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Composite protection coating for atomic oxygen

A protective coating and composite atom technology, which is applied in the aerospace field, can solve problems such as cracks and micropores, achieve the effect of improving atomic oxygen resistance and reducing coating defects

Inactive Publication Date: 2017-02-15
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] According to the analysis, the coatings currently used for atomic oxygen protection are mainly single-layer structures. Due to technical limitations, defects such as cracks and micropores are unavoidable during the preparation of coatings.

Method used

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  • Composite protection coating for atomic oxygen

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Experimental program
Comparison scheme
Effect test

Embodiment 2

[0034] The spraying device used in embodiment 2 is the PVA350 precision coating device of American Asymtek company.

[0035] The TEGO450 in the embodiment is the leveling agent of the TEGO450 type produced by German Tego Company.

Embodiment 1

[0037] (1) PHPS, N, N-dimethyl glycol amine, dibutyl ether, fumed silica, TEGO450 were respectively 3wt.%, 0.05wt.%, 96.3495wt.%, 0.6wt.%, 0.0005 The content of wt.% is made into a silicon-containing solution composition.

[0038] (2) The polyimide film organic base material 1 was cleaned with alcohol, and the silicon-containing solution composition was brushed on the polyimide film organic base material 1 with a soft brush to prepare a sample.

[0039] (3) After the solvent is volatilized, the sample is transferred to a constant temperature and humidity box for curing. The temperature is 250°C, the humidity is 90%, and the curing time is 4 hours. After curing, a PHPS transition layer with a thickness of 100nm is obtained. 2 samples;

[0040] (4) The sample prepared in (3) is placed in the reaction chamber of the plasma polymerization equipment, and the reaction chamber is evacuated to 5 × 10 -3 Pa;

[0041] (5) Use the heating device of the plasma polymerization equipment ...

Embodiment 3

[0053] (1) PHPS, N, N-dimethyl glycol amine, dibutyl ether, fumed silica, TEGO450 were respectively 10wt.%, 0.06wt.%, 88.448wt.%, 1.49wt.%, 0.002 The content of wt.% is made into a silicon-containing solution composition.

[0054] (2) The polyimide film organic base material 1 is cleaned with alcohol, and the silicon-containing solution composition is coated on the polyimide film organic base material 1 to prepare a sample, and the coating method adopts scraping coating , The slit is adjusted to 2 microns when scraping.

[0055] (3) After the solvent evaporates, transfer the sample to a constant temperature and humidity chamber, and adopt the following curing procedure:

[0056] step temperature(℃) humidity(%) time (h) 1 100 90 3 2 130 80 2 3 160 70 2 4 190 60 3 5 210 50 1

[0057] After curing, a sample with a PHPS transition layer 2 with a thickness of 150 nm was prepared;

[0058] (4) The sample prepared in (3) is pl...

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Abstract

The invention relates to a composite protection coating for atomic oxygen, and belongs to the technical field of aerospace. The coating is characterized in that the coating comprises a PHPS transition layer and a siloxane protection coating for atomic oxygen. The PHPS transition layer is attached to the surface of an organic substrate material, and the thickness is 100-300nm; the siloxane protection coating for atomic oxygen is attached to the PHPS transition layer, and the thickness is 200-500nm. The PHPS transition layer is prepared by a liquid phase chemical film preparation method, and the siloxane protection coating for atomic oxygen is prepared by using chemical vapor deposition technology. After the PHPS transition layer is added, the adhesive force of the siloxane protection coating for atomic oxygen is greatly improved, and defects of the coating are effectively reduced; the atomic oxygen resistance of the organic substrate material is substantially improved. The coating can be applied to atomic oxygen protection of surfaces of polyimide, polyester film materials and other organic substrate materials, coating binding force is improved, defects are reduced, and atomic oxygen resistance of the coating is substantially improved.

Description

technical field [0001] The invention relates to a composite atomic oxygen protective coating, which belongs to the technical field of aerospace. Background technique [0002] Atomic oxygen has a relatively high concentration in low earth orbit (LEO), and the relative kinetic energy of collision with the surface of the spacecraft is also as high as 5eV, and because the chemical properties of atomic oxygen are very active, it is a very strong oxidant, which will damage the outer materials of the spacecraft. Performance is severely impacted. The most important and dangerous environmental factor in LEO orbit is atomic oxygen. Atomic oxygen has serious denudation and damage to spacecraft materials exposed outside the cabin for a long time, and will cause quality loss, performance degradation and even failure of various space materials. [0003] Therefore, it is necessary to take atomic oxygen protection measures for the extravehicular materials of low earth orbit spacecraft. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C09D183/16C09D7/12C08L79/08C08L67/00
CPCC08J7/0427C08J2367/00C08J2379/08C08K3/36C09D183/16
Inventor 赵琳李中华杨生胜马亚莉
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH