Structural Characterization and Antioxidant Activity of Lignin Extracted from Ficus Carica L.

• 作者: Ali Moussa Gérard Mortha Ibtissem Moussa Mohamed Farouk Mhenni Ramzi Khiari
• 来源期刊: 可再生材料杂志(英文)
• 学科: 化学
• 关键词: FICUS CARICA L. LIGNIN ORGANOSOLV molecular weight NMR spectroscopy antioxidant activity
• 年，卷（期）: 2019,（4）
• 页码范围: 345-354
• 页数: 10页
• 分类号: O62

摘要

The most abundant phenolic biopolymer in the biosphere is the lignin.This phenolic biopolymer commonly exists in combination with polysaccharides and other cell wall components.In this study,the solvent system dioxane-water is used to extract lignin,which is considered as unaltered native lignin.The dioxane lignin extracted from fig stems was characterized regarding to its structural feature,quantification of its functional groups,molecular weight,and evaluation of its thermal properties.Purity and molecular weight distribution of the studied lignin indicated that isolated lignin contained a low amount of sugar(c.a.19%)and had a high weight-average molecular weight(10068 g.mol-1).Lignin sample had approximately the same amounts of guaiacyl(G)and p-hydroxyphenyl(H)units with relatively fewer syringyl(S)units.The isolated lignin revealed good antioxidant properties.Therefore,it proved to have a high potential of application in new antioxidants formulations.