文献类型：期刊文献

英文题名：Wood composites modified with waterborne hyperbranched polyacrylate dispersed organo-montmorillonite emulsion and the permeability investigations by surface characterizations

作者：Li, Xiaoyan[1] Xu, Jianfeng[1] Long, Ling[1] Liu, Ru[1]

通信作者：Liu, R[1]|[a0005be6e90476f57c0e3]刘如;

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

年份：2020

卷号：41

期号：9

起止页码：3798-3806

外文期刊名：POLYMER COMPOSITES

收录：;EI(收录号：20202408829118);Scopus(收录号：2-s2.0-85086331669);WOS:【SCI-EXPANDED(收录号:WOS:000539832900001)】；

基金：National Natural Science Foundation of China, Grant/Award Number: 31800470

语种：英文

外文关键词：hyperbranched polyacrylate; impregnation depth; organo-montmorillonite; surface property; wood

摘要：A novel waterborne hyperbranched polyacrylate (HBPA) dispersed organo-montmorillonite (OMMT) emulsion was synthesized in laboratory. The sapwood of Cathay poplar (Populus cathayanaRehd.) was modified with the emulsion via vacuum treatment for polymer impregnated wood composite with cross section sealing off. Some surface characterization was carried out to analyze the impregnation depth. The results showed that OMMT and HBPA successfully penetrated into the wood cell wall with completely exfoliated OMMT and formed a hydrophobic film covering on the inner surface of cell wall lumen, which improved the surface hydrophobicity and mechanical properties of wood cell wall. With increasing impregnation depth, the improvements decreased, which was associated with the limited impregnation ability of the modifiers only with the pathway of radial and tangential sections. Thus, for better modification, the cross section of the wood must be unobstructed.