高温热处理对低龄桉树木材颜色变化的影响  

Effects of High Temperature Heat-treatment on Color Variance in Young Eucalyptus Timber

作　　者：卢翠香[1] 蒋汇川 刘媛[1] 周维[1] 陆敏 陈健波[1] LU Cuixiang;JIANG Huichuan;LIU Yuan;ZHOU Wei;LU Min;CHEN Jianbo(Guangxi Forestry Research Institute,Key Laboratory of Central South Fast-growing Timber Cultivation of National Forestry and Grassland Administration,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和草原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,广西南宁530002

出　　处：《桉树科技》2021年第2期9-16,共8页Eucalypt Science & Technology

基　　金：广西优良用材林资源培育重点实验室开放课题“热改性桉木表面颜色调控工艺及机理研究”(2019-B-02-01);中央财政林业科技推广示范项目“桉树人工林可持续经营技术集成示范推广”([2019]TG 21号)。

摘　　要：以低龄桉树木材为研究对象,过热蒸汽为传热介质,在处理温度170、190、210℃,恒温时间2、3、4 h,升温速度10、15、20℃·h^(-1)的条件下对其进行高温热处理,研究桉树木材在不同热处理条件下的颜色变化。结果表明,随着处理温度升高、恒温时间延长、升温速度减慢,处理材的明度值L^(*)降低,红绿指数a^(*)提高,色相值DH^(*)和色差值△E有不同程度降低,黄蓝指数b^(*)和色饱和度C^(*)有不同程度的变化。处理温度对木材颜色指标有显著影响,3个因素对木材颜色影响程度依次为:处理温度>恒温时间>升温速度。Eucalyptus timber was heat treated to temperatures of 170℃,190℃or 210℃for durations of 2 h,3 h or 4 h,and subject to heating rates of 10℃·h^(-1),15℃·h^(-1) or 20℃·h^(-1) using superheated steam as the heating medium.The color variance after different heat treatment conditions was then evaluated.The results showed that as L^(*)、DH^(*)and△E decrease,a^(*)increases but b^(*)and C^(*)did not show significant changes,compared to untreated wood.The treatment temperature had a significant effect on subsequent wood color,and the order of the three factors on wood color was as follows:treatment temperature>constant temperature time>heating rate.

关 键 词：热处理 低龄桉树木材 颜色变化 

分 类 号：S781.69[农业科学—木材科学与技术]