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

作　　者：Ibtissem Moussa Ramzi Khiari Ali Moussa Gérard Mortha Mohamed Farouk Mhenni 

机构地区：[1]University of Monastir,Faculty of Sciences,UR13 ES 63-Research Unity of Applied Chemistry&Environment,Avenue of the environment,5019 Monastir,Tunisia [2]University of Monastir,National Engineering School of Monastir,Street of Ibn El Jazzar,5000 Monastir,Tunisia [3]Higher Institute of Technological Studies of Ksar-Hellal,Department of Textile-Tunisia,Avenue of Hadj Ali Soua.5070 Ksar-Hellal,Tunisia [4]University of Grenoble Alpes,CNRS,Grenoble INP,LGP2,F-38000 Grenoble,France

出　　处：《Journal of Renewable Materials》2019年第4期345-354,共10页可再生材料杂志（英文）

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.

关 键 词：Ficus Carica L. lignin organosolv molecular weight NMR spectroscopy antioxidant activity 

分 类 号：O62[理学—有机化学]