Preparation method of degradable high-performance fiber reinforced epoxy resin-based composite material

A high-performance fiber and epoxy resin technology, which is applied in the preparation of high-performance resin-based composite materials, composite fiber recycling, and degradation fields, can solve the problem of fiber-reinforced body structure damage, harsh degradation conditions, and fiber-reinforced epoxy resin. The problem of difficult degradation of matrix composite materials and other problems, to achieve the effect of mild degradation conditions

Active Publication Date: 2022-01-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of difficult degradation of fiber-reinforced epoxy resin-based composite materials, harsh degradation conditions, and damage to the performance and structure of fiber-reinforced bodies after recycling.

Method used

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  • Preparation method of degradable high-performance fiber reinforced epoxy resin-based composite material
  • Preparation method of degradable high-performance fiber reinforced epoxy resin-based composite material
  • Preparation method of degradable high-performance fiber reinforced epoxy resin-based composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0036] In this example, 4,5-epoxyhexane-1,2-dicarboxylic acid diglycidyl ester and 4,4'-oxydiphthalic anhydride were purchased from Beijing Yinuokai Reagent Co., Ltd. Ethylene glycol was purchased from Sarn Chemical Technology (Shanghai) Co., Ltd. T300 carbon fiber woven fabric (GW3011) was purchased from Weihai Tuban Fiber Co., Ltd., China.

[0037] This embodiment includes a degradable, high-performance fiber-reinforced epoxy resin-based composite material preparation method and degradation steps, including the following steps:

[0038] (1) Pretreatment of the epoxy resin and the curing agent containing the functional group participating in the effect of the adjacent group.

[0039] Preheat 4,5-epoxyhexane-1,2-dicarboxylic acid diglycidyl ester with a mole fraction of 30% at 85-100°C, add 4,4'-oxydiphthalate with a mole fraction of 70% Formic anhydride, keep stirring, and gradually raise the temperature until the solid is completely dissolved and mixed evenly.

[0040] (2...

Embodiment 2

[0044]In this example, 4,4'-diaminodiphenylmethane epoxy resin, pyromellitic dianhydride and phthalic anhydride were purchased from Beijing Yinuokai Reagent Co., Ltd. Ethylene glycol was purchased from Sarn Chemical Technology (Shanghai) Co., Ltd. T300 carbon fiber woven fabric (GW3011) was purchased from Weihai Tuban Fiber Co., Ltd., China.

[0045] This embodiment includes a degradable, high-performance fiber-reinforced epoxy resin-based composite material preparation method and degradation steps, including the following steps:

[0046] (1) Pretreatment of the epoxy resin and the curing agent containing the functional group participating in the effect of the adjacent group.

[0047] Preheat the 4,4'-diaminodiphenylmethane epoxy resin with a mole fraction of 40% at 85-100°C, and add a mixture of pyromellitic dianhydride and phthalic anhydride with a mole fraction of 60%, without Stop stirring, and gradually increase the temperature until the solids are completely dissolved ...

Embodiment 3

[0052] In this example, the hyperbranched epoxy resin was synthesized by reacting bisphenol A epoxy resin with 2-ethyl-2-(hydroxymethyl)-1,3-propanediol in a solvent-free condition in one step. Pyromellitic dianhydride was purchased from Beijing Yinuokai Reagent Co., Ltd. Ethylene glycol was purchased from Sarn Chemical Technology (Shanghai) Co., Ltd. Fiberglass woven cloth (EW250F) was purchased from Weihai Tudou Fiber Co., Ltd., China.

[0053] This embodiment includes a degradable, high-performance fiber-reinforced epoxy resin-based composite material preparation method and degradation steps, including the following steps:

[0054] (1) Pretreatment of epoxy resin and compounds containing ortho-group functional groups.

[0055] Preheat the hyperbranched epoxy resin with a mole fraction of 20% at 85-100°C, add pyromellitic dianhydride with a mole fraction of 80%, keep stirring, and gradually heat up until the solid is completely dissolved and mixed evenly.

[0056] (2) Pou...

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Abstract

The invention provides a preparation method of a degradable high-performance fiber reinforced epoxy resin-based composite material, and belongs to the technical field of high-performance fiber reinforced epoxy resin-based composite materials. The degradable high-performance fiber reinforced epoxy resin-based composite material is prepared by mixing epoxy resin with three or more oxygen-containing functional groups, a curing agent at least comprising one anhydride and a long fiber reinforcement, curing, performing hot press molding and cooling. The organic matter participating in preparation of the resin matrix has an ortho-position group effect, so that the resin network can be topologically rearranged under a mild condition. The fiber reinforced epoxy resin-based composite material can be completely degraded on the basis of ensuring that the mechanical and thermal properties of the fiber reinforced epoxy resin-based composite material are equivalent to those of a traditional epoxy resin-based composite material, and the recycled long fiber reinforcement is consistent with the original fiber in performance and structure. The fiber reinforced epoxy resin-based composite material prepared by the method effectively saves a large amount of fiber resources, and has practical application value under the concept of sustainable development.

Description

Technical field: [0001] The invention relates to the technical field of high-performance resin-based composite material preparation, degradation, and composite material fiber recovery. In particular, it relates to a preparation method of a degradable and high-performance fiber-reinforced epoxy resin-based composite material. Background technique: [0002] Fiber-reinforced epoxy resin-based composites are widely used in the fields of aerospace, automobile industry, and military manufacturing due to their high specific strength, high specific modulus, and good dimensional stability. However, due to the permanent cross-linked network structure of the existing fiber-reinforced epoxy resin-based composite materials, it is difficult to completely separate the fiber-reinforced body from the epoxy resin matrix, and the recovery and reuse of fibers in composite materials is very difficult. difficulty. [0003] At present, the commonly used composite fiber recycling methods mainly i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/04C08L63/00C08L63/02C08L77/00C08K7/06C08K7/14
CPCC08J5/042C08J5/043C08J5/046C08J2363/00C08J2363/02C08J2477/00Y02W30/62
Inventor 胡君赵梓含吴剑桥
Owner BEIJING UNIV OF CHEM TECH
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