| 刺槐Brauns木素热诱导变色研究 |
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| 引用本文： | 高建民,樊永明,李明飞.刺槐Brauns木素热诱导变色研究[J].北京林业大学学报,2008,30(6):128-131. |
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| 作者姓名： | 高建民 樊永明 李明飞 |
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| 作者单位： | 木材科学与工程教育部重点实验室，北京林业大学材料科学与技术学院 |
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| 摘 要： | 为研究木素在热诱导条件下的颜色变化，对模拟干燥处理前后刺槐Brauns木素（BNL）的UVVis、FTIR和13C NMR等光谱进行了比较分析。结果表明:①木素受热后颜色变深是导致刺槐木材颜色变深的重要原因。刺槐木素紫外光谱具有K带、B带和R带吸收，受热后曲线总体上移，吸光系数增加；木素受热后R带吸收峰加宽，并延伸至可见光区域；②在模拟干燥条件下，木素C5位有缩合反应发生而使木素共轭体系延长，木素受热后α O 4结构发生断裂使酚羟基增加，共轭芳酮结构（α 羰基）信号仍然很强。这些均为木素受热后吸收光谱发生深色位移导致颜色变深的重要原因。
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| 关 键 词： | Brauns木素 热诱导变色 刺槐 |
| 收稿时间： | 1900-01-01 |
Thermal-induced discoloration of Brauns lignin from xylem of Robinia pseudocacia |
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| GAO Jian-min,FAN Yong-ming,LI Ming-fei.Key Laboratory of Wood Science , Engineering of Ministry of Education,College of Materials Science , Technology,Beijing Forestry University,P.R.China..Thermal-induced discoloration of Brauns lignin from xylem of Robinia pseudocacia[J].Journal of Beijing Forestry University,2008,30(6):128-131. |
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| Authors: | GAO Jian-min FAN Yong-ming LI Ming-feiKey Laboratory of Wood Science Engineering of Ministry of Education College of Materials Science Technology Beijing Forestry University PRChina |
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| Institution: | Key Laboratory of Wood Science and Engineering of Ministry of Education， College of Materials Science and Technology, Beijing Forestry University，100083，P.R.China. |
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| Abstract: | The structure alteration of Brauns lignin(BNL) from the xylem of Robinia pseudocacia before and after thermal treatment was analyzed by UV-Vis,FTIR and()~(13)C-NMR techniques.The results showed that the darkening of BNL after thermal treatment played an important role in the darken wood of R.pseudocacia.The UV-Vis spectra of BNL absorbed R,B and K bands.The thermal treatment led to the upward displacement of spectra curve,the increase of extinguishing coefficient in UV-Vis spectra and the broadening of the ... |
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| Keywords: | Brauns lignin thermal-induced discoloration Robinia pseudocacia |
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