文献类型：期刊文献

英文题名：Influence of hygrothermal condition on dynamic viscoelasticity of Chinese fir (Cunninghamia lanceolata). Part 2: moisture desorption

作者：Zhan, Tianyi[1,2] Jiang, Jiali[1] Lu, Jianxiong[1] Zhang, Yaoli[2] Chang, Jianmin[3]

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]Nanjing Forestry Univ, Coll Mat Sci & Engn, Nanjing 210037, Jiangsu, Peoples R China;[3]Beijing Forestry Univ, Coll Mat Sci & Technol, Beijing 100083, Peoples R China

年份：2018

卷号：72

期号：7

起止页码：579-588

外文期刊名：HOLZFORSCHUNG

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000437362700007)】；

基金：This work was financially supported by the National Natural Science Foundation of China, Funder Id: 10.13039/501100001809, (No. 31700487), the Natural Science Foundation of Jiangsu Province (CN) (No. BK20170926), the Innovation Fund for Young Scholars of Nanjing Forestry University (CX2017002), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

语种：英文

外文关键词：hygrothermal conditions; mechano-sorptive effect; moisture desorption; residual instability; viscoelasticity

摘要：The influence of hygrothermal condition on dynamic viscoelasticity of Chinese fir (Cunninghamia Ianceolata) during the moisture desorption (M-Des) process was investigated. The ambient hygrothermal environments were set up as a series of constant temperatures and two relative humidity (RH) modes (RHramp-down and RHisohume). The M-Des, provided space for the rearrangement of the hydrogen bonds (Re-HB) and caused a mechano-sorptive (M-Des) effect. The enhancement of the Re-HB effect negatively correlated with the increment of loss modulus, while the elevation of the MS and the heating effects intensified the loss modulus. Lower values of RHc, determining the plateau area of loss modulus, were obtained at higher temperatures or greater RH ramping rates. The residual instability in the wood cell wall was quantitatively characterized by the extent of the MS effect. Residual instability was inversely proportional to the RHisohume level during the M-Des process. The study of time dependent viscoelastic properties under moisture changing process provided insight into the condition of adsorbed water in the cell wall and optimized the manufacturing technique involved in the thermo-hygro-mechanical treatment of wood.