Fluorine-free superhydrophobic coating with mechanical interlocking and high corrosion resistance

Fluorine-free, low surface energy coatings are often combined with woven substrates to achieve superhydrophobicity for protection. In this work, laser etching, a green and efficient weaving method, has been employed to weave the Cu substrate. Plasma enhanced chemical vapor deposition (PECVD) has been applied to deposit a non-toxic, superhydrophobic polypropylene (PP) coating on the woven brass substrate (Cu '), enabling a substrate-coating structure with mechanical interlocking (Cu '/PP). The Cu '/PP with mechanical interlocking and superhydrophobicity (The contact angle of Cu '/PP is up to 150 +/- 0.6 degrees) offers high impedance and remains intact after a 24 h salt spray test.

Automated summary

In this study, laser etching technique was used to weave the copper substrate, while plasma enhanced chemical vapor deposition (PECVD) method was applied to deposit a superhydrophobic polypropylene (PP) coating on the woven brass substrate, creating a structure with mechanical interlocking and superhydrophobicity. The structure remained intact and showed high impedance after a 24-hour salt spray test.