite phase-change material used for heating non-burning tobacco heat sources.

[0030] Here, inorganic salt is a high-temperature phase change material. When changing from liquid to solid state, the temperature of the material itself remains almost unchanged before the phase change is completed, forming a wide temperature platform and releasing a large amount of latent heat at the same time. And the phase transition temperature of the selected inorganic salt is 200°C-450°C, which...

Embodiment 1

[0048] First, put the mixed inorganic salts of sodium carbonate, lithium carbonate, and potassium carbonate with a mass ratio of 1:1:1 into a pulverizer, and pulverize at a speed of 15000r / min for 30s to obtain a uniformly mixed ternary carbonate. Then, under vacuum conditions, the ternary carbonate is heated to a molten state, so that the molten ternary carbonate is impregnated into the pores of the foamed copper to obtain a composite phase change material matrix, where the ternary carbonate is filled The efficiency is 85%. Finally, a metal copper foil layer is coated on the surface of the matrix of the composite phase change material to obtain the composite phase change material, and the phase change temperature of the composite phase change material is 380°C.

Embodiment 2

[0050] First, the mixed inorganic salt of sodium nitrate and potassium nitrate with a mass ratio of 3:1 was put into a pulverizer, and pulverized at a speed of 15000r / min for 30s to obtain a uniformly mixed binary nitrate. Then, under vacuum conditions, the binary nitrate is heated to a molten state, so that the molten binary nitrate is impregnated into the pores of the foamed copper to obtain a composite phase change material matrix, where the filling efficiency of the ternary carbonate is 86%. Finally, a metal copper foil layer is coated on the surface of the matrix of the composite phase change material to obtain the composite phase change material, and the phase change temperature of the composite phase change material is 220°C.

[0051] The embodiment is prepared to obtain a composite phase change material partition, and its cross-sectional view is taken, such as figure 1 shown by figure 1 It can be seen that the ternary carbonate is evenly distributed in the voids of t...

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Abstract

The invention discloses a composite phase-change material used for heating non-burning tobacco heat sources and a preparation method thereof. Wherein, the preparation method of the composite phase change material used for heat-not-burning tobacco heat source comprises the following steps: filling the metal foam with inorganic salt as the phase change material to obtain the matrix of the composite phase change material, and the phase change material of the inorganic salt The change temperature is 200°C-450°C, and the latent heat of phase change is greater than 150 J / g; the surface of the composite phase change material substrate is coated with a protective layer to obtain a composite phase change material for heating non-burning tobacco heat sources. The technical solution of the invention can make the phase change temperature of the composite phase change material meet the requirement of the heat-not-burn tobacco heat source, and can be directly used as the heat-not-burn tobacco heat source.

Description

technical field [0001] The invention relates to the technical field of heat-not-burn tobacco heat sources, in particular to a composite phase-change material for heat-not-burn tobacco heat sources and a preparation method thereof. Background technique [0002] The heat-not-burn tobacco heat source is a kind of heat-not-burn tobacco heat source that can heat the pod enough to emit a tobacco-flavored aerosol without igniting the pod. The heating time is short, the thermal conductivity is strong, the effective heat storage is high, the suitable heating temperature is 200-450 ℃, and the continuous heat release time needs to exceed 300s. [0003] Phase change materials refer to substances that can provide latent heat by changing the state of matter under the condition of constant temperature. Phase change energy storage refers to the energy absorbed or released by phase change materials during the phase change process. Compared with other energy storage methods (such as Sensible...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06C09K5/18
CPCC09K5/063C09K5/18
Inventor 张和平陶能龚伦伦张劲周顺
Owner INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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