Fungal Decay Resistance of Wood Treated With Organotin (IV) Complexes

Lai, Jai Jen (2009) Fungal Decay Resistance of Wood Treated With Organotin (IV) Complexes. [Final Year Project Report] (Unpublished)

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Abstract

Wood decay occurs naturally in the environment due to biodegradation by wood decaying fungi. It is important to protect wood from decay in order to prolong the service life of timber. Wood preservatives had long been developed but most cause environmental concern and are dangerous to human. New and environmental friendly preservatives are needed more than ever. In this study, four newly synthesized organotin (IV) complexes, namely diphenyltin (IV) complex, methyltin (IV) complex, butyltin (IV) complex, pbenyltin (IV) complex, and a ligand, Thiophene-2-Carboxaldehyde benzhydrazone were used to treat rubberwood (Hevea brasiliensis). The rubberwood cubes were subsequently exposed to three wood decaying fungi. Gloeophy/lum trabeum, Colorius versicolor and Chaetomium globosom through soil block test and UDSteri1e soil-burial test for 12 weeks. The retention of ligand and organotin (IV) complexes were analyzed using Fourier Transform Infrared Spectroscopy (FTIR) to determine the treatability and retention of preservatives on rubberwood. Rubberwood treated with ligand showed the highest retention of 159.75 kg/m3 at 1000 ppm, while the lowest retention were 32.45 kg/m3 at 1000 ppm for rubberwood treated with diphenyltin (IV) complex. The result showed that the organotin (IV) complexes gave better protection to rubberwood from decay fungus Gloeophyllum trabeum.

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