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Influence of wood extratives from different extraction solvents on the colour changes and mechanical properties of Acacia Hybrid particleboard

Effect of wood extractives towards particleboard production was less emphasized by other researchers. The aim of this study was to determine wood extractives of Acacia hybrid, and evaluate colour changes and mechanical properties of particleboard made from Acacia hybrid. Acacia hybrid was divided in...

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Main Author: Lo, Ket Soon
Format: Thesis
Language:English
English
Published: 2012
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SD391-410.9 Sylviculture
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spelling my.ums.eprints.428372025-02-24T02:56:41Z https://eprints.ums.edu.my/id/eprint/42837/ Influence of wood extratives from different extraction solvents on the colour changes and mechanical properties of Acacia Hybrid particleboard Lo, Ket Soon SD391-410.9 Sylviculture Effect of wood extractives towards particleboard production was less emphasized by other researchers. The aim of this study was to determine wood extractives of Acacia hybrid, and evaluate colour changes and mechanical properties of particleboard made from Acacia hybrid. Acacia hybrid was divided into bark, sapwood and heartwood. Each portion had undergoing soxhlet extraction according to American Society for Testing and Materials Standard (ASTM) D1108-96, D1107-96 and D1110-84 using different polarity solvents; hexane, methanol and hot water. The crude extract of each portion was analyzed to determine the chemical components of wood extractives from the extraction solvents. Wood extractives covered in this study were low molecular weight compounds; fatty acids, sterols, glycerides and steryl ester. Gas chromatography analysis was carried out for crude extract of hexane and methanol due to these volatile solvents. Crude extract of hot water was analyzed by High Performance Liquid Chromatography due to its non-volatility. Results shown that total extractives analyzed by Gas chromatography for methanol extract in heartwood was highest, 1.45 mg/g, followed by bark and sapwood of 1.39 mg/g and 0.89 mg/g respectively. For hot water extract, heartwood was found to have the most in total extractives, 1.83 mg/g, followed by bark 1.26 mg/g and sapwood, 0.82 mg/g. In term of physical property of colour changes, results shown that colour changes of lightness (L*) for wood powder was lightest by using methanol to extract bark, sapwood and heartwood that were, 50.25 for bark, 50.31 for sapwood and 41.57 for heartwood. In producing particleboard, larger amount of wood particles were extracted using the ratio of extraction on wood particle to solvent extraction; 1 g of wood particle to 10 ml of solvent for 6 hours of extraction period. Wood particles were glued using urea formaldehyde and the targeted density was 500 kg/m3. Particleboards produced were tested on static bending and internal bonding according to ASTM Standard D1037-06a. Results shown that particleboard made from methanol extracted wood particle for sapwood and heartwood had a significant difference at p≤0.05 for static bending and internal bonding. Sapwood extracted by methanol was 0.5 times higher for both Modulus of Rupture (MOR) and Modulus of Elasicity (MOE) and 0.3 times higher for internal bonding as compared to control sapwood particleboard. Heartwood extracted by methanol was 2.0 times higher for MOR and MOE and 0.6 times higher for internal bonding compared to control heartwood particleboard. However, bark extracted by hexane was 0.4 times higher for MOR, 2.0 times for MOE and 0.3 times higher for internal bonding as compare to control bark. 2012 Thesis NonPeerReviewed text en https://eprints.ums.edu.my/id/eprint/42837/1/24%20PAGES.pdf text en https://eprints.ums.edu.my/id/eprint/42837/2/FULLTEXT.pdf Lo, Ket Soon (2012) Influence of wood extratives from different extraction solvents on the colour changes and mechanical properties of Acacia Hybrid particleboard. Masters thesis, Universiti Malaysia Sabah.
institution Universiti Malaysia Sabah
building UMS Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sabah
content_source UMS Institutional Repository
url_provider http://eprints.ums.edu.my/
language English
English
topic SD391-410.9 Sylviculture
spellingShingle SD391-410.9 Sylviculture
Lo, Ket Soon
Influence of wood extratives from different extraction solvents on the colour changes and mechanical properties of Acacia Hybrid particleboard
description Effect of wood extractives towards particleboard production was less emphasized by other researchers. The aim of this study was to determine wood extractives of Acacia hybrid, and evaluate colour changes and mechanical properties of particleboard made from Acacia hybrid. Acacia hybrid was divided into bark, sapwood and heartwood. Each portion had undergoing soxhlet extraction according to American Society for Testing and Materials Standard (ASTM) D1108-96, D1107-96 and D1110-84 using different polarity solvents; hexane, methanol and hot water. The crude extract of each portion was analyzed to determine the chemical components of wood extractives from the extraction solvents. Wood extractives covered in this study were low molecular weight compounds; fatty acids, sterols, glycerides and steryl ester. Gas chromatography analysis was carried out for crude extract of hexane and methanol due to these volatile solvents. Crude extract of hot water was analyzed by High Performance Liquid Chromatography due to its non-volatility. Results shown that total extractives analyzed by Gas chromatography for methanol extract in heartwood was highest, 1.45 mg/g, followed by bark and sapwood of 1.39 mg/g and 0.89 mg/g respectively. For hot water extract, heartwood was found to have the most in total extractives, 1.83 mg/g, followed by bark 1.26 mg/g and sapwood, 0.82 mg/g. In term of physical property of colour changes, results shown that colour changes of lightness (L*) for wood powder was lightest by using methanol to extract bark, sapwood and heartwood that were, 50.25 for bark, 50.31 for sapwood and 41.57 for heartwood. In producing particleboard, larger amount of wood particles were extracted using the ratio of extraction on wood particle to solvent extraction; 1 g of wood particle to 10 ml of solvent for 6 hours of extraction period. Wood particles were glued using urea formaldehyde and the targeted density was 500 kg/m3. Particleboards produced were tested on static bending and internal bonding according to ASTM Standard D1037-06a. Results shown that particleboard made from methanol extracted wood particle for sapwood and heartwood had a significant difference at p≤0.05 for static bending and internal bonding. Sapwood extracted by methanol was 0.5 times higher for both Modulus of Rupture (MOR) and Modulus of Elasicity (MOE) and 0.3 times higher for internal bonding as compared to control sapwood particleboard. Heartwood extracted by methanol was 2.0 times higher for MOR and MOE and 0.6 times higher for internal bonding compared to control heartwood particleboard. However, bark extracted by hexane was 0.4 times higher for MOR, 2.0 times for MOE and 0.3 times higher for internal bonding as compare to control bark.
format Thesis
author Lo, Ket Soon
author_facet Lo, Ket Soon
author_sort Lo, Ket Soon
title Influence of wood extratives from different extraction solvents on the colour changes and mechanical properties of Acacia Hybrid particleboard
title_short Influence of wood extratives from different extraction solvents on the colour changes and mechanical properties of Acacia Hybrid particleboard
title_full Influence of wood extratives from different extraction solvents on the colour changes and mechanical properties of Acacia Hybrid particleboard
title_fullStr Influence of wood extratives from different extraction solvents on the colour changes and mechanical properties of Acacia Hybrid particleboard
title_full_unstemmed Influence of wood extratives from different extraction solvents on the colour changes and mechanical properties of Acacia Hybrid particleboard
title_sort influence of wood extratives from different extraction solvents on the colour changes and mechanical properties of acacia hybrid particleboard
publishDate 2012
url https://eprints.ums.edu.my/id/eprint/42837/1/24%20PAGES.pdf
https://eprints.ums.edu.my/id/eprint/42837/2/FULLTEXT.pdf
https://eprints.ums.edu.my/id/eprint/42837/
_version_ 1825161827168813056
score 13.244413

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