文献类型：期刊文献

英文题名：High-strength wood-based composites via laminated delignified wood veneers with different adhesive contents for structural applications

作者：Zou, Miao[1] Tang, Qiheng[1] Guo, Wenjing[1]

第一作者：Zou, Miao

通信作者：Tang, QH[1]

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

年份：2022

卷号：43

期号：5

起止页码：2746-2758

外文期刊名：POLYMER COMPOSITES

收录：;EI(收录号：20220911721289);Scopus(收录号：2-s2.0-85125246718);WOS:【SCI-EXPANDED(收录号:WOS:000761229600001)】；

基金：National Natural Science Foundation of China, Grant/Award Number: 31800484

语种：英文

外文关键词：delignified wood veneer; high-strength; microstructure; phenol-formaldehyde resin; resin contents

摘要：The processing of natural wood into a high-performance wood-based composite to broaden the potential applications of wood can be achieved by various techniques using bulk wood as a raw material. However, attention has seldom been paid to the use of wood veneers for preparing high-performance structural materials. In this study, delignified birch veneers are used as raw materials to fabricate high-strength delignified wood-based laminated composites (DWLCs) with phenol-formaldehyde (PF) resin as adhesive. The DWLCs with a PF resin content of 40% had high mechanical properties and displayed flexural and tensile stress of 405.8 and 324.4 MPa, respectively. The flexural and tensile stress are 1.24 and 1.21 times higher than those of natural wood-based laminated composites (WLCs). And we confirmed that partial delignification could contribute to enhancing the mechanical properties of high-strength wood-based composites. By using scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS), the strengthening mechanisms of the high-performance DWLCs were investigated. Due to both the surface of the cell lumen and cell walls being filled with PF resin, the wood microstructure was cured under high pressure so that the DWLCs were enhanced.