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題 名 | 多元醇液化柳杉及麻竹之特性=Characteristics of Polyhydric Alcohol Liquefied Japanese Cedar and Ma Bamboo |
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作 者 | 吳秋昌; 李文昭; | 書刊名 | 林產工業 |
卷 期 | 26:2 2007.06[民96.06] |
頁 次 | 頁95-106 |
分類號 | 474.1 |
關鍵詞 | 液化木質材料; 柳杉; 麻竹; 多元醇; Liquefied woody materials; Japanese cedar; Ma bamboo; Polyhydric alcohol; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究以柳杉(Cryptomeria japonica; Japanese cedar)及麻竹(Dendrocalamus latiflorus Munro; ma bamboo)為試驗材料,聚乙二醇(Polyethylene glycol; PEG)與丙三醇(Glycerol)之混合液為溶劑,H_2SO_4為催化劑,並在150℃加熱75min進行木質材料之液化處理,並以液化產物之殘渣率、黏度、不揮發分、酸價、羥價做為液化效果之評估指標,以FT-IR光譜分析其組成物結構變化,以GPC膠體滲透層析儀檢測其分子量變化。由試驗結果得知,經150℃加熱反應45min後可完成木質材料之液化反應,其中以分子量400之聚乙二醇為液化藥劑者,其液化效果優於分子量600者;兩種木質材料比較,柳杉之液化效果優於麻竹。由FTIR分析顯示木質材料在液化過程中產生降解,並與多元醇液化藥劑產生醚鍵結合而形成衍生物,各液化木質材料則有相似之組成物分子結構。液化木質材料之分子量分布可區分為低分子量區及高分子量區兩部分,其中高分子量區域之平均分子量約16000,低分子量區域之平均分子量則約在2500~3000之間。 |
英文摘要 | In this study, Japanese cedar (Cryptomeria japonica) and Ma bamboo (Dendrocalamus latiflorus Munro) were liquefied in polyethylene glycol (PEG)-glycerol co-solvent with H_2SO_4 as a catalyst at 150℃ for 75min. The residue content, viscosity, non-volatile content, acid value and hydroxyl value of the liquefied woody materials were used as the assessment index of the effect of liquefaction. The FT-IR was used to analyze the changing of wood component structure. The GPC was used to examine the molecular weights of liquefied woody materials. The results showed that woody materials could be liquefied completely by heating at 150℃ for 45min. Using PEG-400 as the liquefaction reagent had better effect than that of PEG-600. Comparison between Japanese cedar and Ma Bamboo, the efficiency of liquefaction for the former was better than that of the latter. The FT-IR analysis indicated that the woody materials would be degraded during the period of liquefaction, and reacted with the liquefaction reagent to form derivatives by the etherification. All of these liquefied woody materials had the same composition structure. The molecular weight distribution of the liquefied woody materials could be distinguished into high and low molecular weight region. The average molecular weight of the high molecular weight region was about 16000, and those between 2500 and 3000 were for the low molecular weight region. |
本系統中英文摘要資訊取自各篇刊載內容。