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A conductive epoxy resin for modified carbon fiber composite laminates

A technology of conductive epoxy resin and fiber composite material, applied in the field of conductive epoxy resin material and preparation, can solve the problems of structural mechanical properties decline, fiber breakage, etc., and achieve the effect of improving electrical conductivity and mechanical properties

Active Publication Date: 2021-04-06
AIR FORCE UNIV PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conductivity of carbon fiber / epoxy resin composite laminates is mainly determined by carbon fibers with high conductivity, while the resin matrix that plays a role in wrapping and supporting is insulated and non-conductive, making the conductivity of carbon fiber composites far from that of traditional metals. Lightning damage to it includes high-temperature ablation pyrolysis of resin, fiber breakage, and delamination damage caused by the shock wave effect. These damages reduce the mechanical properties of the structure and cause incalculable consequences for flight safety.

Method used

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  • A conductive epoxy resin for modified carbon fiber composite laminates
  • A conductive epoxy resin for modified carbon fiber composite laminates
  • A conductive epoxy resin for modified carbon fiber composite laminates

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Experimental program
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Embodiment Construction

[0031] The technical solution and preparation process of the present invention will be described in detail below in conjunction with specific examples.

[0032] Table 1 prepares the main raw material of conductive epoxy resin

[0033]

[0034] Preparation and testing instruments used in the experiment of preparing conductive epoxy resin in table 2

[0035]

[0036] Its raw material ratio of modified conductive epoxy resin comprises by mass percentage:

[0037]

[0038]

[0039] Preferred raw material formula is by mass percent:

[0040]

[0041] Preparation Process

[0042] a. Carbon nanotube treatment

[0043] Take a certain amount of carbon nanotubes and dry them at 70-90°C; accurately weigh the carbon nanotubes after drying to the required gram weight, and add ethylene glycol ether to dissolve them; Disperse for 1.5-3 hours. It is preferably dried at 80°C, ultrasonic frequency is 80Hz, and ultrasonic time is 2h.

[0044] b. Preparation of epoxy resin

...

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Abstract

A conductive epoxy resin for modified carbon fiber composite laminates, comprising the following components: epoxy resin E‑51, carbon nanotubes, diaminodiphenylsulfone (DDS), boron trifluoride ethylamine (BF3 ‑400), carbomer 941, ethylene glycol ether, defoamer 5120, conductive silver powder Ag‑S1. The present invention can be used to modify the conductive epoxy resin of the carbon fiber composite material laminate, and the conductive silver powder is used as the main conductive filler to modify the insulating epoxy resin, which can realize the improvement of electrical conductivity and mechanical properties, and use this conductive epoxy resin Laminates prepared with carbon fibers can be used in the field of lightning protection.

Description

technical field [0001] The invention relates to a conductive epoxy resin material and a preparation method for modified carbon fiber composite material laminates. Background technique [0002] Lightning is a natural phenomenon in the atmosphere. When the electric field strength between the clouds or between the clouds and the bottom surface reaches the order of 1000kv / m, the atmosphere will be ionized to form a conductive plasma flow, thereby generating plasma that releases and neutralizes the charge The conductive channel of the body, the current on the channel is huge, and the temperature is extremely high, which makes the air flow expand instantly, producing bright and dazzling lightning and deafening thunder. Aircraft flying in thunderstorm weather, the possibility of being struck by lightning is unavoidable. According to statistics, there are no less than 100 incidents of lightning hitting airplanes every year. The conductivity of carbon fiber / epoxy resin composite lam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L33/00C08K13/02C08K3/08C08K3/04
CPCC08K2003/0806C08K2201/001C08K2201/011C08L63/00C08L33/00C08K13/02C08K3/08C08K3/041
Inventor 肖尧李曙林常飞翟广坤王景平
Owner AIR FORCE UNIV PLA