文献类型：期刊文献

英文题名：Effect of Grafting Conditions on the Interfacial Properties of Silane Modified Wood Veneer/PE Film Plywood

作者：Chang, Liang[1] Wang, Yuanwu[1] Chen, Xueqi[1] Ren, Yiping[1] Luo, Xiaoxi[1]

第一作者：常亮

通信作者：Chang, L[1]

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

年份：2023

卷号：15

期号：13

外文期刊名：POLYMERS

收录：;EI(收录号：20232914404568);Scopus(收录号：2-s2.0-85164680275);WOS:【SCI-EXPANDED(收录号:WOS:001028396800001)】；

基金：This research was funded by the Fundamental Research Funds of CAF, Grant/Award Number: CAFYBB2021ZB004; Scientific and Technological Achievements Promotion Project of Forestry and Grassland, Grant/Award Number: 2020133147.

语种：英文

外文关键词：compatibilization; wood veneer; PE film; grafting conditions

摘要：In order to elucidate the importance of grafting in the compatibilization process of silane coupling agents, poplar veneer was treated with silane coupling agents and grafted under different heating conditions. The treated veneers were used composited with PE film to prepare different plywood samples. XPS and WCA were used to analyze the effect of grafting conditions on the surface properties of the silane-treated veneer. The results showed that free silanols can physically be adsorbed onto all silane-treated veneer surfaces, forming hydrogen-Si-O-Si- bonds and therefore increasing the water contact angle. Only under heating conditions could the -Si-O-Si- be converted into covalent -Si-O-C- bonds, which helped to improve the bonding strength. When silane-treated veneer was grafted at 120 & DEG;C for 90 min, the tensile shear strength of plywood reached 1.03 MPa, meeting the requirements of GB/T 9846.3-2004 for outdoor materials. Enhanced interlock between silane-modified veneer and PE film was observed under the optimal grafting condition by SEM. The better interface structure allowed improvement of thermal stability. DMA results showed that the retention rate in storage modulus at 130 & DEG;C was 60% for the grafted sample, while the retention rate for the ungrafted sample was only 31%.