Preparation method of sizing agent for self-emulsifying waterborne epoxy resin carbon fiber

A water-based epoxy resin and epoxy resin technology, applied in the direction of carbon fiber, fiber treatment, fiber type, etc., can solve the problems of unsatisfactory heat and humidity resistance, low mechanical tensile strength, environmental pollution, etc., to make up for brittle defects, Good protective effect, high solid content effect

Active Publication Date: 2016-08-31
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a self-emulsifying water-based epoxy resin carbon fiber prepared by the existing method in order to solve the technical problems that the mechanical properties of the product obtained by the existing method need to be improved, the mechanical tensile strength is not high, the environment is polluted, and the resistance to heat and humidity is not ideal. The sizing agent has small particle size and narrow distribution, good stability, moderate viscosity, good carbon fiber clustering after sizing, low hairiness, high wear resistance, good protection for the carbon fiber surface, and can be used as a reinforcement for the subsequent carbon fiber The application of self-emulsifying epoxy resin carbon fiber has a good promotion effect. Preparation method of sizing agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of preparation method of sizing agent for self-emulsifying water-based epoxy resin carbon fiber, it comprises the steps:

[0030] Synthesis of epoxy-functional surfactants:

[0031] In a 250ml four-neck flask equipped with a stirrer, a reflux condenser, a dropping funnel, and a thermometer, add 65g of bisphenol A polyoxyethylene ether and 0.3% of the total mass of the catalyst (organotin) to mix, and pre-heat at 50°C. Heat and stir to dissolve, then add 5g of epichlorohydrin dropwise with a constant pressure dropping funnel for 0.5h, then react for 2h, cool down to 40°C, add dropwise a prepared 40% sodium hydroxide aqueous solution, The dropping time is 1 hour. After the titration is completed, react for another 1.5 hours. Finally, add 20 g of toluene and distill under reduced pressure to obtain a bisphenol A polyoxyethylene glycidyl ether intermediate with an epoxy group.

[0032] Synthesis of Self-Emulsifying Waterborne Epoxy Polymers Containing Surfactant Fun...

Embodiment 2

[0046] A kind of preparation method of sizing agent for self-emulsifying water-based epoxy resin carbon fiber, it comprises the steps:

[0047] Synthesis of epoxy-functional surfactants:

[0048] In a 250ml four-necked flask equipped with a stirrer, a reflux condenser, a dropping funnel, and a thermometer, add 70g of bisphenol A polyoxyethylene ether, and the mass of the catalyst (organotin) is 0.45% of the total mass. Heat and stir to make it dissolve, then add 8g of epichlorohydrin dropwise with a constant pressure dropping funnel for 1h, then react for 2.5h, cool down to 45°C, add dropwise a prepared 30% sodium hydroxide aqueous solution, The dropping time is 0.5h. After the titration is completed, react for another 2h. Finally, add 25g of toluene and distill under reduced pressure to obtain the intermediate of bisphenol A polyoxyethylene glycidyl ether with epoxy groups.

[0049] Synthesis of Self-Emulsifying Waterborne Epoxy Polymers Containing Surfactant Functional Grou...

Embodiment 3

[0063] A kind of preparation method of sizing agent for self-emulsifying waterborne epoxy resin carbon fiber, it comprises the steps:

[0064] Synthesis of epoxy-functional surfactants:

[0065] In a 250ml four-necked flask equipped with a stirrer, a reflux condenser, a dropping funnel, and a thermometer, add 72g of castor oil polyoxyethylene ether, and the mass of the catalyst (triethylamine) is 0.5% of the total mass, mix, and pre-heat at 58°C. Heat and stir to make it dissolve, then add 8g of epichlorohydrin dropwise with a constant pressure dropping funnel, the dropwise addition time is 1h, and then react for 2h, cool down to 45°C, dropwise add the prepared 40% sodium hydroxide aqueous solution, dropwise The addition time is 1 hour, after the titration is completed, react for another 2 hours, finally add 25 g of toluene, and distill under reduced pressure to obtain the castor oil polyoxyethylene glycidyl ether intermediate with epoxy groups.

[0066] Synthesis of Self-Emu...

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Abstract

The invention relates to a preparation method of a sizing agent for self-emulsifying waterborne epoxy resin carbon fiber and solves the technical problems that products prepared by existing methods have room for improvement in mechanical performance, are low in mechanical tensile strength, cause environment pollution and are ideal in resistance to dampness and heat. The preparation method includes following steps: synthesizing a surfactant containing epoxy functional group; synthesizing self-emulsifying waterborne epoxy resin polymer containing surfactant functional group; emulsifying the self-emulsifying waterborne epoxy resin polymer containing the surfactant functional group. The preparation method is widely used in the field of preparing the sizing agent for carbon fiber.

Description

technical field [0001] The invention relates to the field of materials, in particular to a preparation method of a self-emulsifying waterborne epoxy resin carbon fiber sizing agent. Background technique [0002] As a technology-intensive key material, carbon fiber has gradually become an important strategic material for the development of national defense industry and national economy. Because of its high strength, high modulus and high temperature resistance, it is widely used in aerospace, aviation, automobiles, electronics, machinery, Textile and other civil industries to sports equipment and leisure products and other fields. However, the elongation of carbon fiber is low and brittle, and it is easy to cause monofilament breakage and wool during processing. In the preparation of fiber-reinforced composites, hairs will hinder the infiltration of matrix resin to carbon fibers. Therefore, to avoid these defects, carbon fibers require sizing. [0003] Traditional sizing a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/55C08G59/14D06M101/40
CPCC08G59/14D06M15/55D06M2101/40D06M2200/40
Inventor 李鹏臧圣彪张云平杨小平
Owner BEIJING UNIV OF CHEM TECH
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