文献类型：期刊文献

英文题名：A single cell model for pretreatment of wood by microwave explosion

作者：Li, Xianjun[1,2] Zhou, Yongdong[3] Yan, Yonglin[2] Cai, Zhiyong[] Feng, Fu[3]

第一作者：Li, Xianjun

通信作者：Li, XJ[1]|[a0005806eecaba6e8baa3]李贤军;

机构：[1]US Forest Serv, Forest Prod Lab, USDA, Madison, WI 53726 USA;[2]Cent S Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha, Hunan, Peoples R China;[3]Chinese Acad Forestry, Res Inst Wood Ind, Beijing, Peoples R China

年份：2010

卷号：64

期号：5

起止页码：633-637

外文期刊名：HOLZFORSCHUNG

收录：;EI(收录号：20103613212043);Scopus(收录号：2-s2.0-77956192825);WOS:【SCI-EXPANDED(收录号:WOS:000280627400013)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 30871983), and the State Forestry Administration of China (2006-4-99).

语种：英文

外文关键词：microwave explosion; pretreatment; single cell model; wood

摘要：A theoretical model was developed to better understand the process of microwave explosion treatment of wood cells. The cell expansion and critical conditions concerning pressure and temperature of ray parenchyma cells in Eucalyptus urophylla were simulated during microwave pretreatment. The results indicate that longitudinal and circumferential stresses were generated in the cell walls owing to the internal steam pressure during extensive microwave treatment. The circumferential stress is twice as high as the longitudinal stress. The pressure difference reaches its maximum value of 0.84 MPa when the extension ratio is 1.20 for the longitudinal direction and 1.62 for the circumferential direction. The maximum pressure difference at the theoretical yielding point is the critical pressure difference that can eventually rupture the ray cell. The critical pressure difference decreases with increasing cell radius and decreasing shear modulus in the cell wall. This simulated result provides useful information to modify wood at the level of ray parenchyma cells.