TY - JOUR
T1 - New approaches to cellulose microfibril isolation from musaceae agro-industrial residues
AU - Zuluaga, Robin
AU - Mondragon, Iñaki
AU - Gañán, Piedad
N1 - Funding Information:
The authors would like to thank to Colciencias for the financial support that has made this research work possible, Dr. S. Curling for sugar analysis and Dr. A. Jiménez for X-ray fluorescence analysis and Corbanacol Foundation for supply rachis samples.
PY - 2009/2/1
Y1 - 2009/2/1
N2 - In this work, Musaceae isolated vascular bundles from rachis agro-industrial residues were evaluated as a potential source of cellulose microfibrils. For vascular bundle isolation, a biological retting was used. For cellulose microfibril isolation, two different alkaline treatments (sodium hydroxide or potassium hydroxide combined with bleaching and acid steps) were used in conjunction with a mechanical process. Cellulose microfibrils using both alkaline processes were successfully isolated, and the presence of non-cellulosic components, especially lignin and some hemicellulose as arabinose and galactose were reduced. In spite of an important amount of oxides being removed during the biological retting, XRF analysis revealed that calcium minerals were still present in the vascular bundles, and they can affect the cellulose microfibril isolation. AFM micrographs of isolated samples revealed cellulose microfibril bundles, and their presence can be associated with non-cellulosic components still present in the samples. Thermal analysis showed that when potassium hydroxide was used, a higher reduction of lignin was observed. Nevertheless, X-ray diffractions indicated no change in the crystallization pattern of cellulose I had occurred due to the isolation process used.
AB - In this work, Musaceae isolated vascular bundles from rachis agro-industrial residues were evaluated as a potential source of cellulose microfibrils. For vascular bundle isolation, a biological retting was used. For cellulose microfibril isolation, two different alkaline treatments (sodium hydroxide or potassium hydroxide combined with bleaching and acid steps) were used in conjunction with a mechanical process. Cellulose microfibrils using both alkaline processes were successfully isolated, and the presence of non-cellulosic components, especially lignin and some hemicellulose as arabinose and galactose were reduced. In spite of an important amount of oxides being removed during the biological retting, XRF analysis revealed that calcium minerals were still present in the vascular bundles, and they can affect the cellulose microfibril isolation. AFM micrographs of isolated samples revealed cellulose microfibril bundles, and their presence can be associated with non-cellulosic components still present in the samples. Thermal analysis showed that when potassium hydroxide was used, a higher reduction of lignin was observed. Nevertheless, X-ray diffractions indicated no change in the crystallization pattern of cellulose I had occurred due to the isolation process used.
KW - Cellulose icrofibrils
KW - Characterization
KW - Isolation
KW - Musaceae plants
KW - Rachis
KW - Vascular bundles
UR - http://www.scopus.com/inward/record.url?scp=66149126873&partnerID=8YFLogxK
U2 - 10.1163/156855408X379379
DO - 10.1163/156855408X379379
M3 - Artículo en revista científica indexada
AN - SCOPUS:66149126873
SN - 0927-6440
VL - 16
SP - 27
EP - 37
JO - Composite Interfaces
JF - Composite Interfaces
IS - 1
ER -