Method for continuously forming silicon carbide coating on surfaces of carbon fibers

A silicon carbide coating and carbon fiber technology, which is applied in the chemical characteristics of fibers, coatings, electrolytic coatings, etc., can solve the problems of continuous processing of difficult-to-long fibers, expensive reaction equipment, poor coating uniformity, etc., and the bonding force is not easy to fall off , Easy to operate, good binding effect

Inactive Publication Date: 2011-10-19
TAIYUAN XIKE NANO TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The chemical vapor deposition method is used to prepare carbon fibers with a silicon carbide coating on the surface, and the reaction equipment is expensive, and harmful gases such as hydrogen chloride, etc. are generated during the reaction; while the method of forming a silicon carbide coating by surface coat...

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  • Method for continuously forming silicon carbide coating on surfaces of carbon fibers
  • Method for continuously forming silicon carbide coating on surfaces of carbon fibers

Examples

Experimental program
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Embodiment 1

[0027] The specific embodiments will be further described with reference to the schematic structural diagram of the electrophoretic device in the accompanying drawings.

[0028] Take 50 grams of carbon nano-silicon particles and add them to 1000 grams of water. After ultrasonic treatment for 0.5 hours, add 1.05 grams of ethylenediamine and stir for 2 hours to obtain silicon carbide electrophoretic fluid; cm, the outer diameter is 5 cm, and the graphite tube 2 with a length of 30 cm redirects the carbon fiber from the pay-off wheel 5 arranged on the electric swimming pool 1 top through the first lead-in wheel 4 and the second lead-in wheel 3, so that the carbon fiber changes direction from the graphite One end of the tube 2 enters, passes through the other end of the graphite tube 2, and then passes through the first lead-out wheel 6 and the second lead-out wheel 7 to redirect, and fixes the front end of the carbon fiber on the take-up wheel 8; then pours the silicon carbide ele...

Embodiment 2

[0031]Take 3 grams of silicon carbide nanowires, add them to 3000 grams of isopropanol, and after ultrasonic treatment for 0.5 hours, add 4 grams of n-butylamine and ultrasonic for 2 hours to obtain silicon carbide electrophoretic fluid; 6 cm, the outer diameter is 10 cm, and the length is 60 cm graphite tube 2, then the carbon fiber is installed on the electrophoresis device (the method is the same as that of Example 1); The surface is located 2 cm above the graphite tube 2, and a stirring device is placed in the battery 1 at the same time, and then the positive pole of the power supply with a voltage of 100V is connected to the graphite tube 2, and the negative pole is connected to the carbon fiber, and the graphite tube 2 is used as the anode, and the carbon fiber is used as the cathode; turn on the stirring The device mixes the silicon carbide electrophoretic liquid, connects the power supply, and starts the traction motor, so that the carbon fiber is deposited in the cente...

Embodiment 3

[0033] Take 100 grams of silicon carbide nanoparticles treated with strong acid, add them to 2000 grams of butanol, and after ultrasonic treatment for 1 hour, add 105 grams of elemental iodine and stir for 0.5 hours to obtain silicon carbide electrophoretic fluid; A graphite tube 2 with an inner diameter of 4 cm, an outer diameter of 8 cm, and a length of 60 cm is installed on the electrophoresis device (the method is the same as in Example 1); , so that the liquid level is located 5 cm above the graphite tube 2, and at the same time, a stirring device is placed in the battery 1, and then the positive pole of the power supply with a voltage of 150V is connected to the graphite tube 2, and the negative pole is connected to the carbon fiber, and the graphite tube 2 is used as the anode, and the carbon fiber is used as the cathode. Turn on the stirring device to mix the silicon carbide electrophoretic liquid, turn on the power supply, and start the traction motor, so that the carb...

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Abstract

The invention provides a method for continuously forming silicon carbide coating on surfaces of carbon fibers, relates to the surface coating technology of the carbon fibers, and in particular relates to a technology for continuously forming silicon carbide coating on the surfaces of the carbon fibers by using an electrophoresis method. The technical problems to be solved are as follows: a methodcapable of continuously forming silicon carbide coating on the surfaces of the carbon fibers is provided, has simple equipment, and is convenient and fast to operate. The employed technical schemes are as follows: first step. preparing a silicon carbide electrophoretic fluid; second step. fixing a graphite tube and installing the carbon fibers in an electrophoresis tank; third step. switching on a power supply and carrying out silicon carbide electrophoretic deposition; and fourth step. blast-drying to obtain finished good carbon fibers. The method provided by the invention can continuously form silicon carbide coating on the surfaces of the carbon fibers, is simple and fast to operate, and has low cost; and the prepared carbon fibers with the silicon carbide coating have the characteristics of smooth surface, uniform coating and good binding between the coating and substrate, and the coating is not easy to fall off.

Description

technical field [0001] The invention relates to a method for continuously coating silicon carbide on the surface of carbon fiber, which relates to a technology for coating the surface of carbon fiber, in particular to a technology for coating silicon carbide on the surface of carbon fiber by electrophoresis. Background technique [0002] Carbon fiber has the advantages of light weight, high modulus, high strength, fatigue resistance and acid and alkali resistance. For example, the specific gravity of carbon fiber is 1 / 4 of that of steel, but its strength is 7-8 times that of steel; Fatigue resistance is also significantly better than steel. Therefore, carbon fiber reinforced composite materials have important applications in high-tech fields such as aerospace, construction machinery and sports equipment. In addition, the conductivity of carbon fiber is between metal and non-metal, and it is an important high-temperature structural absorbing material. It has been applied to ...

Claims

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Application Information

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IPC IPC(8): C25D13/02C25D13/16D01F11/12D01F11/16
Inventor 郭向云陈巧梅弓永昌弓永盛
Owner TAIYUAN XIKE NANO TECH
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