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A kind of carbon fiber/epoxy resin composite material and preparation method thereof

A technology of epoxy resin and composite materials, which is applied in the field of composite materials, can solve the problems of poor compatibility and the decline of mechanical properties of carbon fiber/epoxy resin composite materials, and achieve the effects of good compatibility, improved mechanical properties and low viscosity

Active Publication Date: 2017-07-11
WUHU LION AUTOMOTIVE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The artificial rubber provided by the prior art has poor compatibility with epoxy resin, which can easily cause the mechanical properties of carbon fiber / epoxy resin composites to decline

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] On the other hand, an embodiment of the present invention provides a method for preparing the above-mentioned carbon fiber / epoxy resin composite material, comprising: mixing epoxy resin, liquid silicone rubber, and epoxy resin diluent and stirring evenly, and then adding epoxy resin After the curing agent continues to stir evenly, an epoxy resin matrix material is obtained; the epoxy resin matrix material is soaked into the carbon fiber fabric by a vacuum bag pressing method, and then cured to obtain a carbon fiber / epoxy resin composite material.

[0030] As a preference, an embodiment of the present invention provides a more specific method for preparing a carbon fiber / epoxy resin composite material, including:

[0031] 1) Mix and stir epoxy resin, liquid silicone rubber, and epoxy resin diluent for 1-3 hours, preferably 2 hours. After forming a uniform mixing system, add epoxy resin curing agent and continue stirring for 1-3 hours, preferably 2h, forming epoxy resin m...

Embodiment 1

[0045] This embodiment provides a carbon fiber / epoxy resin composite material, including 3K twill carbon fiber cloth, and an epoxy resin matrix material filled with voids in the 3K twill carbon fiber cloth. Among them, the epoxy resin matrix material includes the following components by weight: 100 parts of bisphenol S type epoxy resin with a viscosity of 4210mPa·s; 14 parts of hydroxyl-terminated liquid nitrile rubber with a viscosity of 2300mPa·s; 25 parts of glycidyl ether; 20 parts of diethylenetriamine.

[0046] The preparation method of this composite material is as follows:

[0047] 1), the above-mentioned bisphenol S-type epoxy resin, hydroxyl-terminated liquid nitrile rubber, and butyl glycidyl ether were mixed and stirred for 2 hours. After a uniform mixed system was formed, diethylenetriamine was added and stirred for 2 hours to form a ring Oxygen base material.

[0048] 2) Trim, lay up and shape the 3K twill carbon fiber cloth, cover the surface with release clot...

Embodiment 2

[0052] This embodiment provides a carbon fiber / epoxy resin composite material, including 3K twill carbon fiber cloth, and an epoxy resin matrix material filled with voids in the 3K twill carbon fiber cloth. Among them, the epoxy resin matrix material includes the following components by weight: 100 parts of bisphenol A epoxy resin, whose viscosity is 5400mPa·s; 20 parts of hydroxyl-terminated liquid polybutadiene, whose viscosity is 1800mPa·s; 35 parts of propylene glycol diglycidyl ether; 24 parts of m-xylylenediamine.

[0053] The preparation method of this composite material is as follows:

[0054] 1) Mix the above-mentioned bisphenol A epoxy resin, hydroxyl-terminated liquid polybutadiene, and polypropylene glycol diglycidyl ether and stir for 2 hours. After forming a uniform mixed system, add m-xylylenediamine and continue stirring for 2 hours. , forming an epoxy resin matrix material.

[0055] 2) Trim, lay up and shape the 3K twill carbon fiber cloth, cover the surface...

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Abstract

The invention discloses a carbon fiber / epoxy resin composite material and a preparation method thereof, belonging to the field of composite materials. The preparation method comprises the following steps: soaking a carbon fiber textile in an epoxy resin base material, and curing. The epoxy resin base material comprises the following components in parts by weight: 100 parts of epoxy resin, 10-30 parts of liquid silicon rubber, 10-35 parts of epoxy resin diluter and 20-35 parts of epoxy resin curing agent. The carbon fiber / epoxy resin composite material provided by the embodiment of the invention has the advantages of favorable component compatibility and favorable mechanical properties; and the impact toughness can reach 205 KJ / m<2> which is enhanced by at least 43% as compared with the common carbon fiber / epoxy resin composite material.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a carbon fiber / epoxy resin composite material and a preparation method thereof. Background technique [0002] Carbon fiber / epoxy resin composite material is a kind of composite material with epoxy resin as matrix and carbon fiber as reinforcement. It has high specific strength, high specific modulus, high temperature resistance, corrosion resistance, fatigue resistance and other superior properties, and is widely used In aerospace, automobile, electronics, sporting goods and medical equipment and other fields. However, due to the brittleness of epoxy resin after curing, poor impact toughness and flexural strength, it is easy to spread rapidly when it is loaded or microcracks are generated due to defects, so that the carbon fiber / epoxy resin composite material fails. Therefore, it needs to be toughened to improve its impact toughness. Therefore, it is necessary to provide a ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/02C08L15/00C08K7/06
Inventor 徐蕤熊建民洪丽陈大华秦玉林
Owner WUHU LION AUTOMOTIVE TECH CO LTD
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