Preparation method of modified coating of carbon fiber surface

A surface modification, carbon fiber technology, applied in the direction of carbon fiber, fiber treatment, chemical instruments and methods, etc., can solve the problems of weak interface between carbon fiber and resin matrix, and achieve increased surface roughness and surface energy, fiber adsorption capacity improvement, Efficient effect

Inactive Publication Date: 2013-04-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of the weak interface between carbon fiber and resin matrix in existing carbon fiber composite materials, and provide a preparation method of carbon fiber surface modification coating

Method used

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  • Preparation method of modified coating of carbon fiber surface
  • Preparation method of modified coating of carbon fiber surface

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specific Embodiment approach 1

[0020] Specific embodiment one: the preparation method of the carbon fiber surface modification coating of the present embodiment is carried out according to the following steps:

[0021] 1. Pre-polymerization of phenolic resin: In the phenolic resin pre-polymerization reactor, 50 parts of monomeric phenolic compounds, 40-70 parts of aldehyde compounds and 0.5-5 parts of catalyst are mixed in parts by weight. React at 20°C~200°C for 0.01~600min to obtain phenolic resin slurry;

[0022] 2. Coating of phenolic resin slurry: inject the phenolic resin slurry obtained in step 1 into the dipping tank, and then soak the carbon fiber in the dipping tank for 0.01~300min to obtain carbon fiber coated with phenolic resin prepolymer on the surface;

[0023] 3. Curing of phenolic resin: put the carbon fiber coated with phenolic resin prepolymer obtained in step 2 into the high temperature curing reaction chamber, and react for 0.1~300min under the conditions of pressure 0.1~100MPa and temp...

specific Embodiment approach 2

[0032] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the phenolic compound described in step one is phenol, o-cresol, m-cresol, p-cresol, o-chlorophenol, p-chlorophenol, 1 -A mixture of one or more of naphthol, p-aminophenol and o-aminophenol in any ratio. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0033] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the aldehyde compounds described in step one are formaldehyde, n-propionaldehyde, isobutyraldehyde, acetaldehyde, o-phthalaldehyde, cinnamaldehyde, A mixture of one or more of glyoxal, benzaldehyde and o-chlorobenzaldehyde in any ratio. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of a modified coating of a carbon fiber surface, relating to the field of preparation of carbon fiber. The invention aims at solving the problem of a weak interface between the carbon fiber and resin matrix in the existing carbon fiber composite material. The invention comprises the following operations of 1. prepolymerization of phenolic resin slurry; 2. coating of phenolic resin slurry; 3. curing of phenolic resin; and 4. carbonization of phenolic resin. The interlayer shearing strength of the full-carbon coating of the carbon fiber surface prepared by the preparation method is improved by 12-15%; the fiber absorption ability is obviously improved and the full-carbon coating is a good catalyst carrier. The carbon fiber full-carbon coating structure disclosed by the invention is controllable, and can provide different functions to the carbon fiber or can be applied to different varieties of resin matrix composite materials by adjusting the chemical ingredients and ingredient proportions of phenolic aldehyde. According to the preparation method disclosed by the invention, the simplicity, high efficiency and good effect are realized and industrial production is easy. The preparation method is applied to the fields such as aviation, spaceflight, military affairs, buildings and the like.

Description

technical field [0001] The invention relates to the field of carbon fiber preparation. Background technique [0002] Carbon fiber is a fibrous carbon material with a lower density than metal aluminum, but higher strength than steel, and has the characteristics of corrosion resistance and high modulus. Advanced carbon fiber composites play an important role in aviation, aerospace, military, construction and other fields. The interface of carbon fiber composite materials plays a decisive role in its performance. The interface directly affects the stress dispersion and transmission between the carbon fiber composite material fiber and the resin matrix, thereby affecting the damage accumulation and crack propagation process of the composite material, and then affecting the fracture toughness of the carbon fiber composite material. [0003] The graphite-like structure of carbon fiber determines that its surface is chemically inert. Due to the large surface inertia of carbon fib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/74C08G8/04C08J5/06C08K9/02C08K7/06H01B1/04B01J20/20B01J20/28B01J32/00B01J35/06D06M101/40
Inventor 黎俊黄玉东刘丽胡帧宋元军
Owner HARBIN INST OF TECH
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