文献类型：期刊文献

英文题名：Effect of Steam Treatment on the Properties of Wood Cell Walls

作者：Yin, Yafang[1,3] Berglund, Lars[3] Salmen, Lennart[2,3]

第一作者：殷亚方;Yin, Yafang

通信作者：Salmen, L[1]

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

年份：2011

卷号：12

期号：1

起止页码：194-202

外文期刊名：BIOMACROMOLECULES

收录：;EI(收录号：20110313588568);Scopus(收录号：2-s2.0-78651278962);WOS:【SCI-EXPANDED(收录号:WOS:000285956700026)】；

基金：This study was sponsored by the Wallenberg Wood Science Center (WWSC) of the KTH Royal Institute of Technology, Sweden. Y.Y. would like to gratefully acknowledge the financial support from the China Scholarship Council (CSC) and the Chinese National Natural Science Foundation (No. 30972303 and 30825034), the approval for a short-term scientific mission (STSM) by the COST (European Cooperation in the field of Scientific and Technical Research) Action FP0802, and for financial support for a visit to the Max-Planck Institute of Colloids and Interfaces for nanoindentation testing. Gratitude goes to the following: Anna Jensen of Innventia AB for the technical help given by her with the steam treatment, Ingela Bjurhager of KTH for microsample cutting, Anni Hagberg of Innventia AB for sample embedding, And Dr. Ingo Burgert and Mr. Bo Zhang of the Department of Biomaterials at the Max-Planck Institute of Colloids and Interfaces, Potsdam, Germany, for instructions concerning nanoindentation measurement.

语种：英文

外文关键词：Cells - Composite materials - Cytology - Glucose - Lignin - Steam - Wood

摘要：Steam treatment is a hygrothermal method of potential industrial significance for improving the dimensional stability and durability of wood materials. The steaming results in different chemical and micromechanical changes in the nanostructured biocomposite that comprise a wood cell wall. In this study, spruce wood (Picea abies Karst.) that had been subjected to high-temperature steaming up to 180 degrees C was examined, using imaging Fourier Transform Infrared (FT-IR) microscopy and nanoindentation to track changes in the chemical structure and the micromechanical properties of the secondary cell wall. Similar changes in the chemical components, due to the steam treatment, were found in earlywood and latewood. A progressive degradation of the carbonyl groups in the glucuronic acid unit of xylan and a loss of mannose units in the glucomannan backbone, that is, a degradation of glucomannan, together with a loss of the C=O group linked to the aromatic skeleton in lignin, was found. The development of the hygroscopic and micromechanical properties that occurred with an elevation in the steam temperature correlated well with this pattern of degradation in the constituents in the biocomposite matrix in the cell wall (hemicellulose and lignin).