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A room temperature self-healing fiber-reinforced epoxy composite material and its preparation method

A fiber-reinforced material and fiber-reinforced technology, applied in the field of room temperature self-repairing fiber-reinforced epoxy composite materials and its preparation, can solve the problems of hollow glass fiber preparation and processing difficulties, automatic outflow of repairing agents, and non-automatic repairing, etc., to achieve High chemical reactivity, low freezing point and viscosity, easy flow effect

Active Publication Date: 2016-08-17
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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  • A room temperature self-healing fiber-reinforced epoxy composite material and its preparation method
  • A room temperature self-healing fiber-reinforced epoxy composite material and its preparation method
  • A room temperature self-healing fiber-reinforced epoxy composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Arrange capillary PP plastic tubes with an outer diameter of 250 μm and an inner diameter of 200 μm in a straight line at a pitch of 750 μm on a mold coated with polytetrafluoroethylene film. Inject liquid epoxy resin 711 containing foaming agent ABVN as repairing agent and liquid polythiol pentaerythritol tetrakis(mercapto propionate) containing foaming agent and catalyst N,N-dimethylbenzylamine into PP pipe , the foaming agent quality in the liquid epoxy resin and polythiol is 3% of the epoxy resin or polythiol, and the catalyst quality is 0.4% of the polythiol quality. Apply a mixture of 1.00g base epoxy resin bisphenol A glycidyl ether (EPON828) and 0.21g curing agent (addition reaction product of tetraethylenepentamine and acrylonitrile at a mass ratio of 2.5 / 1) to 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 of glass fiber with a mixture of 19.75g of base epoxy...

Embodiment 2

[0037] Liquid epoxy resin 711 containing foaming agent ABVN as repair agent and liquid polythiol containing foaming agent and catalyst N,N-dimethylbenzylamine are injected into the PP pipe interphase, liquid epoxy resin and polysulfide The quality of foaming agent in alcohol is 5% of epoxy resin or polythiol. All the other are identical with embodiment 1.

Embodiment 3

[0039] Liquid epoxy resin 711 containing foaming agent ABVN as repair agent and liquid polythiol containing foaming agent and catalyst N,N-dimethylbenzylamine are injected into the PP pipe interphase, liquid epoxy resin and polysulfide The blowing agent quality in alcohol is 3% of epoxy resin or polythiol, and the catalyst quality is 0.8% of polythiol quality. All the other are identical with embodiment 1.

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Abstract

The invention discloses a room temperature self-repairing fiber-reinforced epoxy composite material and a preparation method thereof. The method loads a repairing agent through a capillary tube and embeds it between layers of the fiber-reinforced epoxy composite material. The repairing agent contains a certain amount of foaming agent. After the composite material is formed, it is heated to above the decomposition temperature of the foaming agent to generate positive pressure in the capillary tube. When the material is damaged and causes capillary fragmentation, the repair agent can quickly flow to the fracture surface under pressure and react, thereby bonding the cracks back together and the material damage can be repaired. The outstanding feature of this material is that the capillary can provide enough repair agent to make the material have high repair efficiency, and the introduction of foaming agent ensures that the repair agent in the capillary can flow out quickly and automatically when the material is damaged.

Description

technical field [0001] The invention relates to a self-repairing material, more specifically, to a room-temperature self-repairing fiber-reinforced epoxy composite material and a preparation method thereof. Background technique [0002] Fiber-reinforced epoxy composites are superior to metal materials in terms of specific strength, shock absorption, corrosion resistance, and processing performance, and are indispensable materials in aerospace, automotive, construction, and electronics industries. However, during the preparation and use of this material, due to various reasons, microcracks, micropores or local damage are likely to occur inside, and may further expand into macroscopic damage, resulting in a decrease in the mechanical properties of the material until it fails completely. It can manifest as debonding of substrate and reinforcement, interlaminar cracking or fracture of reinforcement. Material damage often brings catastrophic consequences in engineering. Therefo...

Claims

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Application Information

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Patent Type & Authority Patents(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