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A hybrid material resistant to atomic oxygen erosion in space environment and its preparation method

A hybrid material and space environment technology, applied in the direction of silicon oxide, silicon dioxide, etc., can solve the problems of loss of protective effect of coating, damage to spacecraft, and difficulty, and ensure dispersion and bonding, uniform dispersion, and easy control. Effect

Inactive Publication Date: 2016-06-08
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once these defects are formed, atomic oxygen will pass through these defects to react with the underlying material, forming undercutting, and eventually cause the coating to lose its protective effect or even fall off, thus bringing unexpected damage to the spacecraft
The protective layer of the spacecraft material treated by this method only exists within a certain thickness range on the surface of the material, and it will also fail if it is hit by micrometeorites and garbage debris
At the same time, it is still relatively difficult to use this method to deal with larger parts on the outer surface of the spacecraft.

Method used

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  • A hybrid material resistant to atomic oxygen erosion in space environment and its preparation method
  • A hybrid material resistant to atomic oxygen erosion in space environment and its preparation method
  • A hybrid material resistant to atomic oxygen erosion in space environment and its preparation method

Examples

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Effect test

Embodiment 1

[0093] see figure 1 , Polyimide resin (PMDA / ODA system) dosage ODA50 parts (by weight), PMDA55 parts, TEOS dosage 40 parts to prepare organic / inorganic hybrid materials resistant to atomic oxygen ablation.

[0094] The preparation method is as follows:

[0095] (A) Weigh polymer precursors ODA, PMDA and sol-gel precursor TEOS

[0096] Weigh according to ODA:PMDA:TEOS mass ratio=50:55:20 or 50:55:40 or 50:55:75 or 50:55:150;

[0097] (B) Prepare polyamic acid (PAA) solution

[0098] 50 parts of ODA, 500 parts of solvent DMAC, dissolve ODA into DMAC, stir and mix evenly to obtain ODA / DMAC solution;

[0099] Under stirring, add 55 parts of PMDA to the ODA / DMAC solution in 5 times, stirring for about 10 minutes each time to make it dissolve as completely as possible. After dissolution, the solution becomes a golden yellow viscous liquid. Continue stirring for 2 hours to make the solution Complete reaction (aging process) to obtain polyamic acid solution.

[0100] (C) Preparation of sol-gel p...

Embodiment 2

[0114] see figure 2 , Polyimide resin (PMDA / ODA system) dosage ODA50 parts (by weight), PMDA55 parts, TEOS dosage 40 parts to prepare organic / inorganic hybrid materials resistant to atomic oxygen ablation.

[0115] The preparation method is as follows:

[0116] (A) Weigh polymer precursors ODA, PMDA and sol-gel precursor TEOS

[0117] According to ODA:PMDA:TEOS mass ratio=50:55:40;

[0118] (B) Prepare polyamic acid (PAA) solution

[0119] 50 parts of ODA, 500 parts of solvent DMAC, dissolve ODA into DMAC, stir and mix evenly to obtain ODA / DMAC solution;

[0120] Under stirring, add 55 parts of PMDA to the ODA / DMAC solution in 5 times, stirring for about 10 minutes each time to make it dissolve as completely as possible. After dissolution, the solution becomes a golden yellow viscous liquid. Continue stirring for 2 hours to make the solution Complete reaction (aging process) to obtain polyamic acid solution.

[0121] (C) Preparation of sol-gel precursor solution

[0122] 40 parts of TEOS...

Embodiment 3

[0131] see image 3 , 100 parts of epoxy resin E51 (by weight) and 20 parts of TEOS are used to prepare organic / inorganic hybrid materials resistant to atomic oxygen ablation.

[0132] The preparation method is as follows:

[0133] (A) Weigh the polymer resin matrix and the sol-gel precursor TEOS

[0134] Weigh according to the mass ratio of polymer:sol-gel precursor=100:20;

[0135] (B) Preparation of sol-gel precursor solution

[0136] Put 20 parts of TEOS, 20 parts of water, 25 parts of ethanol or acetone into the reaction kettle and stir with a high-speed mixer (about 500 rpm) to make the system evenly mixed; during the stirring process, add dropwise dilute with a mass fraction of about 3.7% 0.2g hydrochloric acid solution is used as a catalyst to prepare a sol-gel precursor solution;

[0137] (C) Prepare polymer solution

[0138] Put 100 parts of epoxy resin E51, 50 parts of diluent acetone, and 65160 parts of curing agent polyamide PA into the reaction kettle, stir with a high-spee...

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Abstract

The invention relates to a hybrid material resistant to space environment atomic oxygen denudation. The hybrid material is composed of: (A) 100 parts of a polymer; (B) 20-150 parts of a sol-gel precursor; and (C) solvents, a curing agent and a catalyst of different dosages. The preparation method of the hybrid material resistant to space environment atomic oxygen denudation includes the following five steps of: 1. weighing the polymer and the sol-gel precursor according to the mass ratio; 2. preparing a sol-gel precursor solution; 3. preparing a polymer solution; 4. preparing a hybrid material solution resistant to space environment atomic oxygen denudation; and 5. preparing the hybrid material resistant to space environment atomic oxygen denudation. In the invention, by utilizing the hydrolysis-polycondensation reaction in a sol-gel process, an inorganic phase that does not react with atomic oxygen is generated in situ in the polymer, thereby obtaining the organic / inorganic hybrid material. With good atomic oxygen denudation resistance, the hybrid material well solves the problem that high polymer materials suffer from severe denudation by atomic oxygen.

Description

Technical field [0001] The invention relates to a hybrid material resistant to atomic oxygen erosion in a space environment and a preparation method. It is a novel organic / inorganic hybrid material resistant to atomic oxygen erosion and a polymer and polymer-based composite material for improving the resistance of spacecraft. The method of atomic oxygen ablation performance, specifically, refers to the in-situ generation of inorganic micro-nano phases that do not react with atomic oxygen through the sol-gel method in the polymer to improve the polymer and polymer-based composite materials used in spacecraft The resistance to atomic oxygen ablation. It belongs to the technical field of spacecraft material atomic oxygen protection. Background technique [0002] Polymer and polymer-based composite materials have excellent performance and are widely used in spacecraft. [0003] Low-Earth orbit is one of the main orbits of spacecraft, and atomic oxygen is the most abundant and active ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08L61/06C08L77/00C08L67/00C08L81/06C08L71/08C08L33/12C08K9/10C08K3/36C01B33/14
Inventor 赵小虎段凌泽张璐丹沈志刚蔡楚江
Owner BEIHANG UNIV
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