Progress in fabrication of biomimetic superhydrophobic surfaces by laser etching

Superhydrophobic surfaces have gained wide attention due to their good properties such as slip resistance, corrosion resistance, and anti-friction. Superhydrophobic surfaces etched by laser have advantages of controllability, simplicity, stability, environmental protection, etc. It is expected to achieve industrial production. Firstly, theoretical models and influencing factors of superhydrophobic surfaces are reviewed. Also, the methods of laser etching superhydrophobic surfaces at home and abroad are summarized. The advantages and disadvantages of femtosecond, picosecond and nanosecond lasers for superhydrophobic surfaces are discussed. Finally, the prospect of laser etching superhydrophobic surface technology is put forward. Future research should insist on reducing the production cost, reducing the process steps, improving production efficiency, saving energy and keeping environmental protection, etc. It is important to improve the stability and durability of surface microstructure. Superhydrophobic surfaces will move towards multi-functionality and intelligence.