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采用热处理基材改性和紫外吸收剂涂层改性两种方法改善木材的光稳定性;并利用氙灯照射人工老化的方法,研究了龙脑香、樟子松、杉木3种木材热处理前后的光稳定性,分析了改性PU漆对热处理木材光变色的抑制作用。结果表明:在光老化过程中,热处理木材与素材间色值参数变化规律不同,而且热处理材的光稳定性明显高于素材。氙灯照射100 h后,龙脑香、樟子松和杉木热处理材色差较素材分别下降了38%、29%和59%,改性PU漆可以使木材色差降低14%~61%。3个树种中,龙脑香光稳定性最好,其次是杉木,樟子松最差。因此,户外漆的开发需要针对不同树种考虑不同热处理条件。
Two methods of heat treatment and UV absorber coating were used to improve the light stability of wood. The effects of artificial aging on xenon lamp irradiation were also studied. The effects of heat treatment on the wood quality of Rhizoma prednisolone, Pinus sylvestris var. Mongolica and Cunninghamia lanceolata Light stability, analysis of the modified PU paint heat treatment of wood photochromic inhibition. The results showed that during the photo-aging process, the color changing parameters of the heat-treated wood and the different materials were different, and the light stability of the heat-treated wood was obviously higher than that of the material. Xenon lamp irradiation 100 h, Dipterocarpaceae, Pinus sylvestris var. Mongolica and the heat treated wood color material decreased by 38%, 29% and 59%, respectively, modified PU paint can reduce wood color difference of 14% to 61%. Among the three tree species, Halobasia had the best light-stability, followed by Chinese fir and Pinus sylvestris. Therefore, the development of outdoor paint need to consider different tree species for different heat treatment conditions.