文献类型：期刊文献

英文题名：An in-depth study of the strengthening mechanism in wood scrimber prepared via roller-pressing impregnation technology

作者：Wu, Jieyu[1] Zhang, Yamei[1] Yu, Wenji[1]

第一作者：Wu, Jieyu

通信作者：Zhang, YM[1]

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

年份：2024

卷号：457

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：;EI(收录号：20244917475665);Scopus(收录号：2-s2.0-85210715761);WOS:【SCI-EXPANDED(收录号:WOS:001414803800001)】；

基金：This work was supported by the Key Technology and Equipment for Continuous Manufacturing of High Performance Wood Scrimber (2021YFD2200601) .

语种：英文

外文关键词：Cage impregnation; Roller-pressing impregnation; Wood scrimber; Dimensional stability; Mechanical properties

摘要：Wood scrimber, a new type of wood composite material, can replace nature high-quality wood. To improve the mechanical properties and dimensional stability of scrimber for wider applications, a negative pressure resinabsorption method called "roller-pressing impregnation" was developed to produce wood scrimber in this study. Compared to the properties of wood scrimber prepared using the cage impregnation method (CWS), rollerpressing impregnated wood scrimber (RWS) exhibited significantly reduced surface roughness and wettability. Moreover, the thickness and width swelling rate of RWS decreased by 26.15 % and 18.77 % respectively, while the modulus of rupture increased by 12.45 %. Microscopic observation demonstrated that the weak tissue (middle lamella and vessels) in the oriented wood fiber mats (OWFMs) were damaged during the roller-pressing process. Meanwhile, these cleaved cellular helped the resin be absorbed more uniformly into the vessel cavities by the negative pressure, which enhanced the strength of the resin bonding between cells and also strengthened the hardness and elastic modulus of the cell wall. Therefore, the dimensional stability and mechanical properties of the scrimber were successfully enhanced. The in-depth exploration of the mechanism behind the roller impregnation technology was expected to accelerate the accurate controlling of the wood scrimber properties for continuous production.