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Method for in-situ growing carbon nanotubes on fiber surfaces

A technology for in-situ growth of carbon nanotubes, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, and can solve the problems of unfavorable large-scale preparation of micro-nano composite fibers and uneven growth of carbon nanotubes

Active Publication Date: 2011-09-28
BEIHANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, this process is not conducive to the large-scale preparation of micro-nano composite fibers. At the same time, it is difficult to uniformly disperse the catalyst particles to any position of the fiber due to the deposition or evaporation of catalyst particles, resulting in uneven growth of carbon nanotubes on the fiber surface.

Method used

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  • Method for in-situ growing carbon nanotubes on fiber surfaces
  • Method for in-situ growing carbon nanotubes on fiber surfaces
  • Method for in-situ growing carbon nanotubes on fiber surfaces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Cut the carbon fiber fabric to 2cm×2cm and place it in the middle of the reaction furnace. Preparation of reaction solution: 1.75g ​​of ferrocene was dissolved in 15g of toluene solution, and 0.875g of thiophene was added dropwise. Then the mixed solution was ultrasonically dispersed for 5 min.

[0020] (2) Raise the temperature of the horizontal reactor to 700°C at a rate of 10°C / min, inject the reaction solution into a gas flow of 50ml / min argon as a carrier gas at a rate of 10ml / h, and react at a high temperature of 700°C In a furnace, carbon nanotubes grow directly on the surface of carbon fiber fabrics.

[0021] (3) figure 2 It is a scanning electron microscope picture of the micro-nano composite carbon fiber obtained in Example 1 of the present invention. (A) Carbon fiber fabric coated with carbon nanotubes, and the carbon nanotubes are uniformly dispersed; (B) Carbon nanotubes grown on the surface of carbon fibers.

Embodiment 2

[0023] (1) Cut the glass fiber fabric to 2cm×2cm and place it in the middle of the reaction furnace. Prepare the reaction solution: weigh 0.65g of ferrocene, dissolve it in 11.7g of xylene solution, and add 0.65g of thiophene dropwise. Then the mixed solution was ultrasonically dispersed for 5 min.

[0024] (2) Raise the temperature of the horizontal reaction furnace to 800°C at a rate of 10°C / min, inject the reaction liquid into the airflow of 50ml / min hydrogen as the carrier gas at a rate of 10ml / h, In , carbon nanotubes grow directly on the surface of glass fiber fabrics.

[0025] (3) image 3 It is a scanning electron microscope picture of the micro-nano composite glass fiber obtained in Example 2 of the present invention. (A) Glass fiber fabric coated with carbon nanotubes; (B) CNT layer grown on the glass fiber surface.

Embodiment 3

[0027] (1) Cut the silicon carbide fiber fabric to 2cm×2cm and place it in the middle of the reaction furnace. Prepare the reaction solution: weigh 0.14g of ferrocene, dissolve it in 13.3g of acetone solution, and add 0.56g of thiophene dropwise. Then the mixed solution was ultrasonically dispersed for 5 min.

[0028] (2) Raise the temperature of the horizontal reaction furnace to 900°C at a rate of 10°C / min, inject the reaction solution into the airflow of 100ml / min hydrogen as the carrier gas at a rate of 5ml / h, and heat the reactor at a high temperature of 900°C In , carbon nanotubes grow directly on the surface of silicon carbide fiber fabrics.

[0029] (3) Figure 4 Scanning electron micrograph of the micro-nano composite silicon carbide fiber obtained in Example 3 of the present invention, (A) a silicon carbide fiber fabric covered by carbon nanotubes; (B) a carbon nanotube layer grown on the surface of the silicon carbide fiber

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Abstract

The method provides a method for in-situ growing carbon nanotubes on fiber surfaces, namely a method for directly growing carbon nanotubes on surfaces of fibers (carbon fibers, glass fibers, silicon carbide fibers, alumina fibers, high silica fibers, mullite fibers and the like). In the method, normal hexane, hexane, benzene, toluene, dimethylbenzene, ethanol or acetone is used as a carbon source, ferrocene is used as a catalyst, a sulfur compound such as sulfur, thiophene and the like are used as an accelerator, and hydrogen, argon, nitrogen, helium or the mixture of hydrogen, inert gas and the like is used as carrier gas, a horizontal reacting furnace device is used to direct grow the carbon nanotubes on the fiber surfaces under the conditions that the temperature ranges from 600 DEG C to 1000 DEG C and the carrier gas flow velocity is 10-2000ml / min. The method has the following advantage: the carbon nanotubes are directly grown on the fiber surfaces without depositing catalyst particles on the fiber surfaces in advance, which is beneficial to the large-scale growth of the carbon nanotubes on the surfaces of the fiber fabrics.

Description

technical field [0001] The invention relates to a production process for directly growing carbon nanotubes on the fiber surface, and belongs to the field of micro-nano composite fiber preparation. Background technique [0002] Carbon nanotubes (Carbon Nanotube, CNT) have ultra-high mechanical, electrical and thermal properties due to their unique geometric structure and electronic band structure. The tensile strength of the multi-walled carbon nanotubes is measured to be over 100GPa, the Young's modulus is over 1.0TPa, and the maximum elongation can reach 10-12%. In addition, the conductivity of carbon nanotubes is as high as 10 5 Scm -1 , 1000 times that of carbon fiber. The thermal conductivity of carbon nanotubes is as high as 3000Wm -1 K -1 , making it an excellent thermal conductor. The thermal stability of carbon nanotubes in air (basically not oxidized below 500°C in air) makes it an excellent flame retardant (Flame Retardant) material. [0003] In recent years...

Claims

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Application Information

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IPC IPC(8): D06M11/74C01B31/02C03C25/00C04B41/85D06M101/40
Inventor 程群峰江雷仝建峰益小苏
Owner BEIHANG UNIV
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