[1]刘宏达,高建民*,陈瑶. 预热处理对改善尾巨桉木材干缩性和材色的研究[J].西北林学院学报,2014,29(05):176-180.[doi:doi:10.3969/j.issn.1001-7461.2014.05.33]
　LIU Hong-da,GAO Jian-min*,CHEN Yao. Effects of Pre-heat Treatment on Improving the Shrinkage and Color of Eucalyptus grandis×E. urophylla Wood[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2014,29(05):176-180.[doi:doi:10.3969/j.issn.1001-7461.2014.05.33]
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 预热处理对改善尾巨桉木材干缩性和材色的研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第29卷
期数:
2014年05期
页码:
176-180
栏目:
出版日期:
2014-09-30

文章信息/Info

Title:
 Effects of Pre-heat Treatment on Improving the Shrinkage and Color of Eucalyptus grandis×E. urophylla Wood
文章编号:
1001-7461(2014)05-0176-05
作者:
 刘宏达; 高建民*; 陈瑶
 （北京林业大学 材料科学与技术学院，北京 100083）
Author(s):
 LIU Hong-da;  GAO Jian-min*;  CHEN Yao
 (College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China)
关键词:
 ; 预热处理; 桉木; 干缩率; 颜色; 材性改良
Keywords:
 ; pre-heat treatment;  Eucalyptus urophydis;  shrinkage;  color;  wood property improving
分类号:
S782.31
DOI:
doi:10.3969/j.issn.1001-7461.2014.05.33
文献标志码:
A
摘要:
 为探讨预热处理对尾巨桉木材干缩性和材色的影响，分别在100℃饱和蒸汽和120℃过热蒸汽条件下对尾巨桉木材进行预热处理。对预热处理前后的尾巨桉木材进行干缩率及色度指数的测定，应用扫描电镜对预热处理后尾巨桉木材的微观构造进行分析。结果表明：1）100℃饱和蒸汽可以使尾巨桉的干缩性降低，材色无明显变化；120℃过热蒸汽处理使尾巨桉在干燥过程中出现较多缺陷，如皱缩、内裂等，但可以有效促使桉木颜色向珍贵树种颜色转变。2）经120℃过热蒸汽处理，尾巨桉木材导管中纹孔的内含物被部分排出，细胞被压扁，宏观尺寸发生变形，是导致尾巨桉出现干燥缺陷的主要原因。
Abstract:
 To investigate the effects of pre-heat treatment on the shrinkage properties and discoloration of Eucalyptus grandis×E. urophylla wood, the wood samples were pre-heated at 100 ℃ saturated steam and 120 ℃ overheated steam, respectively. The shrinkage ratio and color of the samples after pre-heat treatment were evaluated. The microscopic structure of the samples were analyzed using SEM. The results showed that: 1) the shrinkage ratio of Eucalyptus wood samples decreased after 100℃ saturated steam heat treatment, while no obvious discoloration was observed. However, excessive defects appeared during the wood drying process when the samples were subjected to pre-heat treatment under 120℃ overheated steam. Positive color changes could be observed after the wood samples pre-heated under 120℃ overheat steam. 2) Parts of the extractives of Eucalyptus were removed by pre-heat treatment, which led to discoloration of the wood samples. The cells were crushed, which resulted in the macroscopic dimension deformation and wood defects during the drying process.

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备注/Memo

备注/Memo:
 收稿日期：2014-01-13修回日期：2014-03-11
基金项目：国家自然科学基金项目“木材热诱发变色过程中发色体系形成的化学机理”(31070490)。
作者简介：刘宏达，女，硕士，研究方向：木材热诱发变色。E-mail:woodfight@sina.cn
*通信作者：高建民，男，博士，教授，研究方向：木材干燥。E-mail:jmgao@bjfu.edu.cn
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