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Composite atomic-oxygen resistant coating solution and atomic-oxygen resistant coating preparing method

A kind of antigenic oxygen and coating technology, applied in coating, alkali metal silicate coating and other directions, can solve the problems of surface shape change, thermal expansion coefficient mismatch, etc., to achieve sufficient crystallization, high thermodynamically stable valence state, high antigenic Effect of Sub-Oxygen Properties

Inactive Publication Date: 2005-06-22
SHENZHEN UNIV
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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 due to atomic oxygen undercutting.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The ratio of raw materials is: ethanol, 50 grams, tetraethyl orthosilicate 10 grams, nano silicon oxide 0.5 grams, nano aluminum oxide 0.3 grams, KH-570, 5 grams, deionized water 1 grams, acetic acid 0.1 grams. After mixing, stir with a magnetic stirrer for 200 minutes, let the solution stand for 100 minutes, pour it into a container and seal it, and after 40 hours, pour out part of the solution for coating. The coating is prepared by the pulling method, the pulling speed is 10 cm / min, the number of pulling is 10 times, and the pulling gap is 5 minutes. After drying in the air for 20 minutes, put it into a heat treatment furnace at a temperature of 120° C. and a heat treatment time of 60 minutes. The total irradiation amount of atomic oxygen reaches 5.4×10 20 / cm 2 Irradiation experiments show that the samples protected by the anti-atomic oxygen coating have no difference in the scanning electron microscope morphology before and after atomic oxygen irradiation. That ...

Embodiment 2

[0016] The ratio of raw materials is: ethanol, 20 grams, ethyl orthosilicate 10 grams, nano silicon oxide 0.2 grams, nano aluminum oxide 0.1 grams, KH-570, 5 grams, deionized water 1 grams, acetic acid 0.2 grams. After mixing, stir with a magnetic stirrer for 400 minutes, let the solution stand for 30 minutes, pour it into a container and seal it, and after 30 hours, pour out part of the solution for coating. The coating is prepared by the pulling method, the pulling speed is 5cm / min, the number of pulling is 2 times, and the pulling gap is 2 minutes. After drying in the air for 10 minutes, put it into a heat treatment furnace at a temperature of 85° C. and a heat treatment time of 20 minutes. The total irradiation amount of atomic oxygen reaches 5.4×10 20 / cm 2 Irradiation experiments show that the samples protected by the anti-atomic oxygen coating have no difference in the scanning electron microscope morphology before and after atomic oxygen irradiation. That is, the su...

Embodiment 3

[0018] The ratio of raw materials is: ethanol, 200 grams, 10 grams of tetraethyl orthosilicate, 0.7 grams of nano-silicon oxide, 0.0 grams of nano-alumina, 2 grams of KH-570, 1 gram of deionized water, and 0.1 gram of hydrochloric acid. After mixing, stir with a magnetic stirrer for 80 minutes, let the solution stand for 240 minutes, pour it into a container and seal it, and after 40 hours, pour out part of the solution for coating. The coating is prepared by a pulling method, the pulling speed is 8 cm / min, the number of pulling is 15 times, and the pulling gap is 8 minutes. After drying in the air for 40 minutes, put it into a heat treatment furnace at a temperature of 140° C. and a heat treatment time of 80 minutes. The total irradiation amount of atomic oxygen reaches 5.4×10 20 / cm 2 Irradiation experiments show that the samples protected by the anti-atomic oxygen coating have no difference in the scanning electron microscope morphology before and after atomic oxygen irra...

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PUM

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Abstract

The invention provides a process for preparing atom oxygen resisting coating solution which comprises, mixing tetraethoxysilane, nano silicon oxide, nano aluminium oxide and silicane coupling agent (such as KH570) by a predetermined proportion, dissolving into ethanol solution, stirring with magnetic mixer, charging water and inorganic acid, finally stewing the obtained solution for 1 hr. The obtained solution can be used for making the surface covering for polyimides, which has atom oxygen resisting property, thus can be used for aircrafts in low orbit space.

Description

technical field [0001] Anti-atomic oxygen coating solution, anti-atomic oxygen coating preparation, anti-atomic oxygen protection for space low-orbit aircraft Background technique [0002] Most of the currently used space materials do not have the ability to resist the erosion of atomic oxygen. Applying a protective coating to the surface of a material is a convenient and effective way to improve its properties. However, there are strict requirements on the coating properties of space applications, including: (1) it can provide good resistance to atomic oxygen erosion and ultraviolet radiation, and the basic properties of the base material should not be changed; (2) it is thin and light and compatible with The matrix is ​​firmly bonded; (3) has no defects, pores and cracks; (4) has good resistance to bending and peeling; (5) can maintain stability when exposed to the low-Earth orbit space environment for a long time; (6) has very low Volatility and should meet the requirem...

Claims

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Application Information

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IPC IPC(8): C09D1/04C09D5/00
Inventor 罗仲宽刘剑洪洪伟良田德余
Owner SHENZHEN UNIV
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