| Abstract: | Hot water droplet and oils induced air cushion failure,intensively used fluorine-containing chemicals,tedious preparation process,etc.are the main bottlenecks of the current artificially fabricated superhydrophobic materials,restricting their large-scale production and real-world applications.Herein,a facile,scalable,fluorine-free spray-coating strategy was employed to achieve superhydrophobic and superoleophobic polymerized organosilanes/Al2O3 nanoparticles (POS/Al2O3 NPs) coatings.The POS/Al2O3 NPs coating was achieved through hydrolytic condensation of tetraethyl orthoilicate (TEOS) and hexadecyltrimethoxysilane (HDTMS) in the presence of Al2O3 NPs.A variety of analytical techniques including scanning electron microscopy (SEM),X-ray photoelectron spectroscopy (XPS),energy dispersive X-ray photoelectron spectroscopy (EDS) were used to investigate the fabricated coatings.The POS/Al2O3 NPs coating features high contact angle (＞158°) and low sliding angle (＜5°) for water,glycerol,and ethylene glycol droplets with different surface tensions,verifying both superhydrophobic and superoleophobic properties.Moreover,the coatings present extremely low surface adhesion force,excellent liquid-driven self-cleaning ability,and hot water repellency.The superamphiphobic POS/Al2O3 NPs coating exhibits promising applications in various fields including self-cleaning,corrosion resistance,and preventing scald as this strategy is applicable on various substrates. |
