文献类型：期刊文献

英文题名：The Viscoelastic Properties of Chinese Fir During Water-Loss Process Under Hydrothermal Conditions

作者：Zhan, Tianyi[1] Jiang, Jiali[1,2] Lu, Jianxiong[1]

第一作者：Zhan, Tianyi

通信作者：Lu, JX[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry New Technol, Beijing 100091, Peoples R China

年份：2015

卷号：33

期号：14

起止页码：1739-1745

外文期刊名：DRYING TECHNOLOGY

收录：;EI(收录号：20153001049757);Scopus(收录号：2-s2.0-84940722611);WOS:【SCI-EXPANDED(收录号:WOS:000360664900007)】；

基金：This work was financially supported by the Fundamental Research Funds of the Institute of Forestry New Technology, Chinese Academy of Forestry (CAFINT2014C03), and the National Natural Science Foundation of China (No. 30825034).

语种：英文

外文关键词：Chinese fir; Cole-Cole diagrams; Hydrothermal; Viscoelastic properties; Water-loss process

摘要：In this article, the viscoelastic properties of water-swollen Chinese fir during a water-loss process under different hydrothermal conditions (30-90 degrees C, 40-80% RH) were investigated. After the 300min hydrothermal process at 70 or 90 degrees C, the moisture contents (MCs) of the specimens were well below the MC value at the fiber saturation point. During the hydrothermal process, normalized E increased at first, and then leveled off at temperatures above 50 degrees C. The wood specimens were softened due to the hydrothermal effect. The glass transition of hemicellulose appeared at 50 degrees C. Lignin transition was observed at 70 and 90 degrees C. Superposition of transitions of lignin and hemicellulose moved to low storage modulus E with increasing temperature and RH level.