125316 20241125101153.0 doi 10.3390/gels9010032 sideral 132925 ART-2023-132925 eng Carvajal-Barriga, Enrique Javier Opportunities for ivory nut residue valorization as a source of nanocellulose colloidal suspensions 2023 Access copy available to the general public Unrestricted Ivory nut seeds have been traditionally exploited in Central and South America for obtaining vegetable ivory. The residues from this industry are susceptible to valorization as a source of fatty acids (by organic extraction) and mannans (by alkaline dissolution and regeneration). Nonetheless, cellulose may also be recovered at the end of this fractionation process by acid hydrolysis and functionalization, with associated advantages over other lignocellulosic sources due to the absence of lignin in the endospermic tissue. In this work, various experimental parameters (sulfuric acid concentration, temperature, and hydrolysis time) were investigated to optimize the processing conditions for preparing stable nanocellulose suspensions after ultrasonication. The most stable nanocellulose gel (1 wt% solid content) was obtained after 4-h hydrolysis at 60 °C with 8 M H2SO4 and was characterized by using complementary tech-niques, including dynamic light scattering (DLS), transmission electron microscopy (TEM), X-ray powder diffraction (XRD), nano-fibril sulfation measurements, vibrational and solid-state nuclear magnetic resonance (CP/MAS 13C-NMR) spectroscopies, and thermal analysis. This nanocellulose hydrogel is susceptible to further utilization in various applications and fields, e.g., in agricul-ture for controlling the release of agrochemicals, in pharmaceutics for developing new dosage forms, and in the treatment of wastewater from the textile and paper industries. info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 5.0 2023 POLYMER SCIENCE 14 / 95 = 0.147 2023 Q1 T1 0.674 2023 Polymers and Plastics 2023 Q1 Organic Chemistry 2023 Q2 Bioengineering 2023 Q2 Biomaterials 2023 Q2 4.7 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Putaux, Jean-Luc Martín Ramos, Pablo (orcid)0000-0003-2713-2786 Simbaña, Jennifer Portero-Barahona, Patricia Martín-Gil, Jesús 9, 1 (2023), 32 [15] Gels Gels 2310-2861 3107263 http://zaguan.unizar.es/record/125316/files/texto_completo.pdf Versión publicada 2712260 http://zaguan.unizar.es/record/125316/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:125316 articulos driver 2024-11-22-12:07:58 ARTICLE