核桃壳木质素的1H-NMR分析
NALYSIS OF 1H-NMR SPECTROSCOPY OF WALNUT SHELL LIGNIN
在核桃壳磨木木质素（MWL）提取纯化的基础上，对纯化的核桃壳磨木木质素进行了C、H、O及OCH3含量的测定，并利用1H-NMR对核桃壳木质素基本化学结构进行研究。结果表明：（1）核桃壳木质素的C、H、O含量分别为[C]=67.15%，[H]=5.73%，[O]=27.12%，甲氧基含量为18.19%；（2）核桃壳木质素C9经验式为C9H9.22O1.99(OCH3)1.05，其C9单元结构的相对分子量为181.61；（3）核桃壳木质素属GS型木质素，其中G型木质素占多数，为80.68%；（4）核桃壳木质素中酚羟基(OHph)和脂肪族羟基(OHaliph)分别占总羟基数的32.21%和67.79%；（5）核桃壳木质素中存在较多的β-O-4、β-5和β-β结构。
Based on the purified milled wood lignin (MWL) extracted from walnut shell (Juglans Sigillata Dode), the contents of C、H、O , methoxyl groups of MWL were determined and the basic chemical groups of MWL were characterized by 1H-NMR. The results showed that: (1) The contents of C、H、O and methoxyl groups of MWL were 67.15%，5.73%，27.12% and 18.19% respectively; (2) The average per C9 unit formulae of MWL was C9H9.22O1.99(OCH3)1.05, and the molecular weights of C9 unit formulae was 181.61; (3) MWL of walnut shell belongs to Guaiacyl-Syringyl (GS) lignin, but mainly Guaiacyl lignin with the content of 80.68%; (4) based on the total amounts of hydroxyl groups, the ratios of OHph and OHaliph were 32.21% and 67.79% respectively. (5) there were a lot of bonds of β-O-4, β-5 and β-β in walnut shell lignin.
张宏健、陈浪、郑志锋、凌敏、邹局春
生物化学有机化学工业
核桃壳木质素元素分析甲氧基1H-NMR
Walnut shellLigninElement analysisMethoxyl groups1H-NMR
张宏健,陈浪,郑志锋,凌敏,邹局春.核桃壳木质素的1H-NMR分析[EB/OL].(2006-03-17)[2025-08-19].http://www.paper.edu.cn/releasepaper/content/200603-311.点此复制
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