Cellulose microfibrils from banana rachis: Effect of alkaline treatments on structural and morphological features

Robin Zuluaga, Jean Luc Putaux, Javier Cruz, Juan Vélez, Iñaki Mondragon, Piedad Gañán

Research output: Contribution to journalArticlepeer-review

336 Scopus citations

Abstract

Four different alkaline treatments for isolation of cellulose microfibrils from vascular bundles of banana rachis were comparatively studied. Isolated cellulose microfibrils were characterized using high performance anion exchange chromatography for neutral sugar composition, as well as attenuated total reflection Fourier transform infrared spectroscopy, transmission electron microscopy, X-ray and electron diffraction and solid-state 13C NMR. The cellulose microfibrils treated with peroxide alkaline, peroxide alkaline-hydrochloric acid or 5 wt% potassium hydroxide had average diameters of 3-5 nm, estimated lengths of several micrometers. Although the interpretation of their structure is difficult because of the low cristallinity, X-ray diffraction, 13C NMR and ATR-FTIR results suggested that cellulose microfibrils from banana rachis could be either interpreted as cellulose IV1 or cellulose Iβ. The specimens treated with a more concentrated KOH solution (18 wt%) were still microfibrillated but their structure was converted to cellulose II. Crown

Original languageEnglish
Pages (from-to)51-59
Number of pages9
JournalCarbohydrate Polymers
Volume76
Issue number1
DOIs
StatePublished - 2 Mar 2009
Externally publishedYes

Bibliographical note

Funding Information:
The authors would like to thank Colciencias for the financial support that has made this research work possible, as well as Y. Nishiyama and H. Chanzy (CERMAV) for helpful suggestions. We also thank Dr. S. Curling (Napier University) by the analyzing of monosaccharides using high performance anion exchange chromatography.

Keywords

  • Agro-industrial residues
  • Banana rachis
  • Cellulose microfibrils
  • Chemical treatments
  • Crystalline structure

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