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Surface modification method for M40J graphite fibers

A surface modification, graphite fiber technology, applied in fiber treatment, textile and papermaking, physical treatment, etc., can solve the problems of difficult surface modification treatment of M40J graphite fiber, less heteroatom content, less relative active points, etc. Interfacial bonding ability, increasing bonding effect, reducing the effect of interfacial stress

Inactive Publication Date: 2015-01-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the surface of the existing M40J graphite fiber is difficult to modify the surface of the M40J graphite fiber because of the high degree of graphitization and the well-developed crystal region, which has less heteroatom content and relatively less active points. , and provide a M40J graphite fiber surface modification method

Method used

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  • Surface modification method for M40J graphite fibers
  • Surface modification method for M40J graphite fibers
  • Surface modification method for M40J graphite fibers

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Effect test

specific Embodiment approach 1

[0022] Specific embodiment one: present embodiment a kind of M40J graphite fiber surface modification method, it is realized by following steps:

[0023] 1. Disperse graphene oxide in E-51 epoxy resin-acetone solution to make slurry;

[0024] 2. Put the M40J graphite fiber into the slurry obtained in step 1 for dip coating;

[0025] 3. The M40J graphite fiber dip-coated in step 2 is irradiated with gamma rays under inert gas or vacuum conditions to complete the surface modification of the M40J graphite fiber;

[0026] Wherein, the mass concentration of graphite oxide in the slurry described in step 1 is 2% to 5%, and the mass concentration of E-51 epoxy resin-acetone solution is 10% to 30%;

[0027] The irradiation dose described in step 3 is 50-100KGy, and the irradiation dose rate is 6.0-10.0KGy / h.

[0028] This embodiment includes the following beneficial effects:

[0029] 1. M40J graphite fiber is a high-modulus and high-strength fiber. Compared with other ordinary fibe...

specific Embodiment approach 2

[0033] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the gamma rays described in step three are 60 Co gamma-rays. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0034] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the irradiation dose in Step 3 is 60-80KGy. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a surface modification method for M40J graphite fibers, relates to a surface modification method for fibers, and aims at solving the problem that the surface modification treatment of the M40J fibers is difficult to carry out because the existing M40J fibers are high in graphitization degree, perfect in crystalline region development, low in heteroatom content, low in fiber surface energy and less in relative active spot. The surface modification method comprises the following steps of: 1, dispersing graphene oxide in an E-51 epoxy resin-acetone solution to prepare a slurry; 2, putting the M40J fibers into the slurry obtained in the step 1 for dip coating; and 3, irradiating the M40J fibers, which are subjected to dip coating in the step 2, by using gamma rays under an inert gas or vacuum condition to realize a grafting reaction between graphene oxide and the surfaces of the M40J fibers, and introducing active groups on a lamella of graphene oxide into the surfaces of the fibers to finish the modification process. The surface modification method is simple in operation, stable in process, reliable in quality and suitable for industrial production, and is applied to the field of composite materials.

Description

technical field [0001] The invention relates to a fiber surface modification method. Background technique [0002] High modulus carbon fiber and its composite materials are one of the important materials used in high-tech fields such as aerospace, new energy, transportation, oil and gas development, storage and transportation. M40J graphite fiber has the advantages of excellent mechanical properties, high temperature resistance, good dimensional stability, good chemical stability, and low thermal expansion coefficient, so it is considered to be an ideal reinforcement material for advanced composite materials, and is favored by the majority of composite material science and technology workers. However, the unique graphite inert structure and smooth surface of M40J graphite fiber lead to poor interfacial bonding performance of the composite material, which greatly affects the strength of the fiber in the composite material. Weak interfacial bonding restricts the application o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M10/10D06M10/06
Inventor 张春华刘雅薇钱艺豪黄玉东
Owner HARBIN INST OF TECH
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