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Carbon fiber coating layer modifying treatment method

A treatment method and carbon fiber technology, which is applied in fiber treatment, carbon fiber, textiles and papermaking, etc., can solve problems such as increased roughness and carbon fiber surface damage, and achieve the effects of preventing material damage, relieving stress concentration, and improving mechanical properties

Inactive Publication Date: 2016-12-21
郑州峰泰纳米材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the problem that the existing single method modification causes damage to the carbon fiber surface, the present invention proposes a carbon fiber coating modification treatment method. The transfer effect between the matrix and the interface can effectively relieve stress concentration, prevent material damage, and improve the mechanical properties of composite materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A carbon fiber coating modification treatment method, comprising the steps of:

[0027] 1) Preparation of titanium dioxide sol: adding tetrabutyl titanate into ethanol solution, then slowly adding alcohol solution of hydrochloric acid dropwise, and continuing to stir for 0.5 h after the dropwise addition, to obtain titanium dioxide sol.

[0028] 2) Immerse 6g of acrylonitrile carbon fiber in an organic solvent solution grafted with 10wt% maleic anhydride and heat it to 50°C for 5h, then dry it to obtain CF-1.

[0029] 3) Under ultrasonic conditions of 100°C, add CF-1 into 150ml of potassium permanganate sulfuric acid solution for oxidation etching treatment, after the treatment, naturally cool down to room temperature and wash with water until the pH is 6, and dry to obtain CF-2: The sulfuric acid solution of potassium permanganate is a solution prepared by adding 0.4 g of potassium permanganate to 50 ml of sulfuric acid with a molar concentration of 0.5 mol / L.

[0030...

Embodiment 2

[0033] A carbon fiber coating modification treatment method, comprising the steps of:

[0034] 1) Titanium dioxide sol preparation: adding tetrabutyl titanate to ethanol solution, then slowly adding hydrochloric acid alcohol solution dropwise, and continuing to stir for 0.8 h after the dropwise addition, to obtain titanium dioxide sol.

[0035] 2) Immerse 5g of high-performance pitch-based carbon fiber in acetone solution of 12wt% styrene-acrylonitrile-glycidyl methacrylate, heat it to 60°C for 2 hours, and dry it to obtain CF-1.

[0036] 3) Under ultrasonic conditions at 120°C, add CF-1 into the sulfuric acid solution of potassium permanganate for oxidation and etching treatment. After the treatment, naturally cool down to room temperature and wash with water until the pH is 8, then dry to obtain CF -2; The sulfuric acid solution of potassium permanganate refers to a solution prepared by adding 0.6 g of potassium permanganate to 55 ml of sulfuric acid with a molar concentrati...

Embodiment 3

[0040] A carbon fiber coating modification treatment method, comprising the steps of:

[0041] 1) Preparation of titanium dioxide sol: adding tetrabutyl titanate to ethanol solution, then slowly adding alcohol solution of hydrochloric acid dropwise, and continuing to stir for 1 hour after the dropwise addition, to obtain titanium dioxide sol.

[0042] 2) Dip 8g of acrylonitrile carbon fiber in 15wt% maleic anhydride-grafted ethanol solution and heat to 60°C for 2h, then dry to obtain CF-1.

[0043] 3) Under ultrasonic conditions of 150°C, add CF-1 into the sulfuric acid solution of potassium permanganate for oxidation etching treatment. After the treatment, naturally cool down to room temperature and wash with water until the pH is 7, and dry to obtain CF -2. The sulfuric acid solution of potassium permanganate refers to a solution prepared by adding 0.8 g of potassium permanganate to 60 ml of sulfuric acid with a molar concentration of 0.9 mol / L.

[0044] 4) Disperse CF-2 i...

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PUM

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Abstract

The invention provides a carbon fiber coating layer modifying treatment method. The method comprises the following steps: preparing titanium dioxide sol, impregnating carbon fibers in a compatilizer solution, carrying out oxidizing etching treatment on CF-1 by using a sulfuric acid solution of potassium permanganate under an ultrasonic condition, naturally cooling the above obtained material to room temperature, washing the cooled material with water until the pH value is 6-8, drying the washed material to obtain CF-2, reducing the CF-2 in ether by using lithium borohydride, and impregnating obtained reduced CF-3 in the titanium dioxide sol to obtain CF-4. The method improves the surface wettability of the fibers, obviously increases the surface roughness, is in favor of increasing the transmission effect between a matrix and an interface in a composite material, and can effectively alleviate stress concentration and prevent the material from being destroyed in order to improve the mechanical performances of the composite material.

Description

technical field [0001] The invention belongs to the technical field of carbon fibers, and in particular relates to a carbon fiber coating modification treatment method. Background technique [0002] Carbon fiber is a new generation of reinforcing fiber with the two characteristics of high tensile strength of carbon material and soft processability of fiber. It has both the electrical conductivity and thermal conductivity of metal materials, and the heat resistance and chemical resistance of ceramic materials. There are many advantages such as flexibility, softness and weaving of textile fibers. Its specific gravity is only 1 / 4 of steel, but its tensile strength can reach 7 to 9 times that of steel. Therefore, it has been widely used in many fields such as aerospace, automobile manufacturing, sports and leisure, and high-performance carbon fiber has become a new technology at home and abroad. Emphasis and hotspots of research in the field of materials. [0003] Carbon fiber...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/46D06M15/31D06M15/263D06M11/50D06M11/55D06M11/80D06M11/13C08K9/02C08K9/04C08K7/06D06M101/40
CPCD06M11/46C08K7/06C08K9/02C08K9/04D06M11/13D06M11/50D06M11/55D06M11/80D06M15/263D06M15/31D06M2101/40
Inventor 李洋洋
Owner 郑州峰泰纳米材料有限公司
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