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題 名 | 臺灣杉與玫瑰桉之醇類製漿(2):掃描電子顯微觀察 |
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作 者 | 王益真; 郭夢麟; 谷雲川; | 書刊名 | 林業試驗所研究報告季刊 |
卷 期 | 8:3 1993.09[民82.09] |
頁 次 | 頁177-185 |
分類號 | 476.21 |
關鍵詞 | 臺灣杉; 玫瑰桉; 有機溶劑製漿; 脫木質素; 掃描電子顯微; 腔壁; S[feaf]層; S[feb5]層; 中膠層; 細胞角落; 打漿性質; Taiwania; Eucalyptus; Organosolv pulpig; Delignification; Scanning electron microscopy; Lumen wall; S[feaf]layer; S[feb5]layer; Middle lamella; Cell corners; Beatabiltiy; |
語 文 | 中文(Chinese) |
中文摘要 | 臺灣杉(Taiwania cryptomerioides)與玫瑰桉(Eucalyptus grandis) 分別以 50%乙醇水溶液及含1.5N氫氧化鈉的50%甲醇水溶液在180℃及150℃ 的最高 溫分段蒸煮。不同蒸煮程度的試材分別以聚乙烯乙二醇(polyethylene glycol) 包埋 法切製,再用溶劑交換乾燥法(solvent exchange drying)製成掃描電子顯微 (SEM) 樣品。SEM觀察結果顯示SEM雖然不能觀察到細胞壁內S2層的變化,但是根 據中層膠(middle lamella)、S1層及細胞角落在製漿過程中產生的結構變化,可以 推斷製漿的效果。乙醇法製漿的脫木質素程序應是由細胞腔表面經由S2層延及 細胞角落。鹼性甲醇法製漿的脫木質素程序應是由細胞表面經由S2層內的變化 而不能確知是否以相同程序進行。乙醇法漿經以回收的 50%乙醇洗漿後,未發 現有木質素縮合物沈積在纖維表面。以清水洗淨的鹼性甲醇法漿之纖維表面亦未 發現有木質素的沈積物。乙醇法漿在打漿時較鹼性甲醇法漿易於被帚化。 |
英文摘要 | Taiwania (Taiwania cryptomerioides) and eucalyptus (Eucalyptus grandis) chips were subjected to different degrees of pulping with 50% aqueous ethanol solution at 180℃ and with 50% aqueous methanol containing 1.5N NaOH at 150℃. SEM specimens of pulped chips were prepared by using a polyethylene glycol embedding method and a solvent exchange drying technique after removing the embedding matrix with water. Observations indicate that although changes in the S2 layer could not be observed, structural changes due to pulping in the middle lamella, S1 layer, and cell corners could be used to estimate the effects of pulping. Results suggest that the delignification process during the ethanol pulping proceeded from the lumen wall towards middle lamella, and finally reached cell corners. There is not enough evidence, however, to suggest that the same delignification process occurred in the alkaline methanol pulping. Lignin precipitate was neither observed on the ethanol pulped fibers washed with the recovered 50% ethanol nor on the alkaline methanol pulped fibers washed with just water. The ethanol pulps responded to beating much quicker than the alkaline methanol pulps. |
本系統中英文摘要資訊取自各篇刊載內容。