Structural Characterization and Antioxidant Activity of Milled Wood Lignin from Xylose Residue and Corncob
Structural Characterization and Antioxidant Activity of Milled Wood Lignin from Xylose Residue and Corncob
复制标题
木糖渣和玉米芯磨碎木质素的结构表征和抗氧化活性
DOI：
10.3390/polym11122092
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发表时间：
2019-12
期刊：
影响因子：
5
通讯作者：
Feng Xu
中科院分区：
文献类型：
--
作者：
Miaomiao Xu;Chao Wang;Gaojin Lyu;Lei Zhong;Liyuan Yang;Zhiwei Wang;Chengrong Qin;Xingxiang Ji;Guihua Yang;Jiachuan Chen;Feng Xu
木糖渣（XR）经玉米芯稀释酸处理后，由纤维素和木质素组成。然而，XR木质素的结构变化尚未得到全面的研究，严重阻碍了木质素的高效利用。本研究采用改性磨木质素（MWL）方法分离玉米芯磨木质素（CC MWL）和木糖渣磨木质素（XR MWL）。利用傅里叶红外光谱（FTIR）、凝胶渗透色谱（GPC）、热重分析（TGA）和二维核磁共振（2D NMR）技术对两种木质素组分的结构特征进行了深入研究。由于β-O-4的部分裂解，高产量和低界碳水化合物含量的XR MWL比CC MWL含有更多的酚OH。此外，XR MWL的分子量增加，可能与木糖生产过程中木质素的缩合有关。抗氧化活性研究表明，XR木质素比2,6-二叔丁基-4-甲基苯酚（BHT）和CC MWL具有更好的自由基清除能力。结果表明，木糖渣中的木质素具有良好的抗氧化性能，在食品添加剂中具有潜在的应用价值。
Xylose residue (XR), after diluted acid treatment of corncob, consists of cellulose and lignin. However, structural changes of XR lignin have not been investigated comprehensively, and this has seriously hindered the efficient utilization of lignin. In this study, corncob milled wood lignin (CC MWL), and xylose residue milled wood lignin (XR MWL) were isolated according to the modified milled wood lignin (MWL) method. The structural features of two lignin fractions were thoroughly investigated via fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), thermogravimetric analysis (TGA) and two dimensional nuclear magnetic resonance (2D NMR) spectroscopy techniques. XR MWL with higher yield and lower bound carbohydrate contents presented more phenolic OH contents than CC MWL due to partial cleavage of β-O-4. Furthermore, the molecular weights of XR MWL were increased, possibly because of condensation of the lignin during the xylose production. A study on antioxidant activity showed that XR lignin had better radical scavenging ability than that of 2,6-Di-tert-butyl-4-methyl-phenol (BHT) and CC MWL. The results suggested that the lignin in xylose residue, showing great antioxidant properties, has potential applications in food additives.
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影响因子：
6.3
作者：
Ji Z;Zhang X;Ling Z;Zhou X;Ramaswamy S;Xu F
通讯作者：
Xu F
糠醛残渣和玉米芯磨碎木质素的比较表征
影响因子：
15.1
作者：
Bu, Lingxi;Tang, Yong;Jiang, Jianxin
通讯作者：
Jiang, Jianxin
DOI：
10.3390/molecules15129308
发表时间：
2010-12-16
期刊：
Molecules (Basel, Switzerland)
影响因子：
--
作者：
Faustino H;Gil N;Baptista C;Duarte AP
通讯作者：
Duarte AP
影响因子：
5.7
作者：
Chao Wang;Guihua Yang;Xueming Zhang;Lupeng Shao;Gaojin Lyu;J. Mao;Shijie Liu;Feng Xu
通讯作者：
Chao Wang;Guihua Yang;Xueming Zhang;Lupeng Shao;Gaojin Lyu;J. Mao;Shijie Liu;Feng Xu
影响因子：
11.4
作者：
Guo, Zongwei;Ling, Zhe;Xu, Feng
通讯作者：
Xu, Feng