Effects of the thickness of the heat-treated wood specimen on water-soluble extractives and mechanical properties of merbau heartwood
Merbau wood has a disadvantage in outdoor applications because its water-soluble extractives readily leach out and stain adjacent materials. This study examined the thickness of the heat-treated wood specimen on water-soluble extractives and some mechanical properties. The results show that heat tre...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
North Carolina State University
2013-02-01
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| Series: | BioResources |
| Subjects: | |
| Online Access: | http://www.ncsu.edu/bioresources/BioRes_08/BioRes_08_1_0603_b_Hu_JZXY_Size_Heat_Treat_Extraction_Property_Heartwood_3395.pdf |
| Summary: | Merbau wood has a disadvantage in outdoor applications because its water-soluble extractives readily leach out and stain adjacent materials. This study examined the thickness of the heat-treated wood specimen on water-soluble extractives and some mechanical properties. The results show that heat treatment is efficient at removing the water-soluble extractives of merbau heartwood and overcoming the leaching problem. The absorbance of UV light decreased in intensity when the duration of heating was increased from 1 hour to 5 hours. The dominant absorbance peak increased from the surface layer to the core layer. The modulus of elasticity (MOE) and modulus of rupture (MOR) of heat-treated samples showed significant reductions when the heating duration exceeded a certain point. The total loss of mass during heat treatment and water extraction verified that heat treatment removes the water-soluble extractives efficiently. |
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| ISSN: | 1930-2126 |