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Room-temperature self-repairing fiber-reinforced epoxy composite material and preparation method thereof

A fiber-reinforced material and fiber-reinforced technology are applied in the field of room temperature self-healing fiber-reinforced epoxy composite materials and their preparation, which can solve the problems of difficult preparation and processing of hollow glass fibers, automatic outflow of repair agents, and no commercial products, etc. High chemical reactivity, low freezing point and viscosity, easy flow effect

Active Publication Date: 2014-02-05
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hollow glass fiber used by I.P. Bond is difficult to prepare and process, and there is no commercial product
Moreover, after the material is damaged and the hollow fiber is broken, it is difficult for the repairing agent to flow out automatically by means of capillary action, and heating and vacuuming must be used to make the repairing agent flow out and reach the fracture surface of the material. In fact, manual intervention has been used. , which do not belong to the category of automatic repair

Method used

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  • Room-temperature self-repairing fiber-reinforced epoxy composite material and preparation method thereof
  • Room-temperature self-repairing fiber-reinforced epoxy composite material and preparation method thereof
  • Room-temperature self-repairing fiber-reinforced epoxy composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Capillary PP plastic tubes with an outer diameter of 250 μm and an inner diameter of 200 μm are arranged straight on a mold covered with a polytetrafluoroethylene film at a pitch of 750 μm. Inject the liquid epoxy resin 711 containing the blowing agent ABVN as a repair agent and the liquid polythiol pentaerythritol tetra (mercaptopropionate) containing the blowing agent and the catalyst N,N-dimethylbenzylamine into the PP pipe alternately , The mass of blowing agent in liquid epoxy resin and polythiol is 3% of epoxy resin or polythiol, and the mass of catalyst is 0.4% of polythiol mass. Coat a mixture of 1.00g base epoxy resin bisphenol A glycidyl ether (EPON828) and its 0.21g curing agent (addition reaction product of tetraethylenepentamine and acrylonitrile in a mass ratio of 2.5 / 1) on the PP pipe After the epoxy resin is pre-cured, the self-repairing prepreg tape is obtained, with a width of 9mm and a length of 90mm. Infiltrate 50.00g glass fiber with a mixture of 19...

Embodiment 2

[0037] Inject the liquid epoxy resin 711 containing the blowing agent ABVN as a repair agent and the liquid polythiol containing the blowing agent and the catalyst N,N-dimethylbenzylamine into the PP pipe, liquid epoxy resin and polysulfide alternately. The mass of foaming agent in alcohol is 5% of epoxy resin or polythiol. The rest is the same as in Example 1.

Embodiment 3

[0039] Inject the liquid epoxy resin 711 containing the blowing agent ABVN as a repair agent and the liquid polythiol containing the blowing agent and the catalyst N,N-dimethylbenzylamine into the PP pipe, liquid epoxy resin and polysulfide alternately. The mass of blowing agent in alcohol is 3% of epoxy resin or polythiol, and the mass of catalyst is 0.8% of polythiol. The rest is the same as in Example 1.

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Abstract

The invention discloses a room-temperature self-repairing fiber-reinforced epoxy composite material and a preparation method thereof. According to the method, a repairing agent is loaded in a capillary tube, and buried among fiber-reinforced epoxy composite material layers, and the repairing agent contains a certain amount of foaming agent. After being formed, the composite material is heated above the decomposition temperature of the foaming agent, so that the interior of the capillary tube produces positive pressure. When the material is damaged to cause the breakage of the capillary tube, the repairing agent can fast flow to a breakage surface and produce reaction under the promotion of pressure, thus rebinding cracks together and repairing the damage of the material. The material has the outstanding characteristics that the capillary tube can provide enough repairing agent, so that the material has higher repair efficiency; through the introduction of the foaming agent, the repairing agent in the capillary tube can be guaranteed to fast flow automatically when the material is damaged.

Description

Technical field [0001] The invention relates to a self-repairing material, and more specifically, to a room temperature self-repairing fiber-reinforced epoxy composite material and a preparation method thereof. Background technique [0002] Fiber-reinforced epoxy composite materials have better specific strength, damping and shock absorption, corrosion resistance and processing performance than metal materials, and are indispensable materials in aerospace, automotive, construction and electronics industries. However, this material is prone to internal micro-cracks, micro-pores or local damage due to various reasons during the preparation and use process, and may further expand into macroscopic damage, resulting in a decrease in the mechanical properties of the material until complete failure. In polymer composites It can be manifested as debonding of the substrate and reinforcement, interlayer cracking or fracture of the reinforcement. Material damage often brings catastrophic c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L63/02C08K7/14C08K7/06C08K7/10C08K7/08C08K7/00C08L23/12C08L33/12C08L69/00C08L25/06C08J9/10C08J9/08C08J5/24C08J5/04
Inventor 朱勇容敏智章明秋叶小机
Owner SUN YAT SEN UNIV
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