Core-shell structure phase change material and preparation method thereof

A phase change material, core-shell structure technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of limited application function, easy leakage, packaging difficulties, etc., to protect the ecological environment, prevent leakage, improve The effect of thermal conductivity

Inactive Publication Date: 2019-11-05
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the thermal conductivity of phase change matrix materials and support materials used in finalized phase change materials is usually relatively low. Most phase change matrix materials use solid-liquid phase change materials, and phase change materials have certain fluidity when they are in a liquid state. It is prone to leakage and difficult to package, which greatly limits its practical application function

Method used

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  • Core-shell structure phase change material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of core-shell structure phase change material, its preparation method comprises the following steps:

[0028] S1. Weigh 50g of high-density polyethylene HDPE, 50g of solid paraffin, 2.5g of carbon nanotubes and 2.5g of antioxidant 1010; wherein, paraffin is a phase change material with a phase change temperature of 52.6°C and a latent heat of phase change of 210J / g. Paraffin is used as the core material; HDPE is used as the basic support material, carbon nanotubes are used as thermal conductivity enhancers, and HDPE, carbon nanotubes and antioxidant 1010 are used as shell materials;

[0029] S2. Put high-density polyethylene (HDPE) and antioxidant 1010 in a silicone oil bath, and heat at a constant temperature of 160°C for about 30 minutes until it completely melts; add carbon nanotubes, maintain the temperature at 160°C, and stir magnetically The rotating speed of the device is set at 30r / min, and heating is performed for about 30min while stirring, so that the ...

Embodiment 2

[0036] A core-shell structure phase change material, the difference between its preparation method and the preparation method of the core-shell structure phase change material in Example 1 is that the coaxial spinning device used in this example adopts 19G / 15G combined coaxial spinning Silk needle, that is, the inner needle of the coaxial spinning device (i.e. the core layer liquid channel) is a 19G needle with an inner diameter of 0.70mm and an outer diameter of 1.07mm; the outer needle (i.e. the shell liquid channel) is a 15G needle with an inner diameter of It is 1.37mm, and the outer diameter is 1.8mm; Other operations are the same as the preparation method in Example 1. It is measured that the thermal conductivity of the core-shell structure phase change material prepared in this embodiment is 3.343W / (m·K), and the latent heat of phase change is 80.5J / g.

Embodiment 3

[0038] A core-shell structure phase change material, the difference between its preparation method and the preparation method of the core-shell structure phase change material in Example 1 is that the coaxial spinning device used in this example adopts 22G / 17G combined coaxial spinning Silk needle, that is, the inner needle of the coaxial spinning device (i.e. the core layer liquid channel) is a 22G needle with an inner diameter of 0.41mm and an outer diameter of 0.72mm; the outer needle (i.e. the shell liquid channel) is a 17G needle with an inner diameter of 1.01mm, outer diameter 1.49mm; Other operations are the same as the preparation method in Example 1. It is measured that the thermal conductivity of the core-shell structure phase change material prepared in this embodiment is 3.859W / (m·K), and the latent heat of phase change is 61.6J / g.

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Abstract

The invention discloses a core-shell structure phase change material and a preparation method thereof. The core-shell structure phase change material comprises a core layer and a shell layer coating the outside of the core layer, wherein the shell layer comprises a base supporting material and a heat conduction enhancer, and the base supporting material is a high density polyethylene or an addition type liquid silicone rubber; and the core layer comprises a phase change material and the heat conduction enhancer, and the use amount of the heat conduction enhancer in the material of the core layer is 0-95% of the use amount of the phase change material in the core layer. The high density polyethylene or the addition type liquid silicone rubber is used as the base supporting material, and forms the shell layer together with the heat conduction enhance, so the heat conduction property of the core-shell structure phase change material is significantly improved; and a core part is coated with the core layer through the shell layer, so the problem of leakage of the phase change material after liquefaction at a temperature above a phase transformation point is effectively prevented.

Description

technical field [0001] The invention relates to the technical field of phase change materials, in particular to a phase change material with a core-shell structure and a preparation method thereof. Background technique [0002] With the rapid development of the electronic technology industry, electrical appliances are becoming more and more miniaturized and integrated. The working environment of electrical appliances is also facing the test of high power and high heat flux. If the electrical appliances do not have good cooling conditions, it will inevitably affect the normal operation of electronic devices. The work has a great impact on both the performance of the electronic device and the safety of the user itself. Therefore, this puts forward requirements for the thermal control of the electronic device. [0003] The main purpose of thermal control is to maintain the temperature of the working environment of the electronic device within the normal working temperature rang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 祝渊蒋文龙孙琪唐正阳陈安琪
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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