Thermoplastic epoxy resin and application thereof, and surface modifier for carbon fibers

A technology of surface modifier and epoxy resin, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc., can solve the problems of complex process, increased cost, and large damage to the mechanical properties of carbon fibers, so as to achieve good mechanical properties and improve wetting The effect of increasing the wetting contact area

Pending Publication Date: 2020-08-25
SHENZHEN ACAD OF AEROSPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned method of using sizing agent to modify the surface of carbon fibers can improve the interfacial compatibility between carbon fibers and corresponding thermoplastic resins to

Method used

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  • Thermoplastic epoxy resin and application thereof, and surface modifier for carbon fibers
  • Thermoplastic epoxy resin and application thereof, and surface modifier for carbon fibers
  • Thermoplastic epoxy resin and application thereof, and surface modifier for carbon fibers

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The present embodiment provides a kind of modified carbon fiber, carries out according to the following steps:

[0028] (1) Synthesis of thermoplastic epoxy resin:

[0029] Mix 1000g of bisphenol A epoxy resin E51 and 250g of benzylamine, stir evenly, heat up to 150°C for 2 hours, and obtain thermoplastic epoxy resin B.

[0030] Add 30g of caprolactam into the three-necked flask, heat under reduced pressure to remove the original water, then add 2g of water, 5g of oxalic acid, and 1g of concentrated phosphoric acid in sequence, and heat to 160°C under nitrogen protection, react for 1 hour, and then heat up to 250°C °C to continue the reaction for 2 hours. Slowly cool after the reaction to obtain polyamide. 150 g of the above-mentioned thermoplastic epoxy resin B was heated up to 160° C., and then 30 g of polyamide and 0.005 g of stannous octoate were added to react for 6 hours. Add 0.005g stannous octoate again, react for 8 hours, obtain the thermoplastic epoxy resin...

Embodiment 2

[0036] The present embodiment provides a kind of modified carbon fiber, carries out according to the following steps:

[0037] (1) Synthesis of thermoplastic epoxy resin:

[0038] Mix 1000g of bisphenol A epoxy resin E51 and 250g of benzylamine, stir evenly, heat up to 150°C for 2 hours, and obtain thermoplastic epoxy resin B.

[0039]Add 30g of caprolactam into the three-necked flask, heat under reduced pressure to remove the original water, then add 2g of water, 5g of oxalic acid, and 1g of concentrated phosphoric acid in sequence, and heat to 160°C under nitrogen protection, react for 1 hour, and then heat up to 250°C °C to continue the reaction for 2 hours. Slowly cool after the reaction to obtain polyamide. 150 g of the above-mentioned thermoplastic epoxy resin B was heated up to 160° C., and then 30 g of polyamide and 0.005 g of stannous octoate were added to react for 6 hours. Add 0.005g stannous octoate again, react for 8 hours, obtain the thermoplastic epoxy resin ...

Embodiment 3

[0045] The present embodiment provides a kind of modified carbon fiber, carries out according to the following steps:

[0046] (1) Synthesis of thermoplastic epoxy resin:

[0047] Mix 1000g of bisphenol A epoxy resin E51 and 250g of benzylamine, stir evenly, heat up to 150°C for 2 hours, and obtain thermoplastic epoxy resin B.

[0048] Under nitrogen protection, add 10g of polyether diol, a few drops of dibutyltin dilaurate and 10g of 2,2-dimethylolpropionic acid dissolved in a small amount of N,N-dimethylformamide into the flask, stir The temperature was raised to 50° C., and 10 g of isophorone diisocyanate was added dropwise; after the dropwise addition, the temperature was raised to 80° C., and reacted for 2 hours to obtain polyurethane. Dissolve 150g of the above-mentioned thermoplastic epoxy resin B in chloroform, add 3g of butyl glycidyl ether reactive diluent, and stir evenly. Under the protection of nitrogen at 65°C, add the above polyurethane dropwise to the thermop...

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Abstract

The invention discloses thermoplastic epoxy resin and application thereof, and a surface modifier for carbon fibers. The thermoplastic epoxy resin comprises a structure as shown in a formula (I) whichis described in the specification, and can be applied as a surface modifier to surface treatment of carbon fibers. The carbon fibers treated by the thermoplastic epoxy resin have better interfacial compatibility with thermoplastic matrix resin, desizing treatment is not needed, influence on the strength loss of the carbon fibers is small, and good application prospects are obtained.

Description

technical field [0001] The invention relates to the technical field of carbon fiber modification, in particular to a thermoplastic epoxy resin and its application and a surface modifier for carbon fiber. Background technique [0002] As a high-performance fiber, carbon fiber has the characteristics of high strength, high modulus, small thermal expansion coefficient, and good chemical stability. It has become an important reinforcing material for resin-based composites in recent years. And with the continuous deepening of research on carbon fiber materials and the continuous improvement of processing technology, carbon fibers with excellent mechanical properties can achieve planned production and are widely used in aerospace, defense industry, automobile manufacturing, sporting goods and other fields. At present, the most used base resin is thermosetting resin, but there are also disadvantages such as difficult recycling, high cost, long molding cycle, and poor toughness. Th...

Claims

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Application Information

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IPC IPC(8): C08G81/00D06M15/59D06M15/55D06M15/564D06M15/507C08K9/04C08K7/06C08L75/04C08L77/00C08L67/00D06M101/40
CPCC08G81/00D06M15/59D06M15/55D06M15/564D06M15/507C08K9/08C08K7/06C08L75/04C08L77/00C08L67/00D06M2101/40
Inventor 晏义伍朱敏杰李常胜
Owner SHENZHEN ACAD OF AEROSPACE TECH
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