文献类型：期刊文献

英文题名：Transforming interface properties of wood laminate composites functionalized by adhesive penetration

作者：Li, Zhenrui[1,2] Chu, Shimin[1] Zhang, Yu[1] Lin, Lanying[1,3] Liu, Xing'e[2]

第一作者：Li, Zhenrui

通信作者：Lin, LY[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Beijing Bamboo & Rattan Sci & Technol, Int Ctr Bamboo & Rattan, Key Lab Natl Forestry & Grassland Adm, Beijing 100102, Peoples R China;[3]1 Dongxiaofu Xiangshan Rd, Beijing 100091, Peoples R China

年份：2023

卷号：263

外文期刊名：COMPOSITES PART B-ENGINEERING

收录：;EI(收录号：20232614324465);Scopus(收录号：2-s2.0-85163215204);WOS:【SCI-EXPANDED(收录号:WOS:001055318400001)】；

基金：This study was supported by the National Natural Science Foundation of China (Grant no. 31890772) . The authors wish to acknowledge Dr. Dengkang Guo and Dr. Keying Long for guidance and advice on the experiment. Thanks also go to the Institute of Botany, the Chinese Academy of Sciences for using the LSM 980 confocal laser scanning microscope (Carl Zeiss, Oberkochen, Germany) , and to Dr. JingQuan Li for the experimental operation.

语种：英文

外文关键词：Wood laminate composites; Resin distribution; Interphase properties; Enhancement mechanism; Initial crack

摘要：Quantitative analysis of interface mechanical properties of wood laminate composites has been an urgent task of the interface mechanics, however, which is hindered by the lack of knowledge of the correlation between physiochemical structure and micromechanics of the whole wood bonding interphase. This work aimed to evaluate the influence of adhesive distribution with different variables (i.e., adhesive types, grain directions, and cells from the glue line) on the transforming interface properties. The results showed that the physiochemical structure and micromechanics performance were significantly affected by adhesive types, grain directions, or wood cells with the interphase microstructure of earlywood laminates being more sensitive to adhesive pene-tration than that of latewood laminates. The Phenol-formaldehyde (PF)-laminated interphase possessed a more complicated resin behavior and distribution, and microstructure compared to the one component polyurethane (1C-PUR)-laminated interphase. The distribution of resins near the glue line could recover and enhance the loss of the Er caused by the pressing and machining process. Compared with the control cells (C1, C2), the improved range of Er and H are 9.2%-41.2% and 6.7%-22.2% for the PF-laminated interphase, respectively, and 1.7%- 27.6% and 2.1%-8.5% for the 1C-PUR-laminated interphase, respectively. This improvement was mainly attributed to chemical fixing and physical filling into nanopores and physical supporting within cell walls, which could avoid the stress concentration to a different extent and protect the cell walls from the compressive deformation. The initial cracks probably resulting from the machining and/or shear slipping during the pressing process, could incur the global failure of wood laminates interphase.