查詢結果分析
來源資料
頁籤選單縮合
題名 | 酚/雙酚A混合液液化柳杉材之性質=Properties of Cryptomeria Japonica Wood Liquefied with Phenol/Bisphenol A Co-solvent |
---|---|
作者 | 吳秋昌; 李文昭; Wu, Chiou-chang; Lee, Wen-jau; |
期刊 | 林產工業 |
出版日期 | 20090600 |
卷期 | 28:2 2009.06[民98.06] |
頁次 | 頁85-97 |
分類號 | 474.1 |
語文 | chi |
關鍵詞 | 雙酚A; 柳杉; 酚; 木材液化; Bisphenol A; Cryptomeria japonica; Phenol; Wood liquefaction; |
中文摘要 | 本研究將柳杉(Cryptomeria japonica Don.; Japanese cedar)木材以酚與雙酚A混合液為液化溶劑,H2SO4為催化劑,於130℃加熱60min進行液化處理,探討酚與雙酚A重量比對柳杉木材液化效果及其液化產物性質之影響。由試驗結果顯示,酚/雙酚A對柳杉木材之液化效果良好,其液化產物中殘渣率僅約2.1%;FT-IR分析顯示木材之化學組成分在液化過程中發生降解,並與酚/雙酚A結合形成苯酚衍生物,其與酚之反應主要為酚對位(para-)及鄰位(ortho-position)上C-H之取代反應,與雙酚A之反應則為苯酚上C_2-H之取代反應。GPC分析顯示液化產物之分子量分布於兩個區域,隨液化時間延長,屬於液化溶劑之低分子量區之波峰強度明顯降低;隨液化溶劑中雙酚A比例增加,其液化產物具有較高之分子量。TGA分析結果顯示酚液化木材具有兩個熱裂解階段,而酚/雙酚A液化柳杉者為三階段之熱裂解,其中雙酚A結構中烷鏈之耐熱性較低,其第二階段之熱裂解速率隨雙酚A比例增加而加速。 |
英文摘要 | "Cryptomeria japonica" Don. (Japanese cedar) was liquefied with the mixture of phenol and bisphenol A as a solvent, the H_2SO_4 as a catalyst, and heated at 130℃ for 60 min. The influence of the weight ratio of phenol to bisphenol A on the liquefying efficiency and the properties of liquefied products were investigated. The results showed that the mixture of phenol and bisphenol A had good efficiency for the Cryptomeria japonica wood liquefaction. The residue content in the liquefied product was only 2.1%. The FT-IR analysis indicated that wood components were degraded during the process of liquefaction, and reacted with both of phenol and bisphenol A to form phenolic derivatives. As reacted with phenol, the derivatives were formed by the para- and ortho-substitution of the C-H in the phenol. While reacted with bisphenol A, it was the C_2-H substitution at the benzene structure of bisphenol A. The GPC analysis showed that the molecular weight distribution of liquefied products could be distinguished into two regions. Prolonging the liquefaction time, the intensity of the peak of low molecular weight materials which attributed to liquefaction solvent became weakened. However, increasing the rate of bisphenol A in the liquefaction solvent, they had liquefied products with higher molecular weight. The TGA analysis illustrated that the phenol-liquefied wood had the thermal decomposition with a two-stage process, but it was a three-stage process for the phenol/bisphenol A-liquefied wood. In addition, the secondary thermal decomposition stage would accelerate with increasing the amount of bisphenol A due to the lower heat resistance of the alkyl chain in bisphenol A. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。