文献类型：期刊文献

英文题名：Changes of wood cell walls in response to hygro-mechanical steam treatment

作者：Guo, Juan[1] Song, Kunlin[1] Salmen, Lennart[2,3] Yin, Yafang[1,2]

第一作者：郭娟

通信作者：Salmen, L[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Dept Wood Anat & Utilizat, Beijing 100091, Peoples R China;[2]Royal Inst Technol KTH, Wallenberg Wood Sci Ctr, SE-10044 Stockholm, Sweden;[3]Innventia AB, SE-11486 Stockholm, Sweden

年份：2015

卷号：115

起止页码：207-214

外文期刊名：CARBOHYDRATE POLYMERS

收录：;EI(收录号：20143900068705);Scopus(收录号：2-s2.0-84907101350);WOS:【SCI-EXPANDED(收录号:WOS:000344869800028)】；

基金：This study was sponsored by the Wallenberg Wood Science Center (WWSC) of the Royal Institute of Technology (KTH) of Sweden. Yafang Yin gratefully acknowledges financial support by the Chinese National Natural Science Foundation (no. 31370559) and the China Scholarship Council (CSC), and the approval of a short term scientific mission (STSM) by the COST (European Cooperation in the field of Scientific and Technical Research) Action FP0802 for financial support of a visit to Max-Planck Institute of Colloids and Interfaces for nanoindentation testing. The technical help from Professor Lars Berglund of KTH for the discussion of experimental design, Dr. Toshiro Morooka of Research Institute for Sustainable Humanosphere, Kyoto University, Japan for the compression combined with steam treatment, Anna Jensen of Innventia AB for the steam treatment, Ingela Bjurhager of KTH for micro-sample cutting, Anni Hagberg of Innventia AB for sample embedding, and Dr. Ingo Burgert and Mr. Bo Zhang of the Department of Biomaterials of Max-Planck Institute of Colloids and Interfaces at Potsdam, Germany for instructions of nanoindentation measurement is gratefully acknowledged.

语种：英文

外文关键词：Cell wall; Hygro-mechanical steam treatment; Earlywood; Latewood; Biopolymer components

摘要：The effects of compression combined with steam treatment (CS-treatment), i.e. a hygro-mechanical steam treatment on Spruce wood were studied on a cell-structure level to understand the chemical and physical changes of the secondary cell wall occurring under such conditions. Specially, imaging FT-IR microscopy, nanoindentation and dynamic vapour absorption were used to track changes in the chemical structure, in micromechanical and hygroscopic properties. It was shown that CS-treatment resulted in different changes in morphological, chemical and physical properties of the cell wall, in comparison with those under pure steam treatment. After CS-treatment, the cellular structure displayed significant deformations, and the biopolymer components, e.g. hemicellulo se and lignin, were degraded, resulting in decreased hygroscopicity and increased mechanical properties of the wood compared to both untreated and steam treated wood. Moreover, CS-treatment resulted in a higher degree of degradation especially in earlywood compared to a more uniform behaviour of wood treated only by steam. (C) 2014 Elsevier Ltd. All rights reserved.