酸性染料在桦木中的渗透与吸附  

Permeability and Adsorption of Acid Dyes in Birch Wood

作　　者：韦双颖[1] 王砥[1] 顾继友[1] 

机构地区：[1]东北林业大学,哈尔滨150040

出　　处：《东北林业大学学报》2008年第3期45-48,共4页Journal of Northeast Forestry University

基　　金：东北林业大学青年科研基金资助

摘　　要：采用扫描电镜和傅立叶变换红外光谱分析手段研究了木材染色过程中染料在桦木中的渗透与附着过程:当染料质量分数较高时,在放大1 500倍的SEM照片中观察到大量染料分子发生聚集,较多地吸附在单板表层;而当染料质量分数较低时,则观察不到染料分子。这种情况同时发生在单板芯层。在试验中,用肉眼观察到的颜色变化证明了单板已经吸附了染料分子。通过对染色过程中酸性橙Ⅱ的脱附和FTIR谱图分析可以推断,酸性橙Ⅱ与桦木的结合是以物理吸附为主,但这种吸附力较弱,染料较易流失。Scanning Electron Microscope （ SEM ） and FTIR analysis method were used to study the permeability and absorption of dyes in wood dyeing process. Under the condition of higher concentrations of dye solution, a great deal of dye molecules gathered and mostly attached on the surface of veneer were observed through enlarged SEM photos （ 1 500×）. While under the condition of lower concentrations, dye molecules could not be observed. The same phenomenon oecurred in the core veneer. Color change in the course of experiment testified that veneer surface had adsorbed dye molecules. Acid Orange Ⅱ desorption and FTIR analysis in the eottrse of dyeing show that it is primarily physical adsorption between Acid Orange Ⅱ and birch wood, and the physical adsorptive force is weak, so dyes flow away easily.

关 键 词：掉木 染色 渗透性 吸附 扫描电镜 红外光谱 

分 类 号：S781[农业科学—木材科学与技术]