PHYSICO-CHEMICAL AND MECHANICAL PROPERTIES OF THERMALLY MODIFIED WOOD OF Pinus roxburghii SARGENT

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dc.contributor.advisorBHUPENDER, DUTT
dc.contributor.authorGUPTA, AMAN
dc.date.accessioned2019-11-23T06:39:39Z
dc.date.available2019-11-23T06:39:39Z
dc.date.issued2019-11
dc.description.abstractABSTRACT The present research entitled “Physico-chemical and mechanical properties of thermally modified wood of Pinus roxburghii Sargent” was carried out in the Laboratory and Wood Workshop in the Department of Forest Products, College of Forestry, Dr Y S Parmar University of Horticulture and Forestry, Nauni, Solan (HP) during 2017-18 and 2018-19. Thermal modification of wood samples were carried out at 80, 120, 160 and 200°C. The study revealed significant variation between physico-chemical and mechanical properties of thermally modified wood of Pinus roxburghii. The highest value of specific gravity 0.492 (at 80°C), moisture content (29.14%) and maximum moisture content (190.88%) were recorded in control, whereas the lowest value of specific gravity 0.418 (160°C), moisture content (1.20%) and maximum moisture content (126.77%) were recorded at 200°C. There was no effect of thermal treatment on tracheid length and diameter and medium texture was observed for all temperature treatments. The colour of wood became darker with increase in temperature treatments, seven different colour were observed. The maximum value of shrinkage in longitudinal plane (0.42%), radial plane (4.63%), volumetric shrinkage (9.28%) were recorded at control, and maximum value tangential plane (3.67%), were recorded at 120°C. While the minimum value of shrinkage in longitudinal plane (0.04%), radial plane (2.22%), tangential plane (1.55%), volumetric shrinkage (4.88%) were recorded at 200°C. Among temperature the maximum value of swelling in longitudinal (0.41%), radial (5.22%) and tangential plane (3.15%) were recorded at control, and maximum volumetric swelling (7.71%) was recorded at 120°C, while minimum value of swelling in longitudinal plane (0.08%), radial plane (2.26%) and tangential plane (1.29%) and minimum volumetric swelling (3.15%) were recorded at 200°C. The maximum value of cold water (8.20%), hot water soluble extractives (12.67%), holocellulose content (71.78%) and ash content (1.46%) were recorded at 120°C, whereas the maximum value of alcohol benzene soluble extractives (13.87%), lignin content (33.74%), were observed at 200°C. The minimum value of cold water soluble extractives (5.82%), hot water soluble extractives (9.27%), holocellulose content (65.82%) and ash content (1.03%) were found to be at 200°C, while the lowest value of alcohol benzene soluble extractives 12.17per cent (control) and lignin content (28.03%), were found to be at 80°C. The highest value of tensile strength (0.057 kN/mm2) and compression parallel to the grain (0.050 kN/mm2) were recorded at 120°C, the maximum value of bending strength (0.084 kN/mm2) and compression strength perpendicular to grain (0.027 kN/mm2) were recorded in control, whereas the lowest value of tensile strength 0.043 kN/mm2 (80°C), bending strength 0.007 kN/mm2 (120°C), compression parallel to the grain 0.018 kN/mm2 (80°C) and compression strength perpendicular to the grain 0.012 kN/mm2 (160°C).en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810136030
dc.keywordsPhysico-chemical,mechanical properties ,Sargent,wooden_US
dc.language.isoenen_US
dc.pages74+ven_US
dc.publisherUHF,NAUNIen_US
dc.subForest Productsen_US
dc.subjectnullen_US
dc.themePhysico-chemical,mechanical properties ,Sargent,wooden_US
dc.these.typeM.Scen_US
dc.titlePHYSICO-CHEMICAL AND MECHANICAL PROPERTIES OF THERMALLY MODIFIED WOOD OF Pinus roxburghii SARGENTen_US
dc.typeThesisen_US
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