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Method for preparing nano carbon fiber

A nano carbon fiber, carbon fiber technology, applied in the chemical characteristics of fibers, textiles and papermaking, etc., can solve the problems of inferior fiber quality, and achieve the effects of low equipment cost, simple preparation method and high quality

Inactive Publication Date: 2008-05-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the catalyst adopts an organometallic compound soluble in an organic solvent, and it is made into a solution with a certain concentration, it is input into the reaction furnace, and other reaction gases and dilution gases are passed through, and the product is collected at the gas outlet, so this method The fiber quality obtained is far less good than the matrix method

Method used

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  • Method for preparing nano carbon fiber

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Effect test

Embodiment 1

[0031] Soak the 1K HTA carbon fiber produced by Japan's Toray Company in acetone solution for 4 hours to remove the glue on the surface of the fiber. Dry in the oven for 5 hours at 70°C. A nickel sulfate solution with a concentration of 10% was prepared as the electroplating solution, the current intensity was 15mA, and the wire speed was 40cm / min for nickel electroplating. The nickel-plated carbon fibers were cleaned twice by ultrasonic waves for 2 minutes each, and then dried at 40°C for 5 hours. After taking it out, install it with the workpiece and place it in a chemical vapor deposition furnace for vapor phase growth of carbon nanofibers. Vacuumize the inside of the reaction furnace, and when the pressure is less than 50Pa, start energizing to raise the temperature. The heating time from room temperature to the final reaction temperature of 1000°C is 95 minutes. When the temperature rises to 1000°C, keep it warm for 25 minutes, then start to fill with gas, of which the ...

Embodiment 2

[0033] Soak the 3K T-300 carbon fiber produced by Japan Toray Company in benzene solution for 3 hours to remove the glue on the surface of the fiber. The mass ratio of carbon fiber and organic solution is 1:10, and then use ultrasonic cleaning for 4 times. Dry in a drying oven for 4 hours at 60 °C. A nickel sulfate solution with a concentration of 5% was prepared as the electroplating solution, the current intensity was 10mA, and the wire speed was 20cm / min for nickel electroplating. The nickel-plated carbon fibers were cleaned twice with ultrasonic waves for 1 min. Then, it was dried at 30° C. for 6 hours. After taking it out, install it with the workpiece and place it in a chemical vapor deposition furnace for vapor phase growth of carbon nanofibers. Vacuumize the inside of the reaction furnace, and when the pressure is less than 50Pa, start energizing to raise the temperature. The heating time from room temperature to the final reaction temperature of 800°C is 85 minutes...

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Abstract

The invention discloses a method for preparing carbon nanofiber, which uses carbon fibers as matrix. The surface of the carbon fibers is pretreated and then catalyst nickel coating and simple substance are prepared on the surface by electroplating method; finally the carbon nanofiber is produced on the carbon fibers by chemical vapor deposition method. The invention comprises the steps that: (1) the surface pretreatment of the carbon fibers; (2) the surface electro nickelling of the carbon fibers; (3) the carbon nanofiber produced by chemical vapor deposition method; (4) drawacharge. The invention is a method for preparing the carbon nanofiber with high quality and high purity without damaging the carbon fiber matrix.

Description

technical field [0001] The invention relates to a preparation method of nano carbon fiber. Background technique [0002] Chemical vapor growth nano-carbon fiber is generally a nano-scale carbon fiber produced by gas-phase pyrolysis of low-carbon hydrocarbons and hydrogen in contact with transition metals Fe, Co, Ni and their alloys at high temperature. In addition to the characteristics of ordinary vapor-grown carbon fibers, such as low density, high specific strength, and high electrical conductivity, it also has the advantages of small number of defects, small diameter, large specific surface area, and enhanced hollow tube effect. It can generally be used as catalyst carrier, lithium ion secondary battery, electrode material, hydrogen storage material and reinforcement of advanced composite materials, etc. Carbon nanofibers can also increase the ability to scatter and absorb electromagnetic waves, and the composite materials made of them can have both functions of absorbi...

Claims

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Application Information

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IPC IPC(8): D01F9/12C25D5/54
Inventor 肖鹏许林徐先锋熊翔
Owner CENT SOUTH UNIV
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