Microcapsule phase change material and preparation method thereof

A technology of phase change materials and microcapsules, which is applied in the field of materials science, can solve problems such as poor thermal conductivity, poor particle stability, and unfavorable energy, and achieve the effects of improving thermal conductivity, low supercooling, and improving physical stability

Inactive Publication Date: 2017-05-31
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0023] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a microcapsule phase change material and a preparation method thereof, the microcapsule phase change material and the preparation method thereof shall solve the problem of microcapsule phase change in the prior art. The technical problems of variable material particles are poor stability, poor thermal conductivity, and energy is not conducive to storage

Method used

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  • Microcapsule phase change material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0048]1) A step of weighing the core material and the wall material, weighing 40g of the core material n-octadecane and 20g of the wall material according to the core-wall mass ratio of 2:1; the wall material consists of 10g of the first wall material gelatin and the second wall material Material gum arabic 10g; Add water to dissolve in the second wall material for subsequent use;

[0049] 2) A step to determine the composite amount of nanoparticles. The total composite amount of aluminum nanoparticles and graphite nanoparticles accounts for 3% of the total mass of the core wall, that is, 1.8g;

[0050] 3) A step of preparing a mixture of aluminum nanoparticles and graphite nanoparticles, the mass ratio of aluminum nanoparticles and graphite nanoparticles is 1:1, taking 0.9g of aluminum nanoparticles and 0.9g of graphite nanoparticles to obtain a mixture of aluminum nanoparticles and graphite nanoparticles;

[0051] 4) A step of preparing a core material composite solution, ta...

Embodiment 2

[0056] 1) A step of weighing the core material and the wall material, weighing 60g of the core material paraffin and 20g of the wall material according to the mass ratio of the core to the wall of 3:1; the wall material consists of 10g of the first wall material gelatin and the second wall material gum arabic 10g; add water to dissolve in the second wall material for later use;

[0057] 2) A step to determine the composite amount of nanoparticles. The total composite amount of aluminum nanoparticles and graphite nanoparticles accounts for 5% of the total mass of the core wall, that is, 4g;

[0058] 3) A step of preparing a mixture of aluminum nanoparticles and graphite nanoparticles, the mass ratio of aluminum nanoparticles and graphite nanoparticles is 1:3, taking 1g of aluminum nanoparticles and 3g of graphite nanoparticles to obtain a mixture of aluminum nanoparticles and graphite nanoparticles;

[0059] 4) A step of preparing a core material composite solution, mixing the ...

Embodiment 3

[0064] 1) A step of weighing the core material and the wall material, weighing 50 g of the core material n-hexadecane and 10 g of the wall material according to the core-wall mass ratio of 5:1; the wall material consists of 5 g of the first wall material gelatin and 5 g of the second wall material Material gum arabic 5g; Add water to dissolve in the second wall material for subsequent use;

[0065] 2) A step to determine the composite amount of nanoparticles. The total composite amount of aluminum nanoparticles and graphite nanoparticles accounts for 5% of the total mass of the core wall, that is, 3g;

[0066] 3) A step of preparing a mixture of aluminum nanoparticles and graphite nanoparticles, the mass ratio of aluminum nanoparticles and graphite nanoparticles is 2:1, taking 2g of aluminum nanoparticles and 1g of graphite nanoparticles to obtain a mixture of aluminum nanoparticles and graphite nanoparticles;

[0067] 4) A step of preparing a core material composite solution,...

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Abstract

The invention provides a microcapsule phase change material. The microcapsule phase change material comprises a core material, wherein a wall material is arranged on the outer side of the core material; aluminum nanoparticles and graphite nanoparticles are contained in both the core material and the wall material. The invention further provides a preparation method of the microcapsule phase change material. The preparation method comprises the following steps: weighing the core material and the wall material; preparing a mixture of the aluminum nanoparticles and the graphite nanoparticles; determining the composite content of the nanoparticles; preparing a composite solution of the core material; preparing a composite solution of a first wall material; moulding a microcapsule; washing and drying the microcapsule. According to the microcapsule phase change material provided by the invention, three characteristics are improved at the same time by adding the composite aluminum and graphite nanoparticles into the core material and the wall material, namely the particle density of the microcapsule phase change material is adjusted, the thermal conductivity is increased, and the overcooling degree is reduced; the microcapsule phase change material which contains the composite aluminum and graphite nanoparticles and has high density, high thermal conductivity and low overcooling degree is obtained.

Description

technical field [0001] The invention belongs to the field of materials science and relates to a phase change material, in particular to a microcapsule phase change material and a preparation method thereof. Background technique [0002] Microcapsule phase change material particles refer to novel material particles that encapsulate phase change materials in a dense and elastic polymer shell through microcapsule preparation technology. The particle size is usually in the range of 1 μm–1000 μm, which has been reported Smaller particle sizes are possible. The phase change microcapsule suspension is a suspension formed by dispersing the prepared microcapsule phase change material particles in a single-phase fluid (such as water, heat transfer oil, etc.). [0003] Research on microcapsule technology began in the 1930s and achieved significant results in the 1950s. Throughout the development process, research in the United States has always been in a leading position, and Japan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 仇中柱周宇飞李芃
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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