Comparative study of lignins isolated from Alfa grass (Stipa tenacissima L.)
Comparative study of lignins isolated from Alfa grass (Stipa tenacissima L.)
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DOI：
10.1016/j.biortech.2009.01.074
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发表时间：
2009-07-01
影响因子：
11.4
通讯作者：
Stevanovic, T.
中科院分区：
文献类型：
--
作者：
Nadji, H.;Diouf, P. N.;Stevanovic, T.
从细针茅（Stipa tenacissima L.）进行了三种不同木质素的物理化学表征：一种是从苏打废液中沉淀的工业木质素，两种是在实验室条件下从阿尔法草（Alfa grass）（也称为Esparta grass）中分离的木质素制剂。采用三种非破坏性方法（FT-IR、固态C-13 NMR和UV/可见光谱）和两种破坏性方法（硝基苯氧化和热重分析）研究了木质素的结构。进行元素分析和甲氧基含量测定，以确定所研究的木质素的C-9式。已测定所研究的木质素的总抗氧化能力，并与热塑性塑料工业中常用的商业抗氧化剂进行比较。(C)2009爱思唯尔有限公司保留所有权利。
Soda lignin, dioxane lignin and milled lignin were isolated from Alfa grass (Stipa tenacissima L.). The physico-chemical characterization of three different lignins: one industrial lignin precipitated from soda spent liquor and two lignin preparations isolated under laboratory conditions from Alfa grass (also know as Esparta grass) was performed. The structures of lignins were studied by three non-destructive (FT-IR, solid state C-13 NMR and UV/visible spectroscopy) and two destructive (nitrobenzene oxidation and thermogravimetric analysis) methods. Elemental analysis and the methoxyl content determination were performed in order to determine the C-9 formulae for the studied lignins. The total antioxidant capacity of the studied lignins has been determined and compared to commercial antioxidants commonly used in thermoplastic industry. (C) 2009 Elsevier Ltd. All rights reserved.