000164033 001__ 164033
000164033 005__ 20251121161351.0
000164033 0247_ $$2doi$$a10.1039/d5ta04211a
000164033 0248_ $$2sideral$$a146284
000164033 037__ $$aART-2025-146284
000164033 041__ $$aeng
000164033 100__ $$aRefaat, Dalia$$uUniversidad de Zaragoza
000164033 245__ $$aMixed matrix membranes of PIM-1 incorporating MOF-808 functionalized with amino acids for enhanced CO2/CH4 separation
000164033 260__ $$c2025
000164033 5203_ $$aThis study investigates the enhancement of CO2/CH4 separation performance in mixed matrix membranes (MMMs) by incorporating amino acid-functionalized MOF-808 (MOF-808@AA; AA = Lys, Arg and Cys) into a polymer of intrinsic microporosity (PIM-1) matrix. MMMs containing 10 wt% MOF-808@AA were fabricated via solution casting. The structural and physicochemical properties of PIM-1, MOF-808@AA, and the resulting MMMs were characterized using 1H-NMR, FTIR, TGA, SEM, XRD, SAXS, N2/77 K and CO2/15 °C isotherms, and high-pressure CO2 adsorption. Collectively, the characterization results confirm the successful incorporation of MOF-808@AA into the PIM-1 membranes, with no detectable alteration of the nanostructure of the PIM-1 matrix. Gas separation measurements revealed a notable increase in both CO2 permeability and CO2/CH4 selectivity upon incorporation of MOF-808@AA fillers. Among the tested membranes, the PIM-1/MOF-808@Lys MMM functionalized with lysine exhibited the best performance, achieving a CO2 permeability of 14 354 ± 201 Barrer and a CO2/CH4 selectivity of 26.4 ± 1.8. Aging effects were also studied, showing a reduction in CO2 permeability accompanied by a slight increase in selectivity over time. In addition, the single and mixed gas experiments at elevated pressures (up to 6 bar) showed that CO2 permeability under mixed gas conditions was slightly higher than in single gas experiments, supporting the potential of these MMMs for application in realistic CO2/CH4 separation processes under practical operating conditions. Inelastic neutron scattering (INS) and density functional theory (DFT) calculations confirmed that CO2 molecules preferentially interact with the amino groups introduced by AA functionalization. DFT simulations further revealed that while CO2 and CH4 access similar adsorption sites, the interaction energy of CO2 with amino groups is approximately three times higher than that of CH4. These findings demonstrate that MOF-808@AA fillers can significantly enhance the CO2-philicity of PIM-1-based MMMs, offering a promising approach for efficient CO2/CH4 separation compared to pristine PIM-1 or unmodified PIM-1/MOF-808 composites.
000164033 536__ $$9info:eu-repo/grantAgreement/ES/DGA/T68-23R$$9info:eu-repo/grantAgreement/ES/MICINN/CEX2023-001286-S$$9info:eu-repo/grantAgreement/ES/MICINN/PID2021-122940OB-C31$$9info:eu-repo/grantAgreement/ES/MICINN/PID2022-138582OB-I00$$9info:eu-repo/grantAgreement/EUR/MICINN/TED2021-130621B-C4
000164033 540__ $$9info:eu-repo/semantics/closedAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000164033 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000164033 700__ $$aYahia, Mohamed
000164033 700__ $$aMartínez-Hernández, Harol David
000164033 700__ $$aJiménez-Ruiz, Monica
000164033 700__ $$aGalván, Vanessa
000164033 700__ $$aPetrenko, Viktor
000164033 700__ $$aFernández de Luis, Roberto
000164033 700__ $$0(orcid)0000-0003-1512-4500$$aCoronas, Joaquín$$uUniversidad de Zaragoza
000164033 7102_ $$15005$$2555$$aUniversidad de Zaragoza$$bDpto. Ing.Quím.Tecnol.Med.Amb.$$cÁrea Ingeniería Química
000164033 773__ $$g13, 45 (2025), 39254-39270$$pJ. mater. chem. A$$tJournal of Materials Chemistry A$$x2050-7488
000164033 8564_ $$s2627557$$uhttps://zaguan.unizar.es/record/164033/files/texto_completo.pdf$$yVersión publicada$$zinfo:eu-repo/date/embargoEnd/2026-10-10
000164033 8564_ $$s2648646$$uhttps://zaguan.unizar.es/record/164033/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada$$zinfo:eu-repo/date/embargoEnd/2026-10-10
000164033 909CO $$ooai:zaguan.unizar.es:164033$$particulos$$pdriver
000164033 951__ $$a2025-11-21-14:25:09
000164033 980__ $$aARTICLE