Characterisation of surfaces coated with different nanocellulose-based suspensions

Abstract

In this study, plywood surfaces were coated with different nanocellulose-based suspensions. Moreover, we analysed the effect of boric acid (BA), polyvinyl alcohol (PVA) and melamine formaldehyde (MF) on surface properties for some coating suspensions. According to the results, gloss values of plywood surfaces coated with nanocellulose-based suspensions changed depending on nanocellulose type, matrix type and number of coating layers. It was determined that coated plywood surfaces had low and medium gloss properties. When surface hardness values of coated plywood samples were analysed, it was observed that increasing the number of coating layers and addition of different kind of matrixes increased surface hardness values of the coated wooden surfaces up to the highest level (7H). Furthermore, it was determined that addition of BA, PVA and MF with various concentrations to nanocellulose-based suspensions declined water contact angles (WCA) of wooden surfaces coated with these solutions by reducing surface hydrophobicity.