https://hdl.handle.net/10259/6735 2026-07-30T16:13:35Z https://hdl.handle.net/10259/11892 Dataset UBU-Polymers Research Group 05122025 Vallejo García, Jorge Lucas; Trigo López, Miriam; Ibeas Cortes, Saturnino; Torija López, Alba; Busto Núñez, Mª Dolores; Pilar Izquierdo, María Concepción; López, Gloria; Sánchez, Carlos; Vallejos Calzada, Saúl The dataset contains all raw data of the work "Dual-Range Colorimetric Protein Quantification in Whey and WPC Using a Smart Polymeric Film and RGB Imaging" 2026-05-11T00:00:00Z https://hdl.handle.net/10259/11889 Dataset of the work "UBU-Polymers Research Group 27052026" Torija López, Alba; Núñez-Carrero, Karina C.; Sedano Labrador, Carlos; Rodríguez Pérez, Miguel Ángel .; Vallejos Calzada, Saúl; Trigo López, Miriam The transition towards circular food packaging requires not only regulatory compliance but also material and structural harmonization. This study analyzes 163 multilayer films from commercial food packaging available on the European market to quantify structural diversity and assess implications for recyclability. Forty-two distinct multilayer configurations and twenty-seven polymer combinations were identified, with no systematic relationship to food category, film thickness, or functional requirements. Functionally similar packages frequently relied on materially incompatible or over-engineered polymer combinations, revealing a fragmented and non-standardized packaging landscape. Although all analyzed structures comply with current European food-contact regulations (EC 1935/2004 and EU 10/2011), their diversity and incompatibility hinder mechanical and chemical recycling, challenging the objectives of the forthcoming Packaging and Packaging Waste Regulation (PPWR). Overall, the results provide quantitative, market-level evidence of structural redundancy and demonstrate how fragmented design practices undermine design-for-recycling principles and the implementation of circular economy strategies in food packaging. 2026-05-25T00:00:00Z https://hdl.handle.net/10259/11017 UBU-Polymers Research Group 21032024 Vallejo García, Jorge Lucas; Trigo López, Miriam; Ibeas Cortes, Saturnino; García García, Félix Clemente; Busto Núñez, Mª Dolores; Núñez-Carrero, Karina C.; Alonso-Pastor, Luis E.; Vallejos Calzada, Saúl This work presents a new polymeric material in the form of a film (FLAC) containing immobilized laccase enzyme through diazo bonds, designed for the degradation of indigo carmine dye, which is highly toxic and commonly found in wastewater from the textile industry. The immobilization of the enzyme in the film was characterized by SEM, FT-IR, DSC, TGA and EDXS. The degradation of the dye by FLAC initiates in the presence of a mediator due to the high redox potential of the dye. Six natural mediators (ferulic acid, syringaldazine, guaiacol, eugenol, thymol, and p-coumaric acid) were tested, and complete degradation of the dye was achieved in 180 min, with a mediator concentration of 1 ppm (syringaldazine) and a dye concentration of 10 ppm. A novelty in this study is the short exposure time of the dye-mediator solution to FLAC (15 min) which allowed the degradation process to continue autonomously after the film was removed. Additionally, it was observed that the material was more effective in the presence of textile washing products, achieving over 99 % degradation in 40 min, surpassing its efficacy in distilled water. Regarding reusability, the material retained >90 % of its activity after five cycles of use and washing. Life Cycle Assessment (LCA) and Techno-Economic Analysis (TEA) identified key levers for techno-economic and environmental viability: shorten cycle time (surfactant media), maximise re-use and percycle volume/concentration, implement solvent recovery, and energy decarbonization thereby outlining a roadmap to sustainable scale-up. 2025-10-28T00:00:00Z https://hdl.handle.net/10259/10814 Dataset of the work "UBU-Polymers Research Group 28032025"  Gaona Ruiz, María; Torija López, Alba; Trigo López, Miriam; Arnáiz Alonso, Ana; Sedano Labrador, Carlos; Rodríguez Velasco, Ana; Vallejo García, Jorge Lucas; Carrillo Pérez, Celia; Vallejos Calzada, Saúl Antioxidants are used as markers of the functional potential of foods, making their accurate quantification essential for assessing bioactivity and possible health benefits. A smart polymer incorporating 2,2-diphenyl-1-picrylhydrazyl (DPPH) motifs (FDPPH) was synthesized via bulk polymerization of N-vinylpyrrolidone, methyl methacrylate, and a diphenylamine-functionalized monomer, followed by solid-phase reactions to introduce the DPPH functionality. FTIR and thermal analysis confirmed successful synthesis. The FDPPH sensor showed a colorimetric response consistent with DPPH in solution, demonstrating its reliability. Twenty-three beet samples were analyzed using both the conventional DPPH assay and the FDPPH method, where polymer discs were immersed and colour changes recorded via smartphone. The hue (H) parameter in the HSV colour-space showed the highest correlation. Calibration using beet samples was more accurate than with Trolox. The optimal response time was 3 hours, with a LOD and LOQ of 0.063 and 0.191 mmol Trolox/L, respectively. 2025-08-25T00:00:00Z