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°) offers high impedance and remains intact after a 24 h salt spray test.