Preparation of a SiO_x coating with a lot of micro–nanometre wrinkles on the polyimide surface and its resistance to corrosion

ABSTRACT

The preparation of inorganic coatings on polymer surfaces to improve their performance is a frequently used method. However, the cracking and falling off of the coatings caused by different thermal expansion coefficients or poor adhesion between the coatings and polymer substrates need to be solved. In this paper, the preparation of a SiO_x coating with a lot of micro–nanometre wrinkles is proposed, using the scalability of wrinkles to alleviate or eliminate the stress. The wrinkled coating is prepared on the polyimide surface by a sol forming process. Environmental simulation tests showed that the coatings exhibit resistance to moisture and temperature change, and have a good anti-atomic oxygen performance.

KEYWORDS:

• SiO_x coating
• polyimide
• adhesion
• wrinkles
• corrosion

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This study was supported by the National Natural Science Foundation of China [grant number 51573155]