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A kind of polyimide composite film with anti-atomic oxygen on one side and preparation method thereof

A technology of polyimide base film and anti-atomic oxygen, which is applied in the direction of chemical instruments and methods, synthetic resin layered products, lamination, etc. Poor performance and other problems, to achieve the effect of excellent anti-atomic oxygen performance, good mechanical properties, and excellent mechanical properties

Active Publication Date: 2017-09-29
CHINA ACADEMY OF SPACE TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the LEO space environment of the spacecraft, the parts exposed in space, such as parts that do not need light transmission, can be protected from atomic oxygen by coating a layer of metal film on its surface, but for parts that need light transmission, such as Solar panels are generally coated with a layer of polyimide base film on its surface, but the anti-atomic oxygen performance is not good, which directly affects the life of the solar panel. In order to solve this problem, it can be coated on the polyimide base film Evaporate a layer of silicon dioxide film, but the interface compatibility between the silicon dioxide film and the polyimide-based film is poor, and it is easy to fall off; it is also possible to dope nanometer silicon dioxide into the polyimide-based film, However, the mechanical properties of the obtained composite film are poor, which greatly limits its use.

Method used

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  • A kind of polyimide composite film with anti-atomic oxygen on one side and preparation method thereof
  • A kind of polyimide composite film with anti-atomic oxygen on one side and preparation method thereof
  • A kind of polyimide composite film with anti-atomic oxygen on one side and preparation method thereof

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preparation example Construction

[0050] (3) Preparation of silica airgel film: adopt dipping and pulling method to prepare silica airgel film, the specific steps are: pour the silica sol obtained in step (2) into a container, and quickly pour the silica sol obtained in step (2) (1) Insert the obtained substrate vertically into the silica sol in the container, and lightly press the top of the substrate with your hands to keep it fixed, while keeping the silica sol flowing out at a speed of 5-30cm / min, After the silica sol has flowed out, take out the substrate and quickly immerse it in an anhydrous ethanol solution for aging and then take it out, repeat the immersion-out process three times, immerse for 6-24h each time, and then use n-hexane for solvent exchange, solvent exchange 12-24h, so that all the water and absolute ethanol in the silica airgel film are replaced by n-hexane to obtain the silica airgel film.

[0051] The surface modification method of described silica airgel film is:

[0052] (1) Soak th...

Embodiment 1

[0072] A polyimide composite film with single-sided anti-atom oxygen, the composite film includes two layers, the upper layer is a composite material layer, the lower layer is a polyimide base film layer, the composite material layer includes a polyimide matrix and Surface-modified silica airgel film;

[0073] The preparation method of described silica airgel film is:

[0074] (1) The surface of the glass substrate is ultrasonically cleaned and then dried; the cleaning steps are: first use acetone to ultrasonically clean, then use anhydrous ethanol to ultrasonically clean, and finally use distilled water to ultrasonically clean; the substrate used must be strictly treated before it can be used Carry out dipping and pulling operation, which is mainly to remove pollutants such as dust adhered to the surface, and ensure the uniformity of the prepared airgel film; (2) preparation of silica sol: adopt acid / alkali two-step catalytic process To prepare silica sol, the specific steps...

Embodiment 2

[0090] A polyimide composite film with single-sided anti-atom oxygen, the composite film includes two layers, the upper layer is a composite material layer, the lower layer is a polyimide base film layer, the composite material layer includes a polyimide matrix and Surface-modified silica airgel film;

[0091] The preparation method of described silica airgel film is:

[0092] (1) The surface of the glass substrate is ultrasonically cleaned and then dried; the cleaning steps are: first use acetone to ultrasonically clean, then use anhydrous ethanol to ultrasonically clean, and finally use distilled water to ultrasonically clean; the substrate used must be strictly treated before it can be used Carry out dipping and pulling operation, which is mainly to remove pollutants such as dust adhered to the surface, and ensure the uniformity of the prepared airgel film; (2) preparation of silica sol: adopt acid / alkali two-step catalytic process To prepare silica sol, the specific steps...

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Abstract

The invention relates to a one-side atomic oxygen resistant polyimide composite film and a preparation method thereof. The film is mainly applied to a spacecraft in space flight. The invention specifically relates to an aerogel-containing atomic oxygen resistant polyimide film for spacecrafts and a preparation method thereof, and belongs to the technical field of aerospace material application. The composite film comprises upper and lower layers: the upper layer is a composite material layer, and the lower layer is a polyimide base film. The composite material layer contains a polyimide base film and an aerosil film obtained after surface modification. One side of the film prepared by the method is pure polyimide, and the other side is a high-concentration aerosil-containing polyimide double-layer composite film. The film thickness is 30-130 microns. The double-layer film has excellent atomic oxygen resistance and good mechanical property, can effectively resist high and low temperature impact and can meet requirement on high-performance atomic oxygen resistant films in the aerospace field.

Description

technical field [0001] The invention relates to a polyimide composite film with single-sided anti-atomic oxygen and a preparation method thereof, which is mainly applied to spacecraft in spaceflight, and more precisely relates to an aerogel anti-atomic oxygen for a spacecraft A polyimide film and a preparation method thereof belong to the technical field of aerospace material application. Background technique [0002] There is a large amount of atomic oxygen in space, especially in the space environment of low earth orbit (LEO). The high energy of atomic oxygen itself will cause the erosion of polymer materials on the aircraft, resulting in the degradation of its performance. On the other hand, the denudation products of polymers may also cause secondary pollution to the surface of spacecraft, optical components, thermal control coatings and solar panels. In recent years, the research on the atomic oxygen effect of polymer materials has received more and more attention. It ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/28B32B9/00B32B9/04B32B33/00B32B38/08B32B38/16B32B38/00B32B38/10C08G73/10
CPCB32B9/00B32B9/04B32B27/281B32B33/00B32B38/0036B32B38/08B32B38/10B32B38/162B32B38/164B32B2038/0052B32B2255/26B32B2307/30B32B2307/302B32B2307/50C08G73/105C08G73/1071
Inventor 高鸿张静静邢焰刘泊天王永建王向轲于翔天
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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