20.500.12556/RUL-143952 Cellulose nano crystals (CNC) as additive for a bio-based waterborne acrylic wood coating decay, artificial weathering, physical and chemical tests Wood coatings prolong the service life of wood-based products, but they are usually of synthetic origin. The aim of the present article is to reduce the fossil-based compounds in a commercial waterborne acrylic coating by CNC addition and to test its performance. The coatings were applied on European beech and Norway spruce wood in order to test durability against Gloeophyllum trabeum (brown wood rot) and Trametes versicolor (white wood rot). Artificial weathering and blue stain, contact angle, physical tests (adhesion, impact and scratch test), chemical (FTIR) and morpho-anatomical analysis (SEM) were carried out. CNC addition increased viscosity, limiting the spreading of the coating into wood pores as visible after SEM observation, which reduced coating adhesion on the substrate. CNC improved fungal resistance as seen by a reduced mass loss and FTIR spectroscopy thanks to crosslinks formation, which reduced water sorption as well. Color change was not significant, and, on the other hand, glossiness was reduced but resulted as more homogeneous than control. CNC addition gave good results also in blue stain protection. CNC improved scratch resistance, but no visible change to impact was registered. CNC has promising results in coatings depending on wood and fungal species and presence of further commercial additives (biocides). beech spruce wood durability color gloss blue stain contact angle bukev smreka odpornost lesa Gloeophyllum trabeum Trametes versicolor barva sijaj glive modrivke FTIR kontaktni kot true false true Angleški jezik Slovenski jezik Članek v reviji 2023-01-23 13:37:33 2023-01-23 13:37:38 2023-01-27 03:35:30 0000-00-00 00:00:00 2023 0 0 24 str. iss. 3, article 442 Vol. 13 21. jan. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2023-01-21 630*8 2079-4991 10.3390/nano13030442 138974467 RAZ_Tamantini_Swati_2023.pdf RAZ_Tamantini_Swati_2023.pdf 1 DC6458F32F61D37E2C8BA84378373A96 43efd6838ee4ba86f22671e0b212316e9ceb2fe8a73879e4f11f17fa19759876 2c73f0ad-9b1b-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=166024 https://www.mdpi.com/2079-4991/13/3/442 1 773bfe70-9b1a-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=166023 Biotehniška fakulteta 0 0 0