Micro/nanostructured lignonanocellulose obtained from steam-exploded sugarcane bagasse

This work demonstrates the isolation of lignocellulose micro-nanofibrils, nanocrystals and nanospheres from steam-exploded sugarcane bagasse (SEB). First, steam-explosion was carried out in sugarcane bagasse at 195 °C for 7.5 and 15 min (SEB-7.5 and SEB-15). Untreated sugarcane bagasse was also pret...

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Bibliographic Details
Published in:Cellulose (London) 2021-11, Vol.28 (16), p.10163-10182
Main Authors: Fontes, André M., Pirich, Cleverton L., Tanobe, Gustavo R. O. A., Tarrés, Quim, Delgado-Aguilar, Marc, Ramos, Luiz P.
Format: Article
Language:English
Subjects:
Aspect ratio
Bagasse
Bioorganic Chemistry
Bleaching
Ceramics
Chemical composition
Chemistry
Chemistry and Materials Science
Composites
Crystal structure
Crystallinity
Endoglucanase
Glass
High performance liquid chromatography
Lignin
Lignocellulose
Morphology
Nanocrystals
Nanofibers
Nanomaterials
Nanospheres
Natural Materials
Organic Chemistry
Original Research
Performance indices
Physical Chemistry
Polymer Sciences
Rheological properties
Rheology
Sugarcane
Sustainable Development
X ray powder diffraction
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Summary:This work demonstrates the isolation of lignocellulose micro-nanofibrils, nanocrystals and nanospheres from steam-exploded sugarcane bagasse (SEB). First, steam-explosion was carried out in sugarcane bagasse at 195 °C for 7.5 and 15 min (SEB-7.5 and SEB-15). Untreated sugarcane bagasse was also pretreated by mechanical refining (MRB) in a PFI mill for comparison. Then, SEB and MRB fibers were subjected to alkaline delignification, hypochlorite bleaching for 60 or 180 min (HB60 and HB180), enzymatic hydrolysis (endoglucanase), and high-pressure homogenization. The resulting materials were characterized regarding chemical composition by high-performance liquid chromatography, width and morphology by transmission electron microscopy, crystallinity by X-ray powder diffraction and aspect ratio (length/diameter) by rheology. Levels of glucans (mostly cellulose), hemicelluloses and lignin were: 53.8%, 19.7% and 11.6% in MRB-HB180; 87.8%, 
ISSN:0969-0239
1572-882X
DOI:10.1007/s10570-021-04205-x