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Trabajo presentado a la 20th International Zeolite Conference, celebrada en Valencia (España) del 3 al 8 de julio de 2022., This project has received funding from the European Union Horizon 2020 research and innovation program under grant agreement No 760944 (MEMBER project). Grant PID2019-104009RB-I00 funded by MCIN/AEI/10.13039/501100011033 is gratefully acknowledged.

Trabajo presentado a la 20th International Zeolite Conference, celebrada en Valencia (España) del 3 al 8 de julio de 2022., This project has received funding from the European Union´s Horizon 2020 research and innovation program under grant agreement No 862330 (INNOMEM project). Grant PID2019-104009RB-I00 funded by MCIN/AEI/10.13039/501100011033 is gratefully acknowledged.

Resumen del póster presentado a la Conferencia EuroMembrane, celebrada en Copenhague (Dinamarca) del 28 de noviembre al 2 de diciembre de 2021. Main topic: Gas separation., To achieve the Paris Agreement target of below 1.5 ºC in the global average temperature rising, harmful greenhouse gases emissions must be reduced considerably in the coming decades. To accomplish this target, energy-efficient and low-carbon technologies, and CO2 capture and storage approaches must be developed. Recently, membrane-based processes have emerged as attractive candidates for energy-efficient gas separations. The performance of a membrane can be expressed in terms of (i) permeance, the normalized flux for the pressure gradient (ii) permeability, the permeance multiplied by the membrane thickness, and (iii) selectivity, the ratio of permeances. To achieve an efficient separation, which exceeds the Robeson trade-off relationship between permeability and selectivity, an ideal membrane for gas separation should be as thin as possible, to maximize the flux through it (high CO2 permeance), highly selective and mechanically robust. To accomplish this target, composite membranes must be prepared with a very thin selective layer. Furthermore, the incorporation of porous nanofillers in ultra-thin dense layers has demonstrated superior gas separation performances compared to that of the bare polymer. In this work, thin-film nanocomposite (TFN) membranes, comprising different porous zeolitic imidazolate frameworks (ZIFs) embedded in a dense polyether-block-amide (PEBA) thin layer have been fabricated. Moreover, the influence of particle loading and functionalization have also been studied., Financial support from the Research Project PID2019-104009RB-I00/AEI/10.13039/ 501100011033 is gratefully acknowledged.

Samples 1.1 to 3.2 parameters considering the membrane surfaces area, activation procedure, the use of sweep gas and the average value of the stage-cut;Long term gas separation results for sample 1. The average values are calculated as a standard mean value taking all the measurements into account (except the first one in the sample 1.1 since there would be too big deviation). Errors are calculated as the 95% confidence intervals.;Long term gas separation results for sample 2. The average values are calculated as a standard mean value taking all the measurements into account. Errors are calculated as the 95% confidence intervals.;Long term gas separation results for sample 3. The average values are calculated as a standard mean value taking all the measurements into account. Errors are calculated as the 95% confidence intervals.

Resumen del póster presentado a la 9ª Jornada de Jóvenes Investigadores de Química y Física de Aragón, celebrada en la Universidad de Zaragoza el 16 de diciembre de 2021., Ayuda PID2019‐104009RB−I00 financiada por MCIN/AEI/10.13039/501100011033. Lidia Martínez Izquierdo también agradece la financiación recibida por el Gobierno de Aragón para el desarrollo de su tesis doctoral.

Resumen del trabajo presentado a la Conferencia EuroMembrane, celebrada en Copenhague (Dinamarca) del 28 de noviembre al 2 de diciembre de 2021. Main topic: Nanofiltration/Reverse Osmosis.

Resumen del póster presentado a la Conferencia EuroMembrane, celebrada en Copenhague (Dinamarca) del 28 de noviembre al 2 de diciembre de 2021. Main topic: Gas separation., The majority of the current energy is produced from burning fossil fuels, being it electricity, fuel or gas. Without a doubt these processes result in the emission of carbon dioxide to the atmosphere. CO2 holds a major share in causing dramatic climate changes and its impact can now be seen on the world panorama. Gas streams focused on the separation of CO2 from CH4 is one of the possible remediation technologies, especially important for the gas industry. Membranes can provide an eco-friendly and low energy consumption alternative to traditional separation techniques. Various membranes with different structures have been studied for this purpose and thin film composite (TFC) membranes being especially attractive due to their high performance thanks to their small thicknesses (ca. 50 nm) and possibility of modification with porous nanoparticles (e.g. metal-organic frameworks (MOF)). In general, the structure of these membranes, usually prepared by interfacial polymerization, enables that the chemistry and porosity of both layers are changed separately. In this work, we focused on synthesizing a continues MOF layer on the lumen side of the hollow fibre instead of MOF being dispersed in the polymeric matrix. Gas separation with MOF based thin-film nanocomposite membranes represent a unique opportunity to produce a technology breakthrough able to address the environmental tasks just mentioned. Until now the fabrication of these membranes has been mainly demonstrated with a single hollow fiber (HF) [1,2]. Thus, another goal of this work is the implementation of the microfluidic synthesis methodology at larger scale and to increase the number of HF membranes that can be modified simultaneously of up to 10. Briefly, the synthesis procedure involves using three syringe pumps and pumping of first: metal salt, second: ligand, and third: methanol to the inner side of the polysulfone hollow fiber. The fabricated containing a thin selective MOF layer mini-modules are tested in a gas separation set-up provided of gas chromatograph for the estimation of the membrane performance., This project has received funding from the European Union´s Horizon 2020 research and innovation program under grant agreement No 862330 (INNOMEM project). Also, financial support from the research project PID2019-104009RBI00/AEI/10.13039/501100011033 from the AEI is gratefully acknowledged.

Trabajo presentado al Young Researchers CIS, celebrado online del 6 al 8 de septiembre de 2021.

Trabajo presentado al Young Researchers CIS, celebrado online del 6 al 8 de septiembre de 2021., Financial support from the Research Project PID2019-104009RB-I00/AEI/10.13039/ 501100011033 is gratefully acknowledged.

El objetivo principal de esta tesis es el desarrollo y fabricación de un dispositivo microfluídico basado en membranas integradas y el estudio de diversos “contactores de membrana” para las diversas aplicaciones biomedicas. Los dispositivos microfluídicos se fabricaron y se aplicarón en la oxigenación de la sangre y separación de la mezcla de gas anestésico. Para la oxigenación de la sangre, el modelo matemático de transferencia de oxígeno en las unidades principales de los dispositivos microfluídicos subraya la importancia de la arquitectura de bifurcación y la distribución de los distribuidores del flujo dentro de la cámara de líquido.La aplicación de un microcontactor de membrana líquida gaseosa para la eliminación en línea de CO2 demostró cuán efectivos pueden ser los dispositivos miniaturizados para los estudios fundamentales de recuperación de gas anestésico.

The present work is focused on the study of the effect that the casting solution concentration has on the morphology and gas separation performance of poly(ether-block-amide) copolymer membranes (Pebax® MH 1657). With this aim, three different concentrations of Pebax® MH 1657 in the casting solution (1, 3 and 5 wt%) were used to prepare dense membranes with a thickness of 40 µm. The morphology and thermal stability of all membranes were characterized by scanning electron microscopy, X-ray diffraction, differential scanning calorimetry, rotational viscometry and thermogravimetric analyses. An increase in crystallinity was notable when the amount of solvent in the Pebax® MH 1657 solution was higher, mainly related to the polymer chains arrangement and the solvent evaporation time. Such characteristic seemed to play a key role in the thermal degradation of the membranes, confirming that the most crystalline materials tend to be thermally more stable than those with lower crystallinity. To study the influence of their morphology and operating temperature on the CO2 separation, gas separation tests were conducted with the gas mixture CO2/N2. Results indicated that a compromise must be found between the amount of solvent used to prepare the membranes and the crystallinity, in order to reach the best gas separation performance. In this study, the best performance was achieved with the membrane prepared from a 3 wt% casting solution, reaching at 35°C and under a feed pressure of 3 bar, a CO2 permeability of 110 Barrer and a CO2/N2 selectivity of 36., This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement no. 760944 (MEMBER project). Also, financial support from the Spanish Ministry of Science, Innovation and Universities and FEDER (MAT2016-77290-R), the Aragón Government (T43-17R) and the ESF is gratefully acknowledged.

Theoretical background of crystallinity and apparent activation energy calculations. Additional XRD results of thermal annealing.

Resumen del trabajo presentado a la XXXVII Reunión Bienal de la Real Sociedad Española de Química, celebrada en Donostia-San Sebastián del 26 al 30 de mayo de 2019.

Currently, one of the most serious problems is to maintain the water balance in terms of quality and quantity. In recent times, membrane technology is considered to be essential as it ensures high water quality with low cost and maintenance of sustainable water resources. In this work different membranes were fabricated by electrospinning technique. PMMA (polymethyl methacrylate) was used as a base polymer material and the silver nanoparticles, silver nanowires or titanium dioxide were incorporated into the matrix. The aim was to produce polymeric membranes containing nanoparticles, fabricated by electrospinning in order to obtain the highest bactericidal effect for water treatment. The bactericidal effect was observed for three kinds of membranes however, the best results were obtained by the silver nanoparticles membrane with the in situ manufacturing method. The distribution of the nanoparticles in this membrane resulted more uniform, the size of the nanoparticles was smaller and the texture was the most mechanically resistant.