ارزيابي ضريب نفوذپذيري گاز (هوا) و مايع در چوب تبريزي پوشش داده شده با رنگ هاي نيم پلي استر سيلر و كيلر و نانو ذرات

Gas and Water Permeability of Poplar Wood Coated with Sealer and Nitrocellulose Lacquer, Polyester Lacquer and Nano-particles

In this research, the effect of coating with sealer, nitrocellulose and polyester lacquers, nanozycosil and nanozycofil particles on mass transfer properties of wood was investigated. Tow types of transport processes in wood were studied: gas permeability and water permeability determined by Rilem test. The boards prepared from poplar sap wood were dried according to the schedule of T6E3. Then, cylindrical samples of 25 mm in diameter and 40 mm in length were longitudinally prepared. The lateral surfaces of the samples were coated using epoxy resin to confine fluid transfer along the longitudinally direction. Then, on of the end sections of the samples was coated by the coating materials. Some samples were dried in laboratory condition and the others in oven at temperature of 103-2 C. After equalizing of samples, their water and gas permeability coefficients were measured. A strong correlation was found between the water and gas permeability. The lowest gas and liquid permeability was related to the samples coated with sealer and nitrocellulose lacquer. Among nano particles, nanozycosil had better performance than nanozycofil to decrease the wood permeability Key words: Permeability, Polyester Lacquer, Sealer and Nitrocellulose Lacquer, Nano-Particles, Wood