Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Pore Characterization in Cross Section of Yellow Poplar (Liriodendron tulipifera) Wood

  • Jang, Eun-Suk (Department of Housing Environmental Design, and Research Institute of Human Ecology, College of Human Ecology, Chonbuk National University) ;
  • Kang, Chun-Won (Department of Housing Environmental Design, and Research Institute of Human Ecology, College of Human Ecology, Chonbuk National University) ;
  • Jang, Sang-Sik (Department of Wood Science Technology, College of Agriculture & Life Science, Chungnam National University)
  • Received : 2018.06.01
  • Accepted : 2018.12.21
  • Published : 2019.01.25
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Abstract

This study was conducted to analyze the pore structure of Yellow poplar. Cross-sectional surfaces of heartwood and sapwood of Yellow poplar (Liriodendron tulipifera) were observed by SEM, and the true density of the heartwood, intermediate wood and sapwood were measured by gas pycnometery, while gas permeability and pore size of heartwood, intermediate wood and sapwood were measured by capillary flow porometery. The pores were classified as through pore, blind pore and closed pore. It was determined that the permeability was increased due to the content and size of through pore being increased although the total porosity of specimen showed slight difference from pith to bark. The content of through pore porosity was 33.754 % of heartwood and 47.810 % of sapwood, showed an increasing trend from pith to bark, however, those for the blind pore porosity and closed pore porosity were 27.890 % and 19.492 % for heartwood and 19.447 % and 4.660 % for sapwood, showed a decreasing trend from pith to bark. The max pore size of specimens was increased by about 5 times from $5.927{\mu}m$ to $31.334{\mu}m$, and mean flow pore size was increased by about 315 times from $0.397{\mu}m$ to $12.437{\mu}m$ from pith to bark.

Keywords

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Fig. 1. Preparation of Yellow poplar specimens.

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Fig. 2. Schematic diagram of Helium gas intrusion during gas pycnometer measuring.

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Fig. 3. The principle of separation of the pore types of wood specimens.

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Fig. 4. The schematic diagram of gas permeability.

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Fig. 5. The principal of capillary flow porometry using a capillary flow porometer.

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Fig. 6. SEM images on the cross sectional surface of Yellow poplar.

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Fig. 7. The results of Darcy permeability (H: heartwood, M: intermediate wood, S: sapwood).

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Fig. 8. Bulk and true density of Yellow poplar (H: heartwood, M: intermediate wood, S: sapwood).

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Fig. 9. Distribution of wood substance, through pore porosity, blind pore porosity and closed pore porosity of Yellow poplar (a : Heartwood, b : Intermediate wood, c: Sapwood).

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Fig. 10. Max pore size and mean flow pore size of Yellow poplar measured by capillary flow porometer (H: heartwood, M: intermediate wood, S: sapwood).

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Fig. 11. Correlation between gas permeability and total porosity, through pore size, max pore size and mean flow pore size in Yellow poplar.

Table 1. The results of pore analysis of Yellow poplar (H: heartwood, M: intermediate wood, S: sapwood)

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References

  1. ASTM C-604-02. 2012. Standard test method for true specific gravity of refractory materials by gascomparison pycnometry.
  2. ASTM D2638-10. 2015. Standard test method for real density of calcined petroleum coke by Helium pycnometer.
  3. ASTM D4892-89. 2004. Standard test method for density of solid pitch (Helium Pycnometer Method) - Committee D02 on Petroleum Products and Lubricants.
  4. ASTM F316-03. 2011. Standard test methods for pore size characteristics of membrane filters by bubble point and mean flow pore test.
  5. Chen, P.Y., Tang, Y.F. 1991. Variation in longitudinal permeability of three US hardwoods. Forest Products Journal 41(11-12): 79-83.
  6. Fogg, P.J., Choong, E.T. 2007. Effect of specimen length on longitudinal gas permeability in hardwoods. Wood and Fiber Science 21(1): 101-104.
  7. Halisch, M., Vogt, E., Muller, C., Cano-Odena, A., Pattyn, D., Hellebaut, P., van der Kamp, K. 2013. Capillary flow porometry-assessment of an alternative method for the determination of flow relevant parameters of porous rocks. In Proceedings of International Symposium of the Society of Core Analysts, Napa Valley, California, USA, 16-19.
  8. Hur, J-Y., Kang, H-Y. 1997. Measurement of longitudinal liquid permeability using pressure bomb method. Journal of the Korean Wood Science and Technology 25(3): 66-74
  9. ISO 5106. 1997. Shaped insulating refractory products - Determination of bulk density and true porosity
  10. IUPAC. 1972. Manual of symbols and terminology for physico-chemical quantities and units, Appendix II; Part I: Definitions, terminology and symbols in colloid and surface chemistry. Pure and Applied Chemistry 31: 579-638.
  11. Jang, E.-S., Kang, C.-W., Jang, S.-S. 2018. Comparison of the Mercury Intrusion Porosimerty, Capillary Flow Porometry and Gas Permeability of Eleven Species of Korean Wood. Journal of the Korean Wood Science and Technology 46(6): 681-691. https://doi.org/10.5658/WOOD.2018.46.6.681
  12. Jang, E.-S., Kang, C.-W., Kang, H.-Y., Jang, S.-S. 2018. Sound Absorption Property of Traditional Korean Natural Wallpaper (Hanji). Journal of the Korean Wood Science and Technology 46(6): 703-712. https://doi.org/10.5658/WOOD.2018.46.6.703
  13. Kang, C.-W, Jang, E.-S, Jang, S.-S, Kang, H.-Y, Li, Chengyuan, Choi, I,-G. 2018. Changes of Air Permeability and Moisture Absorption Capability of the Wood by Organosolv Pretreatment. Journal of the Korean Wood Science and Technology 46(6): 637-644. https://doi.org/10.5658/WOOD.2018.46.6.637
  14. Kang, C.-W., Lee, Y.-H., Kang, H.-Y., Kang, W., Xu, H., Chung, W.-Y. 2011. Radial variation of sound absorption capability in the cross sectional surface of Yellow poplar wood. Journal of the Korean Wood Science and Technology 39(4): 326-332. https://doi.org/10.5658/WOOD.2011.39.4.326
  15. Kang, C.-W., Li, C., Jang, E.-S., Jang, S.-S., Kang, H.-Y. 2018. Changes in sound absorption capability and air permeability of Malas (homaliumfoetidum) specimens after high temperature heat treatment. Journal of the Korean Wood Science and Technology 46(2): 149-154. https://doi.org/10.5658/WOOD.2018.46.2.149
  16. KS F 2198. 2016. Determination of density and specific gravity of wood
  17. KS F 2199. 2016. Determination of moisture content of wood
  18. Lee, M-R., Eom Y-G. 2011. Comparative wood anatomy of stem and root in Korean-grown Yellow-poplar (Liriodendron tulipipfera L.). Journal of the Korean Wood Science and Technology 39(5): 406-419. https://doi.org/10.5658/WOOD.2011.39.5.406
  19. Lee, H-W. 2016. Size reduction characteristics of yellow poplar in a laboratory knife mill. Journal of the Korean Wood Science and Technology 44(2): 166-171. https://doi.org/10.5658/WOOD.2016.44.2.166
  20. Lim, A-J., Oh, J-K., H-M, Yeo., Lee, J-J. 2010. Feasibility of domestic Yellow poplar (Liriodendron tulipifera) Dimension Lumber for Structural Uses. Journal of the Korean Wood Science and Technology 38(6): 470-479. https://doi.org/10.5658/WOOD.2010.38.6.470
  21. Oh, K.-K., Lee, P-W. 1998. Development and application of image analysis program for investigation of pore characteristics in transverse surface of hardwoods. Journal of the Korean Wood Science and Technology 26(2): 29-37.
  22. Stamm, A.J. 1931. Three methods of studying capillary structure as applied to wood. Physics 1(2): 116-128. https://doi.org/10.1063/1.1744989
  23. Stayton, C.L., Hart, C.A. 1965. Determining pore-size distribution in softwoods with a mercury porosimeter. Forest Products Journal 15(10): 435-440.
  24. Washburn, E. 1921. Note on a method of determining the distribution of pore sizes in a porous material. proceedings of the National Academy of Sciences of the United States of America 7(4): 115-6. https://doi.org/10.1073/pnas.7.4.115