| 核交换法对禾草类木质素结构的研究 |
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| 引用本文： | 薛菁雯,何伟,邰瓞生,李忠正.核交换法对禾草类木质素结构的研究[J].纤维素科学与技术,1997(4). |
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| 作者姓名： | 薛菁雯 何伟 邰瓞生 李忠正 |
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| 作者单位： | 南京林业大学化工学院!南京，210037，南京林业大学化工学院!南京，210037，南京林业大学化工学院!南京，210037，南京林业大学化工学院!南京，210037 |
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| 基金项目： | 中国科学院广州化学所纤维素化学开放实验室基金，国家自然科学基金 |
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| 摘 要： | 本文采用核交换法对麦草粉、Nkny－HCHO－AQ（SFP－AQ）浆、NaOH—Na2SO3一AQ（ASP—AQ）浆和NaOH—AQ（AP—AQ）浆中残余木质素的化学结构特性进行了研究。通过核交换法结合硝基苯氧化反应，测定麦草原本木质素和浆中残余本质素的各类型酚核的数量。结果表明麦草原本木质素主要由25．35mol％非缩聚G单元，17．60mol％非缩聚S单元和57．05mol％缩聚G单元所组成。与AP—AQ浆相比，SFP浆含有较少的DPM结构单元，这可能是SFP浆漂白性能好的原因之一。
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| 关 键 词： | 核交换反应 麦草木质素 化学结构 |
A study on the structure of wheat straw lignin by nuclear exchange method |
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| Xue Jingwen, He Wei, Tai Diesheng, Lee Zhongzheng.A study on the structure of wheat straw lignin by nuclear exchange method[J].Journal of Cellulose Science and Technology,1997(4). |
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| Authors: | Xue Jingwen He Wei Tai Diesheng Lee Zhongzheng |
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| Abstract: | Nuclear exchange reaction was amployed to study the lighn structures in the wheat straw meal, SFP-AQ (Na2SO3-HCHO-AQ) pulp, ASP-AQ (NaOH-Na2SO3-AQ) pulp, and AP-AQ (NaOH-AQ) pulp. The type of phenyl nuclei of G and S units in the original and the residual lignins of wheat straw wtre quantitatively analyzed through nuclear exchange reaction and alkaline nitrobensene oxidation. Results showed that the G and S units of wheat straw lignin were composed of 25 .35 mol% non-condeed G unit, 17.60mol% noncondensed S unit arid 57. 05 mol% condeed G unit. The residtal lighn in SFP pulp was found to have less DPM structural units. which Inay be one of the reasons that SFP pulp has better bleachability. |
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| Keywords: | nuclear exchange reaction wheat straw lignin Chemical structure |
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