Study of thermal fatigue on the cracking, adhesion and gloss properties of wood coatings

In this study, the effect of thermal cycle on surface degradation and crackability of wood coatings reinforced with clay nanoparticles and changes in adhesion and gloss properties were investigated. In this study, solvent-based coatings (alkyd, polyurethane), water-based coatings (chromium and phosphorescence) and oil-based coatings (oil-based coatings) were used in Abies alba wood species. Also, techniques and tests for measuring surface cracks, tensile adhesion and gloss meter were used to analyze the results before and after thermal fatigue. The results showed that the best coating performance in all three tests of tensile adhesion, surface gloss and surface crack is chrome coating and the most unsuitable of them is alkyd coating. Moreover, the results showed that the use of clay nanoparticles before the thermal cycle did not differ much in the properties of the coating, but after the thermal cycle increased the strength of the coatings. This increase in adhesion resistance in chromium, phosphorescence, oil, polyurethane and alkyd coatings was rate nearly doubled. In addition, the use of clay nanoparticles could reduce the crackability of the coating due to thermal fatigue and improve the performance of the coatings.