A novel self-wrinkled polyurethane-acrylate wood coating with self-matting, anti-fingerprint performance and skin-tactile feeling via excimer lamp/UV curing

Wrinkled surfaces exist widely in nature and organic living world, such as plants, insects, and skin. The optical, wettability and mechanical properties of materials can be enhanced by artificially preparing regular microstructure on the surface of materials. In this study, a novel self-wrinkled polyurethane-acrylate (PUA) wood coating with self-matting, anti-fingerprint performance and skin-tactile feeling curing by excimer lamp (EX) and ultraviolet (UV) was prepared. The wrinkles were formed on the surface of PUA coating at microscopic level after excimer and UV mercury lamp irradiation. The width and height of the wrinkles on the coating surface can be controlled to adjust the coating performance by changing the curing energy. When the PUA coating samples were cured by excimer lamp and UV mercury lamp with curing energy of 25-40 mJ cm(-2) and 250-350 mJ cm(-2), the excellent coating performances were observed. The gloss value of self-wrinkled PUA coating at 20 degrees and 60 degrees were less than 3 GU, while at 85 degrees was 6.5 GU, which satisfied the demanding of matting coating. Besides, the fingerprints on the coating samples could disappear in 30 s and could still have anti-fingerprint performance after 150 times of anti-fingerprint tests. Furthermore, the pencil hardness, abrasion quantity and adhesion of self-wrinkled PUA coating were 3H, 0.045 g and 0 grade respectively. Finally, the self-wrinkled PUA coating has excellent skin-tactile feeling for touching. The coating can be applied to wood substrates, and has potential application in the field of wood-based panels, furniture and leather.

Automated summary

In this study, a self-wrinkled polyurethane-acrylate (PUA) wood coating was prepared by excimer and UV mercury lamp irradiation, which showed self-matting, anti-fingerprint performance, and skin-tactile feeling. The coating exhibited excellent performance in terms of gloss, anti-fingerprint, hardness, abrasion resistance, and adhesion. Furthermore, it has potential applications in wood-based panels, furniture, and leather due to its excellent skin-tactile feeling.