文献类型：期刊文献

英文题名：STUDY ON COLOR AND SURFACE CHEMICAL PROPERTIES OF EUCALYPTUS PELLITA WOOD SUBJECTED TO THERMO-VACUUM TREATMENT

作者：Sun, Bailing[1] Wang, Zhe[1] Liu, Junliang[1]

第一作者：孙柏玲

通信作者：Liu, JL[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China

年份：2019

卷号：64

期号：1

起止页码：1-12

外文期刊名：WOOD RESEARCH

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000460515100001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 31370558).

语种：英文

外文关键词：Eucalyptus pellita; thermo-vacuum treatment; color; surface chemical properties

摘要：The objective of this study was to investigate the color and surface chemical properties of Eucalyptus pellita wood subjected to thermo-vacuum treatment. Specimens were thermally modified in a vacuum at various temperatures for 4 h. The color parameters of untreated and heat-treated samples were measured using the CIE Lab method. Surface chemical properties were evaluated by UV-Vis spectroscopy, C-13 NMR spectroscopy and X-ray photoelectron spectroscopy. The results showed that eucalypt wood became darker uniformly throughout with the increase of treatment temperature, and the total color variation Delta E* obviously increased at higher temperature. The spectral changes indicated that degradation and oxidation of hemicellulose, lignin and extractives contributed to the formation of color substances during thermo-vacuum treatment. Crystalline content of carbohydrates increased. The decrease in O/C ratio signified the increase of the relative content of lignin and extractives on the wood surfaces in the heating process.