热处理对尾赤桉木材物理力学性能的影响  

Effects of heat treatment on physical-mechanical properties of E.urophylla×E.camaldulensis

作　　者：廖立[1] 涂登云[1,2] 李重根[1] 周桥芳[1] 张少川[1] 吴向阳 

机构地区：[1]华南农业大学林学院,广东广州510642 [2]浙江世友木业有限公司研发中心,浙江湖州313009

出　　处：《中南林业科技大学学报》2013年第5期128-131,共4页Journal of Central South University of Forestry & Technology

基　　金：国家农业科技成果转化资金项目(2012GB2C200180)

摘　　要：采用185℃温度对尾赤桉木材进行了热处理研究,并对处理材和素材进行了物理、力学性能对比研究。结果表明:热处理提高了尾赤桉木材的尺寸稳定性,在环境温度30℃,相对湿度45%～90%变化范围内,处理材含水率的变化比素材降低了30.6%,顺纹、径向、弦向尺寸变化率分别减少了25.4%、25.2%、33.8%;处理后顺纹抗压强度降低了14.8%;径切面、弦切面、端面的硬度分别升高了33.1%、12.8%、1.4%;抗弯强度降低了43.8%;弹性模量增加了37.2%。The E.urophylla×E.camaldulensis were treated under 185℃ thermal surrounding,whose physical and mechanical properties were analyzed by contrasting before and after heating treatments.The results indicate that the heating treatments significantly promoted the dimensional stability of E.urophylla×E.camaldulensis;the moisture content heating-treated were reduced by 30.6%,the dimensional decrease rates of longitudinal,radial,tangential of the bamboo wood were respectively 25.4%,25.2%,33.8%,lower than the normal bamboo wood under the conditions of 30 ℃ and relative humidity 45%～90%.After being heat-treated,the compressive strength for parallel to grain direction decreased by 14.8%;the surface hardness of radial section,tangential section,and cross-section increased by 33.1%,12.8%,1.4% separately;the modulus of rupture(MOR) lessened by 43.8%;the modulus of elasticity(MOE) enchanced 37.2%.

关 键 词：尾赤桉木材 热处理 物理力学性能 

分 类 号：S792.39[农业科学—林木遗传育种]