文献类型：期刊文献

英文题名：Modification mechanism of plantation wood via grafting epoxy monomers onto cell walls

作者：Guo, Dengkang[1] Yang, Sheng[1] Fu, Feng[1] Guo, Nai[1] Li, Gaiyun[1] Chu, Fuxiang[2]

第一作者：Guo, Dengkang

通信作者：Li, GY[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, 1 Dongxiaofu Xiangshan Rd, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210037, Peoples R China

年份：2022

卷号：56

期号：3

起止页码：813-831

外文期刊名：WOOD SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20221712008395);Scopus(收录号：2-s2.0-85128449792);WOS:【SCI-EXPANDED(收录号:WOS:000784823000001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (No. 31890772).

语种：英文

外文关键词：Biodegradation - Compressive strength - Curing - Decay (organic) - Grafting (chemical) - Monomers

摘要：The range of application for fast-growing plantation wood is limited by its dimensional instability, susceptibility to biodegradation and low mechanical strength. In this study, a novel method based on in situ reaction of a hydrophilic epoxy monomer (1,4-butanediol diglycidyl ether) in the wood cell walls was proposed to improve the performance of plantation wood. The effects of curing agent on the reaction mechanism and performance of treated wood were discussed in detail. The results demonstrated that after curing using methyl hexahydro phthalic anhydride (MHHPA), an epoxy oligomer with a higher molecular weight and superior water resistance was formed inside the wood cell wall compared to curing with the 2-methylimidazole (2-MI). Moreover, the epoxy group was able to react with alcohol and phenolic hydroxyl in wood through 2-MI catalysis resulting in a higher grafting ratio. After the modification reaction, notable improvements were observed in the dimensional stability (anti-swelling efficiency of more than 65%), fungal (Gloeophyllum trabeum) decay resistance (weight loss of < 6%) and compressive strength (increased by 17%) of the wood.