Contributions of Extractives and Lignin to the Fractal Geometry of Internal Wood Surfaces

编号 zgly0000304651

文献类型 期刊论文

文献题名 Contributions of Extractives and Lignin to the Fractal Geometry of Internal Wood Surfaces

学科分类 220.5570;林产化学加工学

作者 JinzhenCao  LuNing  ZhaoGuangjie 

作者单位 CollegeofMaterialScienceandTechnology 

母体文献 Forestry Studies in China;中国林学: 英文版 

年卷期 2003,5(1)

页码 39-43

年份 2003 

分类号 TQ351.377 

关键词 木材表面  吸附等温线  苯-酒精萃取体系  木质素  得率  分形几何  分形维数 

文摘内容 Internal wood surfaces can be treated as fractals,which are between Euclidean geometry and complete randomness.The fractal dimension Dfs is very informative in investigating the roughness of the internal surfaces of wood.In this study,the water sorption isotherms,including adsorption and desorption isotherm,of untreated,benzene-alcohol extracted and delignified (after benzene-alcohol extracted)spruce(Cuninghamia lanceolata) were measured at 30℃ .On the basis of these isotherms,the Dfs values were calculated by FHH equation,which is based on multimolecular sorption.The results showed that both groups of Dfs values(respectively calculated from adsorption and desorption isotherms)of untreated,benzene-alcohol extracted and delignified wood have same order,that is ,untreated>benzene-alcohol extracted≈delignified.Therefore,the conclusion can be made that the benzene-alcohol extractives have significant contribution to the fractal geometry of internal wood surfaces.Lignin also has influence on the fractal geometry,but this influence is very small while compared with that of the extractives.Moreover,the Dfs values calculated from adsorption isotherms are bigger than those from desorption isotherms。