Enhancing the self-cleaning properties and durability of BPH-8 organogel-based superhydrophobic coatings through the incorporation of fluorinated silica nanoparticles

Abstract

1,4-Bis[(3,4-bisoctyloxyphenyl)hydrazide]phenylene (BPH-8), a low molecular weight organogelator (LMOG), exhibits robust self-assembly properties in organic solvents, making it a promising candidate for superhydrophobic coatings in the realm of materials science. Nevertheless, these coatings suffer from challenges such as high rolling angles, strong liquid droplet adhesion, and poor long-term stability in water, leading to potential loss of their superhydrophobic characteristics. To address these issues, a strategic approach involving the incorporation of fluorinated silica nanoparticles (F-SiO₂) into BPH-8 organogels was implemented, resulting in the development of a composite F-SiO₂/BPH-8 organogel coating that demonstrates exceptional self-cleaning capabilities and durability. Superhydrophobic coatings were fabricated on various substrate surfaces using the drop casting method. The incorporation of F-SiO₂ into the coatings demonstrated a significant enhancement in both surface roughness and hydrophobicity. The resulting composite coating exhibited exceptional properties, including a contact angle of 170° and a rolling angle of 2°, indicating its highly water-repellent nature. Furthermore, the coating displayed remarkable self-cleaning abilities and exhibited excellent stability over time. The simplicity of the preparation method, its compatibility with diverse substrate materials, and its promising application prospects make it a favorable choice in the field of materials science.