Preparation method of high-thermal-conductivity composite material

A technology of composite materials and thermally conductive materials, which is applied in the field of preparation of high thermally conductive composite materials, can solve the problems of polymer mechanical properties, lower processing performance, poor affinity between fillers and polymer matrix, and limit the application of thermally conductive composite materials. The effect of reduced mechanical properties, superior thermal conductivity, and good mechanical properties

Active Publication Date: 2020-10-02
中节能(唐山)环保装备有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of filler added becomes the determining factor of thermal conductivity, and a large amount of filler will inevitably lead to the reduction of polymer mechanical properties and processing properties, limiting its application
[0005] Patent CN108017820A discloses a fiber-reinforced high-density polyethylene / graphene composite material and its preparation method, with plant fibers and graphene as additives for hybrid filling, which Although this method can improve the mechanical properties of composite materials to a certain extent, it has limited influence on thermal conductivity.
[0006] In the current study, the poor affinity and uneven dispersion of fillers to the polymer matrix, the increase in thermal conductivity and the decrease in mechanical properties limit the thermal conductivity Application of Composite Materials

Method used

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  • Preparation method of high-thermal-conductivity composite material

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Experimental program
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Effect test

Embodiment 1

[0029] Such as figure 1 As shown, the invention provides a kind of preparation method of high thermal conductivity composite material, comprises the following steps:

[0030] 1) Proportioning according to the following components and parts by weight:

[0031] The thermally conductive material is a mixture of graphene and copper powder, including 0.4 parts of graphene and 0.1 part of copper powder;

[0032] The dispersant is a silane coupling agent, 0.8 parts;

[0033] The natural organic polymer material is starch, 2 parts;

[0034] Polymer powder is polyethylene, 100 parts;

[0035] 2) Add graphene, copper powder, silane coupling agent, starch, and polyethylene into the aqueous solution according to the ratio of step 1) and use ultrasonic dispersion for pre-dispersion treatment. After the pre-dispersion treatment, transfer it to an autoclave reactor for Heat treatment, the treatment temperature is 150°C, the pressure is 0.25MPa, and the reaction process is continuously st...

Embodiment 2

[0039] The invention provides a method for preparing a high thermal conductivity composite material, comprising the following steps:

[0040] 1) Proportioning according to the following components and parts by weight:

[0041] The thermally conductive material is a mixture of graphene and alumina, of which 0.4 parts of graphene and 0.1 parts of alumina;

[0042] The dispersant is a titanate coupling agent, 0.7 parts;

[0043] The natural organic polymer material is cyclodextrin, 1.5 parts;

[0044] Polymer powder is polyethylene, 100 parts;

[0045] 2) Add graphene, alumina, titanate coupling agent, chitosan, and polyethylene into the aqueous solution according to the ratio of step 1) and use ultrasonic dispersion for pre-dispersion treatment. After pre-dispersion treatment, transfer to autoclaved Heat treatment is carried out in the reaction kettle, the treatment temperature is 150°C, the pressure is 0.25MPa, and the reaction process is continuously stirred;

[0046] 3) F...

Embodiment 3

[0049] The invention provides a method for preparing a high thermal conductivity composite material, comprising the following steps:

[0050] 1) Proportioning according to the following components and parts by weight:

[0051] The thermal conductive material is a mixture of carbon microspheres and silicon carbide, wherein 0.2 parts of carbon microspheres and 0.2 parts of silicon carbide;

[0052] The dispersant is an aluminate coupling agent, 1.5 parts;

[0053] The natural organic polymer material is cellulose, 2.5 parts;

[0054] Polymer powder is polyethylene, 100 parts;

[0055]2) Add carbon microspheres, silicon carbide, aluminate coupling agent, cellulose, and polyethylene into the aqueous solution according to the ratio of step 1), and use a sand mill to disperse for pre-dispersion treatment, and transfer after pre-dispersion treatment Carry out heat treatment in the autoclave reactor, the treatment temperature is 160°C, the pressure is 0.3MPa, and the reaction proce...

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Abstract

The invention discloses a preparation method of a high-thermal-conductivity composite material. The method comprises the following steps: adding a heat conduction material, a dispersing agent, a natural organic polymer material and polymer powder into an aqueous solution in parts by weight, and carrying out pre-dispersion treatment; after pre-dispersion treatment, transferring the mixture into anautoclave reactor for heat treatment; after heating treatment, carrying out drying treatment, adding the dried product into an organic solvent after drying, grinding, carrying out an electrostatic spinning technology to obtain micron-sized mixed heat-conducting polymer fiber yarns, and carrying out melt extrusion and granulation on the heat-conducting polymer fiber yarns by using a double-screw extruder to obtain the high-heat-conducting polymer master batch. The high-heat-conducting polymer master batch has the advantages of low addition amount of a heat-conducting filler, excellent heat-conducting property, favorable dispersity and the like, has favorable mechanical properties, obtains high heat conductivity, has favorable mechanical properties, and solves the problems of poor affinity and non-uniform dispersion between heat-conducting filler and a polymer matrix, higher heat conductivity, lower mechanical properties and the like.

Description

technical field [0001] The invention relates to the technical field of high thermal conductivity composite materials, in particular to a preparation method of high thermal conductivity composite materials. Background technique [0002] Plastic has the advantages of light weight, chemical stability, corrosion resistance, easy processing, etc. It has a wide range of applications in electronic appliances, packaging industry, automobile industry, machinery manufacturing and aerospace. However, the low thermal conductivity of plastics limits their applications. [0003] In order to obtain plastics with high thermal conductivity, the usual method is to add thermal conductive fillers. For example, Wang Wen et al. used graphene as a thermal conductive filler and added it to polypropylene materials. When the graphene content was 60%, the thermal conductivity increased to 1.32W / (m K), which is 14 times higher than that of pure polypropylene, but the thermal stability decreases accor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L3/02C08L5/16C08L1/02C08L23/12C08L5/08C08K13/02C08K3/04C08K3/08C08K3/22C08K13/04C08K7/18C08K3/34C09K5/14B29B9/06
CPCC08L23/06C08L23/12C09K5/14B29B9/06C08K2003/085C08K2003/2227C08L2205/03C08L3/02C08K13/02C08K3/042C08K3/08C08L5/16C08K3/22C08L1/02C08K13/04C08K7/18C08K3/34C08L5/08
Inventor 吴洪鹏耿晓欣侯林艳吴萧良黄勇崔五力
Owner 中节能(唐山)环保装备有限公司
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