Preparation method of carbon fiber surface full-carbon coating
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A carbon fiber and carbon coating technology, applied in the directions of carbon fiber, fiber processing, textiles and papermaking, can solve the problems of weak interface between carbon fiber and resin matrix, and achieve increased surface roughness and surface energy, good stability, and preparation method. simple effect
Inactive Publication Date: 2013-04-17
HARBIN INST OF TECH
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[0004] The purpose of the present invention is to solve the problem of the weak interface between carbon fiber and resin matrix in the existing carbon fiber composite material, and provide a preparation method of carbon fiber surface full carbon coating
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specific Embodiment approach 1
[0021] Specific embodiment one: the preparation method of the carbon fiber surface all-carbon coating of the present embodiment is carried out according to the following steps:
[0022] 1. Carbon fiber treatment: pretreat the surface of carbon fiber, immerse the treated carbon fiber in deionized water, wash it for 0.01~120min, put it in an oven, and bake it at 90℃~500℃ for 0.01~60min to obtain carbon fiber acid treatment Taste;
[0023] Two, the pre-polymerization of phenolic resin: in the phenolic resin pre-polymerization reactor, by weight parts, the monomeric phenolic compound of 50 parts, the aldehyde compound of 40~70 parts and the catalyst of 0.5~5 part are mixed, in React at 50°C~200°C for 0.01~600min to obtain phenolic resin slurry;
[0024] 3. Coating of phenolic resin slurry: inject the phenolic resin slurry obtained in step 2 into the dipping tank, and then soak the carbon fiber acid-treated product obtained in step 1 in the dipping tank for 0.01~300min to obtain a...
specific Embodiment approach 2
[0034] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the pretreatment described in step 1 is acid treatment, plasma treatment, plasma beam treatment, ultraviolet irradiation treatment or gamma ray deal with. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0035] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the phenolic compound described in step two is phenol, o-cresol, m-cresol, p-cresol, o-chlorophenol, p-chlorophenol , 1-naphthol, p-aminophenol, ortho-aminophenol or a mixture composed of any ratio. Others are the same as in the first or second embodiment.
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Abstract
The invention relates to a preparation method of a carbon fiber surface full-carbon coating, relating to the field of preparation of carbon fibers and solving the problem of weak interface between the carbon fiber and a resin matrix in the existing carbon fiber composite material. The preparation method comprises the following steps of: 1, treating a carbon fiber; 2, pre-polymerizing phenolic resin; 3, coating phenolic resin slurry; 4, curing the phenolic resin; and 5, carbonizing the phenolic resin. The interlaminar shear strength of the prepared carbon fiber surface full-carbon coating is respectively improved by 12-53 percent; and the fiber adsorption capacity is remarkably improved; and the carbon fiber surface full-carbon coating is a good catalyst carrier. The carbon fiber surface full-carbon coating is controllable in structure; different functions can be endowed on the carbon fiber or the carbon fiber can be applied to different kinds of resin matrix composite materials through regulating the chemical composition and the component proportioning of phenolic aldehyde. The preparation method has the advantages of simplicity in operation, high efficiency and good effect; and the industrialized production is easily realized. The carbon fiber surface full-carbon coating is applied to the fields such as aviation, aerospace, military and building.
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...
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