A self-emulsifying epoxy resin sizing agent with a macromolecular emulsifier for carbon fibers

A macromolecular emulsifier, epoxy resin technology, used in carbon fiber, fiber processing, textiles and papermaking, etc., can solve the problems of poor storage stability, high fiber stiffness, affecting fiber post-processing performance, etc., to achieve low cost, interface Good adhesion and excellent emulsion stability

Inactive Publication Date: 2016-08-10
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many sizing agents use the external emulsification method, that is, the epoxy resin is dispersed in water by adding various small molecule emulsifiers. Due to the structural differences between small molecule emulsifiers and epoxy resins, their storage stability is poor.
On the other hand, the rigid chain structure of bisphenol A epoxy resin in commonly used sizing agents makes a hard film layer on the surface of the fiber, resulting in high stiffness of the fiber and affecting the post-processing performance of the fiber.

Method used

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  • A self-emulsifying epoxy resin sizing agent with a macromolecular emulsifier for carbon fibers
  • A self-emulsifying epoxy resin sizing agent with a macromolecular emulsifier for carbon fibers
  • A self-emulsifying epoxy resin sizing agent with a macromolecular emulsifier for carbon fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of emulsifier: (1) Add the ethanol solution of ethanolamine into a three-necked flask equipped with a condensing reflux device, and raise the temperature to 70°C. Add the ethanol solution of AEPH dropwise into the three-necked flask, stir at constant temperature, and react for 3 hours to obtain the AEPH-ethanolamine adduct AEPH-MEA. (2) Add E-51 into the three-necked flask, and continue to stir and react at 70°C for 3 hours to prepare AEPH, ethanolamine, and epoxy resin adduct AEPH-MEA-DGEBA. (3) Take glacial acetic acid with an amount of 80% ethanolamine, dilute it to a concentration of 60% with deionized water, and add it dropwise at 60°C to neutralize the product into a salt; after the addition is completed, stir at constant temperature for 30 minutes, and distill under reduced pressure The solvent is removed to obtain a macromolecular emulsifier. In the above reaction process, the mass ratio of ethanolamine to ethanol is 50:50; the mass ratio of AEPH to...

Embodiment 2

[0058] Preparation of emulsifier: (1) Add the ethanol solution of ethanolamine into a three-necked flask equipped with a condensing reflux device, and raise the temperature to 80°C. Add the ethanol solution of AEPH dropwise into the three-necked flask, stir at constant temperature, and react for 3 hours to obtain the AEPH-ethanolamine adduct AEPH-MEA. (2) Add ring E-51 into the three-necked flask, and continue to stir and react at 60°C for 3 hours to prepare AEPH, ethanolamine, and epoxy resin adduct AEPH-MEA-DGEBA. (3) Take glacial acetic acid with an amount of 90% ethanolamine, dilute it to a concentration of 60% with deionized water, and add it dropwise at 60°C to neutralize the product to form a salt; after the addition is completed, stir at constant temperature for 30 minutes, and distill under reduced pressure The solvent is removed to obtain a macromolecular emulsifier. In the above-mentioned reaction process, the mass ratio of ethanolamine and ethanol is 30:70; The ma...

Embodiment 3

[0062] Preparation of emulsifier: (1) Add the ethanol solution of ethanolamine into a three-necked flask equipped with a condensing reflux device, and raise the temperature to 80°C. Add the ethanol solution of AEPH dropwise into the three-necked flask, stir at constant temperature, and react for 3 hours to obtain the AEPH-ethanolamine adduct AEPH-MEA. (2) Add E-51 into the three-necked flask, and continue to stir and react at 80°C for 3 hours to prepare AEPH, ethanolamine, and epoxy resin adduct AEPH-MEA-DGEBA. (3) Take glacial acetic acid with 100% ethanolamine content, dilute it to a concentration of 60% with deionized water, and add it dropwise at 60°C to neutralize the product to form a salt; after the addition is completed, stir at constant temperature for 30 minutes, and distill under reduced pressure The solvent is removed to obtain a macromolecular emulsifier. In the above reaction process, the mass ratio of ethanolamine to ethanol is 40:60; the mass ratio of AEPH to ...

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Abstract

The invention discloses a macromolecular emulsifier self-emulsifying epoxy resin sizing agent for carbon fibers. The components include main slurry, macromolecular emulsifier, diluent and deionized water. The mass ratio of macromolecular emulsifier to main slurry is 10~40:60~90, the mass ratio of diluent to main slurry is 10~30:70~90, and the mass ratio of deionized water to main slurry is 50 ~90:10~50. The main slurry is a glycidyl ether type epoxy resin, and the macromolecular emulsifier is obtained by hydrophilically modifying the glycidyl ether type epoxy resin with ethanolamine, allyl polyoxyethylene polyoxypropylene epoxy ether and glacial acetic acid. The invention also discloses a preparation method and an application method of the sizing agent. The preparation method of the sizing agent is simple and easy to implement, and the flexible macromolecular emulsifier can improve the brittleness of the composite material interface. The sizing agent is used for carbon fiber and can improve the processing performance of the fiber and the mechanical properties of the carbon fiber reinforced resin matrix composite material.

Description

technical field [0001] The invention relates to a carbon fiber sizing agent and its preparation method and application, in particular to a carbon fiber macromolecular emulsifier self-emulsifying epoxy resin sizing agent and its preparation method and application. Background technique [0002] Carbon fiber has high strength, high modulus, high temperature resistance and other properties, and is widely used in various fields. However, carbon fibers have low elongation and are brittle, and they are subject to repeated bending and friction during processing, which can easily cause monofilament breakage and wool. When preparing carbon fiber-reinforced composites, the hairs of carbon fibers will hinder the wetting of the matrix resin to the carbon fibers, resulting in poor mechanical properties of the obtained composites. To solve this problem, carbon fiber needs to be sized. Sizing is to coat a layer of protective glue on the surface of carbon fiber. The ideal carbon fiber sizi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/55C08G59/14D06M101/40
Inventor 葛曷一陈娟李顺柳华实王冬至马小龙
Owner UNIV OF JINAN
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