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High-strength high-thermal-conductivity nylon composite material and preparation method thereof

A nylon composite material and high thermal conductivity technology, which is applied in the field of high-strength and high thermal conductivity nylon composite materials and its preparation, can solve the problems of difficult dispersion of melt blending, small particle size of graphene and carbon nanotubes, and easy agglomeration, etc., to achieve improved Mechanical properties and thermal stability, strong interfacial interaction, and the effect of reducing interfacial thermal resistance

Active Publication Date: 2021-07-23
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Carbon materials such as graphene and carbon nanotubes have excellent thermal conductivity and electrical conductivity, but the particle size of graphene and carbon nanotubes is small and easy to agglomerate, so it is difficult to achieve good dispersion by simple melt blending

Method used

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  • High-strength high-thermal-conductivity nylon composite material and preparation method thereof
  • High-strength high-thermal-conductivity nylon composite material and preparation method thereof
  • High-strength high-thermal-conductivity nylon composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1.5kg of nylon 66, 450g of spherical alumina, 7.5g of silicone powder, 3g of antioxidant 1098, and 3g of antioxidant 626 were vacuum-dried at 85°C for 12 hours, granulated by twin-screw extrusion, and then injection-molded into mechanical splines and wafers.

[0048] The temperature of each zone of the extruder: Zone 1: 260°C, Zone 2: 265°C, Zone 3: 270°C, Zone 4: 275°C, Zone 5: 280°C, Zone 6: 280°C, Zone 7: 275°C, Zone 8 : 270°C, District 9: 270°C, District 10: 275°C. The specific performance is shown in Table 2.

Embodiment 2

[0050] 1.35kg of nylon 66, 150g of graphene nylon 6 masterbatch, 450g of spherical alumina, 7.5g of silicone powder, 3g of antioxidant 1098, and 3g of antioxidant 626 were vacuum-dried at 85°C for 12 hours, and produced by twin-screw extrusion. Granules, and then injection molding mechanical splines and discs.

[0051] The temperature of each zone of the extruder: Zone 1: 260°C, Zone 2: 265°C, Zone 3: 270°C, Zone 4: 275°C, Zone 5: 280°C, Zone 6: 280°C, Zone 7: 275°C, Zone 8 : 270°C, District 9: 270°C, District 10: 275°C. The specific performance is shown in Table 2.

Embodiment 3

[0053] 1.35kg of nylon 66, 150g of graphene nylon 6 masterbatch, 450g of spherical alumina, 150g of carbon fiber, 7.5g of silicone powder, 3g of antioxidant 1098, and 3g of antioxidant 626 were vacuum-dried at 85°C for 12h, passed through a twin-screw Extrusion granulation, and then injection molding mechanical splines and discs.

[0054] The temperature of each zone of the extruder: Zone 1: 260°C, Zone 2: 265°C, Zone 3: 270°C, Zone 4: 275°C, Zone 5: 280°C, Zone 6: 280°C, Zone 7: 275°C, Zone 8 : 270°C, District 9: 270°C, District 10: 275°C. The specific performance is shown in Table 2.

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Abstract

The invention provides a high-strength high-thermal-conductivity nylon composite material and a preparation method thereof. The nylon composite material is prepared from the following raw materials in parts by weight: 100 parts of nylon resin, 5-30 parts of carbon fibers, 10-30 parts of thermal conductive filler, 0.1-5 parts of a dispersing agent and 0.1-5 parts of an antioxidant, the nylon resin is composed of 5-30% of graphene nylon master batch and 70-95% of pure nylon resin; and carbon nanotubes are grafted on the surfaces of the carbon fibers. According to the invention, high-thermal-conductivity fillers such as graphene and carbon nanotubes are pretreated and then subjected to melt blending, so that the fillers are well dispersed and a thermal conduction path can be constructed at a low content, the thermal conductivity of the composite material is remarkably improved, and the carbon fibers are added into the matrix, so that the overall mechanical property of the material is improved, the dimensional stability is improved, and the water absorption rate of the nylon is reduced.

Description

technical field [0001] The invention belongs to the technical field of heat-conducting materials, and in particular relates to a high-strength, high-heat-conducting nylon composite material and a preparation method thereof. Background technique [0002] Thermally conductive polymer composite materials are a kind of polymer composite material system with thermal conductivity function prepared by adding thermally conductive fillers with polymer materials as the matrix. It has attracted widespread attention due to its low cost, simple processing technology and suitability for large-scale production. [0003] Most of the thermally conductive nylons on the market are directly melt-blended with thermally conductive fillers and nylon, but often need to add more thermally conductive fillers to have a significant effect. However, too high a filler content will cause an increase in melt viscosity, which is not conducive to industrial production and limits the application of thermally...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L77/02C08K13/06C08K9/10C08K7/06C08K3/04C08K7/18C08J3/22C09K5/14
CPCC08L77/06C08J3/226C09K5/14C08J2477/02C08J2377/06C08K3/042C08L77/02C08K13/06C08K9/10C08K7/06C08K3/041C08K7/18
Inventor 吴波震杨裕豪
Owner ZHEJIANG UNIV OF TECH
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