文献类型：期刊文献

英文题名：Water vapor sorption characteristics and hysteresis of earlywood and latewood within the same growth ring of Catalpabungei

作者：Yin, Fangyu[1] Du, Yamin[1] Li, Zhu[1] Jiang, Jiali[1]

第一作者：Yin, Fangyu

通信作者：Jiang, JL[1]

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

年份：0

外文期刊名：WOOD SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20230513462884);Scopus(收录号：2-s2.0-85146921681);WOS:【SCI-EXPANDED(收录号:WOS:000923341500005)】；

基金：This study was funded by the Fundamental Research Funds of the Chinese Academy of Forestry (CAFYBB2020MA001) and the National Natural Science Foundation of China (No. 32071689) sponsored this research.

语种：英文

摘要：Catalpabungei is an economically important native hardwood in China whose hygroscopic behavior is vital for industrial applications as it influences the final product's dimensional stability and mechanical properties. In this study, the adsorption and desorption behavior of earlywood and latewood in the same growth ring of C. bungei wood samples was documented using a dynamic vapor sorption resolution and analyzed using the Guggenheim-Andersen-de Boer (GAB) model. The earlywood and latewood exhibited varying sorption isotherms and hysteresis degrees, and the reasons were analyzed in terms of structure and chemical composition (mainly hemicellulose and lignin). The influence of benzene-alcohol extracts and vessels on sorption characteristics was also examined. The GAB model perfectly fits the experimental data (R-2 >= 99.7%) over the full relative humidity range. Specifically, parameters such as the internal specific surface area of wood can be obtained from the GAB model to help explain the differences in sorption properties between earlywood and latewood. The maximum water content bound to the primary sites for earlywood and latewood is 6.87% and 7.47%, respectively. Correspondingly, two internal specific surface areas are 261 m(2)/g and 284 m(2)/g, respectively. The adsorption isotherms of earlywood and latewood in C. bungei cannot be fully classified as type II.