高温干燥处理对桉树木材抗干缩性能的影响研究  

Effect of Drying Treatment on Anti-shrinkage Characteristics of Eucalyptus

作　　者：曹永建[1] 李兴伟[1] 王剑菁[1] 谢桂军[1] 

机构地区：[1]广东省林业科学研究院,广东广州510520

出　　处：《广东林业科技》2015年第2期78-83,共6页Forestry Science and Technology of Guangdong Province

基　　金：广东省林业科技创新专项资金项目"桉/竹基多功能复合新材料关键技术研究"(2011KJCX015-02);广东省科技计划项目"桉树热改性技术及阻燃性研究"(2012A020602012)

摘　　要：桉树是我国南方地区人工林主要造林树种之一,对缓解我国木材供需矛盾发挥着巨大作用。然而,桉树自身所具有的易开裂、变形等缺陷长期以来极大限度的限制了其高效利用。高温干燥处理是提高木材抗干缩性能的有效方法之一。为提高桉树木材的抗干缩特性,采用完全随机区组设计,测定尾叶桉(Eucalyptus urophylla)、尾巨桉(E.urophylla×E.grandis)和巨桉(E.grandis)木材在不同温度、不同时间高温干燥处理下的全干体积干缩率和气干体积干缩率。结果表明,在220℃、5 h的处理条件下,尾叶桉、尾巨桉和巨桉木材的抗干缩性能分别提高了68.24%,70.43%和76.37%。Eucalyptus is one of main commonly planted tree species in southern of China. As a fast-growing species, though it plays an important role to relieve the contradiction between supply and demand, the main drawback is dimensional stability, such as split and distortion, which limits its applications. Super-high drying treatment is one of the effective methods to enhance dimensional stability of wood. E. urophylla, E. urophylla Х E. grandis and E. grandis were treated at different temperatures and length of time in an airtight chamber. The effect of thermal treatment on anti-shrink efficiency of wood was investigated based on wood sample air-dry and absolute-dry volumes according to the method of Random Complete Block Design. The results showed that, under the treament condition of 220 ℃ and 5 h, the anti-shrink efficiency of E. urophylla, E. urophylla Х E. grandis and E. grandis woods was increased by 68.24%, 70.43% and 76.37%, respectively.

关 键 词：干燥处理 桉树 抗干缩率 

分 类 号：S781.62[农业科学—木材科学与技术]