A kind of preparation method of carbon fiber composite polyethersulfone resin sample

A technology of polyethersulfone resin and composite polyether, which is applied in the directions of carbon fiber, fiber processing, textile and paper making, etc., can solve the problems of inability to use conventional epoxy sizing agents and high processing temperature, and achieve excellent bonding effect and short molding time. , The effect of improving the interface adhesion performance

Active Publication Date: 2016-04-27
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, the composite polyethersulfone matrix is ​​sulfonated and modified to prepare A new type of carbon fiber sizing agent, sulfonic acid-based polyethersulfone, makes it play the greatest role at the interface of carbon fiber reinforced polyethersulfone composites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1: Prepare sulfonic acid polyethersulfone. Concentrated sulfuric acid is used as sulfonating agent and solvent simultaneously, and the following parts are parts by mass. 100 parts of 98% concentrated sulfuric acid dissolves 20 parts of polyethersulfone resin and carries out sulfonation modification at the same time, introducing sulfonic acid groups into the p-phenylene molecular chain of polyethersulfone. Stir mechanically, the reaction temperature is 30°C, and the reaction time is 6 hours.

[0026] Step 2: Wash with water to remove solvent. Wash the product with a large amount of first-grade distilled water until the pH is 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, dry it, and after repeated tests to determine that it is completely dry, store it in an airtight dry place ; The degree of sulfonation is 4.3%.

[0027] Step 3: Configuration of sulfonated...

Embodiment 2

[0034] Step 1: Prepare sulfonic acid polyethersulfone. Concentrated sulfuric acid is used as sulfonating agent and solvent simultaneously, and the following parts are parts by mass. 200 parts of 98% concentrated sulfuric acid dissolves 16 parts of polyethersulfone resin and performs sulfonation modification at the same time to introduce sulfonic acid groups into the p-phenylene molecular chain of polyethersulfone. Stir mechanically, the reaction temperature is 30°C, and the reaction time is 6 hours.

[0035] Step 2: Wash with water to remove solvent. Wash the product with a large amount of first-grade distilled water until the pH is 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, dry it, and after repeated tests to determine that it is completely dry, store it in an airtight dry place ; The degree of sulfonation is 18.0%.

[0036] Step 3: Same as steps 3-6 in Example ...

Embodiment 3

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

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

[0041] Step 3: Polyacrylonitrile-based carbon fiber sizing. 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 average speed, impregnate the wire at a speed of 10cm / s, dry and close the wire to obtain the sized carbon fiber .

[0042] Step 4: Preparation of sized carbon fiber composite polyethersulfone splines. Weigh 5g of polyethersulfone resin and dissolve it in 17.4ml of solvent, the solvent is a mixture of dimethylacetamide and ethanol, the mass ratio of the two is 1:1. A polyethersulfone resin...

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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 application 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 industry to basic civilian use. Thermoplastic resins are gradually being valued because of their low density, high strength, good toughness, no chemical reaction during the molding process, and reusability. A variety of thermoplastic resins with excellent performance have been researched 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 combina...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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