Waterborne polyethersulfone sizing agent for carbon fiber and preparation method of waterborne polyethersulfone sizing agent

A water-based, polyethersulfone technology, applied in the direction of carbon fiber, fiber type, fiber treatment, etc., can solve the problems of poor heat resistance and compatibility, and achieve a simple and reliable preparation process, easy to repeat, and good industrialization prospects Effect

Active Publication Date: 2020-01-21
CHANGCHUN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of poor heat resistance and compatibility of existing thermosetting sizing agents in thermoplastic resin systems, and to provide a water-based polyethersulfone sizing agent for carbon fibers and its preparation method

Method used

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  • Waterborne polyethersulfone sizing agent for carbon fiber and preparation method of waterborne polyethersulfone sizing agent
  • Waterborne polyethersulfone sizing agent for carbon fiber and preparation method of waterborne polyethersulfone sizing agent
  • Waterborne polyethersulfone sizing agent for carbon fiber and preparation method of waterborne polyethersulfone sizing agent

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preparation example Construction

[0038] The present invention also provides a method for preparing a water-based polyethersulfone sizing agent for carbon fibers, comprising:

[0039] Step 1: Dissolving the polyethersulfone resin in an organic solvent, fully stirring it to completely dissolve it to form a uniform resin solution; the organic solvent is preferably one of dichloromethane or chloroform;

[0040] Step 2: Add the surfactant into the deionized water, stir at 40-60°C for 30-60 minutes with a high-speed shear emulsification mixer, the speed is preferably 8000-12000 rpm, cool to room temperature, and obtain a solution;

[0041] Step 3: Slowly add the homogeneous resin solution obtained in Step 1 to the solution in Step 2 under high-speed stirring to obtain a mixed solution;

[0042] Step 4: Add the modified nano-carbon material to the mixed solution in Step 3, and add leveling agent, lubricant, adhesive and antistatic agent at the same time, and stir at a high speed for 30-60 minutes at a constant shear...

Embodiment 1

[0048] (1) Preparation of modified GO: First, add 0.1 g of GO and 2 g of 3,3'-diaminodiphenylsulfone to 100 mL of DMF, then add 5 g of dehydrating agent dicyclohexylcarbodiimide and 0.8 g of The catalyst 4-dimethylaminopyridine was stirred continuously at 40°C for 24 hours to react the amino functional group in the amino compound with the carboxyl functional group in GO. Then the reacted mixture was centrifuged three times, and washed with DMF to remove unreacted dicyclohexylcarbodiimide and 4-dimethylaminopyridine. Finally, the 3,3'-diaminodiphenylsulfone chemically grafted GO was obtained by vacuum drying at 80 °C.

[0049] (2) Dissolve 1 g of polyethersulfone resin in dichloromethane, stir well to completely dissolve it, and form a uniform solution.

[0050] (3) Add 0.5 g of sodium lauryl sulfate into 97.6 mL of deionized water, stir at 40° C. for 30 min with a high-speed shear emulsifying mixer, and cool to room temperature.

[0051] (4) The homogeneous resin solution ob...

Embodiment 2

[0060] (1) The nano-carbon material used in this example is carboxylated CNT, and the modifier, modification method and consumption are the same as in Example 1.

[0061] (2) Dissolve 2 g of polyethersulfone resin in dichloromethane, stir well to completely dissolve it, and form a uniform solution.

[0062] (3) Add 0.2 g of Tween-80 and 0.5 g of sodium lauryl sulfate into 96.3 mL of deionized water, stir at 50° C. for 30 min with a high-speed shear emulsifying mixer, and cool to room temperature.

[0063] (4) under water bath conditions, the uniform resin solution obtained in step (2) is slowly added dropwise to the solution in step (3) under high-speed stirring to obtain a mixed solution;

[0064] (5) In the mixed solution of step (4), add the CNT of 0.1g modification, add simultaneously 0.1g acrylic resin, 0.3g butyl stearate, 0.3g carboxymethyl cellulose and 0.2g polyether ester amide, Stir at high speed for 30 min at a constant shear rate.

[0065] (6) Stir the solution ...

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Abstract

The invention provides a waterborne polyethersulfone sizing agent for carbon fiber and a preparation method of the waterborne polyethersulfone sizing agent and belongs to the technical field of the sizing agents. The sizing agent comprises, by weight, 0.5-3 parts of polyethersulfone resin, 0.1-1 part of modified nano-carbon material, 0.2-2 parts of surfactant, 0.1-0.5 part of flatting agents, 0.1-0.7 part of lubricant, 0.1-1 part of bonding agents, 0.2-0.8 part of antistatic agent, and 91-98.7 parts of deionized water, wherein the modified nano-carbon material refers to modified graphene oxideor modified carbon nano-tubes. The invention further provides a preparation method of the waterborne polyethersulfone sizing agent for carbon fiber. As the modified nano-carbon has the structure similar to resin structure, amino functional groups can form hydrogen bonding with ether bond and sulfone bond of polyethersulfone resin, and further, good compatibility and excellent interface bonding strength between the sizing agent and the resin are guaranteed, and interfacial properties of carbon fiber reinforced polyethersulfone composites are improved remarkably.

Description

technical field [0001] The invention belongs to the technical field of sizing agents, and in particular relates to a water-based polyethersulfone sizing agent for carbon fibers and a preparation method thereof. Background technique [0002] As a high-performance fiber, carbon fiber has a series of advantages such as high specific strength, high specific modulus, fatigue resistance and low thermal expansion coefficient. It has been widely used in aerospace, national defense and military industries. However, carbon fibers have fewer surface active functional groups after high-temperature carbonization. Untreated carbon fibers have low surface energy, are chemically inert, and have poor wettability with resins, resulting in weak interfacial bonding of composites. In addition, carbon fiber also has the characteristics of low elongation at break and high brittleness. During the manufacturing process, after the fiber is rubbed, it is prone to fluff and fracture, resulting in a de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/63D06M11/74D06M15/263D06M13/224D06M15/09D06M15/59D06M101/40
CPCD06M15/63D06M11/74D06M15/263D06M13/224D06M15/09D06M15/59D06M2101/40D06M2200/40
Inventor 刘浏敖玉辉庄海林尚垒鄢飞杜巍峰李峥
Owner CHANGCHUN UNIV OF TECH
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