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 functional group content, low fiber surface grafting rate, affecting the overall performance of composite materials, etc.

Active Publication Date: 2014-06-11
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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  • Interface modified carbon fiber/resin matrix composite material and preparation method thereof
  • Interface modified carbon fiber/resin matrix composite material and preparation method thereof
  • Interface modified carbon fiber/resin matrix composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[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 grafted with hexachlorocyclotriphosphazene into anhydrous acetonitrile, and then add 4,4'-diamino with a total weight of 30 parts by weight Add diphenyl ether and hexachlorocyclotriphosphazene to the above reaction solution, wherein the molar ratio of 4,4'-diaminodiphenyl ether and hexachlorocyclotriphosphazene is 3.3:1.0, and then add 60 parts by weight after dissolving The...

Embodiment 2

[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 weight of carbon fibers grafted with hexachlorocyclotriphosphazene into anhydrous acetonitrile, and then adding 60 parts by weight of 4,4'-diamino Add diphenyl ether and hexachlorocyclotriphosphazene to the above reaction solution, wherein the molar ratio of 4,4'-diaminodiphenyl ether and hexachlorocyclotriphosphazene is 4.0:1.0, and then add 120 parts by weight after dissolving Th...

Embodiment 3

[0132] Step (2) prepares the carbon fiber that the surface is connected with hexachlorocyclotriphosphazene: put acid-binding agent and carbon oxide fiber into anhydrous tetrahydrofuran according to the weight ratio of 55:100, then dissolve 20 parts by weight of hexachlorocyclotriphosphazene Slowly add to the above reaction solution in the solvent, react at 50°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.

[0133] Step (3) Grafting polyphosphazene on the surface of carbon fibers: put 100 parts by weight of carbon fibers grafted with hexachlorocyclotriphosphazene into anhydrous acetonitrile, and then add 4,4'-diamino Add diphenyl ether and hexachlorocyclotriphosphazene to the above reaction solution, wherein the molar ratio of 4,4'-diaminodiphenyl ether and hexachlorocyclotriphosphazene is 4.5:1.0, and then add 100 parts by weight after dissolving The acid-binding agent was stirred and rea...

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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 Applications(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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