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A kind of ultraviolet fluorescent epoxy resin carbon fiber prepreg for sacrificial layer

A technology of carbon fiber prepreg and epoxy resin, which is applied in the field of polymer materials, can solve problems such as severe thermal stress, easy damage to the body, and difficult measurement, and achieve the effect of improving surface quality

Active Publication Date: 2021-07-16
AVIC BASIC TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When preparing a carbon fiber composite structure, it is easier to distinguish using glass fiber prepreg as a sacrificial layer, and it is not easy to damage the body during milling, but it will cause more serious thermal stress; there is no thermal deformation when using the same carbon fiber prepreg as the body Problem, however, the sacrificial layer is exactly the same as the body, if the feed rate is not properly controlled during assembly and milling, it is easy to damage the body and it is not easy to measure

Method used

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  • A kind of ultraviolet fluorescent epoxy resin carbon fiber prepreg for sacrificial layer
  • A kind of ultraviolet fluorescent epoxy resin carbon fiber prepreg for sacrificial layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The ultraviolet fluorescent epoxy resin was prepared by weighing each raw material according to the following mass ratio: epoxy resin matrix: composite curing agent: thixotropic agent: ultraviolet fluorescent powder = 100:20:2:5. Among them, the epoxy resin matrix is ​​a mixture of two bisphenol A epoxy resins, the ratio of which is 1:1; the curing agent is an amine curing agent. Mix and stir the epoxy resin matrix in a stainless steel bucket, and raise the temperature to 80°C to 110°C at the same time, stop heating after observing that the color of the resin is uniform and bright, and continue to add the composite curing agent and stir when the temperature in the stainless steel bucket drops to 50°C to 60°C Evenly, then add the thixotropic agent and ultraviolet fluorescent powder in sequence and stir at high speed. The particle size of the ultraviolet fluorescent powder is 10um, so that the resin mixture is stirred evenly.

[0039] The mixed ultraviolet fluorescent epo...

Embodiment 2

[0043] Each raw material was weighed and mixed uniformly to prepare ultraviolet fluorescent epoxy resin according to the following mass ratio: epoxy resin matrix: composite curing agent: ultraviolet fluorescent powder = 100:40:8. Wherein, the epoxy resin matrix is ​​a glycidyl ester epoxy resin, and the curing agent is an amine curing agent. Heat and stir the epoxy resin matrix in a stainless steel barrel, and raise the temperature to 70°C-90°C at the same time, stop heating after observing that the color of the resin is uniform and bright, and continue to add the composite curing agent and stir when the temperature in the stainless steel barrel drops to 50°C-60°C Uniformly, then add the toughening agent and ultraviolet fluorescent powder in sequence and stir at high speed, the particle size of the ultraviolet fluorescent powder is 15um, so that the resin mixture is stirred evenly.

[0044] The mixed ultraviolet fluorescent epoxy resin is coated on the release paper on a film ...

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Abstract

The invention belongs to the technical field of polymer materials and relates to an ultraviolet fluorescent epoxy resin carbon fiber prepreg for a sacrificial layer. The ultraviolet fluorescent epoxy resin carbon fiber prepreg is made of the following raw materials in parts by mass: 100 parts of epoxy resin matrix, 10-50 parts of composite curing agent, 0-50 parts of auxiliary agent, and 1-50 parts of ultraviolet fluorescent powder. The invention adopts the method of adding ultraviolet fluorescent powder in the sacrificial layer to prepare the epoxy resin carbon fiber prepreg, so that when the composite material component is milled, the sacrificial layer and the body can be distinguished only by ultraviolet light irradiation, which solves the problem of carbon fiber prepreg sacrifice. It avoids the problem that the carbon fiber prepreg is used as a sacrificial layer when the feed rate is not properly controlled during assembly and milling, and it is easy to damage the body, and it is not easy to measure. The assembly tolerance problem of material components has been solved, and the surface quality of large composite material components has been greatly improved.

Description

technical field [0001] The invention belongs to the technical field of polymer materials and relates to an ultraviolet fluorescent epoxy resin carbon fiber prepreg for a sacrificial layer. Background technique [0002] At present, composite materials have been widely used in the main load-bearing structures of military and civil aircraft, such as wing skins and spars. In the process of manufacturing and assembly, it is inevitable to encounter the problem of assembly out-of-tolerance, and the preparation process of composite materials is complicated, and it is prone to curing deformation, which makes the problem of assembly out-of-tolerance more prominent. According to the traditional method, the method of adding gaskets / forced assembly is usually used to solve the problem of assembly tolerance. However, adding gaskets will reduce the strength of the connection structure and easily cause sealing problems. Forced assembly will lead to large local assembly stress, which is unfa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K7/06C08J5/24
CPCC08J5/24C08J2363/00C08K7/06
Inventor 王迎芬潘翠红石峰晖
Owner AVIC BASIC TECH RES INST