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Holzforschung

International Journal of the Biology, Chemistry, Physics, and Technology of Wood

Editor-in-Chief: Faix, Oskar

Editorial Board Member: Daniel, Geoffrey / Militz, Holger / Rosenau, Thomas / Salmen, Lennart / Sixta, Herbert / Vuorinen, Tapani / Argyropoulos, Dimitris S. / Balakshin, Yu / Barnett, J. R. / Burgert, Ingo / Rio, Jose C. / Evans, Robert / Evtuguin, Dmitry V. / Frazier, Charles E. / Fukushima, Kazuhiko / Gindl-Altmutter, Wolfgang / Glasser, W. G. / Holmbom, Bjarne / Isogai, Akira / Kadla, John F. / Koch, Gerald / Lachenal, Dominique / Laine, Christiane / Mansfield, Shawn D. / Morrell, J.J. / Niemz, Peter / Potthast, Antje / Ragauskas, Arthur J. / Ralph, John / Rice, Robert W. / Salin, Jarl-Gunnar / Schmitt, Uwe / Schultz, Tor P. / Sipilä, Jussi / Takano, Toshiyuki / Tamminen, Tarja / Theliander, Hans / Welling, Johannes / Willför, Stefan / Yoshihara, Hiroshi

12 Issues per year


IMPACT FACTOR 2016: 1.868
5-year IMPACT FACTOR: 1.875

CiteScore 2016: 1.83

SCImago Journal Rank (SJR) 2015: 0.817
Source Normalized Impact per Paper (SNIP) 2015: 0.954

Online
ISSN
1437-434X
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Volume 64, Issue 5 (Aug 2010)

Issues

A single cell model for pretreatment of wood by microwave explosion

Xianjun Li
  • Material Science and Engineering School of Central South University of Forestry and Technology, Changsha, Hunan, PR China
/ Yongdong Zhou
  • Research Institute of Wood Industry, Chinese Academy of Forestry, Haidian District, Beijing, PR China
/ Yonglin Yan
  • Material Science and Engineering School of Central South University of Forestry and Technology, Changsha, Hunan, PR China
/ Zhiyong Cai
  • USDA Forest Products Laboratory, Madison, WI, USA
/ Fu Feng
  • Research Institute of Wood Industry, Chinese Academy of Forestry, Haidian District, Beijing, PR China
Published Online: 2010-07-29 | DOI: https://doi.org/10.1515/hf.2010.095

Abstract

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.

Keywords: microwave explosion; pretreatment; single cell model; wood

About the article

Corresponding author. USDA Forest Service, Forest Products Laboratory, One Gifford Pinchot Drive, Madison, WI 53726-2398, USA


Received: 2009-11-18

Accepted: 2010-05-03

Published Online: 2010-07-29

Published Online: 2010-07-29

Published in Print: 2010-08-01


Citation Information: Holzforschung, ISSN (Online) 1437-434X, ISSN (Print) 0018-3830, DOI: https://doi.org/10.1515/hf.2010.095.

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