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Journal of Wood Science

Official Journal of the Japan Wood Research Society

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The effect of lignin on the bending properties and fixation by cooling of wood

Journal of Wood Science volume 55, pages 258–263 (2009)Cite this article

Abstract

To clarify the effects of lignin on the fixation of bending deformation by cooling, cooling set for delignified woods with various lignin residues were investigated to compare with mechanical and dynamic viscoelastic properties. Bending tests showed that steep reductions occurred in the modulus of elasticity and modulus of rupture with delignification during the initial stage of delignification. The dynamic viscoelastic measurements revealed that the peak temperature of tan δ due to micro-Brownian motion of lignin was reduced with delignification, and the peak disappeared in the temperature range of 5°–100°C for the specimens that had lost more than 21% of their weight. On the other hand, no clear change in residual set was found in the range of 0%–15% of weight loss in spite of a marked reduction in lignin content. Subsequently, set decreased steeply for the specimens delignified beyond 15% of weight loss. It was suggested that cooling set is not determined solely by lignin content but is influenced by changes in the quality of lignin due to delignification. Lignin quality affects the balance of the elastic potential to recover from deformation and its viscosity, which is an indication of resistance against flow.

References

  1. Goring DAI (1963) Thermal softening of lignin, hemicellulose. Pulp Pap Mag Can 64:517–527

    Google Scholar 

  2. Hillis WE, Rozsa AN (1978) The softening temperature of wood. Holzforschung 32:68–73

    Article  Google Scholar 

  3. Salmen L (1984) Viscoelastic properties of in situ lignin under water-saturated conditions. J Mater Sci 19:3090–3096

    Article  CAS  Google Scholar 

  4. Back EL, Salmen NL (1982) Glass transition of wood components hold implications for molding and pulping processes. TAPPI 65:107–110

    Google Scholar 

  5. Nakajima N, Furuta Y, Ishimaru Y (2008) Thermal-softening properties and cooling set of water-saturated bamboo within proportional limit. J Wood Sci 54:278–284

    Article  Google Scholar 

  6. Nakajima N, Furuta Y, Ishimaru Y, Okoshi M (2008) Cooling set of water-saturated bamboo under large deformation. J Wood Sci doi: 10.1007/s10086-008-1002-4

  7. Nakajima N, Furuta Y, Ishimaru Y, Okoshi M (2008) Characteristics of bamboo tissue in relation to cooling set. J Wood Sci doi: 10.1007/s10086-008-1003-3

  8. Minato K, Shimizu R, Kawaguchi S (2007) Contribution of lignin to the reactivity of wood in chemical modification I: influence of delignification on acetylation. J Wood Sci 53:218–222

    Article  CAS  Google Scholar 

  9. Minato K, Hosoo H, Kawaguchi S (2007) Contribution of lignin to the reactivity of wood in chemical modification II: influence of delignification on reaction with vaporous formaldehyde. J Wood Sci 53:255–257

    Article  CAS  Google Scholar 

  10. Fushitani M (1968) Effect of delignifying treatment on static viscoelasticity of wood II. Temperature dependence of stress relaxation in the water-saturated condition (in Japanese). Mokuzai Gakkaishi 14:18–23

    Google Scholar 

  11. Furuta Y, Nakajima M, Nakatani T, Kojiro K, Ishimaru Y (2008) Effects of lignin on the thermal-softening properties of water-swollen wood (in Japanese). Zairyou 57:344–349

    CAS  Google Scholar 

  12. Wang Y, Minato K, Iida I (2006) Mechanical properties of wood in an unstable state due to temperature changes, and an analysis of the relevant mechanism II. Selective and uniform elimination of chemical constituents from wood blocks (in Japanese). Mokuzai Gakkaishi 52:168–172

    Article  CAS  Google Scholar 

  13. Whiting P, Goring DAI (1981) The topochemistry of delignification shown by pulping middle lamella and secondary wall tissue from black spruce. J Wood Chem Technol 1:111–122

    Article  CAS  Google Scholar 

  14. Furuta F, Soma N, Obata Y, Kanayama K (2001) Research to make better use of wood as sustainable resource. Physical property change of wood due to heating and drying histories. Proceedings of the 4th International Conference on Materials for Resources, Akita, pp 260–265

  15. Olsson AM, Salmen L (1992) Viscoelasticity of in situ lignin as affected by structure. Softwood vs. hardwood. J Am Chem Soc 489:133–143

    CAS  Google Scholar 

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Authors and Affiliations

  1. Research Division of Agriculture, Graduate School of Kyoto Prefectural University, 1-5 Shimogamo-hangicho, Sakyo-ku, Kyoto, 606-8522, Japan

    Masamitsu Nakajima & Yutaka Ishimaru

  2. Research Division of Life and Environmental Sciences, Graduate School of Kyoto Prefectural University, Kyoto, 606-8522, Japan

    Yuzo Furuta & Makoto Ohkoshi

Authors
  1. Masamitsu Nakajima
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  2. Yuzo Furuta
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  3. Yutaka Ishimaru
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  4. Makoto Ohkoshi
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Correspondence to Masamitsu Nakajima.

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Nakajima, M., Furuta, Y., Ishimaru, Y. et al. The effect of lignin on the bending properties and fixation by cooling of wood. J Wood Sci 55, 258–263 (2009). https://doi.org/10.1007/s10086-009-1019-3

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  • DOI: https://doi.org/10.1007/s10086-009-1019-3

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