عنوان مقاله [English]
Background and objectives: Wood is a natural material used in the construction of various wooden structures. Due to the presence of wooden structures in the outdoor, wooden structures are weathering and surface degradation. Regarding the use of wood as outdoor furniture, flooring, parquet and wooden houses, some properties such as hardness, scratch resistance and abrasion are important. In this study, the effect of accelerated weathering on the abrasion resistance of Populus nigra, Fagus orientalis and Quercus castaneifolia was studied.
Materials and methods: For this purpose, wood samples were cut to standard dimensions of 2×10×15 cm (L × R × T) and the surfaces of wood samples coated with linseed oil (100 mlm3) and for 2 weeks were kept in accelerated weathering. Then, by Taber test and Confocal laser microscope, the abrasion resistance and topography of the wood surfaces before and after weathering were investigated.
Results: The results of this study showed that, due to weathering, the wear resistance of all wooden species decreased and the more resistance among them was related to oak with the weight loss of 1.7 grams. Also, the results showed that the amount of abrasion index reduced by 28, 38 and 18 percent for poplar, beech and oak, respectively. The lowest and highest abrasion resistance after weathering was related to the poplar and oak and the results of the laser microscopy showed that, in the poplar, beech and oak the abrasion depth was 201, 183, and 136 (μ), respectively. The results also showed that, there was a significant difference between coated and uncoated samples.
Conclusion: The increase in oak wear resistance to other species can be due to higher specific gravity. In addition, the use of linseed oil coating reduces water absorption and, on the other hand, reduces friction and makes the surface of the wood lubricate. Also, the increase in weight loss after weathering is due to the higher absorption of uncoated samples than the coated samples, which causes faster and easier destruction of the wood structure. Based on the results of the laser microscope, the coating with linseed oil has been able to reduce the wear depth and reduce wear resistance. According to the results of this study, linseed oil can be used to increase the resistance of wood structures to abrasion.Based on the results of the laser microscope, the coating with linseed oil has been able to reduce the wear depth and reduce wear resistance. According to the results of this study, linseed oil can be used to increase the resistance of wood structures to abrasion.