Carbon fiber surface coating treatment method

A technology of surface coating and treatment method, applied in the direction of fiber treatment, carbon fiber, flame retardant fiber, etc., can solve the problems of complex operation, harsh experimental conditions, and high equipment requirements, achieve uniform thickness, improve inert surface, and solve poor wettability Effect

Inactive Publication Date: 2017-06-13
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a carbon fiber surface coating treatment method, which solves the problems of harsh experimental conditions, complicated operation and high equipment requirements in the existing carbon fiber coating treatment method

Method used

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Embodiment 1

[0043] Step 1. Fiber pretreatment: Burn the carbon fiber at 450°C for 40 minutes, then boil it in a nitric acid solution with a concentration of 15wt%, heat it for 40 minutes, then put it in a 5mol / L acetic acid solution, and place it for 5 min;

[0044] Step 2. Configure the sol solution: mix 1mol / L ethyl orthosilicate, 2mol / L ethanol, 15mol water and 0.2mol / L hydrochloric acid, adjust the pH of the sol solution to 2 with ammonia water, stir evenly, and let stand for 60 minutes;

[0045] Step 3, sol-gel coating treatment: place the pretreated carbon fiber obtained in step 1 in the sol solution obtained in step 2, and oscillate for 30 min with an ultrasonic oscillator, and the temperature of the water bath is 50℃, and finally the surface coated with Dense SiO 2 Coated carbon fiber.

Embodiment 2

[0047] Step 1. Fiber pretreatment: Burn the carbon fiber at 480°C for 30 minutes, then boil it in a 25wt% nitric acid solution, heat it for 50 minutes, then put it in a 6mol / L acetic acid solution, and place it for 8 min;

[0048] Step 2, configure the sol solution: mix 3mol / L ethyl orthosilicate, 3mol / L methanol, 10mol water and 0.5mol / L hydrochloric acid, adjust the pH of the sol solution to 6 with ammonia water, stir evenly, and let stand for 60 minutes;

[0049] Step 3, sol-gel coating treatment: place the pretreated carbon fiber obtained in step 1 in the sol solution obtained in step 2, and oscillate for 60 min with an ultrasonic oscillator, and the temperature of the water bath is 70°C. Dense SiO 2 Coated carbon fiber.

Embodiment 3

[0051] Step 1. Fiber pretreatment: Burn the carbon fiber at 500°C for 50 min, then boil it in a 30wt% nitric acid solution, heat it for 50 min, then put it in an 8mol / L acetic acid solution, and place it for 6 min;

[0052] Step 2, configure the sol solution: mix 2.5mol / L ethyl orthosilicate, 2mol / L methanol, 15mol water and 0.5mol / L hydrochloric acid, adjust the pH of the sol solution to 7 with ammonia water, stir evenly, and let stand for 90 min;

[0053] Step 3. Sol-gel coating treatment: Put the pretreated carbon fiber obtained in step 1 into the sol solution obtained in step 2, and oscillate for 45 minutes with an ultrasonic oscillator, and the temperature of the water bath is 70°C. Dense SiO 2 Coated carbon fiber.

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Abstract

The invention belongs to the technical field of non-metal material surface treatment and particularly relates to a carbon fiber surface coating treatment method. The method includes the steps that firstly, fiber pretreatment is conducted, wherein surface adhesive removal is conducted on carbon fibers through the burning method, then a nitric acid solution or a sodium hydroxide solution is used for roughening the carbon fibers obtained after surface adhesive removal, and the roughened carbon fibers are placed in an acetic acid solution for activation; secondly, tetraethoxysilane, a cosolvent, water and a catalyst are mixed, the pH is adjusted, the materials are evenly stirred and stand still, and a sol solution is prepared; thirdly, the pretreated carbon fibers are soaked in the sol solution, heat preservation and vibration are conducted, and the carbon fibers with the surfaces coated with compact SiO2 coatings are obtained. The preparation method solves the problems that existing carbon fiber coating treatment methods are harsh in experiment condition, complex in operation and high in equipment requirement, and is simple in process route, low in production cost and free of pollution, and raw materials are easy to obtain.

Description

Technical field [0001] The invention belongs to the technical field of surface treatment of non-metallic materials, and specifically relates to a surface coating treatment method for carbon fibers. Background technique [0002] With the continuous expansion of carbon fiber applications, people have improved their understanding of carbon fiber, and the carbon fiber market has been steadily expanded. In the future, it is expected that the main application areas of carbon fiber will focus on industrial applications, and this demand will steadily increase; in addition, a new generation of aerospace programs and other related applications will promote the industrial application of carbon fiber, so it can be said that carbon fiber The rapid development of applications will start from here. [0003] The rapid development of modern science and technology, especially the development of aviation and aerospace technology, has put forward ever-increasing requirements for material properties, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/79D06M11/64D06M11/38D06M13/188D06M101/40
CPCD06M11/79D06M11/38D06M11/64D06M13/188D06M2101/40D06M2200/30
Inventor 王震孙勇彭明军
Owner KUNMING UNIV OF SCI & TECH
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