Treatment of different parts of corn stover for high yield and lower polydispersity lignin extraction with high-boiling alkaline solvent

Bioresource Technology
Mengyao YangJian Xu

Abstract

The influence of different parts of corn stover on lignin extraction was investigated. Five kinds of lignin were isolated by the high boiling point solvent extraction from the whole corn stover and four different parts including leaf, husk, bark and pith. The optimal condition was obtained: 6.25 g/L NaOH, 140 °C, 1 h and 60% (v/v) 1,4-butanediol. The extracted lignins were then characterized. FT-IR analysis revealed that all of the lignins were typically herbaceous. The lignin extracted from husk contained more S unit. Gel permeation chromatography analysis showed that it was necessary to separate corn stover into different parts to obtain low polydispersity lignin. The SEM and FT-IR analysis proved that the lignin dissolution was related to the tightness structure presenting a positive correlation with hydrogen bond index.

Citations

Feb 28, 2019·Biochemistry Research International·Qian FangYu Liu
Apr 15, 2021·Annual Review of Chemical and Biomolecular Engineering·Boelo SchuurLisette M J Sprakel

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