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題名 | 臺灣相思樹樹皮耐熱成分之分析=Analysis of Thermal-resistant Components from Bark of Acacia Confusa |
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作者 | 林翰謙; 林秀如; 杜明宏; 夏滄琪; | 書刊名 | 林產工業 |
卷期 | 25:3 民95.09 |
頁次 | 頁221-236 |
分類號 | 436.18 |
關鍵詞 | 相思樹樹皮; 化學抽出成分; 主成分; 熱重量損失分析; 傅立葉轉換紅外線光譜儀; 固態核磁共振儀; Acacia confusa bark; Chemical extractives; Main components; Thermogravimetric analysis; TGA; Fourier transform infrared spectroscopy; FTIR; Nuclerar magnetic resonance spectroscopy; NMR; |
語文 | 中文(Chinese) |
中文摘要 | 本研究係針對台灣相思樹(Acacia Confusa Merr.)樹皮之化學抽出成分與主成分等來探討其耐熱成分。TGA分析結果得知,相思樹皮之焦炭含量約為20-30%間,而各種抽出物中以醇苯抽出物最高,且較其他者高約4-5倍,當其熱裂解至溫度750℃時,由FTIR得知,僅剩2361 cm^(-1)(C-H)附近之吸收峰;然木質素經TGA分析後之焦炭殘留量約為40%,當其熱裂解至溫度500℃時,則僅存1615 cm^(-1)(C-C)之吸收峰。以NMR分析木質素之化合物結構得知,其化學位移計有115.954 ppm(C_5)、144.496 ppm(C_4)及70.858 ppm(β-O-4)為癒瘡木基之主要結構;153.724 ppm(C_3/C_5)及33.249 ppm(β-O-4)為紫丁香基之主要結構,至熱裂解溫度500℃時只剩癒瘡木基110-144ppm之化學位移。又從NMR分析醇苯抽出物得知,其熱裂解前之主要化學位移分別為9-42 ppm(C-C)、56.698 ppm(OCH_3)、72.210 ppm(β-O-4)、100-137 ppm為癒瘡木基(C_4/C_5)、153.724 ppm為紫丁香基(C_3/C_5)及170-193 ppm(C=O)等;當熱裂解至溫度750℃時,僅剩107-126ppm癒瘡木基(C_5)。據此推斷,醇苯抽出物所具耐熱成分係來自木質素之癒瘡木基(C_5)。 |
英文摘要 | The study was to evaluate chemical extractives and main components of thermal properties from bark of Acacia confusa. The results of TGA analysis showed that the char of Acacia confusa bark was about 20-30%, and the alcohol-benzene extractives were higher than that of the others about 4-5 times. From the results of FTIR, the absorption wavenumber of C-H was remained at 2361 cm^(-1) only, when the pyrolysis temperature was reached to 750℃. For the lignin, the char was over 40%, and there was only the C-C of function group at 1615 cm^(-1) resting at 500℃ of the pyrolysis temperature. For the results of NMR, the chemical shift ranges of the lignin before the tests of TGA first showed that 115.954 ppm (C_5), 144.496ppm (C_4), and 70.858 ppm (a side of β-O-4 structure) were the main structure of guaiacyl, and secondly obtained that C_3/C_5 at 153.724 ppm, as well as the side of β-O-4 structure at 33.249 ppm were the main structure of syringyl. As the pyrolysis temperature through 500℃ after the TGA tests, the guaiacyl at 110-144 ppm was remained. The results of the NMR analysis from the alcohol-benzene extractives obtained that the distribution of chemical shift ranges was included 9-42 ppm (C-C), 56.698 ppm (OCH_3), 72.210ppm (β-O-4), 100-137 ppm (guaiacyl, C_4/C_5), 152.724 ppm (syringyl, C_3/C_5), and 170-193 ppm (C=O). When the pyrolysis temperature was arrived to 750℃, the chemical shift ranges of the alcohol-benzne extractives at 107-126 ppm (C_5) was remained only. It is, therefore, inferred that the thermal-resistant components from the alcohol-benzene extractives is probably from the guaiacyl subunits (Cs) of the lignin. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。