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Flame-retardant composite material, preparation method thereof and electronic equipment

A technology of flame retardant composite materials and skeleton materials, applied in the field of composite materials, can solve the problems of enlarged pore size, unable to fully exert graphene performance, unable to meet the requirements of mechanical properties, thermal conductivity and flame retardant performance of device materials, etc. The effect of improving thermal conductivity, excellent mechanical properties, and high flame retardancy

Pending Publication Date: 2022-05-13
GUANGDONG MORION NANOTECHNOLOGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, graphene-modified polyamide composites are prepared by in-situ polymerization of three-dimensional graphene airgel and monomers of polyamide PA6, but the self-assembled three-dimensional graphene airgel cannot Structural collapse inevitably occurs, the pore size becomes larger, some graphene is repeatedly stacked and the performance of graphene cannot be fully utilized, and the prepared graphene-modified polyamide composite material can no longer meet the mechanical properties, thermal conductivity and Flame Retardancy Requirements

Method used

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  • Flame-retardant composite material, preparation method thereof and electronic equipment
  • Flame-retardant composite material, preparation method thereof and electronic equipment

Examples

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preparation example Construction

[0063] One embodiment of the present invention provides a method for preparing a flame-retardant composite material as described above, including the following steps S10-S20.

[0064] Step S10, mixing the reinforcing material, graphene oxide and solvent and performing self-assembly processing to form a three-dimensional network porous structure, and then freeze-drying to obtain a three-dimensional porous framework material.

[0065] Step S20, mixing the above-mentioned three-dimensional porous framework material, magnesium hydroxide and polyamide monomers and extruding through reaction to obtain a flame-retardant composite material.

[0066] In the preparation method of the above-mentioned flame-retardant composite material, the reinforcing material, graphene oxide and solvent are first mixed and self-assembled, and then freeze-dried. The reinforcing material is selected from at least one of carbon nanotubes and graphene fibers, and the dispersed When graphene oxide and reinfo...

Embodiment 1

[0103] (1) Add 0.018g of carbon nanotubes (tube diameter 7-15nm, tube length 1.5μm) into 500mL of GO aqueous solution with a concentration of 3mg / mL, and add 5g of dispersant sodium dodecylbenzenesulfonate at the same time, stir well Then continue ultrasonic dispersion for 30 minutes to obtain a mixed solution; then add the mixed solution to a high-pressure hydrothermal reaction kettle lined with polytetrafluoroethylene, conduct a hydrothermal treatment at 180°C to 200°C for 12 hours, and open the reaction kettle after it is fully cooled to room temperature The graphene hydrogel doped with carbon nanotubes was obtained from the reaction kettle, washed three times with deionized water, and then placed at -60°C for 48 hours to obtain a three-dimensional porous framework material with a three-dimensional network porous structure and open pores Foamy, finally broken into powder particles with a particle size of 15μ-30μm and dried at 100°C-120°C for 5 hours to remove residual moistu...

Embodiment 2

[0107] Example 2 is basically the same as Example 1, except that 30 g of the three-dimensional porous framework material is added in step (2) of Example 2, and in the flame-retardant composite material prepared in step (3), the mass of the three-dimensional porous framework material accounts for 3% of the mass of PA6, the mass of magnesium hydroxide accounts for 15% of the mass of PA6

[0108] All the other steps and process conditions are identical with embodiment 1.

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Abstract

The invention discloses a flame-retardant composite material, a preparation method thereof and electronic equipment. The flame-retardant composite material comprises a three-dimensional porous framework material, polyamide and magnesium hydroxide, the three-dimensional porous framework material has a three-dimensional net-shaped porous structure formed by self-assembly of graphene oxide and a reinforcing material; at least part of polyamide and magnesium hydroxide are loaded on the surface of the three-dimensional porous framework material, and at least part of polyamide and magnesium hydroxide are embedded into or penetrate through holes in the surface of the three-dimensional porous framework material to form a three-dimensional interpenetrating network structure; wherein the reinforcing material is selected from at least one of carbon nanotubes and graphene fibers; the mass of the three-dimensional porous framework material is 0.5%-15% of the mass of the polyamide, and the mass of the magnesium hydroxide is 5%-30% of the mass of the polyamide. The flame-retardant composite material has high thermal conductivity, high flame retardance and excellent mechanical properties.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a flame-retardant composite material, a preparation method thereof, and electronic equipment. Background technique [0002] With the development of electronic equipment towards high integration, high performance, miniaturization and functionalization, the problem of heat dissipation of devices has become increasingly important. Polyamide 6 (PA6) is often used as an engineering plastic to prepare electronic equipment because of its excellent mechanical properties, good electrical properties, wear resistance, oil resistance, self-lubrication, corrosion resistance and good processing performance. Its thermal conductivity (thermal conductivity is only 0.23W / m·k) and flame retardancy (limiting oxygen index is only 22%) are low and still need further improvement. [0003] In the prior art, graphene-modified polyamide composites are prepared by in-situ polymerization of t...

Claims

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Application Information

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IPC IPC(8): C08G69/14C08G69/16C08K7/24C08K9/00C08K3/22
CPCC08G69/14C08G69/16C08K7/24C08K9/00C08K3/22C08K2003/2224
Inventor 蔡金明杜亚平赵蓝蔚王志诚萧文秋
Owner GUANGDONG MORION NANOTECHNOLOGY CO LTD