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Wood Science and Technology

, Volume 49, Issue 6, pp 1251–1268 | Cite as

Distribution of the equilibrium moisture content in four hardwoods below fiber saturation point with magnetic resonance microimaging

  • Leandro Passarini
  • Cédric Malveau
  • Roger E. HernándezEmail author
Original

Abstract

The distribution of liquid and bound water in wood samples under equilibrium moisture contents (EMC) below fiber saturation point (FSP) was assessed by magnetic resonance (MR) microimaging. Two Amazonian hardwoods, huayruro (Robinia coccinea) and cachimbo [Cariniana domesticata], a plantation grown eucalyptus (Eucalyptus saligna), and a temperate species red oak (Quercus rubra) were studied. Desorption tests were performed at 21 °C from full saturation state for huayruro, cachimbo, and red oak, and from green condition for eucalyptus. The EMC was reached under three desorption conditions [58, 76, and 90 % relative humidity (RH)]. MR microimages were obtained based on T 2 times and on 1H concentration. Scanning electron microscopy images helped us to interpret MR microimages. The results showed that wood structure plays a major role in liquid water drainage and in water diffusion. Eucalyptus saligna and red oak showed liquid water entrapped in parenchyma tissues, even below FSP (90 % RH). At this same RH level, all liquid water was, however, drained for cachimbo and huayruro. For these woods, bound water was not uniformly distributed in wood structure, concentrating it more in fibers for both species. Huayruro showed the highest heterogeneity in hygroscopicity, which is explained by its particular wood anatomy.

Keywords

Liquid Water Equilibrium Moisture Content Fiber Saturation Point Relative Humidity Condition Axial Parenchyma 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This research was supported by the Natural Sciences and Engineering Research Council of Canada.

References

  1. Almeida G (2006) Influence de la structure du bois sur ses propriétés physico-mécaniques à des teneurs en humidité élevées. (Influence of the wood structure on its physical and mechanical properties at high relative humidities). Ph.D. thesis, Université Laval, Québec, Canada (in French) Google Scholar
  2. Almeida G, Hernández RE (2006a) Changes in physical properties of tropical and temperate hardwoods below and above the fiber saturation point. Wood Sci Technol 40:599–613CrossRefGoogle Scholar
  3. Almeida G, Hernández RE (2006b) Changes in physical properties of yellow birch below and above the fiber saturation point. Wood Fiber Sci 38:74–83Google Scholar
  4. Almeida G, Hernández RE (2007) Dimensional changes of beech wood resulting from three different re-wetting treatments. Holz als Roh-und Werkstoff 65:193–196CrossRefGoogle Scholar
  5. Almeida G, Gagné S, Hernández RE (2007) A NMR study of water distribution in hardwoods at several equilibrium moisture contents. Wood Sci Technol 41:293–307CrossRefGoogle Scholar
  6. Almeida G, Leclerc S, Perré P (2008) NMR imaging of fluid pathways during drainage of softwood in a pressure membrane chamber. Int J Multiph Flow 34:312–321CrossRefGoogle Scholar
  7. Alzate SBA (2004) Caracterização da madeira de árvores de clones de Eucalyptus grandis, E. saligna e E. grandis x urophylla. (Wood characterization of Eucalyptus grandis, E. saligna, and E. grandis x urophylla clones). Ph.D. thesis, Universidade de São Paulo, Piracicaba, Brazil (in Portuguese) Google Scholar
  8. Araujo CD, MacKay AL, Hailey JRT, Whittall KP, Le H (1992) Proton magnetic resonance techniques for characterization of water in wood: application to white spruce. Wood Sci Technol 26:101–113CrossRefGoogle Scholar
  9. Araujo CD, MacKay AL, Whittall KP, Hailey JRT (1993) A diffusion model for spin–spin relaxation of compartmentalized water in wood. J Magn Reson B 101:248–261CrossRefGoogle Scholar
  10. Babiak M, Kúdela J (1995) A contribution to the definition of the fiber saturation point. Wood Sci Technol 29:217–226Google Scholar
  11. Barkas WW (1935) Fibre saturation point of wood. Nature 135:545CrossRefGoogle Scholar
  12. Brownstein KR (1980) Diffusion as an explanation of observed NMR behavior of water absorbed on wood. J Magn Reson 40:505–510Google Scholar
  13. Brownstein KR, Tarr CE (1979) Importance of classical diffusion in NMR studies of water in biological cells. Phys Rev A 19:2446–2453CrossRefGoogle Scholar
  14. Bucur V (2003) Techniques for high resolution imaging of wood structure: a review. Meas Sci Technol 14:R91–R98CrossRefGoogle Scholar
  15. Côté WA (1963) Structural factors affecting the permeability of wood. J Polym Sci C 2:231–242CrossRefGoogle Scholar
  16. Dvinskikh SV, Henriksson M, Berglund LA, Furo I (2011) A multinuclear magnetic resonance imaging (MRI) study of wood with adsorbed water: estimating bound water concentration and local wood density. Holzforschung 65:103–107CrossRefGoogle Scholar
  17. Goulet M, Hernández RE (1991) Influence of moisture sorption on the strength of sugar maple wood in tangential tension. Wood Fiber Sci 23:197–206Google Scholar
  18. Hameury S, Sterley M (2006) Magnetic resonance imaging of moisture distribution in Pinus sylvestris L. exposed to daily indoor relative humidity fluctuations. Wood Mater Sci Eng 1:116–126CrossRefGoogle Scholar
  19. Hart CA (1984) Relative humidity, EMC, and collapse shrinkage in wood. For Prod J 34(11/12):45–54Google Scholar
  20. Hart CA, Przestrzelski PJ, Wheeler FJ (1974) Entrapped lumen water in hickory during desorption. Wood Sci 6:356–362Google Scholar
  21. Hernández RE (2007a) Effects of extraneous substances, wood density and interlocked grain on fiber saturation point of hardwoods. Wood Mater Sci Eng 2:45–53CrossRefGoogle Scholar
  22. Hernández RE (2007b) Moisture sorption properties of hardwoods as affected by extraneous substances, wood density, and interlocked grain. Wood Fiber Sci 39:132–145Google Scholar
  23. Hernández RE, Bizoň M (1994) Changes in shrinkage and tangential compression strength of sugar maple below and above the fiber saturation point. Wood Fiber Sci 26:360–369Google Scholar
  24. Hernández RE, Cáceres CB (2010) Magnetic resonance microimaging of liquid water distribution in sugar maple wood below fiber saturation point. Wood Fiber Sci 42:259–272Google Scholar
  25. Hernández RE, Pontin M (2006) Shrinkage of three tropical hardwoods below and above the fiber saturation point. Wood Fiber Sci 38:474–483Google Scholar
  26. Hoffmeyer P, Engelund ET, Thygesen LG (2011) Equilibrium moisture content (EMC) in Norway spruce during the first and second desorptions. Holzforschung 65:875–882CrossRefGoogle Scholar
  27. Hsi E, Hossfeld R, Bryant RG (1977) Nuclear magnetic resonance relaxation study of water absorbed on milled Northern white cedar. J Colloid Interface Sci 62:389–395CrossRefGoogle Scholar
  28. IAWA Committee (1989) IAWA list of microscopic features for heartwood identification. Int Assoc Wood Anat Bull 10:219–332Google Scholar
  29. Jankowsky IP, Santos GRV (2005) Drying behaviour and permeability of Eucalyptus grandis lumber. Maderas. Ciencia y tecnología 7(1):17–21CrossRefGoogle Scholar
  30. Jankowsky IP, Santos GRV, Andrade A (2008) Secagem da madeira serrada de eucalipto (Drying behavior of eucalyptus lumber). Revista da Madeira 19:64–72 (In Portuguese) Google Scholar
  31. Jansen S, Pletsers A, Rabaey D, Lens F (2008) Vestured pits: a diagnostic character in the secondary xylem of myrtales. J Trop For Sci 20:328–339Google Scholar
  32. Kastler B (2011) Comprendre l’IRM: Manuel d’autoapprentissage (Understanding MRI: self-study manual), Masson, Paris, 2011 (in French) Google Scholar
  33. Meder R, Codd SL, Franich RA, Callaghan PT, Pope JM (2003) Observation of anisotropic water movement in Pinus radiata D. Don sapwood above fiber saturation using magnetic resonance micro-imaging. Holz als Roh-und Werkstoff 61:251–256CrossRefGoogle Scholar
  34. Menon RS, MacKay AL, Hailey JRT, Bloom M, Burgess AE, Swanson JS (1987) An NMR determination of the physiological water distribution in wood during drying. J Appl Polym Sci 33:1141–1155CrossRefGoogle Scholar
  35. Naderi N, Hernández RE (1997) Effect of a re-wetting treatment on the dimensional changes of sugar maple wood. Wood Fiber Sci 29:340–344Google Scholar
  36. Navi P, Heger F (2005) Comportement thermo-hydromécanique du bois (Thermo-hydro-mechanical behavior of wood), Presses Polytechniques et Universitaires Romandes, Switzerland (in French) Google Scholar
  37. Nzokou P, Kamdem DP (2004) Influence of wood extractives on moisture sorption and wettability of red oak (Quercus rubra), black cherry (Prunus serotina), and red pine (Pinus resinosa). Wood Fiber Sci 36:483–492Google Scholar
  38. Panshin AJ, de Zeeuw C (1980) Textbook of wood technology. Michigan State University, New YorkGoogle Scholar
  39. Passarini L, Malveau C, Hernández RE (2014) Water state study of wood structure of four hardwoods below fiber saturation point with NMR technique. Wood Fiber Sci 46:480–488Google Scholar
  40. Quick JJ, Hailey JRT, Mackay AL (1990) Radial moisture profiles of cedar sapwood during drying—a proton magnetic-resonance study. Wood Fiber Sci 22:404–412Google Scholar
  41. Ross RJ, Brashaw BK, Pellerin RF (1998) Nondestructive evaluation of wood. Forest Prod J 48:14–19Google Scholar
  42. Scurfield G, Silva SR (1970) The vestured pits of Eucalyptus regnans F.Muell.: a study using scanning electron microscopy. Bot J Linn Soc 63:313–320CrossRefGoogle Scholar
  43. Shmulsky R, Jones P (2011) Forest products and wood science, an introduction. Blackwell, AmesCrossRefGoogle Scholar
  44. Siau JF (1984) Transport processes in wood. Springer, BerlinCrossRefGoogle Scholar
  45. Siau JF (1995) Wood: influence of moisture on physical properties. Virginia Tech, BlacksburgGoogle Scholar
  46. Singh AP (1983) On the occurrence of anomalous tubular structures in the vestured pits of petiolar xylem in Eucalyptus delegatensis. IAWA Bull 4:239–243CrossRefGoogle Scholar
  47. Skaar C (1988) Wood–water relations. Springer, BerlinCrossRefGoogle Scholar
  48. Stamm AJ (1964) Wood and cellulose science. Ronald Press, New YorkGoogle Scholar
  49. Stamm AJ (1971) Review of nine methods for determining the fiber saturation point of wood and wood products. Wood Sci 4:114–128Google Scholar
  50. Stone JE, Scallan AM (1967) The effect of component removal upon the porous structure of the cell wall of wood II. Swelling in water and the fiber saturation point. Tappi 50:496–501Google Scholar
  51. Telkki V-V (2012) Wood characterization by NMR & MRI of fluids. eMagRes 1:215–222Google Scholar
  52. Thygesen LG, Elder T (2008) Moisture in untreated, acetylated, and furfurylated Norway spruce studied during drying using time domain NMR. Wood Fiber Sci 40:309–320Google Scholar
  53. Tiemann HD (1906) Effect of moisture upon the strength and stiffness of wood. USDA For Serv, Bull 70, Government Printing Office, Washington, DCGoogle Scholar
  54. Vermaas HF (1995) Drying eucalyptus for quality: material characteristics, pre-drying treatments, drying methods, schedules and optimisation of drying quality, South African. For J 174:41–49Google Scholar
  55. Watanabe Y, Sano Y, Asada T, Funada R (2006) Histochemical study of the chemical composition of vestured pits in two species of Eucalyptus. IAWA J 27:33–43CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Leandro Passarini
    • 1
  • Cédric Malveau
    • 2
  • Roger E. Hernández
    • 1
    Email author
  1. 1.Département des sciences du bois et de la forêt, Centre de recherche sur les matériaux renouvelablesUniversité LavalQuebecCanada
  2. 2.Laboratoire de RMN, Département de chimieUniversité de MontréalMontrealCanada

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