20.500.12556/RUL-173363 Application and characterization of poly(vinyl alcohol) reinforced with cellulose nanofibrils as a coating for wood Water solutions of poly(vinyl alcohol) (PVA) at concentrations of 10%, 15%, and 20% were tested as alternatives to traditional wood coatings, with cellulose nanofibrils (CNFs) added to improve their mechanical and physical properties. The indentation hardness of PVA films decreased with higher PVA concentrations but was enhanced by the addition of CNFs. The coatings showed good wood wetting, with contact angles between 51° and 93°. Scanning electron microscopy revealed that the coatings penetrated 100–200 µm into the European beech (Fagus sylvatica L.) wood, anchoring well within its cellular structure. The coatings reduced wood surface roughness and altered its color (ΔE* ≤ 11.9), while remaining transparent (pure PVA) or semi-transparent (PVA + CNFs). Pure PVA coatings increased the wood gloss by 16 times. All PVA-based coatings made the wood surface more hydrophobic, although hydrolysis of the films was observed. The coatings' elasticity enhanced the resistance to micro-scratching. Photostability tests showed that most color changes were due to chemical alterations in the wood surface. CNFs also exhibited ultraviolet light-blocking properties. The coatings demonstrated excellent adhesion to the wood surface, with pull-off strengths greater than 5 MPa. These results suggest that PVA + CNFs coatings are promising for use as protective treatments for wood, offering improvements in both appearance and durability. biocomposite cellulose nanofibrils coating poly(vinyl alcohol) surface beech wood biokompoziti celulozne nanofibrile premazi polivinil alkohol površina les bukev true false true Angleški jezik Slovenski jezik Članek v reviji 2025-09-17 04:40:43 2025-09-17 10:38:42 2026-06-08 16:01:15 0000-00-00 00:00:00 2025 0 0 Str. 6229–6252 iss. 10 Vol. 32 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*8 1572-882X 10.1007/s10570-025-06606-8 239962627 RAZ_Zigon_Jure_2025.pdf RAZ_Zigon_Jure_2025.pdf 1 13348DF9E708CA8E12E52489DD40181A 4ef6326df5db97e74a995aa02e11106ca7ccb4d7e296aa5353c498318bb762e8 4f3f42c2-9384-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=217770 https://link.springer.com/article/10.1007/s10570-025-06606-8 1 8c749d4e-936f-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=217769 Biotehniška fakulteta 0 0 0