Effect of chemical modification on dimensional stability of Pinus radiata D. Don using acetic anhydride

https://doi.org/10.17221/13/2020-JFSCitation:Hom S.K., Ganguly S., Bhoru Y.U., Samani A. (2020): Effect of chemical modification on dimensional stability of Pinus radiata D. Don using acetic anhydride. J. For. Sci., 66: 208-217.
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Chemical modification is used to efficiently improve some properties of wood to make it suitable for specific end uses. Modification using acetic anhydride (AA) is found suitable to make the wood more stable dimensionally. Pinus radiata wood samples treated with pyridine catalyzed AA were exposed to four different treatment methods comprising vacuum dipping and full cell method (cured with and without chemical). Physical properties like weight percentage gain (WPG), bulking coefficient, swelling coefficient (S) due to the chemical, water absorption and anti-swelling efficiency (ASE) were assessed for a comparative analysis. Results indicated a significant reduction in water absorption of acetylated wood. The swelling coefficients of all the treatments were found in the range of 3.86–4.96, which was twice to three times less than in the control (11.72) attributing 55–64% improvement in dimensional stability. Samples treated with full cell method and cured in the chemical mixture showed minimum swelling coefficient and best anti-swelling efficiency. All the four treatment methods chosen for the study returned significantly better dimensional stability as compared to untreated wood.

References:
Ajdinaj D., Lato E., Quku D., Cota H. (2013): Modification of some Albanian wood properties through chemical treatment. International Journal of Physical Sciences, 8: 356–361.
 
Chai Y., Liu J., Wang Z., Zhao Y. (2017): Dimensional stability and mechanical properties of plantation poplar wood esterified using acetic anhydride. BioResource, 12: 912–922.
 
Lehringer C., Schwarze F.W.M.R., Militz H. (2009): A review on promising approaches for liquid permeability improvement in softwoods. Wood and Fiber science, 41: 373–385.
 
Devi R.R., Maji T.K. (2012): Chemical modification of Semul with styrene acrylonitrile co-polymer and organically modified nanoclay. Wood Science and Technology, 46: 299–315. https://doi.org/10.1007/s00226-011-0406-2
 
Donath S., Militz H., Mai C. (2004): Wood modification with alcoxysilanes. Wood Science and Technology, 38: 555–566. https://doi.org/10.1007/s00226-004-0257-1
 
Hansmann C., Weichslberger G., Gindl W. (2005): A two-step modification treatment of solid wood by bulk modification and surface treatment. Wood Science and Technology, 39: 502–511. https://doi.org/10.1007/s00226-005-0002-4
 
Forestry Corporation (2016): Radiata pine ‘the remarkable pine’. Forest Facts No. 4 Edition 3. New South Wales, Forestry Corporation: 3. Available at https://www.forestrycorporation.com.au/__data/assets/pdf_file/0017/420920/forest-fact-radiata-pine.pdf
 
Hill C.A.S. (2006): Wood Modification: Chemical, Thermal and Other Processes. Chichester, John Wiley and Sons: 260.
 
Hill C.A.S. (2007): Acetylated wood – the science behind the material. Available at http://www.accoya.com/wp-content/uploads/2011/05/Acetylated-wood.pdf.
 
Hom S.K. (2019): Energy Simulation Studies of Chemically Modified Wood enveloped Building. [PhD. Thesis.] Dehradun, Forest Research Institute, Uttarakhand.
 
Lahtela V., Hämäläinen K., Kärki T. (2014): The effects of preservatives on the properties of wood after modification (review paper). Baltic Forestry, 20: 189–203.
 
Matsuda H. (1987): Preparation and utilization of esterified woods bearing carboxyl groups. Wood Science and Technology, 21: 75–88.
 
Midgley S., Lal P., Bhojvaid P., Brown A. (2007): A Strategy for Developing Market Opportunities for Australian Forest Products in India: A Report to the Forest Industries Branch Department of Agriculture, Fisheries and Forestry. Canberra, Salwood Asia Pacific Pty Ltd.: 40.
 
Messner K., Bruce A., Bongers H.P.M. (2003): Treatability of refractory wood species after fungal pre-treatment. In: European Conference on Wood Modification (ECWM), Ghent, April 3–4, 2003: 398–401.
 
Obataya E., Yamauchi, H. (2005): Compression behaviors of acetylated wood in organic liquids Part II drying set and its recovery. Wood Science and Technology, 39: 546–559. https://doi.org/10.1007/s00226-005-0019-8
 
Pandey K.K., Jayashree, Nagaveni H.C. (2009): Study of dimensional stability, decay resistance and light stability of Phenylisothiocynate modified Rubberwood. Bio Resources 4: 257– 267.
 
Rowell R.M. (1982): Distribution of acetyl groups in southern pine reacted with acetic anhydride. Wood Science, 15: 172–182.
 
Rowell R.M. (1983): Chemical modification of wood. Forest Product Abstracts, 6: 363–382.
 
Rowell R.M. (2005a): Chemical modification: A nontoxic approach to wood preservation. Drewno-wood, 48: 111–117.
 
Rowell R.M. (2005b): Chemical Modification of Wood. Handbook of Wood Chemistry and Wood Composite. Boca Raton, CRC Press: 381–420.
 
Rowell R.M., Ellis W.D. (1978): Determination of dimensional stabilization of wood using water- soaked method. Wood Science, 13: 104–111.
 
Singh D., Dev I., Kumar S. (1992): Chemical modification of wood with acetic anhydride. Journal of the Timber Development Association of India, 38: 5–8.
 
Tarkow H., Stam A.J., Erickson E.C.O. (1955): Acetylated Wood. Aircraft design, FPL. Madison, U.S. Department of Agriculture, Forest Service, Forest Products Laboratory: 30.
 
Wang J.Z., DeGroot R. (1996): Treatability and durability of heartwood. In: National conference on wood transportation structures. U.S. Department of Agriculture, Forest Service, Forest Products Laboratory Madison, October 23–25, 1996: 252–260.
 
Yan Y., Dong Y., Chen H., Zhang S., Li J. (2014): Effect of catalysts and sodium hydroxide on glyoxal-treated wood. BioResources, 9: 4540–4551. https://doi.org/10.15376/biores.9.3.4540-4551
 
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