高温热处理低龄桉树木材力学性能分析  

Effects of Heat Treatment on Physical-mechanical Properties of Eucalyptus Wood

作　　者：卢翠香[1] 邓紫宇[1] 郭东强[1] 唐庆兰[1] 陆敏 任世奇[1] 李昌荣[1] 陈健波[1] LU Cuixiang;DENG Ziyu;GUO Dongqiang;TANG Qinglan;LU Min;REN Shiqi;LI Changrong;CHEN Jianbo(Guangxi Forest Research Institute/Key Laboratory of Central South Fast-Growing Timber Cultivation of Forestry Ministry of China/Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation Nanning 530002,Guangxi,China)

机构地区：[1]广西林业科学研究院/国家林业局中南速生材繁育实验室/广西优良用材林资源培育重点实验室

出　　处：《桉树科技》2019年第4期16-21,共6页Eucalypt Science & Technology

基　　金：广西科技重大专项(桂科AA17204087-6);广西林业科技项目(桂林科字〔2014〕第20号);广西重点研发计划(桂科AB16380036)

摘　　要：在水蒸气保护下,经不同温度(170、190、210℃)、不同恒温时间(2、3、4 h)、不同升温速度(10、15、20℃h^-1)、对低龄桉树木材进行高温热处理改性,按照GB/T1935-GB/T1936国家标准检测处理木材力学性能。结果表明:处理温度对桉树木材CS、MOR和MOE有极显著影响,恒温时间对MOE影响显著。随着处理温度的升高,CS、MOE先增加后减小,MOR逐渐减小;随着恒温时间延长,MOE、MOR逐渐增大,CS先减小后增加;随着升温速度增加,CS、MOE和MOR逐渐增大。处理材MOE高于对照样,CS和MOR略低于对照样。Samples of Eucalyptus wood were treated under three different temperatures(170,190,210℃),three heating rates(10,15,20℃·h^-1)and three different durations of constant temperature(2,3,4 h).The results showed that treatment temperature had a significant effect on CS,MOR and MOE,and treatment time had a significant effect on MOE.With the increase of treatment temperature,CS and MOE increased and then decreased whilst MOR decreased.With the extension of treatment time,MOE and MOR increased but CS decreased at first and then increased.With increased heating rates,CS,MOE and MOR increased.Under the same heat treatment temperature and constant temperature time,MOE was higher compared to before treatment whilst CS and MOR were lower.

关 键 词：桉树木材 高温热处理 顺纹抗压强度(CS) 抗弯弹性模量(MOE) 抗弯强度(MOR) 

分 类 号：S781.2[农业科学—木材科学与技术]