文献类型：期刊文献

英文题名：Influence of resin molecular weight on bonding interface, water resistance, and mechanical properties of bamboo scrimber composite

作者：Rao, Fei[1] Ji, Yaohui[2] Huang, Yuxiang[2] Li, Neng[3] Zhang, Yahui[2] Chen, Yuhe[3] Yu, Wenji[2]

第一作者：Rao, Fei

通信作者：Rao, F[1];Zhang, YH[2]

机构：[1]Zhejiang Sci Tech Univ, Sch Art & Design, 2 St 928, Hangzhou 310018, Peoples R China;[2]Chinese Acad Forestry, Res Inst Wood Ind, Xiang Shan Rd, Beijing 100091, Peoples R China;[3]China Natl Bamboo Res Ctr, Dept Efficient Utilizat Bamboo & Wood, Wenyi Rd 310, Hangzhou 310012, Peoples R China

年份：2021

卷号：292

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：;EI(收录号：20211810306849);Scopus(收录号：2-s2.0-85105101004);WOS:【SCI-EXPANDED(收录号:WOS:000660565200004)】；

基金：This work is supported by National Natural and Science Foundation of China (31971738) , and the Science Foundation of Zhejiang Sci-Tech University (11340031282014 & 20082335-Y) .

语种：英文

外文关键词：Bamboo scrimber composite; Phenol-formaldehyde resin; Bonding interface; Water resistance; Mechanical properties

摘要：The bamboo/resin bonding interface significantly influences the preparation and final properties of bamboo scrimber composites (BSCs). Here, BSCs were prepared with different molecular weights of brominated phenol-formaldehyde resin (BrPF, M-w = 542-2001) and Moso bamboo as raw materials and their physicomechanical properties were evaluated. The macroscopic distribution and microscopic penetration of the resin at the bonding interface depended on the resin's molecular weight distribution. High-molecular-weight resin was distributed in the damaged bamboo cell cavity near the bondline, while low-molecular-weight resin penetrated the cell wall. Excessive penetration by low-molecular-weight resin induced a severe lack of resin at the bondline. The resin and the bamboo cellulose experienced a cross-linking reaction at the molecular level, generating secondary forces such as polar forces and hydrogen bonds. The molecular weight distribution of the resin had a significant effect on the physical and mechanical properties of BSC. With increasing resin molecular weight, the water resistance of the BSC gradually increased, the bending performance and compressive strength gradually decreased, and the shear strength initially increased and then decreased. The bonding mechanism of BSC was studied at multiple scales, and the influence of resin molecular weight on its physicomechanical properties was investigated. (C) 2021 Elsevier Ltd. All rights reserved.