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：Sun, Bailing|[a0005d7a4bc85fa34a660]孙柏玲;

机构：[1] Chinese Academy of Forestry, Research Institute of Wood Industry, Beijing, 100091, China

年份：2019

卷号：64

期号：1

起止页码：1-11

外文期刊名：Wood Research

收录：EI(收录号：20192307001947);Scopus(收录号：2-s2.0-85066412719)

语种：英文

外文关键词：Chemical properties - Color - Degradation - Lignin - Nuclear magnetic resonance spectroscopy - Ultraviolet visible spectroscopy - X ray photoelectron spectroscopy

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, 13C 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 ΔE* 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. ? 2019 Statny Drevarsky Vyskumny Ustav. All rights reserved.