INVESTIGADORES
ALVAREZ Vera Alejandra
artículos
Título:
Extraction of cellulose nanowhiskers from natural fibers and agricultural byproducts
Autor/es:
LEANDRO LUDUEÑA; ANTONELLA VECCHIO; PABLO STEFANI; VERA ALVAREZ
Revista:
FIBERS AND POLYMERS
Editorial:
KOREAN FIBER SOC
Referencias:
Año: 2013 vol. 14 p. 1118 - 1127
ISSN:
1229-9197
Resumen:
In this work the feasibility of extracting cellulose from cotton, sisal and flax fibers, corn stover and rice husk by means of usual chemical procedures such as acid hydrolysis, chlorination, alkaline extraction, and bleaching was analyzed. Cellulose nanowhiskers from these sources, and from commercial cellulose, were produced by the acid hydrolysis of the obtained celluloses. The final products were characterized by means of Thermogravimetric Analysis (TGA), Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), Scanning Electronic Microscopy (SEM) and Atomic Force Microscopy (AFM). The chemical procedure used to obtain cellulose nanowhiskers was effective in all cases but differences on the thermal stability, chemical composition, crystallinity and morphology were found due to the dissimilar nature of the different sources. Thus, this work demonstrates that the morphology and physical properties of cellulose nanowhiskers synthesized by the same conditions are strongly dependent on their source.