热处理对表层压缩云南松木材性能的影响  

Effect of Heat Treatment on Properties of Surface-Densified Pinus yunnanensis Samples

作　　者：陈太安[1] 徐忠勇[1] 王昌命[1] 李涛[1] 陈立绵[1] 

机构地区：[1]西南林业大学材料工程学院,云南昆明650224

出　　处：《木材工业》2012年第5期45-48,共4页China Wood Industry

基　　金：云南省应用基础研究项目(2008cd137;2011FA021);国家自然科学基金(31000267)

摘　　要：为改善表层压缩材的尺寸稳定性,对表层压缩云南松木材进行热处理后,检测其24h吸水厚度膨胀率和变定回复率等尺寸稳定性指标,及其平衡含水率、材色、剖面密度分布、硬度、弹性模量和静曲强度等物理力学性能指标。结果表明,热处理可显著改善表层压缩材的尺寸稳定性,同时对材色、硬度和静曲强度等有较为显著的影响,而对剖面密度分布和弹性模量则无显著影响。Surface densification and post-heat treatment were used to improve the dimensional stability of Pinus yunnanensis samples. The process involved hot pressing for 10 minutes under 150℃ and then heat treatment for 2 hours under 180 ℃ or 220 ℃. The results showed that hot- pressing to densify the surfaces was an effective way to improve surface hardness and bending property of samples. Heat treatment for these surface densified sample could improve their dimensional stability considerably, such as, equilibrium moisture content, water absorption, thickness swelling, but decrease their modulus of rupture slightly.

关 键 词：表层压缩 热处理 云南松 性能 

分 类 号：S791.257[农业科学—林木遗传育种] S781.62[农业科学—林学]