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Preparation method of carbon fiber/polyetheretherketone composite material

A technology of polyether ether ketone and composite materials, applied in the direction of coating, etc., can solve the problems of carbon fiber and multi-walled carbon nanotubes that are difficult to disperse uniformly, high melting point and melt viscosity, etc., and achieve low cost and excellent preparation process Simple, good workmanship

Inactive Publication Date: 2009-10-14
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Polyetheretherketone (PEEK) material has excellent heat resistance and mechanical properties, and can be made into thick, thin and complex-shaped parts by different molding methods, but PEEK has a high melting point and melt viscosity, carbon fiber and It is extremely difficult for multi-walled carbon nanotubes (MWNT) to be uniformly dispersed in PEEK melt
For this reason, at present, the solid alloying method is generally adopted, so that the MWNT can be mixed and uniformly dispersed with the PEEK powder at the same time of chopping and unwrapping to obtain a PEEK / MWNT composite material, but this method has the following disadvantages: The flow orientation of the fibers in the melt, and thus the significantly anisotropic electrical conduction behavior of molded parts of this material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The weight percentage of the composite material components is blended according to the weight percentage of polyether ether ketone: 89%, carbon fiber: 10%, carbon nanotube: 1%, and then the particles are placed in an air circulation furnace for drying, in (150±3) Place it at a temperature of ℃ for 3h until the moisture content is less than 0.02%. When drying, the granular material should be scattered in the pan with a thickness of about 2.5cm; after taking it out of the air circulation furnace, the granular material should be placed in the barrel. According to the plasticization mechanism of the composite material in the barrel, it is heated in three stages. The temperature of the section is 350℃, with cooling water to prevent the material from bridging, to ensure higher solid conveying efficiency, the temperature of the middle section is 360℃, and the temperature of the front section is 380℃ to ensure that the material is in a fully molten state. The mold temperature is 20...

Embodiment 2

[0016] The weight percentages of the composite material components are blended according to the weight percentage of polyether ether ketone: 79%, carbon fiber: 11%, carbon nanotube: 10%, and then the particles are placed in an air circulation furnace for drying, at (160±3) Place it at a temperature of ℃ for 2h until the moisture content is less than 0.02%. When drying, the granular material should be scattered in the pan with a thickness of about 2.5cm; after taking it out of the air circulation furnace, the granular material should be placed in the barrel. According to the plasticization mechanism of the composite material in the barrel, it is heated in three stages. The temperature of the section is 350℃, and there is cooling water to prevent the material from bridging and ensure higher solid conveying efficiency. The temperature of the middle section is 370℃ and the temperature of the front section is 390℃ to ensure that the material is in a fully molten state. The mold tempera...

Embodiment 3

[0019] The weight percentage of the composite material is blended according to the weight percentage of polyether ether ketone: 80%, carbon fiber: 15%, carbon nanotube: 5%, and then the particles are placed in an air circulation furnace for drying, in (150±3) Place it at a temperature of ℃ for 3h until the moisture content is less than 0.02%. When drying, the granular material should be scattered in the pan with a thickness of about 2.5cm; after taking it out of the air circulation furnace, the granular material is placed in the barrel. According to the plasticization mechanism of the composite material in the barrel, it is heated in three stages. The rear temperature is 350°C, with cooling water to prevent material from bridging, to ensure higher solid conveying efficiency, the middle temperature is 360°C, and the front temperature is 390°C to ensure that the material is in a fully molten state. The mold temperature is 220°C, the screw speed is 60r / min, and the carbon fiber / polye...

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Abstract

The invention relates to a preparation method of carbon fiber / polyetheretherketone composite material. The preparation method comprises the following steps of: mechanical blending the following materials: 10 to 20 percent of carbon fiber, 79 to 89 percent of polyetheretherketone and 1 to 10 percent of carbon nanotube according to weight proportion; arranging prepared particles in an air circulating furnace for drying, placing for 3h under the temperature of 150 DEG C plus or minus 3 DEG C, or placing for 2h under the temperature of 160 DEG C plus or minus 3 DEG C till the weight proportion of water is less than 0.02 percent; taking out the particle materials, arranging the particle materials in a material barrel, heating by three sections; wherein the temperature of the rear section is 350 DEG C, cooling water is used for cooling so as to prevent the material from bridging, the temperature of the middle section is 360 to 370 DEG C, the temperature of the front section is 380 to 390 DEG C, the temperature of the mold is 200 to 220 DEG C and the rotating speed of a screw is 50 to 60r / min; injection-molding and preparing fiber / polyetheretherketone composite material. The prepared composite material has good electrical conductivity and can be used for the fields of military industry, aerospace and the like.

Description

Technical field [0001] The invention relates to a preparation method of a carbon fiber / polyetheretherketone composite material, which can be used as an alternating current conductive material under a high temperature environment. Background technique [0002] Carbon nanotubes (CNT) have unique high electrical conductivity, can pass a larger current density, and compound with polymer can greatly improve the conductivity of polymer composites. It can be used in electromagnetic shielding, wave absorption, infrared stealth, and overcurrent. Protectors, anti-static, conductive and other aspects have huge application prospects. [0003] At present, domestic and foreign research literature on the AC conductivity of polymer-based carbon nanotube composites mainly involves lower temperature resin systems such as epoxy resin polypropylene, polystyrene, and polycarbonate. There are few studies on conductivity. [0004] Polyether ether ketone (PEEK) material has excellent heat resistance and...

Claims

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Application Information

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IPC IPC(8): C08L61/02C08K7/06C08K3/04B29C45/00B29C45/76
Inventor 李健周洲
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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