Effect of Supercritical Carbon Dioxide Treatment on Gas Permeability of Paulownia Fortunei Heartwood and Sapwood
Keywords:Paulownia fortunei, tyloses, permeability, supercritical carbon dioxide
Many wood species are resistant to penetration of liquids. Impermeability can affect a variety of properties including the ability to deliver preservatives, adhesive bonding, and coating applications. Developing methods for altering this characteristic could help in utilization of impermeable species. One method for altering wood properties is through the use of supercritical carbon dioxide (SC-CO2) which can solubilize a wide range of organic compounds. In this report, we examined the ability of varying SC-CO2 conditions to improve the permeability of Paulownia fortunei. All of the processes tested improved gas permeability and most reduced the frequency of tyloses in the vessels. The results suggest that SC-CO2 could be used to modify the permeability of this species.
Comstock GL (1970) Directional permeability of softwoods. Wood Fiber Sci 1:283-289.
Comstock GL (1967) Longitudinal permeability of wood to gases and non-swelling liquids. Forest Prod J 17(10):41-46.
Comstock GL (1965) Longitudinal permeability of green eastern hemlock. Forest Prod J 15(10):441-449.
Comstock GL, Coté, Jr. W (1968) Factors affecting the permeability and pit aspiration in coniferous sapwood. Wood Sci Technol 2:279-291.
Coté Jr. W.A. (1963) Structural factors affecting the permeability of wood. J Polym Sci (Part C) 2:231-242.
McHugh MA, Krukonis VJ (1994) Supercritical fluid extraction: principles and practice. Butterworth-Heinemann, Stoneworth, MA.
Milota MR, Tschernitz JL, Verrill S P, Mianowski T (1995) Gas permeability of plantation loblolly pine. Wood Fiber Sci 27(1): 34-40.
Sahle Demessie E, Hasan A, Levien KL, Kumar S, Morrell JJ (1995) Supercritical carbon dioxide treatment: effect on permeability of Douglas-fir heartwood. Wood Fiber Sci 27:296-300.
Schneider PF, Morrell JJ, Levien KL (2005) Internal pressure development during supercritical fluid impregnation of wood. Wood Fiber Sci 37(3):413-423.
Schneider PF, Levien KL, Morrell JJ (2006) Effect of wood characteristics on pressure responses during supercritical carbon dioxide treatment. Wood Fiber Sci 38(4):660-671.
Siau JF (1971) Flow in wood. Syracuse University Press, Syracuse, NY.
Stamm AJ (1963) Permeability of wood to fluid. Forest Prod J 13:503-507.
Taghiyari HR, Oladi R, Miri-Tari SM, Habibzade S (2014) Effects of diffusion drying schedules on gas and liquid permeability in Paulownia fortunei wood. Bosque 35(1):101-110
Tang RC, Carpenter SB, Wittwer RF, Graves DH (1980) Paulownia- a crop tree for wood products and reclamation of surface-mined land. Southern Journal of Applied Forestry 4:19-24.
Thomas RJ, Nicholas DD (1966) Pit membrane structure on loblolly pine as influenced by solvent exchange drying. Forest Prod J 16(3):53-56.
Togovnikov G, Vinden P (2010) Microwave wood modification technology and its applications. Forest Prod J 60(2):173-182.
Xiao ZP, Lu XN, Lu JS (2009) Effect of supercritical CO2 treatment on wood permeability. Journal of Fujian College of Forestry 2009-02.
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