Abstract
Surface treatment of wood is a way of improving its durability because it makes the surface waterprof. The present paper sets out to investigate the surface treatment of samples of pine (Pinus Ilhote) by means of a natural gas plasma at low pressure.The treatments were administered at 125°C for 2.0 h. The samples were characterized by SEM, angle of contact (water drop versus polymerized surface) and absorption of humidity. Results indicate that there was the formation of a hydrophobic polymer film with 2,0 μm thickness. The angles of contact of a water drop on the surface sample that has undergone treatment reaches values of approximately 90°. As for the samples that have not been treated, the angle of contact can not be measured because the drop spreads on the wooden surface instantaneously. It is possible to observe that the polymer film is continuous and contributes to close the natural porosity of wood. The rate of water absorption was reduced by up to 50% in the samples that have undergone plasma treatment.
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