Preparation method of carbon fiber surface composite coating

A surface composite, carbon fiber technology, applied in the direction of carbon fiber, fiber treatment, fabric surface trimming, etc., can solve the problem of the weak interface between carbon fiber and resin matrix, etc., to increase the surface roughness and surface energy, good effect and close connection. Effect

Inactive Publication Date: 2013-04-03
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of weak interface between carbon fiber and resin matrix in the carbon fiber composite material prepared by the existing method, and to provide a method for preparing a composite coating on the surface of carbon fiber

Method used

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  • Preparation method of carbon fiber surface composite coating

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specific Embodiment approach 1

[0009] Specific Embodiment 1: This embodiment is a preparation method of a carbon fiber surface composite coating, which is specifically completed according to the following steps: 1. Pretreatment of carbon fibers: first, carbon fibers are pretreated on the fiber surface, and the pretreatment is 1min to 120min , the surface pretreated carbon fiber is obtained after taking it out, and the surface pretreated carbon fiber is washed with deionized water for 1min~120min, and then the washed surface pretreated carbon fiber is placed in an oven at a temperature of 90°C~500°C Drying for 1min~60min, the pretreatment of carbon fiber is completed, and the pretreated carbon fiber is obtained; 2. Coating: soak the pretreated carbon fiber in phenolic resin slurry for 1min~300min, and get the surface coated phenolic resin after taking it out Carbon fibers of resin prepolymers; 3. Curing: Curing the carbon fibers coated with phenolic resin prepolymers obtained in step 2 at a pressure of 0.1MPa...

specific Embodiment approach 2

[0010] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the pretreatment liquid described in step 1 is acid treatment, plasma treatment or gamma ray treatment. Others are the same as the first embodiment.

specific Embodiment approach 3

[0011] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 1, the carbon fiber is firstly immersed in the pretreatment liquid to pretreat the surface of the fiber, and the pretreatment lasts for 5 minutes to 110 minutes. For the treated carbon fiber, use deionized water to wash the surface pretreated carbon fiber for 5min~110min, then place the washed surface pretreated carbon fiber in an oven, and dry it at a temperature of 80℃~360℃ for 5min~55min , that is, the pretreatment of carbon fibers is completed to obtain pretreated carbon fibers. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a preparation method of a carbon fiber surface composite coating, relates to a preparation method of a composite coating and aims to solve the problem that a weak interface exists between carbon fibers and a resin matrix in the carbon fiber composite material prepared by the existing method. The method comprises the following steps: 1, pretreating carbon fibers; 2, applying; 3, curing; 4, carbonizing; and 5, functionalizing the coating, thus obtaining the carbon fiber surface composite coating. The invention has the following advantages: 1, the interlaminar shear strengths of composite materials are respectively increased by 20-70%; 2, the composite materials are in close contact with the carbon fibers, can not be peeled easily and are favorable in stability; 3, by adjusting the chemical composition and component ratio of a phenol formaldehyde resin size, the carbon fibers can be endued with different functions, or the phenol formaldehyde resin size can be used for different kinds of resin matrix composite materials; and 4, the preparation method is a continuous method, has the advantages of high simplicity, high efficiency and favorable effect, and is easy to realize industrial production. The invention is mainly used for the preparation of a carbon fiber surface composite coating.

Description

technical field [0001] The invention relates to a preparation method of a composite coating. 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. The carbon fiber industry plays an important role in the upgrading of pillar industries in developed countries and the improvement of the overall quality of the national economy. It is also of great significance to the adjustment of my country's industrial structure and the upgrading of traditional materials. 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, and has been recognized as a basic and common research topic throughout the development of composite materials. The interface directly affects the stress ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/74D06M11/79D06M11/46D06M15/643D06M11/49D06B15/00D06C7/00D06C7/04C08K9/10C08K7/06D06M101/40
Inventor 黎俊黄玉东刘丽宋元军胡帧
Owner HARBIN INST OF TECH
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