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Improved Chemical Reactivity of Lignocellulose from High Solids Content Micro-fibrillation by Twin-screw Extrusion

  • Jinlei Li
  • Michael ThompsonEmail author
  • David J. W. Lawton
Original Paper
  • 15 Downloads

Abstract

The low reactivity of lignocellulose limits the effective chemical conversion of lignocellulose biomass into functional bioproducts. Mechanical micro-fibrillation treatment can improve the chemical accessibility of lignocellulose but usually has limited productivity by the low processing solids content. The presented work demonstrates effective micro-fibrillation of lignocellulose at high solids content up to 60 wt% can be achieved by twin-screw extrusion. Morphological characterizations of the extruded wood pulp lignocellulose show the degree of micro-fibrillation is enhanced by operating at higher solids content. The lignocellulose treated at 60 wt% solids content presents 2.1 and 4.8 times higher water retention capacity and specific surface area, respectively, than the original material. Acetylation results show the twin-screw extrusion pre-treatment can significantly accelerate the chemical modification of lignocellulose by 50%. This high productivity method for micro-fibrillating lignocellulose should be of great interest to the bioplastics industry.

Keywords

Lignocellulose Twin-screw extrusion Micro-fibrillation Chemical reactivity 

Notes

Acknowledgements

This study was supported by Clean Manufacturing and Nano-engineering of Sustainable Materials, Ontario Research Fund (ORF) led by Dr. Sain at the University of Toronto.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Jinlei Li
    • 1
  • Michael Thompson
    • 1
    Email author
  • David J. W. Lawton
    • 2
  1. 1.Department of Chemical EngineeringMcMaster UniversityHamiltonCanada
  2. 2.Xerox Research Centre of CanadaMississaugaCanada

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