Enhancing wood coatings with red beetroot-derived pigments: Investigating synergy with UV absorber and composite filler for improved durability and aesthetics

The objective of this study is to assess the synergy among a specific bio-based pigment derived from red beetroot, a composite filler, and a UV absorber as additives for wood paints. The composite filler aims to enhance the mechanical properties of the coating, while the UV absorber is selected to improve the pigment’s color stability under solar radiation. The impact of these dditives on sample aesthetics is evaluated through color, gloss, and roughness measurements. Mechanical properties are analyzed using Buchholz surface hardness and Taber abrasion resistance tests. The protective role of the UV absorber is further examined hrough accelerated degradation tests in a UV-B chamber. To ensure that the additives do not compromise the coating’s barrier properties, water uptake tests, resistance to liquids, and contact angle measurements are conducted. Overall, the study emonstrates how each additive serves a distinct purpose and their combined application offers benefits such as enhanced color etention and improved mechanical durability of the coating. It highlights the potential of using bio-based pigments to enhance olor durability without sacrificing the protective performance of wood coatings.