Efficient synthesis of durable superhydrophobic SiO2@PFDMS coatings on bamboo by liquid deposition

Fast-growing bamboo offers a sustainable alternative to meet the increasing demand for wood. However, its inherent hydrophilicity limits its performance, necessitating hydrophobic modifications to enhance longevity. In this study, 1 H,1 H,2 H,2 H- perfluorodecyltrimethoxysilane was used to anchor SiO 2 nanoparticles onto bamboo surface, creating superhydrophobic coatings . The nanoparticles constructed a micro-/nano-rough structure on the bamboo surface, and fluorosilanes significantly reduced the surface energy of bamboo. The wettability , micro-morphology, chemical composition, and resistance to acid and alkali corrosion, mechanical abrasion, and UV aging of the superhydrophobic coatings were extensively investigated. The results demonstrated that the modified bamboo achieved a surface energy of 0.2±0.0 J/m 2 and a water contact angle of 156.8±0.2°. Furthermore, the coating exhibited excellent chemical and physical stability. This straightforward and effective surface treatment method offers substantial potential for broadening bamboo's applications in outdoor environments . • Superhydrophobic bamboo is prepared by simple immersion method using SiO 2 NPs and PFDMS. • The coatings to repel water as well as other low surface tension liquids. • Coated bamboo shows the excellent stain resistance property and self-cleaning ability. • Coated bamboo shows good mechanical and chemical stability.