有机溶剂
去壳
木质素
化学
取代基
碳-13核磁共振
化学结构
产量(工程)
有机化学
核化学
材料科学
植物
复合材料
生物
作者
Sandip K. Singh,Paresh L. Dhepe
标识
DOI:10.1016/j.biortech.2016.09.042
摘要
The aim of this work was to study the difference in properties of lignins, those (organosolv lignins (ORGLs, 12±3% yield and 93±5% mass balance) were isolated from diverse rice husk (RH) substrates using organosolv procedure (water:ethanol, H2SO4) carried out at 180°C for 1h. To identify the possible alterations in lignin structures several bulk and molecular level advanced characterization tools were employed. Even though lignins were extracted using common isolation procedure from three varieties of similar species of RH; from XRD, GPC, and elemental analysis it was found that those have comparable properties on bulk level. But molecular level analysis conducted using UV-vis, ATR, 1D/2D HSQC NMR techniques could help disclose that isolated lignins have varying concentrations of G, H, S and T substructures. Additionally, the double bond equivalence of 4.4-4.7 reveals that few of the aromatic rings are devoid of substituent.
科研通智能强力驱动
Strongly Powered by AbleSci AI