热处理对桃花心木材尺寸稳定性和力学性能的影响  

Dimensional Stability and Mechanical Properties of Heat-treated Mahogany Wood

作　　者：周凡 付宗营 高鑫[1] 周永东[1] ZHOU Fan;FU Zong-ying;GAO Xin;ZHOU Yong-dong(Research Institution of Wood Industry,Chinese Academy of Forestry,Beijing 100091,China)

机构地区：[1]中国林科院木材工业研究所

出　　处：《木材工业》2019年第5期49-52,共4页China Wood Industry

基　　金：中央级公益性科研院所基本科研业务费专项“桃花心木和辐射松木材性质与加工技术研究”(CAFYBB2017ZC003);国家木竹产业技术创新战略联盟项目“桃花心木地板坯料尺寸稳定性及涂饰技术研究”(TIAWBI2018-06)

摘　　要：以温度150~210℃保温4 h、180℃保温2~6 h为条件,探究桃花心木材适用的热处理工艺。随着热处理温度升高和保温时间延长,试材平衡含水率和湿胀率逐渐降低,阻湿率和抗胀率增大;抗弯弹性模量在180℃以上时明显降低,抗弯强度随温度升高一直下降;随180℃保温时间的延长,抗弯弹性模量和抗弯强度先下降后趋于稳定。Mahogany wood samples were heat-treated at five temperatures ranged from 150 and 210℃for 4 hours,respectively.Another two groups of Mahogany wood samples were treated at 180℃for 2 and 6 hours,separately.The dimensional stability and mechanical properties of the samples were tested.The results showed that the equilibrium moisture content(EMC)and swelling values of the samples decreased while increasing treating temperatures and times.This trend led to the increase of the moisture excluding efficiency and anti-swelling efficiency of the wood.The modulus of elasticity(MOE)of the samples decreased significantly when the heating temperature was above 180℃.The modulus of rupture(MOR)of the samples decreased gradually with the increment of heating temperatures.The MOE and MOR of the samples treated at 180℃decreased gradually until reaching stable values when the treating time maintained from 2 hours to 6 hours.

关 键 词：桃花心木 热处理 平衡含水率 尺寸稳定性 力学性质 

分 类 号：S781.7[农业科学—木材科学与技术] S792.33[农业科学—林学]