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Preparation method of solid-liquid two-phase metal-polymer heat-conducting phase-change composite material

A technology of phase change composite materials and polymer materials, which is applied in the field of preparation of solid-liquid two-phase metal-polymer thermally conductive phase change composite materials, can solve the problem of poor mechanical properties of composite materials, loss of phase change ability, and influence on heat transfer efficiency. and other problems, to achieve the effects of high thermal conductivity, broadening the scope of application, and easy regulation of thermal conductivity

Inactive Publication Date: 2021-11-23
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, like traditional metals with only a single melting point, gallium loses its phase transition ability after its melting point (29.8°C), and cannot meet the heat dissipation requirements of common electronic products (35-100°C).
Among them, metal fillers are widely used due to low cost, simple processing technology, and good thermal conductivity. However, traditional metal fillers (Ag, Cu, Al, etc.) are generally pure solids, and there are obvious phase interfaces after blending with polymers. , which not only affects the efficiency of heat transfer, but also deteriorates the mechanical properties of the composite

Method used

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  • Preparation method of solid-liquid two-phase metal-polymer heat-conducting phase-change composite material
  • Preparation method of solid-liquid two-phase metal-polymer heat-conducting phase-change composite material
  • Preparation method of solid-liquid two-phase metal-polymer heat-conducting phase-change composite material

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preparation example Construction

[0033] A method for preparing a solid-liquid two-phase metal-polymer thermally conductive phase-change composite material, comprising the following steps:

[0034] (1) The following components are included in parts by weight: 10 to 90 parts of metals, 1 to 90 parts of polymer materials, and 0 to 50 parts of functional additives; the metals, polymer materials and functional additives are weighed and mixed according to the proportioning ratio, Get the mixed material;

[0035] (2) Heating the mixed material in the range of greater than 10°C and less than 300°C, so that the metal in the solid-liquid coexistence phase and the polymer material in the molten state are physically mixed to obtain a thermally conductive phase-change polymer composite material.

[0036] The physical mixing method is at least one of grinding dispersion, ultrasonic dispersion and mechanical stirring dispersion.

[0037] The ratio of the mass fraction of the solid phase to the liquid phase (solid phase rat...

Embodiment 1

[0062] The invention discloses a method for preparing a metal-polymer thermally conductive phase-change composite material, which comprises the following steps:

[0063] (1) According to the ratio in Table 1, weigh gallium element, zinc element, methyl silicone oil, anti-sedimentation agent BYK-410, and lauric acid;

[0064] (2) Mix gallium element and zinc element with methyl silicone oil, anti-settling agent BYK-410, and lauric acid;

[0065] (3) Stir the above mixture at 150° C. at a speed of 1500 r / min for 15 minutes by mechanical stirring method and mix well.

Embodiment 2

[0067] The basic steps are the same as in Example 1, and the specific parameters are shown in Table 1.

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Abstract

The invention discloses a preparation method of a solid-liquid two-phase metal-polymer heat-conducting phase-change composite material, and belongs to the technical field of polymer composites. The solid-liquid two-phase coexisting metal and a polymer material are mixed to prepare the heat-conducting phase-change composite material. According to the method, the high thermal conductivity of the composite material is realized by compounding metal in a solid-liquid coexistence region in a metal phase diagram with a polymer matrix and utilizing the high thermal conductivity coefficient and phase change latent heat of the metal; according to the composite material, binary, ternary and multivariate phase diagrams of metal are utilized, and the solid-liquid phase ratio and phase change latent heat of the metal are regulated and controlled through metal composition and a metal phase diagram lever law, so that the heat conductivity coefficient of the prepared heat-conducting phase change composite material ranges from 0.2 W m <-1 > K <-1 > to 30.0 W m <-1 > K <-1 >, and the heat dissipation requirements of various electronic devices are met.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a preparation method of a solid-liquid two-phase metal-polymer heat conduction phase change composite material. Background technique [0002] Thermally conductive phase change material is one of the important thermal interface materials, because it absorbs a large amount of latent heat when it undergoes phase change, so that it can maintain the system temperature within a narrow temperature range, and has been widely used in the field of heat dissipation of electronic components. [0003] At present, the most widely used organic phase change materials, such as paraffin, polyol, etc., are because they have a wide melting range, that is, continuous phase transition behavior occurs within the melting range range to meet the heat dissipation requirements at different temperatures. However, the disadvantage of this type of material is the small thermal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C08K3/08
CPCC09K5/063C08K3/08
Inventor 张久洋王花
Owner SOUTHEAST UNIV
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