| Full text | |
| Author(s): |
Cidreira, Anne Carolyne Mendonca
;
Hatami, Tahmasb
;
Linan, Lamia Zuniga
;
Pinheiro, Ivanei Ferreira
;
Gomes, Ryan Cutrim
;
Rocha, Jaciene Jesus Cardoso
;
Mei, Lucia Helena Innocentini
Total Authors: 7
|
| Document type: | Journal article |
| Source: | International Journal of Biological Macromolecules; v. 273, p. 13-pg., 2024-06-12. |
| Abstract | |
Exploring new biomass sources for nanocellulose (NC) extraction is crucial in elevating the economic value of readily available renewable resources. This study compares NC extracted from acai ( Euterpe oleracea ) bagasse using different methods: mixed acid hydrolysis, 2,2,6,6-tetramethylpiperidinyl-1-oxy (TEMPO) mediation, and ammonium persulfate (APS) oxidations. A comprehensive analysis investigates the impact of each treatment on the physical-chemical properties of the nanoparticles, including chemical structure, crystallinity, morphology, and thermal and suspension stability. NCs obtained through mixed acid hydrolysis exhibit the highest crystallinity (62 %) and low sulfate groups on their surfaces. Consequently, they demonstrate excellent thermal stability but poor colloidal stability in water. Oxidized NCs undergo chemical modification, converting alcoholic groups into carboxyl, resulting in NCs with zeta potentials ranging between -25.30 +/- 0.81 and - 27.49 +/- 1.07 mV. APS oxidation produces nanoparticles with superior thermal stability compared to TEMPO oxidation. Atomic Force Microscopy (AFM) images reveal that all nanocelluloses share characteristics of nanofibers (CNFs). This comprehensive characterization highlights the potential of acai bagasse for yielding high-added-value bioproducts suitable for versatile applications. (AU) | |
| FAPESP's process: | 18/18722-6 - Constructing a supercritical deposition-foaming unit for 3D supports (scaffold) fabrication: Experiment, mathematical modeling, and optimization |
| Grantee: | Tahmasb Hatami |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |