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
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Embodiment 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] Step 3: Configurat...
Embodiment 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%.
[0036] Step 3: Same ...
Embodiment 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 polyethersulfone resi...
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