文献类型：期刊文献

英文题名：Effects of action processes on wood modification: the in situ polymerization of epoxy monomers as an example

作者：Guo, Dengkang[1] Yang, Sheng[1] Fu, Feng[1] Li, Gaiyun[1] Chu, Fuxiang[1]

第一作者：Guo, Dengkang

机构：[1] Research Institute of Wood Industry, Chinese Academy of Forestry, No. 1 Dongxiaofu Xiangshan Road, Haidian District, Beijing, 100091, China

年份：2022

卷号：56

期号：6

起止页码：1705-1720

外文期刊名：Wood Science and Technology

收录：EI(收录号：20224413049714);Scopus(收录号：2-s2.0-85140972793)

语种：英文

外文关键词：Amines - Compressive strength - Monomers - Organic solvents - Shrinkage - Wood

摘要：A suitable polymer formation process is crucial for the design of new wood modification systems. An unsuitable polymer formation process may result in defects and a decrease in the performance of modified wood. This study elucidates that the shrinkage of the gel polymer formed in situ in wood during polymerization results in the shrinking and cracking of the modified wood and shows the importance of separating polymers and solvents during the first stage of wood cell wall polymerization modification to avoid the formation of a gel polymer. Based on this principle, a new epoxy modification system for this process is designed, which includes an epoxy monomer (1,4-butanediol diglycidyl ether), a curing agent (isophorone diamine), and a solvent (ethyl alcohol and water). The epoxy polymer is separated from water during the first-stage reaction, thereby avoiding the formation of a gel polymer. No shrinkage or cracking is observed in the modified wood. Furthermore, the performance of the treated wood is improved. The results show that the anti-swelling efficiency, modulus of rupture, modulus of elasticity, and compressive strength of the treated wood are enhanced by 49%, 20.4%, 24.1%, and 44.2%, respectively, compared with untreated wood. This study provides a reference for the design of new wood modification systems. ? 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.