Dissolution and delignification of bamboo biomass using amino acid-based ionic liquid

Appl Biochem Biotechnol. 2011 Oct;165(3-4):998-1009. doi: 10.1007/s12010-011-9315-y. Epub 2011 Jul 1.

Abstract

In the present work, the dissolution of bamboo biomass was tested using a number of ionic liquids synthesized in laboratory. It was observed that one of the synthesized amino acid-based ionic liquids, namely 1-ethyl-3-methylimidazolium glycinate, was capable of dissolving the biomass completely. The dissolved biomass was then regenerated using a reconstitute solvent (acetone/water) and was characterized using Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy. The results were compared to preconditioned bamboo biomass. The regenerated biomass was found to have a more homogenous macrostructure, which indicates that the crystalline form and structure of its cellulose has changed from type Ι to type ΙΙ during the dissolution and regeneration process.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acids / chemistry
  • Amino Acids / metabolism*
  • Bambusa / metabolism*
  • Biomass
  • Biotechnology / methods*
  • Crystallization
  • Imidazoles / chemistry*
  • Ionic Liquids / chemistry*
  • Lignin / chemistry
  • Lignin / metabolism*
  • Microscopy, Electron, Scanning
  • Solubility
  • Spectroscopy, Fourier Transform Infrared
  • Water
  • X-Ray Diffraction

Substances

  • Amino Acids
  • Imidazoles
  • Ionic Liquids
  • Water
  • Lignin
  • 1-ethyl-3-methylimidazolium