文献类型：期刊文献

英文题名：Gluing parameters optimization and failure mechanism of cross-laminated timber prepared with Chinese fir

作者：Shi, Lanlan[1] Gong, Yingchun[1,2] Li, Mingyue[1,2] Ren, Haiqing[1,2] Zhong, Yong[1,2] Wang, Yurong[1,2]

第一作者：Shi, Lanlan

机构：[1] Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100091, China; [2] Collaborative Innovation Center for Efficient Processing and Utilization of Forestry Resources, Nanjing Forestry University, Nanjing, 210037, China

年份：2024

卷号：215

外文期刊名：Industrial Crops and Products

收录：EI(收录号：20241916041737);Scopus(收录号：2-s2.0-85192213256)

语种：英文

外文关键词：Biomechanics - Building materials - Cytology - Ductile fracture - Glues - Gluing - Laminating - Scanning electron microscopy - Timber - Wood products

摘要：Cross-laminated timber (CLT) has become a popular engineered wood product, mainly prepared from imported wood in China. More extensive research is needed to improve the local production of cross-laminated timber with fast-growing coniferous wood species. Chinese fir (Cunninghamia lanceolata) and one component polyurethane (1C-PUR) adhesive were selected to prepare CLT under different process parameters. International standard methods, scanning electron microscopy (SEM), optical microscopy (LM), confocal laser scanning microscopy (CLSM), and nanoindentation (NI) were applied. The bonding performance and failure mechanism of Chinese fir CLT were investigated and clarified. The results showed that the optimal gluing parameters for preparing CLT from Chinese fir wood were 160 g/m2 of glue, 0.9 MPa of pressure, and 180 minutes of pressing time. Failure of CLT made from Chinese fir lumber was mainly due to the shear failure of the vertical layer board. Cracks often appeared in the earlywood cells near the boundary between earlywood and latewood. The impact of adhesive penetration on the mechanical properties of the wood cell wall showed that adhesive penetration increased the elastic modulus of the cell wall at earlywood and latewood cells. ? 2024 Elsevier B.V.