To main content

Structural and thermal characterization of novel organosolv lignins from wood and herbaceous sources

Abstract

This study demonstrates the effects of structural variations of lignins isolated via an organosolv process from different woody and herbaceous feedstocks on their thermal stability profiles. The organosolv lignins were first analysed for impurities, and structural features were determined using the default set of gel permeation chromatography, FT-IR spectroscopy, quantitative 31 P NMR spectroscopy and semi-quantitative 1 H- 13 C HSQC analysis. Pyrolysis-, O 2 - and CO 2 -reactivity of the organosolv lignins were investigated by thermogravimetric analysis (TGA), and volatile formation in various heating cycles was mapped by head-space GC-MS analysis. Revealed reactivities were correlated to the presence of identified impurities and structural features typical for the organosolv lignins. Data suggest that thermogravimetric analysis can eventually be used to delineate a lignin character when basic information regarding its isolation method is available.

Category

Academic article

Language

English

Author(s)

Affiliation

  • University of Limerick
  • University of Naples 'Federico II'
  • SINTEF Industry / Metal Production and Processing
  • SINTEF Industry / Biotechnology and Nanomedicine
  • University of Venice Ca' Foscari
  • Luleå University of Technology

Date

17.07.2020

Year

2020

Published in

Processes

ISSN

2227-9717

Publisher

MDPI

Volume

8

Issue

7

Page(s)

1 - 21

View this publication at Cristin