Deep Eutectic Solvents (DESs) for the Isolation of Willow Lignin (Salix matsudana cv. Zhuliu)
Deep Eutectic Solvents (DESs) for the Isolation of Willow Lignin (Salix matsudana cv. Zhuliu)
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用于分离柳木木质素（Salix matsudana cv. Zhuliu）的低共熔溶剂 (DES)
DOI：
10.3390/ijms18112266
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发表时间：
2017-11-01
影响因子：
5.6
通讯作者：
Saeed, Haroon A. M.
中科院分区：
文献类型：
--
作者：
Li, Tengfei;Lyu, Gaojin;Saeed, Haroon A. M.
低共熔溶剂（DES）是一种潜在的高价值木质素提取方法。以氯化胆碱（ChCl）和三种氢键供体（HBD）乳酸（Lac）、甘油和尿素为原料制备的DES对杨柳（Salix matsudana cv.竹柳）木质素。结果表明，当ChCl与Lac的摩尔比为1：10，萃取温度为120 ℃，萃取时间为12 h时，可获得最佳的DES-木质素产率（以杨柳中初始木质素计为91.8 wt %），纯度为94.5%。傅里叶变换红外光谱（FT-IR）、碳13-NMR和磷31-NMR分析表明，氯仿-Lac法提取的杨柳木质素主要由胡萝卜基和愈创木基结构单元组成。偶然地，杨柳中的大部分葡聚糖在ChCl-Lac处理后被保留。
Deep eutectic solvents (DESs) are a potentially high-value lignin extraction methodology. DESs prepared from choline chloride (ChCl) and three hydrogen-bond donors (HBD)lactic acid (Lac), glycerol, and ureawere evaluated for isolation of willow (Salix matsudana cv. Zhuliu) lignin. DESs types, mole ratio of ChCl to HBD, extraction temperature, and time on the fractionated DES-lignin yield demonstrated that the optimal DES-lignin yield (91.8 wt % based on the initial lignin in willow) with high purity of 94.5% can be reached at a ChCl-to-Lac molar ratio of 1:10, extraction temperature of 120 degrees C, and time of 12 h. Fourier transform infrared spectroscopy (FT-IR) , C-13-NMR, and P-31-NMR showed that willow lignin extracted by ChCl-Lac was mainly composed of syringyl and guaiacyl units. Serendipitously, a majority of the glucan in willow was preserved after ChCl-Lac treatment.