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

A nylon composite material, electromagnetic shielding technology, used in magnetic field/electric field shielding, electrical components and other directions, can solve the problems of high thermal conductivity, unsatisfactory axial thermal conductivity, unsatisfactory thermal conductivity, etc., achieve good compatibility, improve axial The effect of improving thermal conductivity and thermal conductivity and electromagnetic shielding performance

Active Publication Date: 2022-05-10
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon fiber is a two-dimensional material, which has excellent electrical and thermal conductivity along the fiber axis, but the thermal conductivity in the radial direction is not ideal, and it is prone to orientation during melt blending injection molding, resulting in higher thermal conductivity of the composite material. The axial heat conduction is not ideal

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1kg of nylon 6, 200g of nylon 66, 800g of carbon fiber, 10g of silicone powder, 4g of antioxidant 1098, and 4g of antioxidant 626 were vacuum-dried at 85°C for 12 hours, pelletized by twin-screw extrusion, and then injection molded into mechanical test samples Strips, thermal conductivity test discs, electromagnetic shielding test strips.

[0033] 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

[0035] 1kg of nylon 6, 200g of nylon 66, 200g of mesophase carbon microspheres, 600g of carbon fiber, 10g of silicone powder, 4g of antioxidant 1098, and 4g of antioxidant 626 were vacuum-dried at 85°C for 12 hours, and granulated by twin-screw extrusion , and then injection-molded mechanical test specimens, thermal conductivity test discs, and electromagnetic shielding test specimens.

[0036] 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

[0038] 1kg of nylon 6, 200g of nylon 66, 400g of mesophase carbon microspheres, 400g of carbon fiber, 10g of silicone powder, 4g of antioxidant 1098, and 4g of antioxidant 626 were vacuum-dried at 85°C for 12 hours, and granulated by twin-screw extrusion , and then injection-molded mechanical test specimens, thermal conductivity test discs, and electromagnetic shielding test specimens.

[0039] 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 discloses a high-strength high-thermal-conductivity electromagnetic shielding nylon composite material and a preparation method thereof. The composite material is prepared from the following raw materials in parts by weight: 40-60 parts of nylon resin, 20-40 parts of carbon fibers, 20-40 parts of mesocarbon microbeads, 0.1-5 parts of a dispersing agent and 0.1-1 part of an antioxidant. According to the invention, the micron-sized spherical mesocarbon microbeads and the short carbon fibers are utilized to generate a bridging effect, so that a perfect heat-conducting network is formed, the heat-conducting property and the electromagnetic shielding property are greatly improved, and the strength of the composite material is also greatly improved under the enhancement action of the carbon fibers.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic shielding and heat-conducting materials, and in particular relates to a high-strength and high-heat-conducting electromagnetic-shielding nylon composite material and a preparation method thereof. Background technique [0002] With the advancement of science and technology, the miniaturization and integration of electronic devices are rapidly developing, and the heat generation of equipment is gradually increasing, and the requirements for thermally conductive materials are also getting higher and higher. Moreover, when electronic components work, electromagnetic waves will be generated, and electromagnetic waves will cause electromagnetic interference to electronic components. Excessive electromagnetic interference will affect the normal operation of other components. Therefore, it is urgent to develop new electromagnetic shielding materials to ensure the normal operation of components. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L77/06C08K7/06C08K7/18H05K9/00
CPCC08L77/02H05K9/0081C08L77/06C08K7/06C08K7/18
Inventor 吴波震杨裕豪
Owner ZHEJIANG UNIV OF TECH
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