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PA6/MgO thermal-conductive composite material and preparation method thereof

A heat-conducting composite material and mixing technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of high cost, wear and tear of production equipment, achieve low cost, increase the degree of close packing, and facilitate industrial promotion and application Effect

Inactive Publication Date: 2017-06-30
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The Chinese patent document with the publication number CN102408710A discloses a nylon composite material with high thermal conductivity prepared by using nylon 66, boron nitride, silicon carbide, aluminum nitride, aluminum oxide and other raw materials. The raw material nylon used is more expensive than nylon. The price of boron nitride and aluminum nitride is between a few hundred yuan and a few thousand yuan per kilogram, and the cost is high
The Mohs hardness of silicon carbide and alumina are both above 9, which will cause serious wear and tear on production equipment

Method used

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  • PA6/MgO thermal-conductive composite material and preparation method thereof
  • PA6/MgO thermal-conductive composite material and preparation method thereof
  • PA6/MgO thermal-conductive composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The component parts by weight of the PA6 / MgO thermally conductive composite material of the present embodiment are as follows:

[0056]

[0057] The MgO filler includes MgO filler A and MgO filler B; the particle size of the MgO filler A is 1-10 μm; the MgO filler B is 30-50 μm; MgO filler A:B=1:4.

[0058] According to the above parts by weight, the PA6 / MgO heat-conducting composite material is obtained by modifying, mixing and granulating, which specifically includes the following steps:

[0059] Step (1): Modification:

[0060] Dilute the silane coupling agent by weight with ethanol to obtain a coupling agent solution, then add the compound magnesium oxide filler to the coupling agent solution, mix at 100°C for 30 minutes, take it out and place it in Dried in an oven at 120°C to constant weight to obtain a modified magnesium oxide filler;

[0061] Step (2): Mixing:

[0062] The prepared modified magnesia filler is mixed with the PA6 and antioxidant of said weig...

Embodiment 2

[0067] Compared with Example 1, the difference is that the components by weight of the PA6 / MgO thermally conductive composite material of this example are as follows:

[0068]

[0069] The MgO filler includes MgO filler A and MgO filler B; the particle size of the MgO filler A is 1-10 μm; the MgO filler B is 30-50 μm; MgO filler A:B=1:3.

[0070] According to the above parts by weight, modify, mix, and granulate to obtain the PA6 / MgO heat-conducting composite material. The thermal conductivity of the PA6 heat-conducting composite material obtained is 1.8923W / (m K), and the tensile strength is 91.52 MPa, impact strength 14.45kJ m -2 .

Embodiment 3

[0072] Compared with Example 1, the difference is that the components by weight of the PA6 / MgO thermally conductive composite material of this example are as follows:

[0073]

[0074]

[0075] The MgO filler includes MgO filler A and MgO filler B; the particle size of the MgO filler A is 1-10 μm; the MgO filler B is 30-50 μm; MgO filler A:B=1:2.

[0076] According to the above parts by weight, modify, mix, and granulate to obtain the PA6 / MgO heat-conducting composite material. The thermal conductivity of the PA6 heat-conducting composite material obtained is 1.7246W / (m K), and the tensile strength is 92.43 MPa, impact strength 14.00kJ m -2 .

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Abstract

The invention relates to the technical field of a high-molecular thermal-conductive composite material, particularly to a high-filling-amount PA6 / MgO thermal-conductive composite material and a preparation method thereof. The PA6 / MgO thermal-conductive composite material includes the following raw materials, according to a mass percentage ratio, 30-60 parts of PA6 resin, 40-70 parts of a thermal-conductive filling material, 0.5-1.5 parts of a silicane coupling agent, and 0.4-1.2 parts of an anti-oxidant. The composite material is high in thermal-conductive coefficient and excellent in mechanical properties, and MgO acted as the filling material is uniformly dispersed in the PA6 substrate. The preparation method is simple in process, mature in technology and low in cost, allows high-thermal-conductive-coefficient engineering plastics to be prepared to meet different production requirements, and therefore is beneficial for popularization and application.

Description

technical field [0001] The invention belongs to the field of polymer material processing, and in particular relates to a PA6 / MgO heat-conducting composite material with a high MgO filling content. [0002] technical background [0003] PA6 resin is polyamide 6, commonly known as nylon 6. It is one of the most commonly used engineering materials. It has the characteristics of thermoplasticity, light weight, good toughness, chemical resistance and durability. It is generally used in auto parts, mechanical parts, electronics, etc. Electrical appliances, engineering accessories and other products have become one of the most used thermoplastics and one of the hot topics in the preparation of thermally conductive composite materials. [0004] The thermal conductivity of PA6 resin is low, generally around 0.2 (W / m·K). The shortcoming of its low thermal conductivity also greatly limits its scope of use and service life. Therefore, to develop and prepare PA6 materials with high ther...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K13/06C08K9/06C08K3/22C09K5/14
CPCC08K13/06C08K3/22C08K9/06C08K2003/222C08K2201/003C08K2201/014C09K5/14C08L77/02
Inventor 王哲徐徽陈康王超
Owner CENT SOUTH UNIV
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