Fractionation and physicochemical characterization of lignin from waste jute bags: Effect of process parameters on yield and thermal degradation

被引：29
作者：
Ahuja, Dheeraj [1 ]
Kaushik, Anupama [1 ]
Chauhan, Ghanshyam S. [2 ]
机构：
[1] Panjab Univ, Dr SS Bhatnagar Univ Inst Chem Engn, Chandigarh 160014, India
[2] Himachal Pradesh Univ, Dept Chem, Shimla 171005, Himachal Prades, India
来源：
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2017年 / 97卷
关键词：
Soda lignin; Jute fibers; Yield; TGA; FTIR; UV; NMR; PRODUCTION RESIDUE; WHEAT-STRAW; HEMICELLULOSE; CELLULOSE; ALCOHOL;
D O I：
10.1016/j.ijbiomac.2017.01.057
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
In this work lignin was extracted from waste jute bags using soda cooking method and effect of varying alkali concentration and pH on yield, purity, structure and thermal degradation of lignin were studied. The Lignin yield, chemical composition and purity were assessed using TAPPI method and UV-vis spectroscopy. Yield and purity of lignin ranged from 27 to 58% and 50-94%, respectively for all the samples and was maximum for 8% alkali concentration and at pH 2 giving higher thermal stability. Chemical structure, thermal stability and elementary analysis of lignin were studied using FTIR, (NMR)-N-H, thermo gravimetric analysis (TGA) and Elemental analyzer. FTIR and (NMR)-N-H results showed that core structure of lignin starts breaking beyond 10% alkali concentration. S/G ratio shows the dominance of Syringyl unit over guaiacyl unit. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：403 / 410
页数：8
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