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.
作者
卢翠香
蒋汇川
刘媛
周维
陆敏
陈健波
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)
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)。
关键词
热处理
低龄桉树木材
颜色变化
dry heat treatment
eucalyptus wood
color variance
