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題 名 | 造林木邊材乙醯化後之耐腐性及抗白蟻性=Decay and Termite Resistance of Planted Tree Sapwood Modified by Acetylation |
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作 者 | 王振瀾; 林天書; 李銘華; | 書刊名 | 臺灣林業科學 |
卷 期 | 17:4 2002.12[民91.12] |
頁 次 | 頁483-490 |
分類號 | 436.187 |
關鍵詞 | 造林木; 乙醯化木材; 重量增加率; 耐腐性; 抗白蟻性; Planted trees; Acetylated sapwood; Weight percent gain; Decay resistance; Termite resistance; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究應用醋酸酐(acetic anhydride)處理柳杉(Japanese cedar; Cryptomeria jaaonica)和二葉松(Taiwanred pine; Pinus taiwanensis)之邊材,將木材 結構轉化為乙醯化衍生物。測定不同加熱(llO°C)反應時間之重量增加率(WG,%),以瞭解乙 醯化之程度。加熱1h後,柳杉和二葉松之WG值分別為18.51%及19.70%。加熱2h後,2種試材 之WG值均達到20%以上。隨著加熱時間之增長,兩種邊材之WG值也逐漸增大。唯加熱5h之 後,WG值增加速度明顯降低。參照標準步驟(CNS-6717)觀測乙醯化木材之耐腐性,試驗用 菌種為褐腐菌Oligoporus subcaesius D.(TFRI 198)。再依照ASTM-D3345之標準方法,探 討乙醯化木材之抗白蟻性,使用之白蟻為家白蟻(Coptotermes formsanus)。與對照材之 腐朽率及白蟻侵蝕狀況相比較,乙醯化木材之耐腐及抗白蟻性質均獲得有效改善。唯處理 時間超過5h以後,耐腐及抗白蟻效應之增進速率均減緩。 |
英文摘要 | Sapwoods from planted Japanese cedar (Cryptomeria japonica) and Taiwan red pine (Pinus taiwanensis) were treated with acetic anhydride to obtain acetylated derivatives. The weight percent gain (WG, %) of acetylated wood was measured after different periods of heating (at 110℃). After being heated for 1 h, the WG values of wood samples were observed in length, the WG values grew accordingly. However, the rate of increase obviously dropped after 5 h of reaction. The decay resistance of acetylated sapwood was determined according to standard procedures (CNS-6717). The brown-rot fungus, Oligoporus subcaesius D. (TFRI 198), was used for this test. Termite resistance of acetylated sapwood was examined according to standard methods (ASTMD3345). The experimental termite was Coptopermes formosanus. Compared to the control wood samples, both the decay and termite resistances were found to be improved by acetylation. These improved effects were also shown to increase more slowly after 5 h of reaction. |
本系統中英文摘要資訊取自各篇刊載內容。