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Epoxy resin/carbon fiber composite material and preparation method thereof

An epoxy resin and composite material technology, applied in the field of carbon fiber reinforced materials, can solve problems such as poor compatibility and shear strength loss, and achieve the effects of improving strength, improving impact strength and reducing interface stress

Active Publication Date: 2015-07-15
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, adding expansive monomers to epoxy resin / carbon fiber composites will cause loss of shear strength of epoxy resin / carbon fiber composites and poor compatibility between components

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0029] On the other hand, an embodiment of the present invention provides a method for preparing any one of the above-mentioned composite materials, the method comprising the following steps:

[0030] Step 101: Selecting a carbon fiber cloth with a predetermined layer as a carbon fiber raw material, removing impurities from the carbon fiber cloth, and then using air-cooled plasma to activate the removed carbon fiber cloth to obtain an activated carbon fiber cloth.

[0031] Step 101 generally uses carbon fiber cloth common in the art as the carbon fiber raw material, and performs impurity removal treatment on the carbon fiber cloth to remove low-molecular organic matter and other impurities existing on the carbon fiber cloth, thereby improving the bond between the carbon fiber cloth and the epoxy resin. of bonding strength. Specifically, by arranging the carbon fibers in an organic solvent (for example, acetone, tetrahydrofuran, ethanol, and combinations thereof) for 2-3 hours,...

Embodiment 1

[0052] This embodiment provides an epoxy resin / carbon fiber composite material, which includes carbon fiber, epoxy resin and silicon rubber, and the three are cross-linked with each other. Wherein, in the composite material, the weight percentage of carbon fiber is 52%.

[0053] The preparation method of this epoxy resin / carbon fiber composite material is as follows:

[0054] (1) Activate the carbon fiber cloth: soak the carbon fiber in acetone solution for 2 hours to remove low-molecular organic matter and other impurities. Then the carbon fiber cloth after impurity removal was taken out and placed in a vacuum drying oven for drying at a temperature of 50° C. for 40 minutes. The dried carbon fiber cloth was then subjected to air-cooled plasma treatment to activate the carbon fiber cloth. Wherein, during the air-cooled plasma treatment process, the treatment power is 400W, the treatment pressure is 40Pa, and the treatment time is 30min.

[0055] (2) Preparation of liquid si...

Embodiment 2

[0059] This embodiment provides an epoxy resin / carbon fiber composite material, which includes carbon fiber, epoxy resin and silicon rubber, and the three are cross-linked with each other. Wherein, in the composite material, the weight percentage of carbon fiber is 50%.

[0060] The preparation method of this epoxy resin / carbon fiber composite material is as follows:

[0061] (1) Activation treatment of carbon fiber cloth: Soak the carbon fiber arrangement in tetrahydrofuran solution for 3 hours to remove low-molecular organic matter and other impurities. Then the carbon fiber cloth after impurity removal was taken out and dried in a vacuum drying oven at a temperature of 80° C. for 60 min. The dried carbon fiber cloth was then subjected to air-cooled plasma treatment to activate the carbon fiber cloth. Wherein, during the air-cooled plasma treatment process, the treatment power is 330W, the treatment pressure is 41Pa, and the treatment time is 35min.

[0062] (2) Preparati...

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Abstract

The present invention discloses an epoxy resin / carbon fiber composite material and a preparation method thereof, and belongs to the field of carbon fiber-reinforced materials. The epoxy resin / carbon fiber composite material comprises a silicon rubber, wherein the silicon rubber is simultaneously cross-linked with the epoxy resin and carbon fibers. According to the present invention, the silicon rubber is added to the composite material to simultaneously cross-link the silicon rubber, the epoxy resin and the carbon fibers so as to prepare the composite material with the good epoxy resin, carbon fiber and silicon rubber compatibility; and the silicon rubber is added to the composite material so as to effectively reduce the interfacial stress force of the composite material and increase the strength, wherein the impact strength of the material of the present invention is increased by 30-45% compared to the conventional silicon rubber-free epoxy resin / carbon fiber composite material.

Description

technical field [0001] The invention relates to the field of carbon fiber reinforced materials, in particular to an epoxy resin / carbon fiber composite material and a preparation method thereof. Background technique [0002] Epoxy resin / carbon fiber composite material is a high-strength material with excellent properties such as high specific strength, high specific modulus, high temperature resistance, and corrosion resistance. It is widely used in aerospace, automobiles, electronics, sporting goods, medical equipment, etc. . Since the performance of epoxy resin / carbon fiber composites depends on the carbon fiber body used, the epoxy resin matrix and the bonding strength between the two. However, due to the large gap between the thermal expansion coefficients of epoxy resin and carbon fiber, it is easy to cause large interfacial thermal residual stress in the cured epoxy resin / carbon fiber composite. In addition, the epoxy resin / carbon fiber composite also has shrinkage re...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L83/07C08K7/06
Inventor 徐蕤熊建民洪丽陈大华秦玉林
Owner CHERY AUTOMOBILE CO LTD
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