文献类型：期刊文献

英文题名：Microstructure and Quantitative Micromechanical Analysis of Wood Cell-Emulsion Polymer Isocyanate and Urea-Formaldehyde Interphases

作者：Qin, Lizhe[1] Lin, Lanying[1,2] Fu, Feng[1] Fan, Mizi[2]

第一作者：Qin, Lizhe

通信作者：Lin, LY[1];Lin, LY[2];Fan, MZ[2]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Brunel Univ, Coll Engn Design & Phys Sci, Uxbridge UB8 3PH, Middx, England

年份：2017

卷号：23

期号：3

起止页码：687-695

外文期刊名：MICROSCOPY AND MICROANALYSIS

收录：;Scopus(收录号：2-s2.0-85015252940);WOS:【SCI-EXPANDED(收录号:WOS:000407562200022)】；

基金：The authors gratefully acknowledge the financial support by the Nature Science Foundation of China (No. 31370012).

语种：英文

外文关键词：interphase microstructure; micromechanical properties; fluorescence microscope; confocal laser scanning microscope; nanoindentation

摘要：Emulsion polymer isocyanate (EPI) and urea-formaldehyde (UF) were selected as typical resin systems to investigate the microstructure of wood-adhesive interphases by fluorescence microscopy (FM) and confocal laser scanning microscopy (CLSM). Further, a quantitative micromechanical analysis of the interphases was conducted using nanoindentation. The FM results showed that the UF resin could penetrate the wood to a greater extent than the EPI resin, and that the average penetration depth for these two resin systems was higher in the case of latewood. CLSM allowed visualization of the resin distribution with contrasting colors, showing that the EPI resin could not penetrate the cell wall, whereas UF resin could enter the cell walls. The micromechanical properties of the cell walls were almost unaffected by EPI penetration but were significantly affected by UF penetration, especially in the first cell wall from the glueline. This further confirmed that only cell walls with resin penetration can improve the mechanical properties of the interphase regions.