文献类型：期刊文献

英文题名：Surface physicochemical properties of surface-compressed wood subjected to superheated steam treatment under varying pressures

作者：Xiang, Elin[1] Jin, Xiaobei[2] Li, Jing[1] Huang, Rongfeng[1]

第一作者：Xiang, Elin

通信作者：Huang, RF[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Int Ctr Bamboo & Rattan, Beijing 100102, Peoples R China

年份：2024

卷号：418

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：;EI(收录号：20240815598853);Scopus(收录号：2-s2.0-85185334608);WOS:【SCI-EXPANDED(收录号:WOS:001199444100001)】；

基金：This work was supported by the National Nature Science Foundation of China (Grant No. 32071690) .

语种：英文

外文关键词：Poplar wood; Surface compression; Superheated steam pressure; Surface physicochemical properties; Dimensional stability; Mechanism

摘要：This study aimed to evaluate the effects of superheated steam treatment at different pressures (0.1 MPa, 0.3 MPa, 0.5 MPa, and 0.7 MPa) on the physicochemical properties of surface-compressed (SC) poplar wood. Applying a 20% compression ratio significantly increased the average density of the SC wood, while reducing its surface wettability and roughness. The compressive deformation of SC wood with superheated steam treatment (SHTSC wood) could be permanently fixed under a steam pressure of 0.7 MPa, yielding higher hydrophobic surface properties. Furthermore, the surface color of SHTSC wood resembled that of hardwood commonly used in furniture. The structural changes, such as increased surface density and decreased roughness, had a greater impact on reducing the surface wettability of SC wood than chemical changes. Additionally, superheated steam treatment led to deacetylation of hemicellulose, demethoxylation of lignin, and an increase in the relative crystallinity and crystal width of cellulose, thereby improving the surface properties and dimension stability of SHTSC wood. Overall, this study demonstrated that the combined modification treatment provides a new perspective for enhancing the utilization of fast-growing wood.