RT info:eu-repo/semantics/article
T1 Nanocellulose extracted from Paraguayan residual agro-industrial biomass : extraction process, physicochemical and morphological characterization
A1 Velázquez Figueredo, María Edelira
A1 Ferreiro Balbuena, Omayra Beatriz
A1 Menezes, Diego Batista
A1 Corrales Ureña, Yendry
A1 Vega Baudrit, José Roberto
A1 Rivaldi Chávez, Juan Daniel
A2 Universidad Americana/INCADE S.A.E
AB Residual biomasses from agro-industries in Paraguay, including soybean hulls (SBHs) and sugarcane bagasse (SCB), were studied as a source for nanocellulose extraction for the first time. For that purpose, both biomasses were delignified in a semi-pilot stainless-steel reactor, and the cellulose pulp was subjected to a bleaching process with NaClO (2.5%, w/v). The nanocellulose (CNC) was obtained after two-step acid hydrolysis. Firstly, the bleached cellulose was hydrolyzed with HCl (17%, w/w) for two hours at 60 °C to obtain microcrystals by removing most of the amorphous fraction. The celluloses were then treated with H2SO4 (65%, w/w) at 45 °C for 45 min to obtain nanocellulose. Physicochemical and morphological properties were analyzed using attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), atomic force microscopy (AFM), and X-ray diffraction analysis (XRD). The SBHs nanocellulose had a whisker-like form with a 230 ± 42 nm diameter and a 12 ± 2 nm height, and the SCB nanocellulose had a fibril-like form with a 103 ± 30 nm diameter and a height of 6 ± 3 nm. The nanocellulose from SBHs and SCB had good thermal stability as its degradation temperature started at 250 °C. Furthermore, the nanocellulose obtained was negatively charged and formed stable dispersion in water at 0.1 mg/mL concentration and a pH of around 6.5.
PB Multidisciplinary Digital Publishing Institute
SN 2071-1050
YR 2022
FD 2022-09-10
LK http://hdl.handle.net/20.500.14066/4741
UL http://hdl.handle.net/20.500.14066/4741
LA eng
NO Velázquez, M. E., Ferreiro, O. B., Menezes, D. B., Corrales-Ureña, Y., Vega-Baudrit, J. R., & Rivaldi, J. D. (2022). Nanocellulose Extracted from Paraguayan Residual Agro-Industrial Biomass: Extraction Process, Physicochemical and Morphological Characterization. Sustainability, 14(18), Artículo 11386. https://doi.org/10.3390/su141811386
NO Correspondence: danielrivaldi@gmail.com.
NO This article belongs to the Special Issue Biomass Treatment Techniques and Sustainable Utilization of Residues.
NO Consejo Nacional de Ciencia y Tecnología
DS MINDS@UW
RD 04-sep-2026