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Surface modification method of carbon fibre plasma grafted carbon nano-tube

A technology of plasma and carbon nanotubes, which is applied in carbon fiber, fiber treatment, textiles and papermaking, etc., can solve the problems of limited polar groups and achieve the effects of improving wettability, reducing the amount of chemicals used, and low equipment investment costs

Inactive Publication Date: 2013-09-25
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon nanotubes are a material with high strength and high modulus, excellent electrical conductivity and thermal conductivity. The existing technology of grafting carbon nanotubes on the surface of carbon fibers is mainly to graft aminated carbon nanotubes after acidification of carbon fibers. Although these methods can basically To meet the modification needs of carbon fiber surface properties, but the polar groups introduced on the fiber surface after acidification of carbon fibers are limited, and cannot be well grafted and aminated carbon nanotubes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment adopts the following steps:

[0025] Step 1: Place the carbon fiber material on the oxygen plasma device, and spray oxygen plasma onto the surface of the carbon fiber in an open environment, so that the surface of the carbon fiber material is in contact with the oxygen plasma, so that the carbon fiber moves in the oxygen plasma atmosphere, where the plasma The power of the body generating device is 100W, the processing time is 900s, and the surface of the carbon fiber material is modified; then the carbon fiber material after the plasma treatment is vacuum-dried at 60°C to a constant weight;

[0026] Step 2: adding the aminated carbon nanotubes into the acetone solution, and ultrasonically treating for 10 minutes to obtain an aminated carbon nanotube acetone sol with a carbon nanotube concentration of 0.05 g / L;

[0027] Step 3: Add the carbon fiber material treated in step 1 to the aminated carbon nanotube acetone sol solution obtained in step 2, and add...

Embodiment 2

[0030] Step 1: Place the carbon fiber material on the He plasma device, and spray He plasma onto the surface of the carbon fiber in an open environment, so that the surface of the carbon fiber material is in contact with the He plasma, so that the carbon fiber moves in the He plasma atmosphere, and the plasma The power of the body generating device is 500W, the processing time is 400s, and the surface of the carbon fiber material is modified; then the carbon fiber material after the plasma treatment is vacuum-dried at 50°C to a constant weight;

[0031] Step 2: adding the aminated carbon nanotubes into the carbon tetrachloride solution, and ultrasonically treating for 30 minutes to obtain aminated carbon nanotubes carbon tetrachloride sol with a carbon nanotube concentration of 2 g / L;

[0032] Step 3: Add the carbon fiber material treated in step 1 to the aminated carbon nanotube carbon tetrachloride sol solution obtained in step 2, and add 1-ethyl-3-dimethylaminopropylcarbodii...

Embodiment 3

[0035] Step 1: Place carbon fiber material in NH 3 Plasma device, and NH in an open environment 3Plasma is sprayed onto the surface of carbon fiber, so that the surface of carbon fiber material is in contact with NH 3 plasma to make carbon fiber in NH 3 Movement in a plasma atmosphere, in which the power of the plasma generating device is 1000W, and the processing time is 10s, and the surface of the carbon fiber material is modified; then the carbon fiber material after the plasma treatment is vacuum-dried at 60°C to a constant weight;

[0036] Step 2: adding the aminated carbon nanotubes into the acetic acid solution, and ultrasonically treating for 50 minutes to obtain an aminated carbon nanotube acetic acid sol with a carbon nanotube concentration of 10 g / L;

[0037] Step 3: Add the carbon fiber material treated in step 1 to the aminated carbon nanotube acetic acid sol solution obtained in step 2, and add N,N-diisopropylcarbodiimide as a surfactant for mixing, wherein the...

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Abstract

The invention provides a surface modification method of a carbon fibre plasma grafted carbon nano-tube, and the method comprises the following steps of: putting a carbon fibre material in the plasma atmosphere, wherein the power of a plasma generation device is 100-1000 W, and the processing time is 10-900 s; drying the processed carbon fibre material in vacuum at 40-60 DEG C to constant weight; then, adding amination carbon nano-tube into organic solution, and ultrasonically processing for 10-50 min to obtain sol solution with the concentration of 0.01-10 g / L; finally, adding the carbon fibre material into the carbon nano-tube sol solution, adding a surface active agent to mix, wherein the mass ratio of the surface active agent to the amination carbon nano-tube is 1:1, ultrasonically processing the obtained mixed solution for 10-50 minutes, increasing the temperature to 50-100 DEG C, carrying out constant-temperature reaction for 9-12 hours, and washing and drying. According to the invention, the carbon nano-tube is used as the surface grafting material of carbon fibre; the surface of carbon fibre is modified through plasma; a lot of polar groups are introduced into the surface of fibre, therefore, carbon fibre is grafted with the amination carbon nano-tube well; then, the carbon nano-tube well is grafted.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber surface modification, in particular to a method for surface modification of carbon fiber plasma grafted carbon nanotubes. Background technique [0002] Carbon fiber refers to a fiber material that has been carbonized at a high temperature and contains more than 85% carbon, including carbon fiber and graphite fiber. Carbon fiber is a fiber with a carbon content of 85% to 95% after the organic fiber is treated at 1000-2300°C; graphite fiber is a fiber with a carbon content of more than 98% after the organic fiber is treated at a temperature above 2300°C. As a high-performance fiber, carbon fiber has become the most important reinforcing material for resin-based composite materials in recent years because of its high specific strength, high specific modulus, small thermal expansion coefficient, low friction coefficient, and good low temperature resistance. In aerospace components and sporting g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M10/00D06M11/74D06M13/322C08J5/06C08K9/04C08K9/02C08K7/06D06M101/40
Inventor 邓超蒋建军方良超史景文王俊彪
Owner NORTHWESTERN POLYTECHNICAL UNIV
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