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Method for improving interfacial properties of aramid fiber/epoxy resin composite material

A technology of epoxy resin and composite materials, which is applied in fiber treatment, textile and papermaking, physical treatment, etc. It can solve the problem that the treatment method of fiber surface modification is not suitable for industrial production, and the interface between Kevlar-49 fiber and epoxy resin is weak, etc. question

Inactive Publication Date: 2008-06-25
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the current interface between Kevlar-49 fiber and epoxy resin is weak, and the treatment method for fiber surface modification is not suitable for industrial production, and provides a method to improve the aramid fiber / epoxy resin composite Material interface performance method

Method used

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Effect test

specific Embodiment approach 1

[0007] Embodiment 1: The method for improving the interfacial properties of the aramid fiber / epoxy resin composite material in this embodiment is: first dry the Kevlar-49 fiber; then seal the dried Kevlar-49 fiber together with the liquid medium in the glass reactor ; Then under the conditions of normal temperature and pressure and protective gas protection, use 60 Co is the γ-ray irradiation of the irradiation source, the irradiation dose is 0.1-1000 kGy, and the irradiation dose rate is 3-7 kGy / h.

[0008] Research on Kevlar-49 modification when liquid medium is used in this embodiment. Put the pre-dried fibers in a special glass container first, then vacuumize, inject liquid, and finally fill in nitrogen to seal at normal pressure, and use it under normal temperature conditions. 60 Gamma-ray irradiation of Co as the irradiation source. Under the condition of normal temperature and pressure, liquid immersion Kevlar-49 sealed co-irradiation grafting, the irradiation dose ra...

specific Embodiment approach 2

[0010] Embodiment 2: This embodiment is different from Embodiment 1 in that the protective gas is one of nitrogen, helium and argon or a mixture of several of them. Others are the same as in the first embodiment.

[0011] In this embodiment, when the shielding gas is a mixed gas, various shielding gases can be mixed in any ratio.

specific Embodiment approach 3

[0012] Embodiment 3: This embodiment is different from Embodiment 1 in that the protective gas is nitrogen. Others are the same as in the first embodiment.

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Abstract

An aramid fibre / epoxy resin composite interface performance improving method relates to a macromolecule material modification processing method. The invention solves the problems that the interface between the prior Kevlar-49 fibre and the prior epoxy resin has weak combination and the fiber surface modification processing method is not suitable for industrialized production. The Kevlar-49 fibre surface modification processing method of the invention is as follows: firstly the Kevlar-49 fibre is dried, then the dried Kevlar-49 fibre and liquid medium are sealed in a glass reactor; under the condition of normal temperature, normal atmosphere and the protection of protective gas, a gamma ray with <60>Co as radiation source is adopted to radiate; the radiation dosage is between 0.1 and 1000 kGy and the radiation dosage rate is between 3 and 7 kGy / h. The invention has the advantages of simple operation, stable technique, reliable product quality, environmental protection and industrialized production. The method of the invention improves the fibre surface energy, thereby improving the combination intensity of the interface between the fibre and the epoxy resin matrix and exerting the comprehensive performance of Kevlar-49 fiber reinforced composite farthest.

Description

technical field [0001] The invention relates to a polymer material modification treatment method, in particular to a method for improving the interfacial performance of polyparaphenylene terephthalamide (Kevlar-49) fiber / epoxy resin composite material. Background technique [0002] Poly(p-phenylene terephthalamide) (Kevlar-49) fiber is one of the organic fibers with excellent comprehensive properties produced on a large scale in the world. It has high strength, high modulus, strong toughness and excellent durability. It is widely used as a reinforcement material for advanced composite materials in the aerospace and automotive fields, and is a model for all aramid fiber applications. However, the amide group in the Kevlar-49 fiber is separated by the aromatic ring and forms a π-conjugated effect with the benzene ring. The internal rotation potential energy is quite high, and the molecular chain is rigid and straight, which is the main chain of the para-position Kevlar-49 fibe...

Claims

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Application Information

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IPC IPC(8): D06M10/00D06M13/50C08L63/00
Inventor 黄玉东张艳华刘立洵宋元军刘丽龙军张春华贺金梅
Owner HARBIN INST OF TECH
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