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Carbon fiber reinforced polyamide composite material and preparation method thereof

A composite material and carbon fiber technology, applied in the polymer field, can solve problems such as low utilization rate, and achieve the effects of improving surface polarity, simple production process and improving adhesion

Inactive Publication Date: 2012-01-11
ANHUI KEJU NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The silane coupling agent is easy to self-condense into siloxane oligomers during use, the actual utilization rate is low, and the part that is effectively chemically bonded to the surface of the glass fiber is also very easy to hydrolyze

Method used

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preparation example Construction

[0025] The invention provides a carbon fiber-reinforced polyamide composite material and a preparation method thereof. In the invention, the carbon fiber is subjected to surface treatment, which specifically includes: wherein the carbon fiber surface treatment agent is prepared from the following components according to mass percentage: solvent 0-99% ; Polyacrylonitrile 1-100%.

[0026] The solvent is a polar solvent, including one or more of water, ethanol, methanol, and acetone. The carbon fibers are polyacrylonitrile-based carbon fibers. The polyacrylonitrile is a liquid polyacrylonitrile oligomer with a molecular weight range of 106-10000 Daltons.

[0027] Carbon fiber surface treatment method, the specific steps include:

[0028] Step 1: mix polyacrylonitrile and solvent according to mass percentage and stir evenly;

[0029] Step 2: soaking the carbon fiber in the solvent of step 1;

[0030] Step 3: Pre-oxidize the impregnated carbon fibers in an oven at 50-300 degree...

Embodiment 1

[0033] The preparation method of composite material is as follows: polyamide resin mass ratio is: 69.6%; Lubricant (zinc stearate) mass ratio is: 0.2%; Antioxidant (phenolic antioxidant four [beta-(3 ', 5'-di-tert-butyl-4'-hydroxyphenyl)propionic acid]pentaerythritol ester) mass ratio: 0.2%. Mix for 4 minutes in a high-speed mixer;

[0034] The uniformly mixed components are placed in a twin-screw extruder, melted, mixed, extruded and granulated, and 30% of the carbon fiber is fed into the extruder by side feeding;

[0035] The processing temperature is zone 1 temperature: 240-250℃, zone 2 temperature: 245-260℃, zone 3 temperature: 245-260℃, zone 4 temperature: 250-270℃, zone 5 temperature: 250-280℃, zone 6 Zone temperature: 250-275°C, zone seven temperature: 250-260°C, host speed: 300-350rpm.

[0036] The particles completed by the above method are dried in a blast oven at 90-110°C for 4 hours in advance, and then the dried particle materials are injection-molded on the inj...

Embodiment 2

[0038] The preparation mode of composite material is as follows: polyamide resin mass ratio is: 59.6%; Lubricant (zinc stearate) mass ratio is: 0.1%; Antioxidant (phenolic antioxidant four [beta-(3 ', 5'-di-tert-butyl-4'-hydroxyphenyl) propionate] pentaerythritol ester) mass ratio: 0.3%. Mix for 4 minutes in a high-speed mixer;

[0039] The uniformly mixed components are placed in a twin-screw extruder, melted, mixed, extruded and granulated, and 40% of the carbon fiber is fed into the extruder by side feeding;

[0040] The processing temperature is zone 1 temperature: 240-250℃, zone 2 temperature: 245-260℃, zone 3 temperature: 245-260℃, zone 4 temperature: 250-270℃, zone 5 temperature: 250-280℃, zone 6 Zone temperature: 250-275°C, zone seven temperature: 250-260°C, host speed: 300-350rpm.

[0041] The particles completed by the above method are dried in a blast oven at 90-110°C for 4 hours in advance, and then the dried particle materials are injection-molded on the injecti...

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Abstract

The invention discloses a carbon fiber reinforced polyamide (PA) composite material and a preparation method thereof. The composite material consists of the following components in percentage by mass: 60 to 80 percent of polyamide, 0.1 to 0.3 percent of lubricant, 0.1 to 0.3 percent of antioxidant and 20 to 40 percent of carbon fibers. In the invention, the adhesive bonding property of the carbonfibers and a polarity polyamide resin matrix is improved and the mechanical property of the material is strengthened mainly by carrying out surface treatment on the carbon fibers by liquid polyacrylonitrile. The carbon fiber reinforced polyamide composite material has the advantages that the surface polarity of the carbon fibers is improved; the adhesive bonding property of the carbon fibers and the resin matrix is strengthened; and the obtained carbon fiber reinforced polyamide material has high strength, high toughness and simple production process and can be widely applied to a high-performance structural material for vehicles, military apparatus and aviation.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a carbon fiber reinforced polyamide composite material and a preparation method thereof. Background technique [0002] Polyamide (PA, nylon) modified engineering plastics have the following characteristics: high melting point, excellent heat resistance and self-extinguishing properties; excellent balance of toughness, durability, electrical properties and other physical properties; excellent oil resistance High performance, chemical resistance; excellent wear resistance, creep resistance and aging resistance. Therefore, nylon engineering plastics are widely used in industrial fields. [0003] Carbon fiber has the characteristics of high strength, low density, high temperature resistance, water resistance and corrosion resistance, and is an excellent high-strength reinforcing material. The polymer resin reinforced with carbon fiber is a very important high-performance structura...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L77/06C08L77/02C08K13/06C08K9/04C08K7/06D06M15/31B29B9/06B29C47/92B29C45/78D06M101/40B29C48/92
CPCB29C48/92
Inventor 徐东徐永黄新政
Owner ANHUI KEJU NEW MATERIALS
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