Impact of regeneration process on the crystalline structure and enzymatic hydrolysis of cellulose obtained from ionic liquid

Carbohydr Polym. 2014 Oct 13:111:400-3. doi: 10.1016/j.carbpol.2014.05.004. Epub 2014 May 12.

Abstract

The present study investigated the impact of regeneration process on the crystalline structure and enzymatic hydrolysis behaviors of microcrystalline cellulose (MCC) regenerated from ionic liquid 1-butyl-3-methylimidazolium chloride. The crystalline structures of these regenerated samples were analyzed by X-ray diffraction. Results suggested that almost amorphous cellulose was obtained by regenerating MCC in acetone (DRC-a), while partial cellulose II structure could be found in these regenerated samples from water and ethanol. Additionally, the enzymatic hydrolysis behaviors of MCC and its regenerated samples were comparatively studied. Results showed that above 90% of cellulose could be converted into glucose within 4h for DRC-a and regenerated cellulose without drying (WRC-w) as compared to that of MCC (9.7%). Therefore, the regeneration process could significantly influence the crystallinity and digestibility of cellulose.

Keywords: Crystallinity; Enzymatic hydrolysis; Microcrystalline cellulose; Regeneration.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aspergillus niger / enzymology
  • Cellulase / metabolism
  • Cellulose / chemistry*
  • Cellulose / metabolism*
  • Hydrolysis
  • Imidazoles / chemistry*
  • Ionic Liquids / chemistry*
  • Trichoderma / enzymology
  • X-Ray Diffraction
  • beta-Glucosidase / metabolism

Substances

  • Imidazoles
  • Ionic Liquids
  • 1-butyl-3-methylimidazolium chloride
  • Cellulose
  • beta-Glucosidase
  • Cellulase
  • microcrystalline cellulose