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A kind of heat-resistant coating preparation method of carbon fiber reinforced polyimide composite board

A technology of polyimide and heat-resistant coating, which is applied in the field of preparation of heat-resistant coating of carbon fiber reinforced polyimide composite board, can solve the problems of complex production process, unsuitability for industrial production, high production cost, etc. Achieve the effect of high bonding strength, suitable for industrial production, and easy operation

Active Publication Date: 2016-06-01
AVIC BASIC TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are mainly nickel plating, tungsten carbide, cobalt, etc., but the disadvantages of these methods are that the production cost is relatively high, the production process is complicated, and it is not suitable for industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Mix and stir 75% phenolic resin, 5% absolute ethanol, and 20% ammonium chloride in sequence according to the mass fraction to obtain a premixed coating;

[0032] (2) Weigh 25% p-toluenesulfonic acid by weight of the premixed paint, mix it into the premixed paint, and stir evenly to obtain the paint.

[0033] (3) Use acetone as the cleaning solution to clean the sample with an ultrasonic cleaner, wipe the surface of the sample with absolute ethanol, and let it dry naturally for use.

[0034] (4) Apply paint to the surface of the sample by brushing, then dry and solidify the coated sample in the air naturally, and then place the dried sample in a blast drying oven with a set temperature of 100 °C for drying.

[0035] (5) Repeat the process of (3) to obtain a coating with 3-4 layers.

[0036] (6) Perform thermal shock treatment at 500°C for 1 minute on the coated composite material. There is no change in the appearance of the treated sample. After the three-point be...

Embodiment 2

[0038] (1) Mix and stir 75% epoxy resin, 5% absolute ethanol, and 25% ammonium chloride in sequence according to the mass fraction to obtain a premixed coating;

[0039] (2) Weigh 30% p-toluenesulfonic acid by weight of the premixed paint, mix it into the premixed paint, and stir evenly to obtain the paint.

[0040] (3) Use acetone as the cleaning solution to clean the sample with an ultrasonic cleaner, wipe the surface of the sample with absolute ethanol, and let it dry naturally for use.

[0041] (4) Apply paint to the surface of the sample by brushing, then dry and solidify the coated sample in the air naturally, and then place the dried sample in a blast drying oven with a set temperature of 100 °C for drying.

[0042] (5) Repeat the process of (3) to obtain a coating with 3-4 layers.

[0043] (6) Perform thermal shock treatment at 500°C for 1 minute on the coated composite material. There is no change in the appearance of the treated sample. After the three-point bendi...

Embodiment 3

[0045] (1) Mix and stir 65% phenolic resin, 5% absolute ethanol, and 30% ammonium chloride in sequence according to the mass fraction to obtain a premixed coating;

[0046] (2) Weigh 30% p-toluenesulfonic acid by weight of the premixed paint, mix it into the premixed paint, and stir evenly to obtain the paint.

[0047] (3) Use acetone as the cleaning solution to clean the sample with an ultrasonic cleaner, wipe the surface of the sample with absolute ethanol, and let it dry naturally for use.

[0048] (4) Apply paint to the surface of the sample by brushing, then dry and solidify the coated sample in the air naturally, and then place the dried sample in a blast drying oven with a set temperature of 100 °C for drying.

[0049] (5) Repeat the process of (3) to obtain a coating with 3-4 layers.

[0050] (6) Perform thermal shock treatment at 500°C for 1 minute on the coated composite material. There is no change in the appearance of the treated sample. After the three-point be...

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Abstract

The invention relates to a preparation method of a refractory coating for carbon fiber enhanced polyimide composite board. The method comprises the steps of: (1) mixing anhydrous alcohol, alcohol soluble resin (phenolic resin or epoxy resin) and ammonium chloride powder according to a certain proportion, and stirring evenly a premixed coating; (2) according to the weight of the premixed coating, weighing a certain proportion of p-toluenesulfonic acid, mixing p-toluenesulfonic acid with the pre-mixed coating, and stirring evenly to obtain a final coating; (3) evenly coating a sample surface with the above coating, then naturally curing the sample coated with the coating in the air, and drying the sample in an air blast drying box at a certain temperature; and (4) repeating the step (3) to obtain samples with different layers. The preparation process provided by the invention has simple requirements and is suitable for industrial production; and the refractory coating prepared by the invention has high combination strength, uniform coating and good heat shock resistance.

Description

technical field [0001] The invention belongs to the field of preparation of heat-resistant coatings for carbon fiber reinforced polyimide composite boards, in particular to a method for preparing heat-resistant coatings for carbon fiber reinforced polyimide composite boards. Background technique [0002] Carbon fiber-reinforced polyimide composites have comprehensive properties such as light weight, high specific strength, and resistance to a certain temperature (300°C), making them one of the main materials for weight reduction of aero-engine casings. However, under abnormal working conditions of the aeroengine, the composite material will withstand a high temperature environment of 500°C for about 1 minute. During this period, the thermal decomposition of the polyimide will cause blisters on the surface of the composite material, and the mechanical properties will be seriously reduced, which will affect the normal operation of the turbine or cause it to fail. Work. The ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D161/00C09D163/00C09D7/12C08J7/04
Inventor 邱海鹏王宇陈明伟焦健李秀倩高淑雅
Owner AVIC BASIC TECH RES INST
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