Preparation method and using method of carbon fiber compounded polyether sulfone resin sizing agent

A technology of polyethersulfone resin and composite polyether, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc. It can solve the problems of high processing temperature and the inability to use conventional epoxy sizing agents, etc., and achieves short molding time and excellent combination effect, effect with obvious advantages

Active Publication Date: 2014-09-03
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved in the present invention is that for carbon fiber composite polyethersulfone resin, due to the high processing temperature, conventional epoxy sizing agents cannot be used. According to the principle of similar compatibility, t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1:

[0025] Step 1: Preparation of sulfonic acid-based polyethersulfone. Concentrated sulfuric acid is used as both sulfonating agent and solvent, and the following parts are parts by mass. 100 parts of 98% concentrated sulfuric acid dissolves 20 parts of polyethersulfone resin and simultaneously undergoes sulfonation modification, and sulfonic acid groups are introduced into the p-phenylene molecular chain of polyethersulfone. With mechanical stirring, the reaction temperature was 30°C, and the reaction time was 6 hours.

[0026] Step 2: Wash off the solvent with water. Wash the product with a large amount of first-grade distilled water to a pH of 6-8 to ensure that there is no sulfuric acid residue, otherwise it will affect the determination of the degree of sulfonation; when the pH value is stable, perform a drying treatment, and after several tests confirm that it is completely dry, store it in an airtight dry place ; The degree of sulfonation is 4.3%.

[0027]...

Example Embodiment

[0033] Example 2:

[0034] Step 1: Preparation of sulfonic acid-based polyethersulfone. Concentrated sulfuric acid is used as both sulfonating agent and solvent, and the following parts are parts by mass. 200 parts of 98% concentrated sulfuric acid dissolves 16 parts of polyethersulfone resin and simultaneously undergoes sulfonation modification, and sulfonic acid groups are introduced into the p-phenylene molecular chain of polyethersulfone. With mechanical stirring, the reaction temperature was 30°C, and the reaction time was 6 hours.

[0035] Step 2: Wash off the solvent with water. Wash the product with a large amount of first-grade distilled water to a pH of 6-8 to ensure that there is no sulfuric acid residue, otherwise it will affect the determination of the degree of sulfonation; when the pH value is stable, perform a drying treatment, and after several tests confirm that it is completely dry, store it in an airtight and dry place ; The degree of sulfonation is 18.0%.

[...

Example Embodiment

[0038] Example 3:

[0039] Step 1: Same as steps 1-2 in Example 1.

[0040] Step 2: Configuration of sulfonated polyethersulfone sizing agent. 0.1723 g of sulfonic polyethersulfone was dissolved in 200 ml of solvent, where the solvent was a mixed solution of dimethylacetamide and ethanol, and the mass ratio of the two was 1:1. The sulfonic acid-based polyethersulfone sizing agent is obtained.

[0041] Step 3: Sizing the polyacrylonitrile-based carbon fiber. Pour the sulfonic acid-based polyethersulfone sizing agent sample obtained in step 2 into the sizing tank, pass the carbon fiber through the sizing tank at an even speed, and immerse the filament at a speed of 10 cm / s, dry and take the filament to obtain the sizing carbon fiber .

[0042] Step 4: Preparation of sizing carbon fiber composite polyethersulfone spline. Weigh 5g of polyethersulfone resin and dissolve it in 17.4ml of solvent. The solvent is a mixture of dimethylacetamide and ethanol, with a mass ratio of 1:1. The po...

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Abstract

The invention provides a preparation method and a using method of a carbon fiber compounded polyether sulfone resin sizing agent. A new carbon fiber sizing agent component for polyether sulfone resin is prepared for solving the problem that an epoxy sizing agent is not suitable for the carbon fiber compounded polyether sulfone material, and can effectively improve the interface bonding property of carbon fibers and polyether sulfone and improve the high temperature resistance of a composite material. A preparation method comprises the steps of processing polyether sulfone resin with a sulfonating agent to obtain a main component (sulfonic polyether sulfone) of the sizing agent; preparing a sizing solution and dipping the carbon fiber to obtain the sizing carbon fiber. The method can improve the interface bonding property of the carbon fiber compounded polyether sulfone resin and can fully achieve high specific strength of the carbon fiber and high temperature resistance of the polyether sulfone.

Description

Technical field [0001] The invention relates to the preparation and use method of a carbon fiber sizing agent suitable for a thermoplastic polyethersulfone resin matrix. Background technique [0002] The multiple characteristics of carbon fiber, such as high strength, high modulus, corrosion resistance, and high temperature resistance, determine its wide range of applications. Carbon fiber composite resin is used in national defense science and engineering to basic civilian use. Thermoplastic resins are gradually being valued due to their low density, high strength, good toughness, no chemical reaction in the molding process, and reusability. A variety of excellent thermoplastic resins have been developed to replace thermosetting resins in various fields. The demand is increasing year by year. [0003] The characteristics of carbon fiber surface inertness, small active specific surface area, and low surface energy seriously affect the bonding of the two-phase interface. When subj...

Claims

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Application Information

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IPC IPC(8): D06M15/63C08G75/23D06M101/40
Inventor 刘杰周秀燕梁节英
Owner BEIJING UNIV OF CHEM TECH
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