高温热处理对落叶松仿珍贵木材颜色变化的影响  

Effect of High Temperature Heat Treatment on Color Change of Imitate Precious Wood of Larch

作　　者：马伟[1] 强添纲[1] 郭明辉[1] 

机构地区：[1]生物质材料科学与技术教育部重点实验室(东北林业大学),哈尔滨150040

出　　处：《东北林业大学学报》2016年第12期37-41,共5页Journal of Northeast Forestry University

基　　金："十二五"国家科技支撑课题资助(2015BAD14B0501)

摘　　要：采用氮气作为保护气对落叶松进行高温热处理仿珍贵木材,研究了不同处理温度、处理时间对落叶松颜色变化的影响,分析了不同处理条件下落叶松仿珍贵木材颜色变化的机理,并得出仿珍贵木材相应的工艺参数。回归分析表明:随着处理温度的升高和时间的延长,饱和度差ΔC*明显降低,色差ΔE*及色相差ΔH*显著增加,说明热处理能有效地使木材颜色均匀加深,并达到仿珍贵木材的目的;相对于热处理时间,热处理温度对落叶松仿珍贵木材的影响更显著;木质素和抽提物随着处理时间和温度的变化发生一系列化学变化,是落叶松颜色改变的重要原因。利用此特性,对部分浅色人工林木材进行高温热处理,可使其趋近于珍贵材颜色,从而提高产品附加值。We studied the effect of different temperatures and time on the color changes of Larch treated by high temperature with using nitrogen as protective gas to imitate precious wood. Then, we analyzed the mechanism of the color changes of the Larch after high temperature heat treatment and the corresponding process parameters to imitate precious wood. With the in- crease of the induction temperature and the induction time, the saturation difference of wood was decreased significantly, chromatic aberration and color difference were increased significantly. The heat induction could enhance the color of wood. Relative to the heat induction time, the effect of heat induction temperature on the color changes of larch was more signifi- cant. A series of chemical changes occurred with the change of induction time and induction temperature which was an im- portant reason for the color changes of Larch induced by high temperature heat. The color change can be used to heat induced some kinds of light-colored artificial .wood to make them close to the color of the precious wood for increasing the added value.

关 键 词：落叶松 热处理 色差 木质素 抽提物 仿珍贵木材 

分 类 号：S781.7[农业科学—木材科学与技术]