133250 20260217205458.0 doi 10.3390/polym16050637 sideral 138018 ART-2024-138018 eng Pina-Vidal, Cristina Universidad de Zaragoza Mechanochemical encapsulation of caffeine in UiO-66 and UiO-66-NH2 to obtain polymeric composites by extrusion with recycled polyamide 6 or polylactic acid biopolymer 2024 Access copy available to the general public Unrestricted The development of capsules with additives that can be added to polymers during extrusion processing can lead to advances in the manufacturing of textile fabrics with improved and durable properties. In this work, caffeine (CAF), which has anti-cellulite properties, has been encapsulated by liquid-assisted milling in zirconium-based metal–organic frameworks (MOFs) with different textural properties and chemical functionalization: commercial UiO-66, UiO-66 synthesized without solvents, and UiO-66-NH2 synthesized in ethanol. The CAF@MOF capsules obtained through the grinding procedure have been added during the extrusion process to recycled polyamide 6 (PA6) and to a biopolymer based on polylactic acid (PLA) to obtain a load of approximately 2.5 wt% of caffeine. The materials have been characterized by various techniques (XRD, NMR, TGA, FTIR, nitrogen sorption, UV–vis, SEM, and TEM) that confirm the caffeine encapsulation, the preservation of caffeine during the extrusion process, and the good contact between the polymer and the MOF. Studies of the capsules and PA6 polymer+capsules composites have shown that release is slower when caffeine is encapsulated than when it is free, and the textural properties of UiO-66 influence the release more prominently than the NH2 group. However, an interaction is established between the biopolymer PLA and caffeine that delays the release of the additive. info:eu-repo/grantAgreement/ES/DGA/LMP53-21 info:eu-repo/grantAgreement/ES/DGA/T68-23R info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es 4.9 2024 POLYMER SCIENCE 19 / 94 = 0.202 2024 Q1 T1 0.918 2024 Polymers and Plastics 2024 Q1 Chemistry (miscellaneous) 2024 Q1 9.7 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Berned-Samatán, Víctor Piera, Elena Caballero, Miguel Ángel Téllez, Carlos Universidad de Zaragoza (orcid)0000-0002-4954-1188 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 16, 5 (2024), 637 [29 pp.] Polymers (Basel) Polymers 2073-4360 2177054 http://zaguan.unizar.es/record/133250/files/texto_completo.pdf Versión publicada 2763127 http://zaguan.unizar.es/record/133250/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:133250 articulos driver 2026-02-17-20:20:58 ARTICLE