文献类型：期刊文献

英文题名：Changes of Chemical Composition, Crystallinity, and Fourier Transform Infrared Spectra of Eucalypt pellita Wood under Different Vacuum Heat Treatment Temperatures

作者：Wang, Xuehua[1,2] Wu, Zhihui[1] Fang, Lu[1] Wei, Penglian[3] Fei, Benhua[3] Liu, Junliang[2]

第一作者：Wang, Xuehua

通信作者：Fei, BH[1]

机构：[1]Nanjing Forestry Univ, Coll Furniture & Ind Design, Nanjing, Jiangsu, Peoples R China;[2]Chinese Acad Forestry, Res Inst Wood Ind, Beijing, Peoples R China;[3]Int Ctr Bamboo & Rattan, Beijing, Peoples R China

年份：2015

卷号：65

期号：7-8

起止页码：346-351

外文期刊名：FOREST PRODUCTS JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000366950200007)】；

基金：The authors are grateful for the support of the "Study on the Thermal Effects and Influence of Wood under Vacuum Heat Treatment," Chinese National Natural Science Foundation, Grant. No. 31370558, the science and technology project "Design, Building and Evaluation of Bamboo/Wooden Demonstration Room," funded by China's "12th Five-Year Plan," Grant No. 2012BAD23B0105, the Priority Academic Program Development of Jiangsu Higher Education Institutions, Grant No. PAPD, Nanjing Forestry University high level talent research and Research Fund, Grant No. GXL1023, and Jiangsu Natural Science Foundation of China, Grant No. BK20150881.

语种：英文

外文关键词：Bending strength - Benzene - Crystallinity - Fourier transform infrared spectroscopy - Heat treatment - Hydrogen bonds

摘要：Heat treatment is one effective method of improving dimensional stability and durability of wood. However, it usually decreases the bending strength of wood. Vacuum heat treatment, which is one way that does not use a thermal medium, had little influence on wood elasticity or bending strength in our previous study. But until now, few studies have reported on the changing mechanism of vacuum heat treated wood. In this article, chemical composition and crystallinity of untreated and treated Eucalypt pellita wood were investigated under vacuum heat treatment temperatures from 80 degrees C to 280 degrees C for 4 hours. The results showed that lignin content increased and that holocellulose and alpha-cellulose decreased when the temperature was raised. Alcohol benzene extractive increased at the initial stage and then decreased when the temperature was above 240 degrees C. Crystallinity of wood increased with a temperature increase from 80 degrees C to 200 degrees C and reached a maximum value of 52.57 percent. Fourier transform infrared spectroscopy analysis indicated that absorption intensity of a benzene skeleton at 1,600 cm(-1) increased and that the hydrogen bond absorption band at 3,423 cm(-1) shifted to a lower wave number as temperature increased.