Superhydrophobic surface with enhanced weather resistance

Researchers have proposed a cerium oxide-based superhydrophobic surface with enhanced weather resistance and self-recovery.

An illuminated city scene in the rain as a symbolic image.
The superhydrophobic coating may have a wide range of energy and environmental applications.  Image source: AveCalvar - Pixabay (symbol image).

For a superhydrophobic coating, its limited durability has been a persistent issue that often prevents its widespread usage in outdoor applications. Now scientists have proposed a scalable, self-recoverable CeO2/PDMS hybrid coating that harnesses synergetic benefits from hydrocarbon adsorption of rare earth oxides and hydrocarbon supply by a hydrocarbon-based polymer. It was demonstrated that this hybrid coating substantially outperforms other superhydrophobic surfaces in self-recovery of superhydrophobicity and weather resistance.

Wide range of energy and environmental applications

The synergetic effect expedites the recovery of superhydrophobicity via a facilitated hydrocarbon adsorption: e.g., the self-recovery time of the coating was over 30 times less than that with CeO2 nanoparticle-based coating after plasma treatment. Furthermore, the coating showed excellent weather resistance by (1) sustaining superhydrophobicity over 1 year without any deterioration in the outdoor environment and (2) surviving accelerated weathering tests.

Finally, the coating was successfully applied to outdoor electrical insulators, while exhibiting excellent self-recovery performance of superhydrophobicity even after exposure to 600 V of electrical stress in presence of conductive water droplets. The researchers believe that the coating provides robust superhydrophobicity via a rapid self-recovery performance and can be applied to any type of substrates with complex geometry by a one-step spraying process, both of which would be crucial to the application of the superhydrophobic coating in a wide range of energy and environmental applications.

The study has been published in Progress in Organic Coatings, Volume 170, September 2022.

Hersteller zu diesem Thema

This could also be interesting for you!