Sandwich compression of wood: effects of preheating time and moisture distribution on the formation of compressed layer(s)
Abstract Wood sandwich compression technology can on the one hand effectively improve the physical and mechanical properties of low-density fast-growing wood, on the other hand it saves at least 25 vol% of raw materials (compared to the traditional wood compression technology) by controlling the pos...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Gao, Zhiqiang [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2018 |
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| Anmerkung: |
© Springer-Verlag GmbH Germany, part of Springer Nature 2018 |
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| Übergeordnetes Werk: |
Enthalten in: European journal of wood and wood products - Berlin : Springer, 2009, 77(2018), 2 vom: 11. Dez., Seite 219-227 |
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| Übergeordnetes Werk: |
volume:77 ; year:2018 ; number:2 ; day:11 ; month:12 ; pages:219-227 |
| Links: |
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| DOI / URN: |
10.1007/s00107-018-1377-x |
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SPR000703710 |
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| 100 | 1 | |a Gao, Zhiqiang |e verfasserin |4 aut | |
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| 520 | |a Abstract Wood sandwich compression technology can on the one hand effectively improve the physical and mechanical properties of low-density fast-growing wood, on the other hand it saves at least 25 vol% of raw materials (compared to the traditional wood compression technology) by controlling the position of compressed layer(s). In this study, white poplar (Populus tomentosa) lumbers were firstly soaked in water for 2 h, then preheated at 180 °C for 0–600 s. After the preheating process, radial compression was applied to obtain sandwich-compressed wood, and the compression was fixed by superheated steam treatment. Moisture distribution along the wood thickness and density distribution in the compressed wood were characterized. Furthermore, effects of preheating time on moisture distribution, position and thickness of the compressed layer(s) were investigated. Results indicated that the position of the compressed layer(s) moved from the wood surface to the center as a result of preheating time extension. The initial moving speed of the compressed layer(s) was 0.040 mm/s, which was sharply reduced to 0.014 mm/s with the extension of preheating time to 120 s. Further extension of preheating time above 120 s did not extensively reduce the compressed layer(s) moving speed. When the preheating time was 480 s, two compressed layers in the compressed wood converged to one at the center along the thickness in the compressed wood. More importantly, it was found that the positions of the compressed layer(s) highly matched up with high moisture content (MC) regions in the preheating process. A significant linear correlation between positions of the MC peak in high MC region of the preheated lumbers and density peak in the compressed layer(s) was built. In addition, moisture distribution along the thickness of wood can be controlled by adjusting the preheating time to eventually control the position and thickness of the compressed layer(s) in the sandwich-compressed wood. Superheated steam treatment after wood sandwich compression contributed to the reduced set recovery percentage of 1.58% after conditioning at 40 °C and relative humidity of 90%. | ||
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| 700 | 1 | |a Chang, Jianmin |4 aut | |
| 700 | 1 | |a Li, Ren |4 aut | |
| 700 | 1 | |a Wu, Yanmei |4 aut | |
| 700 | 1 | |a Wang, Yanwei |4 aut | |
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10.1007/s00107-018-1377-x doi (DE-627)SPR000703710 (SPR)s00107-018-1377-x-e DE-627 ger DE-627 rakwb eng Gao, Zhiqiang verfasserin aut Sandwich compression of wood: effects of preheating time and moisture distribution on the formation of compressed layer(s) 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract Wood sandwich compression technology can on the one hand effectively improve the physical and mechanical properties of low-density fast-growing wood, on the other hand it saves at least 25 vol% of raw materials (compared to the traditional wood compression technology) by controlling the position of compressed layer(s). In this study, white poplar (Populus tomentosa) lumbers were firstly soaked in water for 2 h, then preheated at 180 °C for 0–600 s. After the preheating process, radial compression was applied to obtain sandwich-compressed wood, and the compression was fixed by superheated steam treatment. Moisture distribution along the wood thickness and density distribution in the compressed wood were characterized. Furthermore, effects of preheating time on moisture distribution, position and thickness of the compressed layer(s) were investigated. Results indicated that the position of the compressed layer(s) moved from the wood surface to the center as a result of preheating time extension. The initial moving speed of the compressed layer(s) was 0.040 mm/s, which was sharply reduced to 0.014 mm/s with the extension of preheating time to 120 s. Further extension of preheating time above 120 s did not extensively reduce the compressed layer(s) moving speed. When the preheating time was 480 s, two compressed layers in the compressed wood converged to one at the center along the thickness in the compressed wood. More importantly, it was found that the positions of the compressed layer(s) highly matched up with high moisture content (MC) regions in the preheating process. A significant linear correlation between positions of the MC peak in high MC region of the preheated lumbers and density peak in the compressed layer(s) was built. In addition, moisture distribution along the thickness of wood can be controlled by adjusting the preheating time to eventually control the position and thickness of the compressed layer(s) in the sandwich-compressed wood. Superheated steam treatment after wood sandwich compression contributed to the reduced set recovery percentage of 1.58% after conditioning at 40 °C and relative humidity of 90%. Huang, Rongfeng (orcid)0000-0002-0190-5712 aut Chang, Jianmin aut Li, Ren aut Wu, Yanmei aut Wang, Yanwei aut Enthalten in European journal of wood and wood products Berlin : Springer, 2009 77(2018), 2 vom: 11. Dez., Seite 219-227 (DE-627)594429870 (DE-600)2485250-8 1436-736X nnns volume:77 year:2018 number:2 day:11 month:12 pages:219-227 https://dx.doi.org/10.1007/s00107-018-1377-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2542 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 77 2018 2 11 12 219-227 |
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10.1007/s00107-018-1377-x doi (DE-627)SPR000703710 (SPR)s00107-018-1377-x-e DE-627 ger DE-627 rakwb eng Gao, Zhiqiang verfasserin aut Sandwich compression of wood: effects of preheating time and moisture distribution on the formation of compressed layer(s) 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract Wood sandwich compression technology can on the one hand effectively improve the physical and mechanical properties of low-density fast-growing wood, on the other hand it saves at least 25 vol% of raw materials (compared to the traditional wood compression technology) by controlling the position of compressed layer(s). In this study, white poplar (Populus tomentosa) lumbers were firstly soaked in water for 2 h, then preheated at 180 °C for 0–600 s. After the preheating process, radial compression was applied to obtain sandwich-compressed wood, and the compression was fixed by superheated steam treatment. Moisture distribution along the wood thickness and density distribution in the compressed wood were characterized. Furthermore, effects of preheating time on moisture distribution, position and thickness of the compressed layer(s) were investigated. Results indicated that the position of the compressed layer(s) moved from the wood surface to the center as a result of preheating time extension. The initial moving speed of the compressed layer(s) was 0.040 mm/s, which was sharply reduced to 0.014 mm/s with the extension of preheating time to 120 s. Further extension of preheating time above 120 s did not extensively reduce the compressed layer(s) moving speed. When the preheating time was 480 s, two compressed layers in the compressed wood converged to one at the center along the thickness in the compressed wood. More importantly, it was found that the positions of the compressed layer(s) highly matched up with high moisture content (MC) regions in the preheating process. A significant linear correlation between positions of the MC peak in high MC region of the preheated lumbers and density peak in the compressed layer(s) was built. In addition, moisture distribution along the thickness of wood can be controlled by adjusting the preheating time to eventually control the position and thickness of the compressed layer(s) in the sandwich-compressed wood. Superheated steam treatment after wood sandwich compression contributed to the reduced set recovery percentage of 1.58% after conditioning at 40 °C and relative humidity of 90%. Huang, Rongfeng (orcid)0000-0002-0190-5712 aut Chang, Jianmin aut Li, Ren aut Wu, Yanmei aut Wang, Yanwei aut Enthalten in European journal of wood and wood products Berlin : Springer, 2009 77(2018), 2 vom: 11. Dez., Seite 219-227 (DE-627)594429870 (DE-600)2485250-8 1436-736X nnns volume:77 year:2018 number:2 day:11 month:12 pages:219-227 https://dx.doi.org/10.1007/s00107-018-1377-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2542 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 77 2018 2 11 12 219-227 |
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10.1007/s00107-018-1377-x doi (DE-627)SPR000703710 (SPR)s00107-018-1377-x-e DE-627 ger DE-627 rakwb eng Gao, Zhiqiang verfasserin aut Sandwich compression of wood: effects of preheating time and moisture distribution on the formation of compressed layer(s) 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract Wood sandwich compression technology can on the one hand effectively improve the physical and mechanical properties of low-density fast-growing wood, on the other hand it saves at least 25 vol% of raw materials (compared to the traditional wood compression technology) by controlling the position of compressed layer(s). In this study, white poplar (Populus tomentosa) lumbers were firstly soaked in water for 2 h, then preheated at 180 °C for 0–600 s. After the preheating process, radial compression was applied to obtain sandwich-compressed wood, and the compression was fixed by superheated steam treatment. Moisture distribution along the wood thickness and density distribution in the compressed wood were characterized. Furthermore, effects of preheating time on moisture distribution, position and thickness of the compressed layer(s) were investigated. Results indicated that the position of the compressed layer(s) moved from the wood surface to the center as a result of preheating time extension. The initial moving speed of the compressed layer(s) was 0.040 mm/s, which was sharply reduced to 0.014 mm/s with the extension of preheating time to 120 s. Further extension of preheating time above 120 s did not extensively reduce the compressed layer(s) moving speed. When the preheating time was 480 s, two compressed layers in the compressed wood converged to one at the center along the thickness in the compressed wood. More importantly, it was found that the positions of the compressed layer(s) highly matched up with high moisture content (MC) regions in the preheating process. A significant linear correlation between positions of the MC peak in high MC region of the preheated lumbers and density peak in the compressed layer(s) was built. In addition, moisture distribution along the thickness of wood can be controlled by adjusting the preheating time to eventually control the position and thickness of the compressed layer(s) in the sandwich-compressed wood. Superheated steam treatment after wood sandwich compression contributed to the reduced set recovery percentage of 1.58% after conditioning at 40 °C and relative humidity of 90%. Huang, Rongfeng (orcid)0000-0002-0190-5712 aut Chang, Jianmin aut Li, Ren aut Wu, Yanmei aut Wang, Yanwei aut Enthalten in European journal of wood and wood products Berlin : Springer, 2009 77(2018), 2 vom: 11. Dez., Seite 219-227 (DE-627)594429870 (DE-600)2485250-8 1436-736X nnns volume:77 year:2018 number:2 day:11 month:12 pages:219-227 https://dx.doi.org/10.1007/s00107-018-1377-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2542 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 77 2018 2 11 12 219-227 |
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10.1007/s00107-018-1377-x doi (DE-627)SPR000703710 (SPR)s00107-018-1377-x-e DE-627 ger DE-627 rakwb eng Gao, Zhiqiang verfasserin aut Sandwich compression of wood: effects of preheating time and moisture distribution on the formation of compressed layer(s) 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract Wood sandwich compression technology can on the one hand effectively improve the physical and mechanical properties of low-density fast-growing wood, on the other hand it saves at least 25 vol% of raw materials (compared to the traditional wood compression technology) by controlling the position of compressed layer(s). In this study, white poplar (Populus tomentosa) lumbers were firstly soaked in water for 2 h, then preheated at 180 °C for 0–600 s. After the preheating process, radial compression was applied to obtain sandwich-compressed wood, and the compression was fixed by superheated steam treatment. Moisture distribution along the wood thickness and density distribution in the compressed wood were characterized. Furthermore, effects of preheating time on moisture distribution, position and thickness of the compressed layer(s) were investigated. Results indicated that the position of the compressed layer(s) moved from the wood surface to the center as a result of preheating time extension. The initial moving speed of the compressed layer(s) was 0.040 mm/s, which was sharply reduced to 0.014 mm/s with the extension of preheating time to 120 s. Further extension of preheating time above 120 s did not extensively reduce the compressed layer(s) moving speed. When the preheating time was 480 s, two compressed layers in the compressed wood converged to one at the center along the thickness in the compressed wood. More importantly, it was found that the positions of the compressed layer(s) highly matched up with high moisture content (MC) regions in the preheating process. A significant linear correlation between positions of the MC peak in high MC region of the preheated lumbers and density peak in the compressed layer(s) was built. In addition, moisture distribution along the thickness of wood can be controlled by adjusting the preheating time to eventually control the position and thickness of the compressed layer(s) in the sandwich-compressed wood. Superheated steam treatment after wood sandwich compression contributed to the reduced set recovery percentage of 1.58% after conditioning at 40 °C and relative humidity of 90%. Huang, Rongfeng (orcid)0000-0002-0190-5712 aut Chang, Jianmin aut Li, Ren aut Wu, Yanmei aut Wang, Yanwei aut Enthalten in European journal of wood and wood products Berlin : Springer, 2009 77(2018), 2 vom: 11. Dez., Seite 219-227 (DE-627)594429870 (DE-600)2485250-8 1436-736X nnns volume:77 year:2018 number:2 day:11 month:12 pages:219-227 https://dx.doi.org/10.1007/s00107-018-1377-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2542 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 77 2018 2 11 12 219-227 |
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10.1007/s00107-018-1377-x doi (DE-627)SPR000703710 (SPR)s00107-018-1377-x-e DE-627 ger DE-627 rakwb eng Gao, Zhiqiang verfasserin aut Sandwich compression of wood: effects of preheating time and moisture distribution on the formation of compressed layer(s) 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract Wood sandwich compression technology can on the one hand effectively improve the physical and mechanical properties of low-density fast-growing wood, on the other hand it saves at least 25 vol% of raw materials (compared to the traditional wood compression technology) by controlling the position of compressed layer(s). In this study, white poplar (Populus tomentosa) lumbers were firstly soaked in water for 2 h, then preheated at 180 °C for 0–600 s. After the preheating process, radial compression was applied to obtain sandwich-compressed wood, and the compression was fixed by superheated steam treatment. Moisture distribution along the wood thickness and density distribution in the compressed wood were characterized. Furthermore, effects of preheating time on moisture distribution, position and thickness of the compressed layer(s) were investigated. Results indicated that the position of the compressed layer(s) moved from the wood surface to the center as a result of preheating time extension. The initial moving speed of the compressed layer(s) was 0.040 mm/s, which was sharply reduced to 0.014 mm/s with the extension of preheating time to 120 s. Further extension of preheating time above 120 s did not extensively reduce the compressed layer(s) moving speed. When the preheating time was 480 s, two compressed layers in the compressed wood converged to one at the center along the thickness in the compressed wood. More importantly, it was found that the positions of the compressed layer(s) highly matched up with high moisture content (MC) regions in the preheating process. A significant linear correlation between positions of the MC peak in high MC region of the preheated lumbers and density peak in the compressed layer(s) was built. In addition, moisture distribution along the thickness of wood can be controlled by adjusting the preheating time to eventually control the position and thickness of the compressed layer(s) in the sandwich-compressed wood. Superheated steam treatment after wood sandwich compression contributed to the reduced set recovery percentage of 1.58% after conditioning at 40 °C and relative humidity of 90%. Huang, Rongfeng (orcid)0000-0002-0190-5712 aut Chang, Jianmin aut Li, Ren aut Wu, Yanmei aut Wang, Yanwei aut Enthalten in European journal of wood and wood products Berlin : Springer, 2009 77(2018), 2 vom: 11. Dez., Seite 219-227 (DE-627)594429870 (DE-600)2485250-8 1436-736X nnns volume:77 year:2018 number:2 day:11 month:12 pages:219-227 https://dx.doi.org/10.1007/s00107-018-1377-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2542 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 77 2018 2 11 12 219-227 |
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Gao, Zhiqiang @@aut@@ Huang, Rongfeng @@aut@@ Chang, Jianmin @@aut@@ Li, Ren @@aut@@ Wu, Yanmei @@aut@@ Wang, Yanwei @@aut@@ |
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<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">SPR000703710</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230330080952.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">201001s2018 xx |||||o 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1007/s00107-018-1377-x</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)SPR000703710</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(SPR)s00107-018-1377-x-e</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Gao, Zhiqiang</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Sandwich compression of wood: effects of preheating time and moisture distribution on the formation of compressed layer(s)</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2018</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="500" ind1=" " ind2=" "><subfield code="a">© Springer-Verlag GmbH Germany, part of Springer Nature 2018</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Wood sandwich compression technology can on the one hand effectively improve the physical and mechanical properties of low-density fast-growing wood, on the other hand it saves at least 25 vol% of raw materials (compared to the traditional wood compression technology) by controlling the position of compressed layer(s). In this study, white poplar (Populus tomentosa) lumbers were firstly soaked in water for 2 h, then preheated at 180 °C for 0–600 s. After the preheating process, radial compression was applied to obtain sandwich-compressed wood, and the compression was fixed by superheated steam treatment. Moisture distribution along the wood thickness and density distribution in the compressed wood were characterized. Furthermore, effects of preheating time on moisture distribution, position and thickness of the compressed layer(s) were investigated. Results indicated that the position of the compressed layer(s) moved from the wood surface to the center as a result of preheating time extension. The initial moving speed of the compressed layer(s) was 0.040 mm/s, which was sharply reduced to 0.014 mm/s with the extension of preheating time to 120 s. Further extension of preheating time above 120 s did not extensively reduce the compressed layer(s) moving speed. When the preheating time was 480 s, two compressed layers in the compressed wood converged to one at the center along the thickness in the compressed wood. More importantly, it was found that the positions of the compressed layer(s) highly matched up with high moisture content (MC) regions in the preheating process. A significant linear correlation between positions of the MC peak in high MC region of the preheated lumbers and density peak in the compressed layer(s) was built. In addition, moisture distribution along the thickness of wood can be controlled by adjusting the preheating time to eventually control the position and thickness of the compressed layer(s) in the sandwich-compressed wood. Superheated steam treatment after wood sandwich compression contributed to the reduced set recovery percentage of 1.58% after conditioning at 40 °C and relative humidity of 90%.</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Huang, Rongfeng</subfield><subfield code="0">(orcid)0000-0002-0190-5712</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Chang, Jianmin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Li, Ren</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Wu, Yanmei</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Wang, Yanwei</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">European journal of wood and wood products</subfield><subfield code="d">Berlin : Springer, 2009</subfield><subfield code="g">77(2018), 2 vom: 11. 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Gao, Zhiqiang |
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Gao, Zhiqiang Sandwich compression of wood: effects of preheating time and moisture distribution on the formation of compressed layer(s) |
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Sandwich compression of wood: effects of preheating time and moisture distribution on the formation of compressed layer(s) |
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Sandwich compression of wood: effects of preheating time and moisture distribution on the formation of compressed layer(s) |
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sandwich compression of wood: effects of preheating time and moisture distribution on the formation of compressed layer(s) |
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Sandwich compression of wood: effects of preheating time and moisture distribution on the formation of compressed layer(s) |
| abstract |
Abstract Wood sandwich compression technology can on the one hand effectively improve the physical and mechanical properties of low-density fast-growing wood, on the other hand it saves at least 25 vol% of raw materials (compared to the traditional wood compression technology) by controlling the position of compressed layer(s). In this study, white poplar (Populus tomentosa) lumbers were firstly soaked in water for 2 h, then preheated at 180 °C for 0–600 s. After the preheating process, radial compression was applied to obtain sandwich-compressed wood, and the compression was fixed by superheated steam treatment. Moisture distribution along the wood thickness and density distribution in the compressed wood were characterized. Furthermore, effects of preheating time on moisture distribution, position and thickness of the compressed layer(s) were investigated. Results indicated that the position of the compressed layer(s) moved from the wood surface to the center as a result of preheating time extension. The initial moving speed of the compressed layer(s) was 0.040 mm/s, which was sharply reduced to 0.014 mm/s with the extension of preheating time to 120 s. Further extension of preheating time above 120 s did not extensively reduce the compressed layer(s) moving speed. When the preheating time was 480 s, two compressed layers in the compressed wood converged to one at the center along the thickness in the compressed wood. More importantly, it was found that the positions of the compressed layer(s) highly matched up with high moisture content (MC) regions in the preheating process. A significant linear correlation between positions of the MC peak in high MC region of the preheated lumbers and density peak in the compressed layer(s) was built. In addition, moisture distribution along the thickness of wood can be controlled by adjusting the preheating time to eventually control the position and thickness of the compressed layer(s) in the sandwich-compressed wood. Superheated steam treatment after wood sandwich compression contributed to the reduced set recovery percentage of 1.58% after conditioning at 40 °C and relative humidity of 90%. © Springer-Verlag GmbH Germany, part of Springer Nature 2018 |
| abstractGer |
Abstract Wood sandwich compression technology can on the one hand effectively improve the physical and mechanical properties of low-density fast-growing wood, on the other hand it saves at least 25 vol% of raw materials (compared to the traditional wood compression technology) by controlling the position of compressed layer(s). In this study, white poplar (Populus tomentosa) lumbers were firstly soaked in water for 2 h, then preheated at 180 °C for 0–600 s. After the preheating process, radial compression was applied to obtain sandwich-compressed wood, and the compression was fixed by superheated steam treatment. Moisture distribution along the wood thickness and density distribution in the compressed wood were characterized. Furthermore, effects of preheating time on moisture distribution, position and thickness of the compressed layer(s) were investigated. Results indicated that the position of the compressed layer(s) moved from the wood surface to the center as a result of preheating time extension. The initial moving speed of the compressed layer(s) was 0.040 mm/s, which was sharply reduced to 0.014 mm/s with the extension of preheating time to 120 s. Further extension of preheating time above 120 s did not extensively reduce the compressed layer(s) moving speed. When the preheating time was 480 s, two compressed layers in the compressed wood converged to one at the center along the thickness in the compressed wood. More importantly, it was found that the positions of the compressed layer(s) highly matched up with high moisture content (MC) regions in the preheating process. A significant linear correlation between positions of the MC peak in high MC region of the preheated lumbers and density peak in the compressed layer(s) was built. In addition, moisture distribution along the thickness of wood can be controlled by adjusting the preheating time to eventually control the position and thickness of the compressed layer(s) in the sandwich-compressed wood. Superheated steam treatment after wood sandwich compression contributed to the reduced set recovery percentage of 1.58% after conditioning at 40 °C and relative humidity of 90%. © Springer-Verlag GmbH Germany, part of Springer Nature 2018 |
| abstract_unstemmed |
Abstract Wood sandwich compression technology can on the one hand effectively improve the physical and mechanical properties of low-density fast-growing wood, on the other hand it saves at least 25 vol% of raw materials (compared to the traditional wood compression technology) by controlling the position of compressed layer(s). In this study, white poplar (Populus tomentosa) lumbers were firstly soaked in water for 2 h, then preheated at 180 °C for 0–600 s. After the preheating process, radial compression was applied to obtain sandwich-compressed wood, and the compression was fixed by superheated steam treatment. Moisture distribution along the wood thickness and density distribution in the compressed wood were characterized. Furthermore, effects of preheating time on moisture distribution, position and thickness of the compressed layer(s) were investigated. Results indicated that the position of the compressed layer(s) moved from the wood surface to the center as a result of preheating time extension. The initial moving speed of the compressed layer(s) was 0.040 mm/s, which was sharply reduced to 0.014 mm/s with the extension of preheating time to 120 s. Further extension of preheating time above 120 s did not extensively reduce the compressed layer(s) moving speed. When the preheating time was 480 s, two compressed layers in the compressed wood converged to one at the center along the thickness in the compressed wood. More importantly, it was found that the positions of the compressed layer(s) highly matched up with high moisture content (MC) regions in the preheating process. A significant linear correlation between positions of the MC peak in high MC region of the preheated lumbers and density peak in the compressed layer(s) was built. In addition, moisture distribution along the thickness of wood can be controlled by adjusting the preheating time to eventually control the position and thickness of the compressed layer(s) in the sandwich-compressed wood. Superheated steam treatment after wood sandwich compression contributed to the reduced set recovery percentage of 1.58% after conditioning at 40 °C and relative humidity of 90%. © Springer-Verlag GmbH Germany, part of Springer Nature 2018 |
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Sandwich compression of wood: effects of preheating time and moisture distribution on the formation of compressed layer(s) |
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Huang, Rongfeng Chang, Jianmin Li, Ren Wu, Yanmei Wang, Yanwei |
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| score |
7.401184 |