Development of fluorine-free fluorescent coatings with carbon dots and silica for superhydrophobic aluminum alloy surfaces

• DOI: 10.1088/1402-4896/adb45e
• Publication Date: 2025-02-10T22:53:15Z
• Authors: Huaqiao Peng; Wenyan Li; Xueqi Liu; Tao Li; Xiwen Liu; Zhi Li; Yourui Liu; Tao Shi
• Keywords: Fluorine; Carbon fibers

Abstract Superhydrophobic surfaces attract increasing attention, and they have been widely studied because of their excellent anti-icing, anti-corrosion, self-cleaning, oil-water separation properties. In this study, a robust hierarchical structure was prepared on an Al-alloy substrate by spraying mixture epoxy resin (EP), hydrophobic SiO2, styrene-ethylene-butyrene-styrene (SEBS) to realize superhydrophobicity. addition, carbon dots (CDs) with fluorescence were incorporated detect micro-coating damage in practical applications. The as-prepared superhydrophobic surface EP-Si@CDs exhibited high water contact angle ~165.2° low sliding ~7.6°, addition good non-wettabilities toward common liquid droplets. characterized using scanning electron laser confocal microscopy, energy-dispersive X-ray photoelectron spectroscopy investigate its chemical composition. Meanwhile, displayed durability, the remaining at >150° <10° after dragging for 280 cm under mass 100 g. Owing incorporation CDs, emitted bright yellow ultraviolet light, which could be used micro damage. anti-icing self-cleaning performances, related mechanisms investigated detail.