热处理对华北落叶松人工林木材力学性能和颜色的影响研究  

Effect of thermal treatment on mechanical properties and colors of the wood of Larix principis-rupprechtii plantation

作　　者：王泽儒 马超 丁紫妍 鲍咏泽 WANG Zeru;MA Chao;DING Ziyan;BAO Yongze(College of Forestry,Hebei Agricultural University,Baoding 071000,China)

机构地区：[1]河北农业大学林学院,河北保定071000

出　　处：《林业与生态科学》2022年第4期403-407,417,共6页Forestry and Ecological Sciences

基　　金：河北农业大学引进人才项目(YJ201818)。

摘　　要：以华北落叶松人工林木材作为研究对象,采用热空气进行热处理,分析不同温度(140℃、160℃、180℃、200℃)对华北落叶松木材的力学性能和表面颜色的影响。研究结果表明,在力学性能方面,随着热处理温度的升高,华北落叶松人工林木材的抗弯弹性模量(MOE)和抗弯强度(MOR)均降低,热处理温度越高降幅越大;而顺纹抗压强度(CS)先升高后降低,且热处理温度对抗弯强度影响比抗弯弹性模量大。在表面颜色方面,热处理材的明度值L*、红绿轴色品指数a*和黄蓝轴色品指数b*均小于未处理材,且随着温度的升高呈逐渐降低趋势,热处理后木材表面颜色进一步变暗,随着热处理温度升高,色相差ΔH*和总体色差ΔE*增加且增幅逐渐增大,但饱和度差ΔC*降低。Effects of different temperatures(140℃,160℃,180℃,200℃)on the mechanical properties and surface color of Larix principis-rupprechtii plantation wood as research subject were analyzed by using hot air for heat treatment.The results indicated that modulus of elasticity(MOE)and modulus of rupture(MOR)gradually decreased with the increasing heat treatment temperature,while the compression strength(CS)increased and then decreased.Meanwhile,heat treatment had more effect on MOR than MOE.The lightness values L*,red-green color index a*and yellow-blue color index b*of thermally modified wood were lower than that for untreated wood.With the increase of heat treatment temperature,color differenceΔH*and overall color differenceΔE*increased and increased gradually,the saturation differenceΔC*decreased.

关 键 词：华北落叶松人工林木材 热处理 力学性能 木材颜色 

分 类 号：S791.229[农业科学—林木遗传育种]