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为表征巨龙竹木质素化学结构,在温和条件下连续采用二氧六环和二甲基亚砜抽提竹材原料,得到竹材木质素组分。红外光谱、凝胶色谱和核磁共振分析结果表明,巨龙竹木质素属于典型的禾草类木质素,其大分子由对羟基苯丙烷(H)、愈创木基丙烷(G)和紫丁香基丙烷(S)三种基本结构单元组成;巨龙竹木质素大分子的主要联接键为β-O-4’醚键、β-β’和β-5’碳-碳键;在巨龙竹木质素大分子中,苯丙烷结构单元侧链γ位碳与对香豆酸存在化学键联接,形成对香豆酸酯。
In order to characterize the chemical structure of Dracaena catenella, bamboo material was extracted by dioxane and dimethyl sulfoxide continuously under mild conditions to obtain bamboo lignin components. Infrared spectrum, gel chromatography and nuclear magnetic resonance analysis showed that the dragon bamboo lignin belongs to a typical grass-like lignin, the macromolecules from the hydroxy-phenylpropane (H), guaiacylpropyl (G) and lilac (S). The main linkers of the giant bamboo lignin macromolecules are β-O-4 ’ether bond, β-β’ and β-5 ’carbon-carbon bond. Bamboo lignin macromolecules, phenylpropane structural unit side chain γ carbon and p-coumaric acid chemical bond exists to form p-coumarate.