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Preparation method of carbon fiber interface atomic-oxygen-resistant phosphorous coating

A technology resistant to atomic oxygen and carbon fiber, applied in the direction of carbon fiber, fiber treatment, chemical instruments and methods, etc., can solve problems such as thermal expansion coefficient mismatch, surface shape change, etc., and achieve the effect of simple production conditions and simple post-processing process

Active Publication Date: 2014-10-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic coatings have disadvantages such as brittleness, mismatch of thermal expansion coefficients, and changes in surface shape caused by atomic oxygen attack

Method used

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  • Preparation method of carbon fiber interface atomic-oxygen-resistant phosphorous coating
  • Preparation method of carbon fiber interface atomic-oxygen-resistant phosphorous coating
  • Preparation method of carbon fiber interface atomic-oxygen-resistant phosphorous coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Synthesis of bis(3-aminophenyl)phenylphosphine oxide ( figure 1 ):

[0026] (1) Nitration of triphenylphosphine oxide: Add 13.9 g of triphenylphosphine oxide and 100 ml of concentrated sulfuric acid in sequence into a container equipped with an electric stirrer, a constant pressure dropping funnel and a thermometer. The mixture of smoked nitric acid 7.4g and concentrated sulfuric acid 50ml is carried out under the condition of ice-salt bath. The temperature was controlled at -5°C, the time for dropping the mixed acid was controlled at 2 hours, and the reaction time was 8 hours. After the reaction is over, pour the reaction solution into a 1L container with ice-water mixture. When the temperature drops to room temperature, use chloroform to extract, use sodium bicarbonate or sodium carbonate aqueous solution to adjust the pH value to neutral, and wash it twice with water Finally, the chloroform solvent was removed to obtain a crude product, which was dried i...

Embodiment 2

[0030] 1. Synthesis of bis(3-aminophenyl)phenylphosphine oxide:

[0031] (1) For nitration of triphenylphosphine oxide, add 14 g of triphenylphosphine oxide and 100 ml of concentrated sulfuric acid in sequence into a container equipped with an electric stirrer, a constant pressure dropping funnel and a thermometer, and put fuming gas into the constant pressure dropping funnel. Nitric acid 7.4g and the mixture of concentrated sulfuric acid 50ml, react under the condition of ice-salt bath. The temperature is controlled at -10°C, the dropwise addition of mixed acid is controlled at 3 hours, and the reaction time is 10 hours. After the reaction is over, pour the reaction solution into a 1L container with ice-water mixture. When the temperature drops to room temperature, use chloroform to extract, use sodium bicarbonate or sodium carbonate aqueous solution to adjust the pH value to neutral, and wash it twice with water Finally, use a rotary evaporator for 4 hours to remove the chl...

Embodiment 3

[0035] 1. Synthesis of bis(3-aminophenyl)phenylphosphine oxide:

[0036](1) For nitration of triphenylphosphine oxide, add 13.8 g of triphenylphosphine oxide and 100 ml of concentrated sulfuric acid in sequence into a container equipped with an electric stirrer, a constant pressure dropping funnel and a thermometer, and put the hair into the constant pressure dropping funnel. The mixture of smoked nitric acid 7.5g and concentrated sulfuric acid 50ml is carried out under the condition of ice-salt bath. The temperature is controlled at -10°C, the dropwise addition of mixed acid is controlled at 3 hours, and the reaction time is 10 hours. After the reaction is over, pour the reaction solution into a 1L container with a mixture of ice and water. When the temperature drops to room temperature, use chloroform to extract, use sodium bicarbonate or sodium carbonate aqueous solution to adjust the pH value to neutral, and wash with water for 2~ After 5 times, finally use a rotary evapo...

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Abstract

The invention discloses a preparation method of a carbon fiber interface atomic-oxygen-resistant phosphorous coating. The method comprises the steps as follows: an epoxy resin and bis(3-aminophenyl)phenyl phosphine oxide mixture is dissolved in an acetone solvent to prepare a sizing agent, sizing coating treatment is performed on bare fibers, the mass ratio of acetone to the mixture in the sizing agent is in a range of (100-20):1, and the weight ratio of epoxy resin to bis(3-aminophenyl)phenyl phosphine oxide in the mixture is in a range of 1:(0.2-0.4). According to the preparation method of the carbon fiber interface atomic-oxygen-resistant phosphorous sizing coating, when the space is eroded by atomic oxygen, a phosphoric ester layer can be formed on the surface, so that the carbon fiber surface is protected against erosion by the atomic oxygen. The carbon fiber interface coating has the higher atomic oxygen resistance and can improve the bonding performance to the epoxy resin. The method is simple in technological preparation condition and simple and convenient in after-treatment process.

Description

technical field [0001] The invention relates to a method for preparing a carbon fiber anti-atomic oxygen coating. Background technique [0002] Most of the current low-orbit space composite materials do not have the ability to resist the erosion of atomic oxygen. After the atomic oxygen erodes the matrix, it will erode the reinforced carbon fiber. At this time, it is necessary to protect the carbon fiber from the atomic oxygen. By sizing the carbon fiber coating Finally, the performance of the material can be improved. However, space has many requirements for coatings: 1. Lightweight and tough; 2. Anti-atomic oxygen performance; 3. Anti-ultraviolet (wavelength 200-300) radiation; 4. Anti-micro debris impact; 5. High and low temperature resistance . [0003] In recent years, in the low earth orbit space environment, silicon-containing coatings are mainly used to react with atomic oxygen to lose organic components to form silicon dioxide. As the density increases, the coati...

Claims

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Application Information

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IPC IPC(8): D06M15/55D06M13/44C07F9/53D06M101/40
Inventor 贺金梅王梓桥黄玉东赵丹尉枫
Owner HARBIN INST OF TECH
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