X-ray powder diffraction and other analyses of cellulose nanocrystals obtained from corn straw by chemical treatments

Carbohydrate Polymers
C C HernandezD S Rosa

Abstract

The extraction of nanocellulose from agro-industrial wastes is feasible due to a significant amount of cellulose contained in these natural fibers. The analysis of chemical treatments effects on the fibers to obtain the nanocellulose must be taken into consideration for the definition of an adequate and efficient methodology. In this study, two alkaline treatments were used (cleaning and bleaching), as well as an acid treatment for the extraction of nanocellulose from corn straw residues. The samples were characterized using Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRPD), scanning electron microscopy (SEM), dynamic light scattering (DLS) and atomic force microscopy (AFM) to verify the action and modifications caused in their chemical and physical structures. It was possible to verify the extraction of hemicellulose and lignin, the reduction of fiber sizes to the nanoscale, and the final sample presenting superior crystallinity for the bleached fiber.

Citations

Apr 3, 2020·International Journal of Biological Macromolecules·Sagnite Ventura-CruzAlberto Tecante
Jun 15, 2019·Carbohydrate Polymers·Sagnite Ventura-Cruz, Alberto Tecante
Jun 22, 2019·Carbohydrate Polymers·Marcos Aurélio DahlemAndré Luís Catto
Jun 9, 2021·Journal of Controlled Release : Official Journal of the Controlled Release Society·Ishaq LugoloobiYili Zhao

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