Exploring polyamide 11 as a novel renewable resource-based filler in wood paint: Investigating aesthetic aspects and durability impact of the composite coating

The aim of this study is to assess the impact of different quantities of polyamide 11 powder on the visual appeal, durability, and multi-functionality of a water-based wood paint. To investigate the effect of this bio-based additive on the overall appearance of the coatings, measurements for color, gloss, and surface roughness were conducted. Additionally, various tests were performed to quantify the influence of these environmentally friendly additives on the mechanical properties of the coatings, including hardness, surface friction coefficient, and resistance to abrasion. Moreover, the effect of varying amounts of polyamide 11 powder on the coating’s barrier capabilities was evaluated through liquid resistance tests, contact angle measurements, and water uptake assessment. Finally, the influence of the bio-based additive on the layers’ durability was evaluated by subjecting them to exposure in a xenon arc light chamber. The degradation of the samples was monitored through colorimetric inspections to assess any changes or deterioration. In summary, this study underscores the significant impact of varying the quantity of polyamide 11 powder, showcasing its ability to not only introduce distinct texture to the paint but also significantly enhance the mechanical properties of the composite layer. Importantly, these improvements are achieved without compromising the barrier properties and durability of the acrylic matrix coating.