تأثیر قارچ رنگین‌کمان (Trametes versicolor (L.) Lloyd) بر ویژگی‌های فیزیکی و مکانیکی چوب دو گونه صنوبر (Populus spp)

نوع مقاله : علمی- پژوهشی

نویسندگان

1 استادیار، مؤسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

2 نویسنده مسئول، استادیار، مؤسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

چکیده

پژوهش پیش‌‌رو با هدف ارزیابی تأثیر قارچ رنگین‌کمان (Trametes versicolor (L.) Lloyd) بر ویژگی‌های فیزیکی و مکانیکی چوب دو گونه صنوبر شامل دلتوئیدس (Populus deltoides Marshall) و نیگرا (P. nigra L) در دو حالت شاهد و اصلاح‌شده انجام شد. از تیمار حرارتی نیز برای اصلاح نمونه‌های چوبی استفاده شد. نمونه‌های چوبی شاهد و اصلاح‌شده صنوبر، 16 هفته تحت تأثیر قارچ رنگین‌کمان قرار گرفتند. سپس، ویژگی‌های آن‌ها شامل مقدار لاکاز تولیدشده توسط قارچ، کاهش وزن ناشی از تأثیر قارچ و نیز تغییرات چگالی، مقاومت به ضربه و مقاومت فشاری موازی الیاف تحت اثرات قارچ و فرایند اصلاح اندازه‌گیری شدند. براساس نتایج به‌دست‌آمده، اثرگذاری آنزیم لاکاز در نمونه‌های شاهد، بیشتر از نمونه‌های اصلاح‌شده بود که سبب کاهش وزن بیشتری در نمونه‌های شاهد شد. همچنین، اصلاح حرارتی موجب کاهش چگالی، کاهش مقاومت به ضربه و افزایش مقاومت فشاری موازی الیاف در هر دو گونه شد. ارزیابی ویژگی‌های فیزیکی و مکانیکی نمونه‌های چوبی قرارگرفته در معرض قارچ رنگین‌کمان نیز نشان داد که اصلاح حرارتی سبب محدودیت عملکرد این قارچ در هر دو گونه می‌شود. به‌طوری‌که مقدار افت ویژگی‌های فیزیکی و مکانیکی مورد مطالعه شامل کاهش وزن، چگالی، مقاومت فشاری موازی الیاف و مقاومت به ضربه در نمونه‌های شاهد به‌طور معنی‌داری بیشتر از نمونه‌های اصلاح‌شده بود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Influence of Trametes versicolor (L.) Lloyd on physical and mechanical properties of two poplar wood species (Populus spp.)

نویسندگان [English]

  • S.M. Zamani 1
  • R. Hajihassani 2
  • K. Salehi 1
1 Assistant Prof., Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran
2 Corresponding author, Assistant Prof., Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran
چکیده [English]

The aim of this study was to evaluate the effect of white rot fungus (Trametes versicolor (L.) Lloyd) on physical and mechanical properties of treated and untreated poplar wood (Populus deltoides Marshall and P. nigra L.). Heat treatment was used as wood modification. Heat-treated and untreated poplar wood specimens were evaluated after exposing to the white rot fungus for 16 weeks. The evaluated properties was included: laccase activity, mass loss, density changes, impact strength and compression strength parallel to grain due to thermal modification and also fungus efficiency. Evaluation of lacase activity showed more efficiency of this enzyme in controls in compared to modified specimens in which also caused more mass loss. In both two poplar wood species, thermal modification reduced the density and the impact strength of the specimens, but improved the compression strength parallel to grain. Evaluation of physical and mechanical properties of the specimens exposed to white rot fungus also showed that thermal modification limits efficiency of this fungus on both poplar wood species. As a result, the reductions in the studied physical and mechanical properties, including mass loss, density, compression strength parallel to grain, and impact strength, were significantly more pronounced in the control group than the modified specimens.

کلیدواژه‌ها [English]

  • Laccase
  • thermal modification
  • white rot fungus
  • wood

مراجع

- American Society for Testing of Materials (ASTM), 2014. ASTM D143-09, Standard Methods of Testing Small Clear Specimens of Timber. Philadelphia, USA.
- American Society for Testing of Materials (ASTM), 2018. ASTM D256, Standard Test Methods for Determining the Izod Pendulum Impact Strength of Plastics. Philadelphia, USA.
- Ayata, U., Akcay, C. and Esteves, B., 2017. Determination of decay resistance against Pleurotus ostreatus and Coniophora puteana fungus of heat-treated scotch pine, oak and beech wood species. Maderas, Ciencia y Tecnologí, 19(3): 309-316.
- BS EN, 1997. BS EN 113: Wood Preservatives—Test Method for Determining the Protective Effectiveness Against Wood Destroying Basidiomycetes. European Committee for Standardization, Brussels, Belgium.
- Corleto, R., Gaff, M., Niemz, P., Sethy, A.K., Todaro, L., Ditommaso, G. and Kamboj, G., 2020. Effect of thermal modification on properties and milling behaviour of African padauk (Pterocarpus soyauxii Taub.) wood. Journal of Materials Research and Technology, 9(4): 9315-9327.
- Ferraz, A., Córdova, A.M. and Machuca, A., 2003. Wood biodegradation and enzyme production by Ceriporiopsis subvermispora during solid-state fermentation of Eucalyptus grandis. Enzyme and Microbial Technology, 32(1): 59-65.
- Field, J.A., de Jong, E., Feijoo-Costa, G. and de Bont, J.A.M., 1993. Screening for ligninolytic fungi applicable to the biodegradation of xenobiotics. Trends in Biotechnology, 11: 44-49.
- Gaff, M., Babiak, M., Kačík, F., Sandberg, D., Turčani, M., Hanzlík, P. and Vondrová, V., 2019. Plasticity properties of thermally modified timber in bending – the effect of chemical changes during modification of European oak and Norway spruce. Composites Part B: Engineering, 165(5): 613-625.
- Gao, H., Sun, M.Y., Cheng, H.Y., Gao, W.L. and Ding, X.L., 2016. Effects of heat treatment under vacuum on properties of poplar. BioResources, 11(1): 1031-1043.
- Ghorbani, M., Nikkhah Shahmirzadi, A. and Toopa, A., 2020. Effect of densification on the practical properties of chemical and thermal modified poplar wood. Iranian Journal of Wood and Paper Industries, 11(2): 185-197 (In Persian with English summary).
- González-Peña, M.M. and Hale, M.D.C., 2007. The relationship between mechanical performance and chemical changes in thermally modified wood. In: Proceedings of the 3rd European Conference on Wood Modification. Cardiff, UK, 15-16 Oct. 2007: 169-172.
- González-Peña, M.M., Breese, M.C. and Hill, C.A.S., 2004. Hygroscopicity in heat-treated wood: effect of extractives. In: Proceedings of the First International Conference on Environmentally-Compatible Forest Products (ICECFOP1). Oporto, Portugal, 22-24 Sep. 2004: 105-119.
- Kamperidou, V., 2019. The biological durability of thermally- and chemically-modified black pine and poplar wood against basidiomycetes and mold action. Forests, 10(12): 1111.
- Kaygin, B., Gunduz, G. and Aydemir, D., 2009. The effect of mass loss on mechanic properties of heat-treated paulownia wood. Wood Research, 54(2): 101-108.
- Kozakiewicz, P., Drożdżek, M., Laskowska, A., Grześkiewicz, M., Bytner, O., Radomski, A., … and Zawadzki, J., 2020. Chemical composition as factor affecting the mechanical properties of thermally modified black poplar (Populus nigra L.). BioResources, 15(2): 3915-3929.
- Lengowski, E.C., Bonfatti Júnior, E.A., Nisgoski, S., Bolzon de Muñiz, G.I. and Klock, U., 2021. Properties of thermally modified teakwood. Maderas. Ciencia y tecnología, 23(10): 1-16.
- Mburu, F., Dumarçay, S., Huber, F., Petrissans, M. and Gérardin, P., 2007. Evaluation of thermally modified Grevillea robusta heartwood as an alternative to shortage of wood resource in Kenya: Characterisation of physicochemical properties and improvement of bio-resistance. Bioresource Technology, 98(18): 3478-3486.
- Militz, H., 2002. Thermal treatment of wood, European processes and their background. IRG/WP 02-40241. Proceedings of the 33rd Annual Meeting of the International Research Group on Wood Preservation, Cardiff, Wales, UK, 12-17 May 2002: 17p.
- Obataya, E. and Tomita, B., 2002. Hygroscopicity of heat-treated wood II : reversible and irreversible reductions in the hygroscopicity of wood due to heating. Mokuzai Gakkaishi, 48: 288-295.
- Tomak, E.D., Ustaomer, D., Yildiz, S. and Pesman, E., 2014. Changes in surface and mechanical properties of heat treated wood during natural weathering. Measurement, 53(5): 30-39.
- Wentzel, M., Fleckenstein, M., Hofmann, T. and Militz, H., 2019. Relation of chemical and mechanical properties of Eucalyptus nitens wood thermally modified in open and closed systems. Wood Material Science & Engineering, 14(3): 165-173.
- Yildiz, S., Tomak, E.D., Yildiz, U.C. and Ustaomer, D., 2013. Effect of artificial weathering on the properties of heat treated wood. Polymer Degradation and Stability, 98(8): 1419-1427.
 

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