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A kind of interface modified carbon fiber/resin matrix composite material and preparation method thereof

A composite material and carbon fiber technology, used in carbon fiber, fiber processing, textiles and papermaking, etc., can solve the problems of low fiber surface grafting rate, decreased carbon fiber bulk performance, affecting the overall performance of composite materials, etc.

Active Publication Date: 2016-02-03
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the low content of reactive functional groups on the surface of carbon fibers and the low grafting rate on the fiber surface, the improvement of the tensile strength and bending strength of the composite is very limited.
Excessive pretreatment to increase the reactive functional groups hydroxyl and carboxyl on the surface of the fiber will inevitably lead to a decrease in the performance of the carbon fiber body, and ultimately affect the overall performance of the composite material.

Method used

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  • A kind of interface modified carbon fiber/resin matrix composite material and preparation method thereof
  • A kind of interface modified carbon fiber/resin matrix composite material and preparation method thereof
  • A kind of interface modified carbon fiber/resin matrix composite material and preparation method thereof

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preparation example Construction

[0101] Fabrication of interfacially reinforced composites

[0102] The above-mentioned method is used to prepare interface-reinforced and modified carbon fibers, and then the carbon fibers are fixed on the substrate and shaped through a composite material forming process to obtain the composite material.

[0103] The forming process of the interface reinforced composite material of the present invention is not limited, and the available forming processes include (but not limited to): vacuum assisted resin injection molding process, resin film infiltration molding process, autoclave forming process and compression molding process. Preferably, the forming process of the present invention is an autoclave forming process.

[0104] In a preferred example of the present invention, the steps of the composite material forming process are as follows:

[0105] The modified carbon fiber bundles are arranged and fixed in one direction, impregnated with a resin solution, and the solvent i...

Embodiment 1

[0118] Step (1) Oxidation treatment of carbon fiber precursors: add 1 part by weight of carbon fiber to 100 parts by weight of 98% sulfuric acid, then reflux at a temperature of 100°C for 2 hours, take out the carbon fiber and wash it with deionized water until the washing liquid is neutral , and dried at a temperature of 60°C to obtain surface oxidized carbon fibers;

[0119] Step (2) prepares the carbon fiber that surface is connected with hexachlorocyclotriphosphazene: acid-binding agent and carbon oxide fiber are put into anhydrous tetrahydrofuran according to 15:100 weight ratio, then the hexachlorocyclotriphosphazene of 5 parts by weight is dissolved Slowly add the above reaction solution into the solvent, react at 30°C for 24 hours, take out the carbon fiber and wash it with solvent for several times, and dry it in a vacuum oven at 60°C for later use.

[0120] Step (3) Grafting polyphosphazene on the surface of carbon fiber: put 100 parts by weight of carbon fibers graf...

Embodiment 2

[0123] Step (1) Oxidation treatment of carbon fiber precursor (unsizing): put 10 parts by weight of carbon fiber into 100 parts by weight of 60% nitric acid, then reflux at a temperature of 60°C for 2 hours, then filter and wash with deionized water until The washing solution is neutral, and the surface oxidized carbon fibers are obtained by drying at a temperature of 80°C.

[0124] Step (2) prepares the carbon fiber that the surface is connected with hexachlorocyclotriphosphazene: acid-binding agent and carbon oxide fiber are put into anhydrous tetrahydrofuran according to the weight ratio of 40:100, then the hexachlorocyclotriphosphazene of 15 parts by weight is dissolved Slowly add the above reaction solution into the solvent, react at 30°C for 12 hours, take out the carbon fiber and wash it with solvent for several times, and dry it in a vacuum oven at 60°C for later use.

[0125] Step (3) Grafting polyphosphazene on the surface of carbon fibers: putting 100 parts by weigh...

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Abstract

The invention discloses an interface enhanced modification method of a carbon fiber composite material. Specifically, the method disclosed by the invention comprises the steps of connecting hexachlorocyclotriphosphazene on the surface of carbon fiber, and performing in-situ polymerization and grafting of polyphosphazene to obtain modified carbon fiber with active groups on the surface. Therefore, the number of interface chemical bonds of the carbon fiber and resin matrix composite material is increased, so that the interface performances of the carbon fiber and resin matrix composite material are significantly improved. The invention further provides the carbon fiber prepared on the basis of the method, a composite material prepared by using the carbon fiber, and a product prepared by using the composite material.

Description

technical field [0001] The invention belongs to the field of interface modification of composite materials, in particular to an interface-modified carbon fiber / resin-based composite material and a preparation method thereof. Background technique [0002] Carbon fiber reinforced polymer matrix composites are widely used in aerospace, automobiles, ships, sporting goods and other fields due to their light weight, high specific strength and high specific rigidity. The interface is a unique and extremely important component of composite materials, which directly affects the transmission and dispersion of stress in composite materials, as well as the process of damage accumulation and crack propagation inside materials, and greatly affects the strength and toughness of materials. macro performance. However, the surface of carbon fiber is inert, the surface energy is low, the functional groups with chemical activity are few, and the wettability between the resin and the two-phase ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/673D06M11/55D06M11/64C08K9/04C08K9/02C08K7/06C08J5/06C08L63/00C08L75/04B29C70/34D06M101/40
Inventor 张笑晴徐海兵李晓拓颜春范欣愉
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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