文献类型：期刊文献

英文题名：Micromechanical properties of wood cell wall and interface compound middle lamella using quasi-static nanoindentation and dynamic modulus mapping

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]

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：2018

卷号：53

期号：1

起止页码：549-558

外文期刊名：JOURNAL OF MATERIALS SCIENCE

收录：;EI(收录号：20173904209843);Scopus(收录号：2-s2.0-85029738463);WOS:【SCI-EXPANDED(收录号:WOS:000412900500036)】；

基金：The authors gratefully acknowledge financial supports from the Nature Science Foundation of China (Grant Number 31370012). The authors would also like to thank Fengqin Dong from the Institute Botany, the Chinese Academy of Sciences for her assistance in sample preparation.

语种：英文

外文关键词：Cells - Cytology - Histology - Mapping - Tissue - Tissue engineering - Wood

摘要：Micromechanical properties of individual phases within wood tissues are crucially important for the processing and utilization of this biomass material. The quasi-static nanoindentation and dynamic modulus mapping techniques were employed to study the micromechanical properties of wood cell walls and their interface regions. Nanoindentation results showed that the reduced modulus of secondary cell walls (18 GPa) was twice that of interface compound middle lamella (CML) (7 GPa). Modulus mapping, with advantages of high resolution and undamaged test over conventional nanoindentation, was able to analyse the subtle variations in micromechanical properties of individual phases within the whole wood tissues, especially interface layers. The variation tendency across adjacent cell walls was similar to that tested by nanoindentation, and the secondary cell walls exhibited maxima in the middle of the secondary wall and slightly reduction approaching to the S-1 and S-3 layers. Moreover, the storage modulus of interface region CML showed "W" distribution, which meant that the modulus first fell and then rose from the central area to edge regions.