Thermal behavior of Liquidambar orientalis mill wood before and after extraction processes
Yıl: 2017 Cilt: 67 Sayı: 2 Sayfa Aralığı: 150 - 156 Metin Dili: İngilizce DOI: 10.17099/jffiu.292273 İndeks Tarihi: 30-11-2018
Thermal behavior of Liquidambar orientalis mill wood before and after extraction processes
Öz: The effect of extractives on the thermal behavior of Liquidambar orientalis Mill. (storax) wood is studied using thermogravimetric analysis (TGA). To evaluate the effects of polar and apolar extractives on the thermal behavior of wood, sawdust samples from the heartwood of L. orientalis are extracted with either cold water (48 h), hot water (48 h), or ethanol/toluene (1:2 v/v) (6 h) prior to thermal analysis. Thermogravimetry (TG) curves show that polar and apolar extractives promote char formation, increase the amount of residue, and improve the thermal behavior of L. orientalis wood. In addition, derivative thermogravimetry (DTG) curves demonstrate that thermal degradation of unextracted and cold water-extracted wood samples occurs in a single step, while a two-step degradation pattern is seen for hot water- and ethanol/toluene-extracted wood samples. It is also observed that first degradation reactions in hot water and ethanol/toluene-extracted wood samples occur faster than those in unextracted and cold water-extracted wood samples. Although there are approximately half the number of extracted apolar compounds compared to polar compounds, the removal of both types of compounds affect the thermal properties of L. orientalis wood to the same degree. It is thus deduced that apolar extractives significantly affect the thermal behavior of L. orientalis wood.
Anahtar Kelime: Konular:
Ekstraksiyon işlemleri öncesi ve sonrası Liquidambar orientalis mill. odununun termal davranışı
Öz: Liquidambar orientalis Mill. odununun termal davranışı üzerine ekstraktif maddelerin etkisi termogravimetrik analiz (TGA) yöntemiyle incelenmiştir. L. orientalis öz odunundan elde edilen öğütülmüş odun unu örnekleri termal analizler öncesinde polar ve apolar ekstraktiflerin odunun termal davranışı üzerine etkisinin araştırılması amacıyla soğuk su (48 s), sıcak su (48 s) ve etanol/toluen (1:2 v/v) (6 s) ekstraksiyonlarına tabi tutulmuştur. Termogravimetri (TG) eğrileri polar ve apolar ekstraktiflerin kömürleşmiş tabaka oluşumunu desteklediğini, kalıntı madde miktarını artırdığını ve L. orientalis odunun termal davranışını iyileştirdiğini göstermiştir. Türevsel termogravimetri (DTG) eğrileri ise ekstraksiyon işlemi uygulanmamış ve soğuk su ile ekstraksiyonuna tabi tutulmuş odun unu örneklerinde termal bozulmanın tek aşamada gerçekleşirken sıcak su ve etanol/toluen ekstraksiyonuna tabi tutulmuş örneklerde termal bozulmanın iki aşamada gerçekleştiği tespit edilmiştir. Ayrıca, sıcak su ve etanol/toluen ekstraksiyonuna tabi tutulmuş örneklerde ilk termal bozulma reaksiyonlarının ekstraksiyon işlemi uygulanmamış ve soğuk su ile ekstraksiyonuna tabi tutulmuş odun unu örneklerine göre daha hızlı olduğu tespit edilmiştir. Ekstrakte edilen apolar bileşiklerin miktarı polar bileşiklerin yaklaşık yarısı kadar olmasına rağmen apolar bileşiklerin ekstraksiyonunun L. orientalis odununun termal özellikleri üzerine polar bileşikler ile aynı seviyede etkilediği tespit edilmiştir. Bu durum, L. orientalis odununun apolar ekstraktiflerinin odunun termal davranışını önemli derecede etkileyebildiğini ortaya koymaktadır.
Anahtar Kelime: Konular:
Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık
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| APA | TERZİ E (2017). Thermal behavior of Liquidambar orientalis mill wood before and after extraction processes. , 150 - 156. 10.17099/jffiu.292273 |
| Chicago | TERZİ Evren Thermal behavior of Liquidambar orientalis mill wood before and after extraction processes. (2017): 150 - 156. 10.17099/jffiu.292273 |
| MLA | TERZİ Evren Thermal behavior of Liquidambar orientalis mill wood before and after extraction processes. , 2017, ss.150 - 156. 10.17099/jffiu.292273 |
| AMA | TERZİ E Thermal behavior of Liquidambar orientalis mill wood before and after extraction processes. . 2017; 150 - 156. 10.17099/jffiu.292273 |
| Vancouver | TERZİ E Thermal behavior of Liquidambar orientalis mill wood before and after extraction processes. . 2017; 150 - 156. 10.17099/jffiu.292273 |
| IEEE | TERZİ E "Thermal behavior of Liquidambar orientalis mill wood before and after extraction processes." , ss.150 - 156, 2017. 10.17099/jffiu.292273 |
| ISNAD | TERZİ, Evren. "Thermal behavior of Liquidambar orientalis mill wood before and after extraction processes". (2017), 150-156. https://doi.org/10.17099/jffiu.292273 |
| APA | TERZİ E (2017). Thermal behavior of Liquidambar orientalis mill wood before and after extraction processes. İstanbul Üniversitesi Orman Fakültesi Dergisi, 67(2), 150 - 156. 10.17099/jffiu.292273 |
| Chicago | TERZİ Evren Thermal behavior of Liquidambar orientalis mill wood before and after extraction processes. İstanbul Üniversitesi Orman Fakültesi Dergisi 67, no.2 (2017): 150 - 156. 10.17099/jffiu.292273 |
| MLA | TERZİ Evren Thermal behavior of Liquidambar orientalis mill wood before and after extraction processes. İstanbul Üniversitesi Orman Fakültesi Dergisi, vol.67, no.2, 2017, ss.150 - 156. 10.17099/jffiu.292273 |
| AMA | TERZİ E Thermal behavior of Liquidambar orientalis mill wood before and after extraction processes. İstanbul Üniversitesi Orman Fakültesi Dergisi. 2017; 67(2): 150 - 156. 10.17099/jffiu.292273 |
| Vancouver | TERZİ E Thermal behavior of Liquidambar orientalis mill wood before and after extraction processes. İstanbul Üniversitesi Orman Fakültesi Dergisi. 2017; 67(2): 150 - 156. 10.17099/jffiu.292273 |
| IEEE | TERZİ E "Thermal behavior of Liquidambar orientalis mill wood before and after extraction processes." İstanbul Üniversitesi Orman Fakültesi Dergisi, 67, ss.150 - 156, 2017. 10.17099/jffiu.292273 |
| ISNAD | TERZİ, Evren. "Thermal behavior of Liquidambar orientalis mill wood before and after extraction processes". İstanbul Üniversitesi Orman Fakültesi Dergisi 67/2 (2017), 150-156. https://doi.org/10.17099/jffiu.292273 |
