A gradient atomic oxygen resistant biomimetic transparent polyimide composite film and a preparation method thereof

CN122103639APending Publication Date: 2026-05-29SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Filing Date
2026-04-02
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing transparent polyimide materials exhibit significant degradation in optical properties before and after atomic oxygen irradiation, affecting the operational lifespan and performance of spacecraft.

Method used

A gradient self-assembly technique of layered silicate nanosheets and transparent polyamic acid was adopted, drawing inspiration from the "brick-and-mortar" structure of mother-of-pearl and the gradient structure of insect elytra, to prepare a gradient atomic oxygen-resistant biomimetic transparent polyimide composite film. This film was prepared by coating with low, medium, and high concentrations of layered silicate nanosheet-transparent polyamic acid dispersions and thermal imidization treatment.

Benefits of technology

It significantly improves the strength, toughness, and flexibility of the material, while maintaining the stability of optical properties, enhancing its resistance to atomic oxygen, and extending the service life of spacecraft.

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Abstract

The application discloses a gradient atomic oxygen-resistant biomimetic transparent polyimide composite film and a preparation method thereof. The method comprises the following steps: S1, sequentially performing sanding treatment, micro-jet homogenization treatment and ultrasonic crushing treatment on a layered silicate to obtain a layered silicate nanosheet dispersion liquid; S2, mixing the layered silicate nanosheet dispersion liquid with a transparent polyamide acid solution to respectively prepare a low-concentration layered silicate nanosheet-transparent polyamide acid dispersion liquid, a medium-concentration layered silicate nanosheet-transparent polyamide acid dispersion liquid and a high-concentration layered silicate nanosheet-transparent polyamide acid dispersion liquid; and S3, coating the dispersion liquids on a glass substrate in the order of low to high concentration of the layered silicate nanosheets in the dispersion liquids to obtain the gradient atomic oxygen-resistant biomimetic transparent polyimide composite film. The gradient atomic oxygen-resistant biomimetic transparent polyimide composite film has better mechanical properties, atomic oxygen resistance and light transmittance stability before and after atomic oxygen treatment.
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