2026-04-28T19:36:20Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/695772025-02-06T11:02:12Zcom_10324_1166com_10324_931com_10324_894col_10324_1338

Carvajal Barriga, Enrique Javier Putaux, Jean-Luc Martín Ramos, Pablo Simbaña, Jennifer Portero Barahona, Patricia Martín Gil, Jesús 2024-09-02T12:04:24Z 2024-09-02T12:04:24Z 2022 Gels, 2023, Vol. 9, Nº. 1, 32 2310-2861 https://uvadoc.uva.es/handle/10324/69577 10.3390/gels9010032 32 1 Gels 9 2310-2861 Producción Científica 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. El proyecto fue financiado por la Pontificia Universidad Católica del Ecuador. application/pdf eng MDPI info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ © 2022 The authors Atribución 4.0 Internacional Polymers Biomaterials Nanocellulose Agricultural engineering Agricultural residues Residuos agrícolas Sustainable development Desarrollo sostenible Palm trees Palmeras Agriculture - Latin America Agricultura - América Latina Forests and forestry Bosques y silvicultura Plant science Chemistry, Organic Ivory nut Nuez de marfil 2206.10 Polímeros 2304.02 Celulosa 3102 Ingeniería Agrícola 3106 Ciencia Forestal 3106.08 Silvicultura 2306 Química Orgánica Opportunities for ivory nut residue valorization as a source of nanocellulose colloidal suspensions info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://www.mdpi.com/2310-2861/9/1/32 SI