Carbon fiber reinforced resin film and preparation method thereof

A technology of resin film and carbon fiber, which is applied in the field of carbon fiber reinforced resin film and its preparation, can solve the problems of easy sliding of carbon fiber, unsatisfactory enhancement effect of mechanical strength of polymer film, and low force, etc. Effect

Active Publication Date: 2021-04-02
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the limited specific surface area of ​​carbon fiber, the force between the polymer molecular chain in the polymer film is not large, so the carbon fiber is easy to slide in the polymer film and cannot be effectively fixed, which makes it difficult for the mechanical strength of the polymer film. The enhancement effect is not ideal

Method used

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  • Carbon fiber reinforced resin film and preparation method thereof
  • Carbon fiber reinforced resin film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 The preparation method of a carbon fiber reinforced resin film involved in this embodiment includes the following steps:

[0029] Step 1. Add 1 g of multi-walled carbon nanotubes to a mixed solution of 100 mL of concentrated sulfuric acid and concentrated nitric acid (3:1), stir at room temperature for 24 hours, dilute with a large amount of water, filter with suction, wash with water, and air dry at room temperature;

[0030] Step 2: Heat the carbon fiber at 350°C for 6 hours to remove the organic matter on the surface of the carbon fiber, so that the surface can have hydroxyl groups, and then add 0.7 g of the above-treated carbon fiber to a mixed solution of 100 mL of ethanol and water (1:1), add Add 1g KH-550, let stand for 24h at room temperature, wash with water, and dry;

[0031] Step 3. Add 0.5mg / mL carboxyl group-modified multi-wall carbon nanotube dispersion into the electrolytic cell, connect the carbon fiber to the positive electrode of the power ...

Embodiment 2

[0033] Example 2 The preparation method of a carbon fiber reinforced resin film involved in this embodiment includes the following steps:

[0034] Step 1. Add 1 g of multi-walled carbon nanotubes to a mixed solution of 100 mL of concentrated sulfuric acid and concentrated nitric acid (3:1), stir at room temperature for 24 hours, dilute with a large amount of water, filter with suction, wash with water, and air dry at room temperature;

[0035] Step 2: Heat the carbon fiber at 350°C for 6 hours to remove the organic matter on the surface of the carbon fiber, so that the surface can have hydroxyl groups, and then add 0.7 g of the above-treated carbon fiber to a mixed solution of 100 mL of ethanol and water (1:1), add Add 1g KH-550, let stand for 24h at room temperature, wash with water, and dry;

[0036] Step 3. Add 0.5mg / mL carboxyl group-modified multi-wall carbon nanotube dispersion into the electrolytic cell, connect the carbon fiber to the positive electrode of the power ...

Embodiment 3

[0038] Example 3 The preparation method of a carbon fiber reinforced resin film involved in this embodiment includes the following steps:

[0039] Step 1. Add 1 g of multi-walled carbon nanotubes to a mixed solution of 100 mL of concentrated sulfuric acid and concentrated nitric acid (3:1), stir at room temperature for 24 hours, dilute with a large amount of water, filter with suction, wash with water, and air dry at room temperature;

[0040] Step 2: Heat the carbon fiber at 350°C for 6 hours to remove the organic matter on the surface of the carbon fiber, so that the surface can have hydroxyl groups, and then add 0.7 g of the above-treated carbon fiber to a mixed solution of 100 mL of ethanol and water (1:1), add Add 1g KH-550, let stand for 24h at room temperature, wash with water, and dry;

[0041] Step 3: Add 0.5 mg / mL carboxy-modified multi-walled carbon nanotube dispersion into the electrolytic cell, connect the carbon fiber to the positive pole of the power supply, con...

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Abstract

The invention provides a carbon fiber reinforced resin film and a preparation method thereof. The resin film comprises a resin matrix and a carbon fiber dispersed phase doped in the resin matrix. The surface of carbon fiber in the carbon fiber dispersed phase is modified with carbon nanotube. The preparation method comprises the following steps: S1, amino-modifying the surface of carbon fiber and then carrying out electrophoretic deposition of carboxyl-modified carbon nanotube to obtain carbon nanotube surface-modified carbon fiber; and S2, cutting the carbon nanotube surface-modified carbon fiber obtained in the S1 into segments, immersing each segment of carbon fiber part into a polymer solution, taking out, bonding two segments of carbon fiber, and drying so as to obtain the carbon fiber reinforced resin film. According to the invention, content of carbon nanotube on the surface of the carbon fiber can be effectively adjusted so as to further regulate mechanical strength of the carbon fiber doped resin film and achieve the reinforcing effect of the carbon fiber on the resin film. The resin film of the invention has a broad prospect in practical application.

Description

technical field [0001] The invention relates to a carbon fiber reinforced resin film and a preparation method thereof, belonging to the technical field of composite materials. Background technique [0002] Organic polymer resin films have the advantages of high elasticity, strong plasticity, high hardness, wear resistance, heat resistance, and strong electrical insulation, but their mechanical strength is extremely limited, mainly due to the weak van der Waals forces between polymer molecular chains. , resulting in the low mechanical strength of the polymer film, which limits its practical application. Carbon fiber is a new type of fiber material with high strength and high modulus with a carbon content of more than 95%. It is a microcrystalline graphite material obtained by carbonization and graphitization by stacking organic fibers such as flake graphite microcrystals along the fiber axial direction. Carbon fiber is "soft on the outside and rigid on the inside", which is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L29/04C08K9/02C08K9/06C08K7/06
CPCC08J5/18C08J2329/04C08K7/06C08K9/02C08K9/06C08L2203/16C08L29/04
Inventor 张亚非杨超胡南滔张丽玲杨志
Owner SHANGHAI JIAO TONG UNIV
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