EFFECT OF SILICIC ACID ON BORON LEACHING IN PLYWOOD MANUFACTURE
DOI:
https://doi.org/10.48165/Keywords:
Boric acid, leachability, plywood, silicic acidAbstract
Boric acid is a well-known wood preservative and fire retardant having low mammalian toxicity. Its efficacy is affected as it is non-fixed type, water leachable and effective only in interior conditions. In present study the effect of silicic acid and treatment methods on permanency of boron in plywood was studied through leaching test. The plywood was treated with glue line treatment as well as veneer treatment method with boric acid and three combinations of boric acid and silicic acid (1:1, 2:1 and 3:1) at 2, 3 and 4% concentrations.With a view to explore the possibility of fixation of boric acid in combination with silicic acid, the treated samples were subjected to leaching and then boron content was analyzed in leached samples. The results showed that boron was easily leached from the samples treated with boric acid only; whereas the treatment with the combination of silicic acid improved boron fixation in samples. The results of two different treatment methods showed suitability of veneer treatment to achieve sufficient boron retention in plywood. However, the leaching of boron was also high in veneer treatment than glue line treatment method.
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Altun, S., Ozcifci A., Şenel A., Baysal, E. and Toker, H. 2010. Effects of silica gel on leaching resistance and thermal properties of impregnated wood. Wood Research, 55(4): 101-112. Anonymous. 1974. Specification for Synthetic Resin/Adhesives for Plywood (Phenolic and Amino plastic). IS: 848. Bureau of Indian standards, Bahadur Shah Zafar Marg, New Delhi, India. Anonymous. 1983. Specification for the Methods of Test for Plywood. IS: 1734. Bureau of Indian standards, Bahadur Shah Zafar Marg, New Delhi, India.
Anonymous. 1989. Plywood for General Purposes-Specification. IS: 303. Bureau of Indian standards, Bahadur Shah Zafar Marg, New Delhi, India.
Anonymous. 1991. Methods for Estimation of Preservatives in Treated. Timber and in Treating Solutions. IS: 2753, Bureau of Indian Standards. Bahadur Shah Zafar Marg, New Delhi, India. Anonymous. 2008. Method of Laboratory Testing of Wood Preservatives against Fungi. IS: 4873. Bureau of Indian Standards. Bahadur Shah Zafar Marg, New Delhi, India.
Anonymous. 2014. Silicone Resins – Hard, Insulating, Water-Repellent. Retrieved on 10 Nov., 2014. from http://www.chemiedidaktik.uniwuppertal.de/disido_cy/en/info/structure/resins.html. Anonymous. 2015. Boring Boron and Adhesives. Retrieved on 20 August 2015 from
http://www.adhesivesmag,com/articles/93226-boring-boron-and-adhesives. Baysal, E. and Yalinkilic, M.K. 2005. A new boron impregnation technique of wood by vapor boron of boric acid to reduce leaching boron from wood. Wood Science Technology, 39: 187-198. Caldeira, F. 2010. Boron in wood preservation: A review in its physicochemical aspects. Silva Lusitana, 18(2):179-196.
Furuno, T. and Imamura, Y. 1998. Combinations of wood and silicate. Part 6: Biological resistance of wood-mineral composites using water glass-boron compound system. Wood Science and Technology, 32: 161-170.
Gardner, D.J., Tascioglu, C. and Wålinder, M.E. 2003. Wood composite protection. pp. 399-419. In: Wood Deterioration and Preservation: Advances in Our Changing World (eds. B. Nicholas and J.P. Schultz). ACS Symposium Series 845, American Chemical Society, Washington, USA.
Humphrey, D.G., Duggan, P.J., Tyndall, E.M., Carr, J.M. and Cookson, L.J. 2002. New boron-based biocides for the protection of wood. pp. 1-11. In: The Conference of the International Research Group on Wood Preservation. IRG/WP Document No. 02-30283, 12-17 May 2002, Cardiff, Wales, UK [https://www.irg-wp.com/irgdocs/details.php?77808c5f-88c1-4985-a021- 51d286e8bedf].
Kartal, S.N., Yashimura, T. and Imamura, Y. 2009. Modification of wood with Si compounds to limit boron leaching from treated wood and to increase termite and decay resistance. International Biodeterioration and Biodegradation, 63(2): 187-190.
Kirkpatrick, J.W. and Barnes, H.M. 2006. Biocide treatments for wood composites – A review. pp. 1-21. In: The Conference of the International Research Group on Wood Preservation. IRG/WP Document No. 06-40323, 18-22 May 2006, Tromso, Norway. [https://www.irg wp.com/irgdocs/details.php?2ee445e3-1ba5-4de8-952c-8d3bdc2b1193].
Kose, C., Terzi, E., Kartal, S.N., Erilkun, B. and Imamura, Y. 2011. Preliminary evaluation of boron release and biological resistance of wood treated with disodium octoborate tetrahydrate (DOT) and a water-repellent compound. African Journal of Biotechnology, 10(10): 1833-1839.
Lesar, B., Budija, F., Kralj, P., Patric, M. and Humar, M. 2012. Leaching of boron from wood impregnated with preservative solutions based on boric acid and liquefied wood. Holz-als Roh und werkstoff, 70(1): 365-367.
Lin, L. and Furuno, T. 2001. Biological resistance of wood-metaborate composites using the borax solution system. pp. 1-24. In: The Conference of the International Research Group on Wood Preservation. IRG/WP Document No. 01-30259, 20-25 May 2001, Nara, Japan. [https://www.irg-wp.com/irgdocs/details.php?c0897f74-ee25-41aa-b88d-e3ab57db6054].
Loth, H., Schmidt, O., Schmidt, J., Beck, H. and Sumser, M. 2008. Silane-Crosslinking Adhesive, Sealant or Coating with a Silicic Acid Filler and Use Thereof. United States Patent Application 20080245476. Patent publication date 9.10.2008. [https://patentimages.storage.googleapis. com/49/bc/9a/005da76ed9c197/US20080245476A1.pdf].
Shweta Bhatt and Sadhna Tripathi
Luo, J., Chen, H. and Morrell, J.J. 2005. Effect of borate on uptake and efficacy of an anti-sap stain treatment. pp. 1-11. In: The Conference of the International Research Group on Wood Preservation. IRG/WP Document No. 05-30380, 24-28 April 2005, Bangalore, India. [https://www.irg-wp.com/irgdocs/details.php?19cb4e52-f97c-424f-8139-8205124f6825].
Mahltig, B., Swaboda, C., Roessler, A. and Böttcher, H. 2008. Functionalising wood by nanosol application. Journal of Material Chemistry, 18: 3180-3192.
Mazela, B., Bartkowiak, M. and Ratajczak, I. 2007. Animal protein impact on fungicidal properties of treatment formulations. Wood Research, 52(1): 13-22.
Nair, S. S. 2006. Effectiveness of Copper-Boron Diffusion Treatments for Wood. M. Sc. thesis. College of Graduate Studies University of Idaho, Moscow, Russia.
Pallaske, M. 2004. Chemical wood protection: Improvement of biocides in use. pp. 1-11. In: COST Action E22 - Environmental Optimisation of Wood Protection, 22-23 March 2004, Lisboa, Portugal.’
Schoeman, M.W. and Lloyd, J.D. 1998. International standardization: A hypothetical case study with stand-alone borate wood preservatives. In: The Conference of the International Research Group on Wood Preservation. IRG/WP Document No. 98-20381407, IRG Secretariat, Stockholm Sweden.
Thevenon, M.F. and Pizzi, A. 2003. Poly-borate ions influence the durability of wood treated with non-toxic protein borate preservatives. Holz als Roh-und Werkstoff, 61: 457-464. Tondi, G., Weiland, S., Lemenager, N., Petutschnigg, A., Pizzi, A. and Thevenon, M.F. 2012. Efficacy of tannins in fixing boron in wood: Fungal and termite resistance. Bioresource, 7(1): 1238-1252.
Ueda, S. 1993. Jikken Kagaku Kouza (Text of Experimental Chemistry). (4th edn.), Maruzen Co. Ltd., Tokyo, Japan.
Waldron, L., Cooper, P. A. and Ung, T.Y. 2005. Prediction of long-term leaching potential of preservative-treated wood by diffusion modelling. Holzforschung, 59: 581-588 Yamaguchi, H. 2001. Silicic acid-boric acid complexes as wood preservatives. In: The Conference of the International Research Group on Wood Preservation. IRG/WP Document No. 01-30273, 20-258 May 2001, Nara, Japan [https://www.irg-wp.com/irgdocs/details.php?ac7e7f6b-5e20- 4028-bd12-d8fa95fb5bfd].
Yamaguchi, H. 2002. Low molecular weight silicic acid- inorganic compound complex as wood preservative. Wood Science and Technology, 36(5): 399-417.
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