A sky-blue superhydrophobic coating and its applications

A new paper describes a colour coating with excellent self-cleaning, oil/water separation, and anti-corrosion properties.

The coating formed superhydrophobic surfaces in different types of substrates. Image source: MabelAmber - Pixabay (symbol image).

Efforts made to efficiently fabricate traditional superhydrophobic coatings have often faced limitations such as high cost, recontamination, and sophistication. An artificial superhydrophobic copper stearate (CS) polydimethylsiloxane (PDMS) coating was fabricated to achieve the transition of a water-adhesion surface to a water-repellent surface.

Superhydrophobic surfaces

The coating formed superhydrophobic surfaces in different types of substrates through dipping, spraying, and brushing, and demonstrated excellent water repellency, low contact angle hysteresis, and weak adhesive forces after exposure to tape-peeling cycles, abrasion cycles, acid/alkali solutions, corrosive solutions, freezing water, and boiling water. Additionally, experiments were conducted on potential applications of the superhydrophobic coating in oil/water separation, self-cleaning, and anti-corrosion.

The study has been published in Progress in Organic Coatings, Volume 147, October 2020.

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