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Ultraviolet fluorescent epoxy-resin and carbon-fiber prepreg material for sacrificial layer

A carbon fiber prepreg, epoxy resin technology, applied in the field of polymer materials, can solve the problems of severe thermal stress, easy damage to the body, difficult to measure, etc., to achieve the effect of improving surface quality

Active Publication Date: 2019-04-12
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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  • Ultraviolet fluorescent epoxy-resin and carbon-fiber prepreg material for sacrificial layer
  • Ultraviolet fluorescent epoxy-resin and carbon-fiber prepreg material for sacrificial layer
  • Ultraviolet fluorescent epoxy-resin and carbon-fiber prepreg material for sacrificial layer

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Experimental program
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Effect test

Embodiment 1

[0038] The raw materials were weighed and mixed uniformly according to the following mass ratios to prepare the ultraviolet fluorescent epoxy resin: epoxy resin matrix: composite curing agent: thixotropic agent: ultraviolet fluorescent powder=100:20:2:5. Wherein, the epoxy resin matrix is ​​a mixture of two kinds of bisphenol A epoxy resins, and the ratio is 1:1; the curing agent is an amine curing agent. Mix and stir the epoxy resin matrix in the stainless steel barrel, and at the same time raise the temperature to 80℃~110℃, stop the heating after observing the color of the resin is uniform and translucent. When the temperature in the stainless steel barrel drops to 50℃~60℃, continue to add the composite curing agent and stir. Evenly, then add thixotropic agent and ultraviolet phosphor powder in turn, and stir at high speed. The particle size of ultraviolet phosphor powder is 10um, so that the resin mixture is stirred evenly.

[0039] The mixed ultraviolet fluorescent epoxy r...

Embodiment 2

[0043] The raw materials were weighed and mixed uniformly according to the following mass ratios to prepare the ultraviolet fluorescent epoxy resin: epoxy resin matrix: composite curing agent: ultraviolet fluorescent powder=100:40:8. 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 at the same time raise the temperature to 70℃~90℃, stop heating after observing the color of the resin is uniform and translucent, when the temperature in the stainless steel barrel drops to 50℃~60℃, continue adding the composite curing agent and stirring Evenly, then add the toughening agent and the ultraviolet phosphor powder in turn and stir at a high speed. The particle size of the ultraviolet phosphor 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 glue film machine at...

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Abstract

The invention belongs to the technical field of polymer materials, and relates to an ultraviolet fluorescent epoxy-resin and carbon-fiber prepreg material for a sacrificial layer. The ultraviolet fluorescent epoxy-resin and carbon-fiber prepreg material is prepared from the following raw materials by mass: 100 parts of an epoxy resin matrix, 10 to 50 parts of a composite curing agent, 0 to 50 parts of an auxiliary agent and 1 to 50 parts of ultraviolet fluorescent powder. According to the invention, a method of adding the ultraviolet fluorescent powder into the sacrificial layer is adopted toprepare an epoxy-resin and carbon-fiber prepreg material, so the sacrificial layer can be distinguished from a body only with the need of adopting an ultraviolet lamp for irradiation during milling ofa composite material component; the problem of insusceptibility to distinguishing of a carbon-fiber prepreg sacrificial layer is solved; the problems of easy damage to the body due to improperly-controlled feeding amount and uneasiness in measurement for the carbon-fiber prepreg material as the sacrificial layer during assembling and milling are avoided; the problem of super-poor assembling of large-sized composite material components like wing covering and spars is improved; meanwhile, the surface quality of the large-sized composite material components is 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 sacrificial layers. 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 assembling, it is inevitable to encounter the problem of assembly out-of-tolerance, and the composite material preparation process is complicated and prone to curing deformation, which leads to the more prominent assembly out-of-tolerance problem. According to the traditional method, the method of adding gaskets / mandatory assembly is usually used to solve the problem of assembly out-of-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 det...

Claims

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Application Information

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Patent Type & Authority Applications(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