文献类型：期刊文献

英文题名：Cell Wall Property Changes of White Rot Larch during Decay Process

作者：Shangguan, Weiwei[1] Ren, Haiqing[1] Lv, Jianxiong[1] Fei, Benhua[2] Chen, Zhangjing[3] Zhao, Rongjun[1] Zhao, Youke[1]

第一作者：Shangguan, Weiwei

通信作者：Zhao, RJ[1]|[a000555af1057d20aad88]赵荣军;

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China;[2]Int Ctr Bamboo & Rattan, Beijing 100102, Peoples R China;[3]Virginia Polytech Inst & State Univ, Dept Wood Sci & Forest Prod, Blacksburg, VA 24060 USA

年份：2014

卷号：9

期号：3

起止页码：4297-4310

外文期刊名：BIORESOURCES

收录：;EI(收录号：20212410502340);Scopus(收录号：2-s2.0-84911373282);WOS:【SCI-EXPANDED(收录号:WOS:000344184300046)】；

基金：The authors wish to thank the State Key Laboratory of the Chinese Academy of Forestry Foundation (CAFYBB2012044) and the National "973" Project Foundation of China (2012CB114506) for their financial support.

语种：英文

外文关键词：White rot; Longitudinal tensile strength; Nano-indentation hardness; XRD; FTIR

摘要：Larch flakes infested with white rot fungus were examined following several infestation durations with respect to the mass loss, tensile strength, hardness, porosity, and change in cell wall components. Nano-indentation, X-ray diffraction (XRD), nitrogen adsorption, and Fourier transform infrared (FTIR) spectroscopy testing methods were employed to investigate the property changes during the decay process. The testing results showed that the mass loss was greater and the longitudinal tensile strength decreased following the first three-week infestation. Nano-indentation measurements revealed that the average MOE of infested larch flakes decreased from 24.0 to 17.1 GPa and the average hardness declined from 528.47 to 427.87 MPa following 12 weeks of infestation. After the first three weeks, the relative crystallinity, surface area, and micropore area of the infested samples increased. These parameters decreased after three weeks had elapsed. Changes in the absorption peaks observed in FTIR explained that the first three-week infestation had a strong effect on the mass loss and strength changes. This suggests that white rot fungus intensely attacked the lignin component of the biomass during the first three weeks of infestation.