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Carbon fiber resin-based composite material and preparation method thereof

A technology of carbon fiber resin-based and composite materials, which is applied in the field of carbon fiber resin-based composite materials and can solve problems such as failure of composite materials

Pending Publication Date: 2021-04-20
LINGNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Composite materials will inevitably change due to various external conditions during use, such as ultraviolet radiation, humidity, temperature, acid, alkali, salt and other chemical components will have different effects on the performance of composite materials, and then make composite materials invalid

Method used

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  • Carbon fiber resin-based composite material and preparation method thereof
  • Carbon fiber resin-based composite material and preparation method thereof
  • Carbon fiber resin-based composite material and preparation method thereof

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preparation example Construction

[0022] The invention provides a method for preparing a carbon fiber resin-based composite material, comprising the following steps:

[0023] Mix carbon fibers and acid reagents, and perform surface oxidation treatment to obtain oxidized carbon fibers;

[0024] Mixing the oxidized carbon fibers with thionyl chloride, and performing surface acyl chloride treatment to obtain carbon acid chloride fibers;

[0025] In subcritical water, the acyl chloride carbon fiber, melamine solution and condensation agent are mixed for grafting to obtain modified carbon fiber;

[0026] mixing epoxy-containing resin matrix, carboxyl-terminated nitrile rubber, curing agent and coupling agent, and modifying to obtain modified resin;

[0027] The carbon fiber bundle formed by the modified carbon fiber is soaked in the melted modified resin, and after curing, a carbon fiber resin-based composite material is obtained.

[0028] In the present invention, unless otherwise specified, the required prepara...

Embodiment 1

[0055] Clean the carbon fibers, then place them in concentrated nitric acid (68% mass concentration), and carry out surface oxidation treatment at 95° C. for 1 hour to obtain oxidized carbon fibers;

[0056] Mix the oxidized carbon fibers with thionyl chloride (the mass ratio of oxidized carbon fibers to thionyl chloride is 1:20), perform surface acid chlorination treatment at 70°C for 22 hours, wash the resulting product with alcohol, filter and dry in sequence to obtain acid chloride carbon fiber;

[0057] In subcritical water, the carbonyl chloride fiber and melamine solution (3g / L) and 20mg dicyclohexylcarbodiimide (the mass ratio of carbonyl chloride fiber, melamine solution and condensing agent are 1:5:0.1) are loaded into In the reaction kettle, put the reaction kettle in an oven and heat it to 350°C for 15 minutes to carry out grafting. After the reaction is over, after the reaction kettle is cooled to room temperature, take out the fiber product, wash it with deionize...

Embodiment 2

[0061] Clean the carbon fibers, then place them in concentrated nitric acid (68% mass concentration), and perform surface oxidation treatment at 85° C. for 1 hour to obtain oxidized carbon fibers;

[0062] Mix the carbon oxide fiber with thionyl chloride (the mass ratio of carbon oxide fiber to thionyl chloride is 1:20), carry out surface acid chlorination treatment at 70°C for 24 hours, wash the obtained product with alcohol in sequence, filter and dry to obtain the acid chloride carbon fiber;

[0063] In subcritical water, the carbonyl chloride fiber and melamine solution (3g / L) and 20mg dicyclohexylcarbodiimide (the mass ratio of carbonyl chloride fiber, melamine solution and condensing agent are 1:5:0.1) are loaded into In the reaction kettle, put the reaction kettle in an oven and heat it to 350°C for 15 minutes to carry out grafting. After the reaction is over, after the reaction kettle is cooled to room temperature, take out the fiber product, wash it with deionized wat...

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Abstract

The invention provides a carbon fiber resin-based composite material and a preparation method thereof, and belongs to the technical field of carbon fiber resin-based composite materials. The preparation method of the carbon fiber resin-based composite material comprises the following steps: mixing carbon fibers and an acid reagent, and carrying out surface oxidation treatment to obtain oxidized carbon fibers; mixing the oxidized carbon fiber with thionyl chloride, and carrying out surface acylating chlorination treatment to obtain acylating chlorinated carbon fiber; in subcritical water, mixing the acylating chlorination carbon fiber, a melamine solution and a condensing agent, and grafting to obtain a modified carbon fiber; mixing the epoxy group-containing resin matrix, carboxyl-terminated nitrile rubber, a curing agent and a coupling agent, and modifying to obtain modified resin; and infiltrating a carbon fiber bundle formed by the modified carbon fibers into the molten modified resin, and curing to obtain the carbon fiber resin-based composite material. The carbon fiber resin-based composite material prepared by the invention has excellent impact resistance and aging resistance.

Description

technical field [0001] The invention relates to the technical field of carbon fiber resin-based composite materials, in particular to a carbon fiber resin-based composite material and a preparation method thereof. Background technique [0002] Due to its excellent advantages of high strength and low quality, carbon fiber reinforced composite materials are widely used in aerospace, military, chemical and other manufacturing fields. Carbon fiber is a fibrous polymer carbon formed by carbonizing organic fibers at high temperatures in an inert atmosphere. It is an inorganic non-metallic material with a carbon content of more than 90%. Carbon fiber has excellent properties such as light weight, high specific strength, high specific rigidity, high modulus, and good chemical stability. It is widely used as a reinforcement in the field of resin-based composite materials. [0003] Epoxy resin matrix is ​​conducive to the preparation of composite materials, which can further improve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/06C08L63/10C08L13/00C08K9/04C08K9/02C08K7/06C08K5/544
Inventor 杨银环陈小军莫德云夏小群弓满锋马兴灶
Owner LINGNAN NORMAL UNIV
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