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A kind of intrinsic self-healing hyperbranched epoxy resin and its preparation method and application

An epoxy resin, self-healing technology, applied in the field of intelligent polymer materials, achieves the effects of good self-healing and solid-state recyclability, cheap and easy-to-obtain synthetic raw materials, and simple and feasible methods

Active Publication Date: 2020-04-10
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aromatic Schiff base bonds (-Ar-C=N-Ar-) have thermally excited dynamic reversible reaction characteristics, but there is no report on the preparation of intrinsic self-healing epoxy resins using aromatic Schiff base bonds

Method used

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  • A kind of intrinsic self-healing hyperbranched epoxy resin and its preparation method and application
  • A kind of intrinsic self-healing hyperbranched epoxy resin and its preparation method and application
  • A kind of intrinsic self-healing hyperbranched epoxy resin and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0047] Preparation Example 1 Preparation of phenolic compound monomer 1 containing aromatic Schiff base bond

[0048] Dissolve 10.9 parts of p-aminophenol and 12.2 parts of p-hydroxybenzaldehyde in 120 mL of absolute ethanol and pour them into a three-necked flask equipped with a stirring magnet. After passing argon for 10 minutes, heat to 60oC to react for 5 hours, and let it cool down. , Suction filtration, washing and drying to obtain a light yellow solid product (HIMP) with a yield of 72%. The proton nuclear magnetic resonance spectrum of the obtained product is shown in figure 1 , The synthesis reaction formula is as follows:

[0049]

preparation example 2

[0050] Preparation Example 2 Preparation of phenolic compound monomer 2 containing aromatic Schiff base bond

[0051] Dissolve 10.9 parts of p-aminophenol and 6.7 parts of p-dibenzaldehyde in 100 mL of absolute ethanol, pour them into a three-necked flask equipped with a stirring magnet, ventilate with argon for 10 minutes, and heat to 70°C to react for 3.5 hours. After cooling, suction filtration, washing and drying to obtain a light yellow solid product with a yield of 88%. The preparation and synthesis process is as follows:

[0052]

preparation example 3

[0053] Preparation Example 3 Preparation of phenolic compound monomer 3 containing aromatic Schiff base bond

[0054] Dissolve 12.2 parts of p-hydroxybenzaldehyde and 5.4 parts of p-phenylenediamine in 90 mL of absolute ethanol, pour them into a three-necked flask equipped with a stirring magnet, pass argon for 10 minutes, and heat to 65°C for 6 hours. After standing and cooling, suction filtration, washing and drying to obtain a light yellow solid product with a yield of 94%.

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Abstract

The invention relates to intrinsic self-repairing hyperbranched epoxy resin as well as a preparation method and application thereof. The hyperbranched epoxy resin is prepared from the following raw materials in parts by mass through reaction: 1-20 parts of a phenolic compound monomer containing aromatic schiff base bonds, 0.1-10 parts of a polyhydric alcohol monomer, 10-100 parts of an epoxy chloropropane monomer and 3-16 parts of a sodium hydroxide solution, wherein the hydroxyl functionality of the polyhydric alcohol monomer is more than 2, and the sum of the hydroxyl functionality of phenolic hydroxyl in the phenolic compound monomer containing the aromatic schiff base bonds and the hydroxyl functionality of hydroxyl in the polyhydric alcohol monomer is not less than 5. After the hyperbranched epoxy resin is cured, a large number of the schiff base bonds in an obtained network structure have thermal-activation dynamic reversible switching characteristics, so that an epoxy resin cured substance material has repeated self-repairing performance and solid-state recycling performance.

Description

Technical field [0001] The present invention relates to the field of intelligent polymer materials, in particular to an intrinsic self-repairing hyperbranched epoxy resin, and a preparation method and application thereof. Background technique [0002] Epoxy resin is a thermosetting resin with a large quantity and a wide range in the industry. The cured material formed by the reaction of epoxy resin and curing agent has the advantages of good mechanical properties, heat resistance, electrical insulation and dimensional stability, and has been widely used in the fields of electronic and electrical, chemical building materials, aerospace, packaging and transportation industries Applications. However, since the epoxy resin forms a three-dimensional cross-linked network structure after curing, it is insoluble and difficult to repair and recycle. Therefore, researching and preparing new self-repairing and solid-recoverable epoxy resins can not only extend the service life of epoxy re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/06C08G59/04
CPCC08G59/04C08G59/063
Inventor 容敏智谢振华章明秋
Owner SUN YAT SEN UNIV
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