Abstract
To prepare luminescent and superhydrophobic dual-functional coating materials, SrAl2O4:Eu2+, Dy3+ (SAOED) phosphors were modified with tetraethyl orthosilicate and (3-aminopropyl)trimethoxysilane for enhancing the water resistance and surface activity. Dual-functional coatings were fabricated by blending nanocellulose, 1,2,3,4-butanetetracarboxylic acid (BTCA), and modified SAOED phosphors on the poly(vinyl alcohol) pretreated surfaces of wood substrates using a two-step process combining spraying and chemical vapor deposition. The surface morphology, chemical structure, and mechanical properties of the hybrid coatings were characterized by SEM, energy dispersive X-ray analysis, FTIR, X-ray photoelectron spectroscopy, and abrasion tests. Incorporation of the modified SAOED particles and ONFC induced surface roughness on the wood surface with simultaneous afterglow luminescence and superhydrophobicity after low-energy modification. The water contact angle of the coating could go up to 153° and the slide angle was only 8.5°. The emission spectra for hybrid films showed a slight blue shift (2.8 nm) at around 512 nm compared to the SAOED particles. The obtained superhydrophobic wood materials with long afterglow luminescence can find application in interior decoration, intelligent ceilings, night indicators, or luminous logos and labels.
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