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Journal of Wood Science

, Volume 64, Issue 3, pp 246–255 | Cite as

The effects of chemical components and particle size on the mechanical properties of binderless boards made from oak (Quercus spp.) logs degraded by shiitake fungi (Lentinula edodes)

  • Florence Hiu Yan Lui
  • Yoko Kurokochi
  • Hiroe Narita
  • Yukie Saito
  • Masatoshi Sato
Original Article
  • 276 Downloads

Abstract

Binderless boards are composite boards that rely on self-bonding mechanisms for inter-fibre bonding. Quercus acutissima and Quercus serrata logs degraded by Lentinula edodes (shiitake fungi) were used in this study to investigate whether physical and chemical changes induced by shiitake fungi can enhance board mechanical properties. Binderless boards were manufactured with 0.8 g/cm3 target density, 220 °C pressing temperature, 5 MPa pressure, and pressing duration of 10 min. Boards made from logs degraded for ≥ 26 months were stronger than control boards and met modulus of rupture (MOR) and internal bonding (IB) requirements for fibreboards. Chemical composition and particle size distribution of the wood powder used to make the boards were determined to elucidate the drivers of board mechanical properties. The proportion of small particles (< 150 µm) showed a strong positive correlation with MOR for both species and hot water extractives showed a strong positive correlation with IB for Q. acutissima boards. Introduction of shiitake fungi pre-treatment to the production process may enhance the mechanical strength of binderless boards.

Keywords

Binderless board Internal bonding Shiitake Degradation 

Notes

Acknowledgements

The authors express their deepest gratitude to Ms. Rie Yamashita (Industrial Research Institute of Shizuoka Prefecture) and Mr. Kiyoshi Shimura (MUSH-Shimura Farm) for their assistance in sourcing and collecting the raw materials. The authors also thank Dr. Kenji Aoki, Dr. Kei Maeda, and Mr. Akihiko Miyake for providing assistance with the mechanical tests.

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Copyright information

© The Japan Wood Research Society 2018

Authors and Affiliations

  • Florence Hiu Yan Lui
    • 1
  • Yoko Kurokochi
    • 1
  • Hiroe Narita
    • 1
  • Yukie Saito
    • 1
  • Masatoshi Sato
    • 1
  1. 1.Graduate School of Agricultural and Life SciencesThe University of TokyoTokyoJapan

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